{"id":564,"date":"2022-11-06T10:06:41","date_gmt":"2022-11-06T10:06:41","guid":{"rendered":"https:\/\/neosumk.com\/?page_id=564"},"modified":"2026-08-15T19:32:29","modified_gmt":"2026-08-15T11:32:29","slug":"epoxy-coating-for-magnets","status":"publish","type":"page","link":"https:\/\/ct.semitanker.com\/es\/epoxy-coating-for-magnets\/","title":{"rendered":"Recubrimiento epoxi para imanes"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"564\" class=\"elementor elementor-564\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5ce666f e-con e-atomic-element e-div-block-base e-5ce666f-161b48a \" data-id=\"5ce666f\" data-element_type=\"e-div-block\" data-e-type=\"e-div-block\" data-interaction-id=\"5ce666f\" data-e-type=\"e-div-block\" data-id=\"5ce666f\">\n    \t\t<div class=\"elementor-element elementor-element-1caa5f5 elementor-widget elementor-widget-html\" data-id=\"1caa5f5\" data-element_type=\"widget\" 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strong{color:var(--osenc-blue)}\r\n.osenc-pdp details{border:1px solid var(--osenc-line);border-radius:9px;background:#fff;margin:10px 0;padding:0 16px}\r\n.osenc-pdp summary{cursor:pointer;font-weight:700;padding:15px 0;color:#173a53}\r\n.osenc-pdp details p{padding:0 0 16px;margin:0}\r\n.osenc-pdp .final-cta{background:#0c4d80;color:#fff;border-radius:16px;padding:32px}\r\n.osenc-pdp .final-cta h2,.osenc-pdp .final-cta p{color:#fff}\r\n.osenc-pdp .final-cta .btn{background:#fff;color:#0c4d80}\r\n.osenc-pdp .smallprint{font-size:13px;color:var(--osenc-muted)}\r\n\r\n@media(max-width:900px){\r\n  .osenc-pdp .hero-grid,.osenc-pdp .two-col{grid-template-columns:1fr}\r\n  .osenc-pdp .cap-grid,.osenc-pdp .shape-grid,.osenc-pdp .stack-grid{grid-template-columns:repeat(2,1fr)}\r\n  .osenc-pdp .hero{padding:36px 0}\r\n}\r\n@media(max-width:600px){\r\n  .osenc-pdp .wrap{padding:0 16px}\r\n  .osenc-pdp h1{font-size:30px}\r\n  .osenc-pdp h2{font-size:24px}\r\n  .osenc-pdp .section{padding:42px 0}\r\n  .osenc-pdp .cap-grid,.osenc-pdp .shape-grid,.osenc-pdp .stack-grid,.osenc-pdp .size-grid,.osenc-pdp .boundary-grid,.osenc-pdp .qc-grid,.osenc-pdp .rfq{grid-template-columns:1fr}\r\n  .osenc-pdp .lead{font-size:17px}\r\n  .osenc-pdp .hero-grid{gap:28px}\r\n  .osenc-pdp .btn{width:100%;text-align:center}\r\n}\r\n<\/style>\r\n\r\n<section class=\"osenc-pdp\">\r\n\r\n  <section class=\"hero\">\r\n    <div class=\"wrap hero-grid\">\r\n      <div>\r\n        <div class=\"eyebrow\">Custom Epoxy Coated Magnet Manufacturer<\/div>\r\n        <h1>Custom Epoxy Coated Neodymium Magnets<\/h1>\r\n        <p class=\"lead\"><strong>OSENC is a custom epoxy coated neodymium magnet manufacturer<\/strong> producing Disc, Block, Ring, Cylinder, Arc, Countersunk and drawing-based non-standard geometries. Our confirmed epoxy coating thickness range is 15\u201340 \u03bcm, with finished dimensional tolerance of \u00b10.10 mm standard and \u00b10.05 mm tight for suitable geometries.<\/p>\r\n        <p>We treat the magnet and the coating as one engineered part. Grade, geometry, magnetization, coating system, color, working temperature, assembly fit and service environment are reviewed together before production.<\/p>\r\n        <div class=\"hero-proof\">\r\n          <span>15\u201340 \u03bcm Epoxy Coating<\/span>\r\n          <span>\u00b10.05 mm Tight Finished Tolerance<\/span>\r\n          <span>24 h No Visible Rust*<\/span>\r\n          <span>6+ Core Shapes<\/span>\r\n        <\/div>\r\n        <p class=\"smallprint\">*Published salt-spray reference: 5% NaCl at 35\u00b0C, continuous spray. This is a test reference, not a universal service-life guarantee.<\/p>\r\n        <p><a class=\"btn\" href=\"https:\/\/ct.semitanker.com\/contact-us\/\">Send Your Drawing for Quotation<\/a><\/p>\r\n        <p class=\"note\">Send Shape \/ Dimensions \/ Tolerance \/ Grade \/ Magnetization \/ Epoxy System \/ Color \/ Operating Temperature \/ Environment \/ Quantity \/ Drawing.<\/p>\r\n      <\/div>\r\n      <div>\r\n        <img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/ct.semitanker.com\/wp-content\/uploads\/2023\/01\/epoxy-magnets.webp\" width=\"624\" height=\"624\" alt=\"OSENC black epoxy coated neodymium magnets in multiple shapes\" loading=\"eager\" fetchpriority=\"high\">\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"section\">\r\n    <div class=\"wrap\">\r\n      <div class=\"section-kicker\">Quick Answer<\/div>\r\n      <h2>OSENC Epoxy Coated Magnet Supply Capability<\/h2>\r\n      <div class=\"quick-answer\">\r\n        <p><strong>OSENC supplies custom epoxy coated NdFeB magnets as finished engineered components, not generic coated blanks.<\/strong> Confirmed epoxy coating thickness is 15\u201340 \u03bcm. Finished dimensional tolerance is \u00b10.10 mm standard and \u00b10.05 mm tight for suitable geometries. In a published salt-spray reference using 5% NaCl at 35\u00b0C under continuous spray, samples showed no visible rust after 24 hours; localized corrosion began on individual samples after 48\u201372 hours, and after 408 hours corrosion remained concentrated mainly at corners and edges with 0.907% average mass loss.<\/p>\r\n      <\/div>\r\n\r\n      <div class=\"cap-grid\">\r\n        <div class=\"cap-card\"><strong>Custom Shapes<\/strong>Disc, Block, Ring, Cylinder, Arc, Countersunk and drawing-based non-standard geometries.<\/div>\r\n        <div class=\"cap-card\"><strong>NdFeB Grades<\/strong>N35, N38, N40, N42, N45, N48, N50, N52 plus M \/ H \/ SH \/ UH \/ EH temperature-grade families.<\/div>\r\n        <div class=\"cap-card\"><strong>Epoxy Thickness<\/strong>Confirmed 15\u201340 \u03bcm coating range. Final coating requirement is released with the project drawing and QC plan.<\/div>\r\n        <div class=\"cap-card\"><strong>Magnetization<\/strong>Axial, Diametrical, Through Thickness, Length, Width and special Multipole Magnetization.<\/div>\r\n        <div class=\"cap-card\"><strong>Finished Dimensions<\/strong>Standard finished tolerance \u00b10.10 mm; tight tolerance \u00b10.05 mm for suitable coated geometries.<\/div>\r\n        <div class=\"cap-card\"><strong>Salt-Spray Reference<\/strong>5% NaCl at 35\u00b0C, continuous spray; no visible rust after 24 h in the published reference test.<\/div>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"section alt\">\r\n    <div class=\"wrap\">\r\n      <div class=\"section-kicker\">Specification Snapshot<\/div>\r\n      <h2>Epoxy Coated Neodymium Magnet Capabilities<\/h2>\r\n      <div class=\"table-wrap\">\r\n        <table>\r\n          <thead>\r\n            <tr><th>Specification<\/th><th>OSENC Capability<\/th><th>Engineering Control<\/th><\/tr>\r\n          <\/thead>\r\n          <tbody>\r\n            <tr><td><strong>Magnet Material<\/strong><\/td><td>Sintered NdFeB<\/td><td>Grade is selected around magnetic output, working temperature, geometry and application.<\/td><\/tr>\r\n            <tr><td><strong>Shapes<\/strong><\/td><td>Disc, Block, Ring, Cylinder, Arc, Countersunk, custom geometry<\/td><td>Manufactured to approved drawing.<\/td><\/tr>\r\n            <tr><td><strong>Grades<\/strong><\/td><td>N35-N52; M \/ H \/ SH \/ UH \/ EH families<\/td><td>High-temperature projects use the matching magnet grade rather than relying on the coating temperature alone.<\/td><\/tr>\r\n            <tr><td><strong>Coating Stacks<\/strong><\/td><td>NdFeB + Epoxy; NdFeB + Ni-Cu-Ni + Epoxy; composite protection<\/td><td>Selected around corrosion risk, dimensions, adhesion and surface protection.<\/td><\/tr>\r\n            <tr><td><strong>Epoxy Coating Thickness<\/strong><\/td><td>15\u201340 \u03bcm<\/td><td>Confirmed coating range; released thickness is selected around protection, clearance and finished dimensions.<\/td><\/tr>\r\n            <tr><td><strong>Coating Thickness Tolerance<\/strong><\/td><td>Project-confirmed; current engineering reference \u00b13 \u03bcm<\/td><td>The \u00b13 \u03bcm value is provisional and must be confirmed in the quotation or sample validation plan before it is treated as a production tolerance.<\/td><\/tr>\r\n            <tr><td><strong>Finished Dimensional Tolerance<\/strong><\/td><td>Standard \u00b10.10 mm; tight \u00b10.05 mm<\/td><td>Applies to the finished epoxy-coated part for suitable geometries.<\/td><\/tr>\r\n            <tr><td><strong>Minimum Coated Size<\/strong><\/td><td>Current engineering reference \u00d81 \u00d7 0.5 mm<\/td><td>This minimum is provisional and requires final review of geometry, magnetization, coating build, handling and sample validation.<\/td><\/tr>\r\n            <tr><td><strong>Published Salt-Spray Reference<\/strong><\/td><td>5% NaCl, 35\u00b0C, continuous spray<\/td><td>No visible rust at 24 h; localized corrosion began on individual samples at 48\u201372 h; after 408 h corrosion remained mainly at corners and edges; average mass loss 0.907%.<\/td><\/tr>\r\n            <tr><td><strong>Colors<\/strong><\/td><td>Black, White, Grey, custom colors<\/td><td>Color is included in the coating specification.<\/td><\/tr>\r\n            <tr><td><strong>Magnetization<\/strong><\/td><td>Axial, Diametrical, Thickness, Length, Width, Multipole<\/td><td>Confirmed against shape and final assembly direction.<\/td><\/tr>\r\n            <tr><td><strong>Dimensions<\/strong><\/td><td>Standard and drawing-based custom sizes<\/td><td>Final inspection is performed on coated finished dimensions; standard tolerance \u00b10.10 mm and tight tolerance \u00b10.05 mm for suitable geometries.<\/td><\/tr>\r\n            <tr><td><strong>QC<\/strong><\/td><td>Coating thickness, appearance, finished dimensions, surface integrity, adhesion and magnetization<\/td><td>Salt-spray or other environmental validation is defined by test method, sample condition, duration and acceptance criteria.<\/td><\/tr>\r\n            <tr><td><strong>Packaging<\/strong><\/td><td>Separated protective packing<\/td><td>Configured to reduce magnet-to-magnet collision, edge chipping and coating scratching.<\/td><\/tr>\r\n          <\/tbody>\r\n        <\/table>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"section\">\r\n    <div class=\"wrap\">\r\n      <div class=\"section-kicker\">Custom Geometry<\/div>\r\n      <h2>Epoxy Coated Magnet Shapes We Manufacture<\/h2>\r\n      <p class=\"intro\">OSENC manufactures both standard geometry and drawing-based epoxy coated magnets. We control edge features, chamfers, holes and countersunk areas as part of the part design because sharp transitions and exposed edges are higher-risk locations for coating continuity and mechanical damage.<\/p>\r\n\r\n      <div class=\"shape-grid\">\r\n        <div class=\"shape-card\">\r\n          <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ct.semitanker.com\/wp-content\/uploads\/2023\/01\/Epoxy-coating-300x300.webp\" width=\"300\" height=\"300\" alt=\"OSENC black epoxy coated neodymium disc magnets\" loading=\"lazy\">\r\n          <div class=\"body\"><h3>Disc & Cylinder<\/h3><p>Axial or diametrical magnetization with coated finished diameter and thickness controlled to the drawing.<\/p><\/div>\r\n        <\/div>\r\n        <div class=\"shape-card\">\r\n          <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ct.semitanker.com\/wp-content\/uploads\/2023\/01\/epoxy-magnet-300x300.webp\" width=\"300\" height=\"300\" alt=\"OSENC black epoxy coated neodymium block magnets\" loading=\"lazy\">\r\n          <div class=\"body\"><h3>Block<\/h3><p>Through-thickness, length or width magnetization for compact industrial and OEM assemblies.<\/p><\/div>\r\n        <\/div>\r\n        <div class=\"shape-card\">\r\n          <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ct.semitanker.com\/wp-content\/uploads\/2023\/01\/epoxy-magnets.webp\" width=\"624\" height=\"624\" alt=\"OSENC epoxy coated ring and custom shape neodymium magnets\" loading=\"lazy\">\r\n          <div class=\"body\"><h3>Ring, Arc & Countersunk<\/h3><p>Ring, Arc and Countersunk geometry with edge design and coating protection considered before production.<\/p><\/div>\r\n        <\/div>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"section alt\">\r\n    <div class=\"wrap\">\r\n      <div class=\"section-kicker\">Production Sizes<\/div>\r\n      <h2>Common Epoxy Coated Magnet Sizes<\/h2>\r\n      <p>These are common OSENC production sizes. They are not catalog limits. We manufacture to customer drawings and control the finished coated dimensions against the approved part requirements.<\/p>\r\n      <div class=\"size-grid\">\r\n        <div class=\"size-box\">\r\n          <h3>Disc Magnets<\/h3>\r\n          <div class=\"size-tags\">\r\n            <span>D10 \u00d7 1 mm<\/span>\r\n            <span>D15 \u00d7 1 mm<\/span>\r\n            <span>D20 \u00d7 2 mm<\/span>\r\n            <span>D20 \u00d7 3 mm<\/span>\r\n            <span>D25 \u00d7 10 mm<\/span>\r\n            <span>D40 \u00d7 10 mm<\/span>\r\n          <\/div>\r\n        <\/div>\r\n        <div class=\"size-box\">\r\n          <h3>Block Magnets<\/h3>\r\n          <div class=\"size-tags\">\r\n            <span>20 \u00d7 12 \u00d7 5 mm<\/span>\r\n            <span>20 \u00d7 20 \u00d7 12 mm<\/span>\r\n            <span>30 \u00d7 15 \u00d7 5 mm<\/span>\r\n          <\/div>\r\n        <\/div>\r\n      <\/div>\r\n      <div class=\"boundary\"><strong>Drawing-based production:<\/strong> Ring, Cylinder, Arc, Countersunk and non-standard shapes are manufactured to approved dimensions, tolerances, coating requirements and magnetization directions.<\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"section\">\r\n    <div class=\"wrap\">\r\n      <div class=\"section-kicker\">Surface Protection<\/div>\r\n      <h2>OSENC Epoxy Coating Systems for NdFeB Magnets<\/h2>\r\n      <p class=\"intro\">OSENC selects the coating stack around the actual exposure and dimensional requirements. We do not use one generic \u201cepoxy\u201d specification for every project.<\/p>\r\n      <div class=\"stack-grid\">\r\n        <div class=\"stack-card\"><strong>NdFeB + Epoxy<\/strong>Direct epoxy protection for projects requiring a dark protective finish, humidity resistance and improved surface protection.<\/div>\r\n        <div class=\"stack-card\"><strong>NdFeB + Ni-Cu-Ni + Epoxy<\/strong>Composite protection that combines a metallic underlayer with an epoxy top layer where the project requires a different corrosion and surface protection route.<\/div>\r\n        <div class=\"stack-card\"><strong>Enhanced Composite Protection<\/strong>For salt water, long-term immersion or more demanding environments, OSENC uses a higher-level coating or encapsulation strategy rather than treating standard epoxy as a permanent seal.<\/div>\r\n      <\/div>\r\n\r\n      <div class=\"boundary\">\r\n        <strong>Temperature is defined at magnet level.<\/strong> OSENC does not use a generic coating temperature rating as the finished magnet operating temperature. Magnet Grade, Geometry, Magnetic Circuit and Coating System are reviewed together. High-temperature projects use the matching H \/ SH \/ UH \/ EH material family.\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"section alt\" id=\"epoxy-thickness-salt-spray\">\r\n    <div class=\"wrap\">\r\n      <div class=\"section-kicker\">Thickness, Tolerance &amp; Corrosion Reference<\/div>\r\n      <h2>Epoxy Coating Thickness, Finished Tolerance and Salt-Spray Test Reference<\/h2>\r\n      <p class=\"intro\">Epoxy coating performance cannot be reduced to one corrosion-resistance slogan. OSENC separates coating thickness, finished dimensional tolerance and environmental test performance so each requirement can be released and inspected independently.<\/p>\r\n      <div class=\"table-wrap\">\r\n        <table>\r\n          <thead><tr><th>Engineering Parameter<\/th><th>OSENC Reference<\/th><th>Release Boundary<\/th><\/tr><\/thead>\r\n          <tbody>\r\n            <tr><td><strong>Epoxy Coating Thickness<\/strong><\/td><td>15\u201340 \u03bcm<\/td><td>Confirmed production range; final target is set from the drawing, protection requirement and dimensional stack-up.<\/td><\/tr>\r\n            <tr><td><strong>Coating Thickness Tolerance<\/strong><\/td><td>Current engineering reference \u00b13 \u03bcm<\/td><td>Provisional. It must be confirmed in the quotation or sample validation plan before production release.<\/td><\/tr>\r\n            <tr><td><strong>Standard Finished Tolerance<\/strong><\/td><td>\u00b10.10 mm<\/td><td>Applied to the finished epoxy-coated part.<\/td><\/tr>\r\n            <tr><td><strong>Tight Finished Tolerance<\/strong><\/td><td>\u00b10.05 mm<\/td><td>Used for suitable geometries where fit and assembly clearance require tighter control.<\/td><\/tr>\r\n            <tr><td><strong>Minimum Coated Magnet<\/strong><\/td><td>Current engineering reference \u00d81 \u00d7 0.5 mm<\/td><td>Provisional. Final feasibility depends on geometry, magnetization, coating build, handling and sample validation.<\/td><\/tr>\r\n          <\/tbody>\r\n        <\/table>\r\n      <\/div>\r\n      <div class=\"boundary\">\r\n        <strong>Published salt-spray reference:<\/strong> 5% NaCl solution at 35\u00b0C under continuous spray. No visible rust was observed after 24 hours. Localized corrosion began on individual samples after 48\u201372 hours. After 408 hours, corrosion remained concentrated mainly at corners and edges. Average mass loss was 0.907%.\r\n      <\/div>\r\n      <p class=\"smallprint\">This salt-spray result is a published test reference for the tested samples and conditions. It is not a universal service-life guarantee for every epoxy-coated magnet. Geometry, edge condition, coating stack, substrate preparation, assembly damage and exposure conditions can change corrosion behavior.<\/p>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"section alt\">\r\n    <div class=\"wrap two-col\">\r\n      <div>\r\n        <div class=\"section-kicker\">Applications<\/div>\r\n        <h2>Where OSENC Uses Epoxy Coated NdFeB Magnets<\/h2>\r\n        <p>Epoxy coated magnets are a strong fit for OEM and industrial projects where the NdFeB surface needs additional protection from humidity, moisture or intermittent water exposure and the coating can remain intact during assembly and service.<\/p>\r\n        <ul>\r\n          <li>Sensors and compact electronic assemblies<\/li>\r\n          <li>Industrial fixtures and positioning components<\/li>\r\n          <li>Automation equipment and enclosed mechanisms<\/li>\r\n          <li>OEM products exposed to humidity or intermittent moisture<\/li>\r\n          <li>Assemblies where a black, white, grey or custom protective finish is required<\/li>\r\n        <\/ul>\r\n        <p>For weak acid, weak alkali, oil or cleaning-media exposure, OSENC matches the coating system to the chemical type, concentration, temperature and exposure time instead of using one broad \u201cchemical resistant\u201d claim.<\/p>\r\n      <\/div>\r\n      <div class=\"media\">\r\n        <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ct.semitanker.com\/wp-content\/uploads\/2023\/01\/epoxy-magnets.webp\" width=\"624\" height=\"624\" alt=\"Black epoxy coated NdFeB magnets for industrial and OEM applications\" loading=\"lazy\">\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"section\">\r\n    <div class=\"wrap\">\r\n      <div class=\"section-kicker\">Engineering Boundary<\/div>\r\n      <h2>When We Use a Different Protection Strategy<\/h2>\r\n      <p>OSENC does not force standard epoxy into applications where the failure mode is obvious. When the service condition exceeds the practical boundary of a conventional epoxy surface layer, we move the project to a more suitable coating or encapsulation system.<\/p>\r\n      <div class=\"boundary-grid\">\r\n        <div class=\"boundary-item\"><strong>Continuous Abrasion<\/strong><br>Sliding contact can wear through the protective layer. We use a protection route designed for repeated friction.<\/div>\r\n        <div class=\"boundary-item\"><strong>Repeated Impact<\/strong><br>Impact and magnet-to-magnet collision increase the risk of edge chipping and coating cracking.<\/div>\r\n        <div class=\"boundary-item\"><strong>Severe Scratching<\/strong><br>Scratches can expose NdFeB below the coating. Assembly contact points are reviewed before production.<\/div>\r\n        <div class=\"boundary-item\"><strong>Long-Term Aggressive Exposure<\/strong><br>Long-term seawater, strong chemical or immersion projects move to an enhanced composite coating or encapsulation solution.<\/div>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"section alt\">\r\n    <div class=\"wrap\">\r\n      <div class=\"section-kicker\">Quality Control<\/div>\r\n      <h2>Epoxy Coated Magnet Quality Control and Inspection<\/h2>\r\n      <p class=\"intro\">Epoxy protection only works when the finished part meets the drawing and the coating remains continuous. OSENC therefore controls finished dimensions, coating thickness, surface integrity, adhesion and magnetization as part of the finished-part inspection route. Confirmed coating range is 15\u201340 \u03bcm; finished dimensional tolerance is \u00b10.10 mm standard and \u00b10.05 mm tight for suitable geometries.<\/p>\r\n\r\n      <div class=\"qc-grid\">\r\n        <div class=\"qc-card\">\r\n          <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ct.semitanker.com\/wp-content\/uploads\/2026\/05\/Dimension-Inspection.webp\" width=\"800\" height=\"600\" alt=\"OSENC magnet finished dimension inspection with caliper\" loading=\"lazy\">\r\n          <div class=\"body\">\r\n            <span class=\"pass\">FINISHED-PART CONTROL<\/span>\r\n            <h3>Finished Dimension Inspection<\/h3>\r\n            <p>L \/ W \/ D \/ T and other critical dimensions are inspected after coating so the part is controlled in the same state in which the customer receives and assembles it.<\/p>\r\n          <\/div>\r\n        <\/div>\r\n\r\n        <div class=\"qc-card\">\r\n          <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ct.semitanker.com\/wp-content\/uploads\/2026\/05\/Coating-Inspection.webp\" width=\"800\" height=\"600\" alt=\"OSENC coating inspection on neodymium magnets\" loading=\"lazy\">\r\n          <div class=\"body\">\r\n            <span class=\"pass\">COATING CONTROL<\/span>\r\n            <h3>Coating & Surface Inspection<\/h3>\r\n            <p>OSENC checks the released epoxy thickness requirement together with visual condition and surface integrity. The confirmed coating range is 15\u201340 \u03bcm. The current \u00b13 \u03bcm coating-thickness tolerance is an engineering reference and is confirmed project by project before production release.<\/p>\r\n            <ul>\r\n              <li>Pinholes and bubbles<\/li>\r\n              <li>Cracks and edge chips<\/li>\r\n              <li>Scratches<\/li>\r\n              <li>Exposed substrate<\/li>\r\n            <\/ul>\r\n          <\/div>\r\n        <\/div>\r\n\r\n        <div class=\"qc-card\">\r\n          <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ct.semitanker.com\/wp-content\/uploads\/2026\/05\/Magnetization-Direction-Check.webp\" width=\"800\" height=\"600\" alt=\"OSENC neodymium magnet magnetization direction check\" loading=\"lazy\">\r\n          <div class=\"body\">\r\n            <span class=\"pass\">MAGNETIC DIRECTION<\/span>\r\n            <h3>Magnetization Direction Check<\/h3>\r\n            <p>Axial, diametrical, through-thickness, length, width and special multipole directions are confirmed against the approved project requirement before packing.<\/p>\r\n          <\/div>\r\n        <\/div>\r\n\r\n        <div class=\"qc-card\">\r\n          <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ct.semitanker.com\/wp-content\/uploads\/2026\/05\/Packaging-Protection.webp\" width=\"800\" height=\"600\" alt=\"OSENC protective export packaging for custom magnets\" loading=\"lazy\">\r\n          <div class=\"body\">\r\n            <span class=\"pass\">SURFACE PROTECTION<\/span>\r\n            <h3>Separated Protective Packaging<\/h3>\r\n            <p>Packaging is configured around magnetic force, size and quantity to reduce magnet-to-magnet collision, edge chipping and coating scratching. Separators, foam or individual isolation are used according to the product.<\/p>\r\n          <\/div>\r\n        <\/div>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"section\">\r\n    <div class=\"wrap\">\r\n      <div class=\"final-cta\">\r\n        <h2>Have an Epoxy Magnet Drawing Ready?<\/h2>\r\n        <p>Send the finished dimensions, tolerance, grade, magnetization, coating requirement and service environment. OSENC will review the complete coated magnetic component, including coating build, finished fit and QC requirements.<\/p>\r\n        <a class=\"btn\" href=\"https:\/\/ct.semitanker.com\/contact-us\/\">Request Engineering Review<\/a>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"section\">\r\n    <div class=\"wrap\">\r\n      <div class=\"section-kicker\">Coating Selection<\/div>\r\n      <h2>Epoxy vs Nickel, Parylene and PTFE Magnet Coatings<\/h2>\r\n      <div class=\"table-wrap\">\r\n        <table>\r\n          <thead><tr><th>OSENC Coating Solution<\/th><th>We Use It For<\/th><th>Engineering Boundary<\/th><\/tr><\/thead>\r\n          <tbody>\r\n            <tr><td><strong>Epoxy<\/strong><\/td><td>Humidity, moisture protection and a black or custom protective finish.<\/td><td>Avoid continuous abrasion, repeated impact and severe scratching.<\/td><\/tr>\r\n            <tr><td><a href=\"https:\/\/ct.semitanker.com\/neodymium-magnet-coating\/\"><strong>Ni-Cu-Ni<\/strong><\/a><\/td><td>General industrial NdFeB applications that use a common metallic finish.<\/td><td>Not our default route for prolonged wet or aggressive chemical exposure.<\/td><\/tr>\r\n            <tr><td><a href=\"https:\/\/ct.semitanker.com\/parylene-coating-for-magnets\/\"><strong>Parylene<\/strong><\/a><\/td><td>Thin conformal protection for precision or sensitive assemblies.<\/td><td>Thickness, coverage and adhesion remain project-controlled parameters.<\/td><\/tr>\r\n            <tr><td><a href=\"https:\/\/ct.semitanker.com\/teflon-coated-magnets\/\"><strong>PTFE<\/strong><\/a><\/td><td>Chemical-media or low-friction requirements.<\/td><td>The exact media, temperature and exposure time define the suitable PTFE system.<\/td><\/tr>\r\n          <\/tbody>\r\n        <\/table>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"section alt\">\r\n    <div class=\"wrap\">\r\n      <div class=\"section-kicker\">RFQ Checklist<\/div>\r\n      <h2>Send These Parameters for an Accurate Epoxy Magnet Quote<\/h2>\r\n      <p>OSENC engineering reviews the magnetic part and surface protection together. Complete RFQ data reduces repeated clarification and moves the project directly into technical review and quotation.<\/p>\r\n      <div class=\"rfq\">\r\n        <div><strong>1. Shape<\/strong><br>Disc \/ Block \/ Ring \/ Cylinder \/ Arc \/ Countersunk \/ Custom.<\/div>\r\n        <div><strong>2. Dimensions<\/strong><br>Diameter, length, width, thickness, holes, chamfers and fit dimensions.<\/div>\r\n        <div><strong>3. Tolerance<\/strong><br>Critical finished dimensions and assembly-fit requirements.<\/div>\r\n        <div><strong>4. Magnet Grade<\/strong><br>N35-N52 or M \/ H \/ SH \/ UH \/ EH family, if already specified.<\/div>\r\n        <div><strong>5. Magnetization<\/strong><br>Axial, Diametrical, Thickness, Length, Width or Multipole.<\/div>\r\n        <div><strong>6. Epoxy System<\/strong><br>Direct Epoxy, Ni-Cu-Ni + Epoxy or application-defined protection.<\/div>\r\n        <div><strong>7. Color<\/strong><br>Black, White, Grey or custom color requirement.<\/div>\r\n        <div><strong>8. Temperature<\/strong><br>Normal operating temperature, peak temperature and exposure duration.<\/div>\r\n        <div><strong>9. Working Environment<\/strong><br>Humidity, water, salt, oil, chemicals, abrasion, impact or immersion.<\/div>\r\n        <div><strong>10. Quantity & Drawing<\/strong><br>Sample quantity, production volume and 2D\/3D drawing.<\/div>\r\n      <\/div>\r\n      <div class=\"boundary\"><strong>Do not have every parameter yet?<\/strong> Send your drawing and application first. OSENC can identify the missing grade, coating, magnetization, tolerance and validation inputs during engineering review.<\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"section alt\">\r\n    <div class=\"wrap\">\r\n      <div class=\"section-kicker\">Engineering Review Output<\/div>\r\n      <h2>What You Get From OSENC Engineering Review<\/h2>\r\n      <div class=\"cap-grid\">\r\n        <div class=\"cap-card\"><strong>Magnet Grade Review<\/strong>Check N35\u2013N52 or M \/ H \/ SH \/ UH \/ EH selection against magnetic output, geometry and operating temperature.<\/div>\r\n        <div class=\"cap-card\"><strong>Coating System Review<\/strong>Confirm direct Epoxy, Ni-Cu-Ni + Epoxy or a higher-level protection route from the actual service environment.<\/div>\r\n        <div class=\"cap-card\"><strong>Tolerance Review<\/strong>Check finished dimensions, coating build and assembly clearance against the drawing.<\/div>\r\n        <div class=\"cap-card\"><strong>Magnetization Review<\/strong>Confirm pole direction, magnetization method and assembly orientation before sample release.<\/div>\r\n        <div class=\"cap-card\"><strong>QC &amp; Environment Review<\/strong>Define coating inspection, salt-spray or other environmental validation from the project requirement.<\/div>\r\n        <div class=\"cap-card\"><strong>Prototype &amp; Quotation<\/strong>Return the reviewed manufacturing route, sample requirements and quotation inputs needed to move into production.<\/div>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"section\">\r\n    <div class=\"wrap\">\r\n      <div class=\"section-kicker\">Buyer FAQ<\/div>\r\n      <h2>Epoxy Coated Neodymium Magnet FAQ<\/h2>\r\n\r\n      <details>\r\n        <summary>What epoxy coated magnet shapes does OSENC manufacture?<\/summary>\r\n        <p>OSENC manufactures Disc, Block, Ring, Cylinder, Arc and Countersunk epoxy coated neodymium magnets, plus drawing-based non-standard geometries.<\/p>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>What NdFeB grades are available for epoxy coated magnets?<\/summary>\r\n        <p>OSENC supplies N35, N38, N40, N42, N45, N48, N50 and N52 grade families, together with M \/ H \/ SH \/ UH \/ EH temperature-grade series. The final grade is selected around magnetic performance, temperature, geometry and the magnetic circuit.<\/p>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>What magnetization directions does OSENC support?<\/summary>\r\n        <p>Disc, Ring and Cylinder magnets can use Axial or Diametrical magnetization. Block magnets can be magnetized Through Thickness, Length or Width. Special structures can use Multipole Magnetization when the geometry and magnetic design support it.<\/p>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>Does OSENC control dimensions after epoxy coating?<\/summary>\r\n        <p>Yes. OSENC controls critical dimensions in the coated finished state. Coating build-up is included in the dimensional stack when the magnet fits into a narrow gap, housing or precision assembly.<\/p>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>Which epoxy coating systems are available?<\/summary>\r\n        <p>OSENC supplies NdFeB + Epoxy and NdFeB + Ni-Cu-Ni + Epoxy, together with other composite protection structures for projects requiring a different corrosion, adhesion or surface-protection strategy.<\/p>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>Can OSENC manufacture black, white or grey epoxy coated magnets?<\/summary>\r\n        <p>Yes. Black Epoxy is a core option, and OSENC also supports White, Grey and custom color projects as part of the coating specification.<\/p>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>How does OSENC define corrosion and salt-spray performance?<\/summary>\r\n        <p>Corrosion performance is tied to the actual coating system and test requirement. For salt-spray projects, OSENC works against the specified test method, duration, sample condition and acceptance criteria rather than treating one unqualified hour value as a universal guarantee.<\/p>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>What epoxy coating thickness does OSENC supply?<\/summary>\r\n        <p>OSENC's confirmed epoxy coating thickness range is 15\u201340 \u03bcm. The current \u00b13 \u03bcm coating-thickness tolerance is a provisional engineering reference and is confirmed in the quotation or sample validation plan before it is released as a production requirement.<\/p>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>What finished dimensional tolerance can OSENC hold on epoxy coated magnets?<\/summary>\r\n        <p>OSENC uses \u00b10.10 mm as the standard finished dimensional tolerance and \u00b10.05 mm as the tight tolerance for suitable epoxy-coated geometries. These values apply to the finished coated part.<\/p>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>What salt-spray performance has OSENC published for epoxy coated magnets?<\/summary>\r\n        <p>In the published reference test, samples were exposed to 5% NaCl solution at 35\u00b0C under continuous spray. No visible rust was observed after 24 hours. Localized corrosion began on individual samples after 48\u201372 hours. After 408 hours, corrosion remained concentrated mainly at corners and edges, with average mass loss of 0.907%.<\/p>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>What is the smallest epoxy coated magnet OSENC can review?<\/summary>\r\n        <p>\u00d81 \u00d7 0.5 mm is the current provisional engineering reference. It is not released as a universal minimum; final feasibility depends on geometry, magnetization, coating build, handling and sample validation.<\/p>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>How are epoxy coated magnets protected during shipping?<\/summary>\r\n        <p>OSENC uses separated protective packaging configured around magnet size, magnetic force and quantity. Separators, foam or individual isolation are used to reduce magnet-to-magnet collision, edge chipping and coating scratching.<\/p>\r\n      <\/details>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"section\">\r\n    <div class=\"wrap\">\r\n      <div class=\"final-cta\">\r\n        <h2>Send Your Drawing to OSENC<\/h2>\r\n        <p>Send the shape, dimensions, tolerances, grade, magnetization direction, coating system, color, working temperature, environment and quantity. OSENC will review the complete magnetic part and move the project into engineering quotation.<\/p>\r\n        <a class=\"btn\" href=\"https:\/\/ct.semitanker.com\/contact-us\/\">Request an Epoxy Magnet Quote<\/a>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n<\/section>\r\n\r\n<script type=\"application\/ld+json\">\r\n{\r\n  \"@context\": \"https:\/\/schema.org\",\r\n  \"@type\": \"Product\",\r\n  \"name\": \"Custom Epoxy Coated Neodymium Magnets\",\r\n  \"url\": \"https:\/\/ct.semitanker.com\/epoxy-coating-for-magnets\/\",\r\n  \"description\": \"Custom epoxy coated neodymium magnets manufactured by OSENC with 15-40 \u03bcm epoxy coating, finished dimensional tolerance to \u00b10.05 mm, N35-N52 and temperature-grade families, multiple coating stacks, custom magnetization and published salt-spray test data.\",\r\n  \"image\": [\r\n    \"https:\/\/ct.semitanker.com\/wp-content\/uploads\/2023\/01\/epoxy-magnets.webp\",\r\n    \"https:\/\/ct.semitanker.com\/wp-content\/uploads\/2023\/01\/Epoxy-coating-300x300.webp\",\r\n    \"https:\/\/ct.semitanker.com\/wp-content\/uploads\/2023\/01\/epoxy-magnet-300x300.webp\"\r\n  ],\r\n  \"brand\": {\r\n    \"@type\": \"Brand\",\r\n    \"name\": \"OSENC\"\r\n  },\r\n  \"manufacturer\": {\r\n    \"@type\": \"Organization\",\r\n    \"name\": \"OSENC\",\r\n    \"url\": \"https:\/\/ct.semitanker.com\/\"\r\n  },\r\n  \"category\": \"Epoxy Coated Neodymium Magnets\",\r\n  \"material\": \"Sintered Neodymium Iron Boron (NdFeB)\",\r\n  \"additionalProperty\": [\r\n    {\r\n      \"@type\": \"PropertyValue\",\r\n      \"name\": \"Shapes\",\r\n      \"value\": \"Disc, Block, Ring, Cylinder, Arc, Countersunk, Custom\"\r\n    },\r\n    {\r\n      \"@type\": \"PropertyValue\",\r\n      \"name\": \"NdFeB Grades\",\r\n      \"value\": \"N35-N52; M, H, SH, UH, EH families\"\r\n    },\r\n    {\r\n      \"@type\": \"PropertyValue\",\r\n      \"name\": \"Coating Systems\",\r\n      \"value\": \"NdFeB + Epoxy; NdFeB + Ni-Cu-Ni + Epoxy; Composite protection\"\r\n    },\r\n    {\r\n      \"@type\": \"PropertyValue\",\r\n      \"name\": \"Epoxy Coating Thickness\",\r\n      \"value\": \"15-40 \u03bcm\"\r\n    },\r\n    {\r\n      \"@type\": \"PropertyValue\",\r\n      \"name\": \"Finished Dimensional Tolerance\",\r\n      \"value\": \"Standard \u00b10.10 mm; tight \u00b10.05 mm\"\r\n    },\r\n    {\r\n      \"@type\": \"PropertyValue\",\r\n      \"name\": \"Salt Spray Test Reference\",\r\n      \"value\": \"5% NaCl at 35\u00b0C continuous spray; no visible rust after 24 h; localized corrosion began on individual samples after 48-72 h; after 408 h corrosion remained mainly at corners and edges; average mass loss 0.907%\"\r\n    },\r\n    {\r\n      \"@type\": \"PropertyValue\",\r\n      \"name\": \"Colors\",\r\n      \"value\": \"Black, White, Grey, Custom\"\r\n    },\r\n    {\r\n      \"@type\": \"PropertyValue\",\r\n      \"name\": \"Magnetization\",\r\n      \"value\": \"Axial, Diametrical, Through Thickness, Length, Width, Multipole\"\r\n    }\r\n  ]\r\n}\r\n<\/script>\r\n\r\n\r\n<script type=\"application\/ld+json\">\r\n{\r\n  \"@context\": \"https:\/\/schema.org\",\r\n  \"@type\": \"FAQPage\",\r\n  \"mainEntity\": [\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"What epoxy coating thickness does OSENC supply?\",\r\n      \"acceptedAnswer\": {\"@type\":\"Answer\",\"text\":\"OSENC's confirmed epoxy coating thickness range is 15-40 \u03bcm. 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Localized corrosion began on individual samples after 48-72 hours. After 408 hours, corrosion remained concentrated mainly at corners and edges, with average mass loss of 0.907%.\"}\r\n    },\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"What is the smallest epoxy coated magnet OSENC can review?\",\r\n      \"acceptedAnswer\": {\"@type\":\"Answer\",\"text\":\"\u00d81 \u00d7 0.5 mm is the current provisional engineering reference. Final feasibility depends on geometry, magnetization, coating build, handling and sample validation.\"}\r\n    }\r\n  ]\r\n}\r\n<\/script>\t\t\t\t<\/div>\n\t\t\n<\/div>\n\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Custom Epoxy Coated Magnet Manufacturer Custom Epoxy Coated Neodymium Magnets OSENC is a custom epoxy coated neodymium magnet manufacturer producing Disc, Block, Ring, Cylinder, Arc, Countersunk and drawing-based non-standard geometries. Our confirmed epoxy coating thickness range is 15\u201340 \u03bcm, with finished dimensional tolerance of \u00b10.10 mm standard and \u00b10.05 mm tight for suitable geometries. We [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2367,"parent":0,"menu_order":23,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-564","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/ct.semitanker.com\/es\/wp-json\/wp\/v2\/pages\/564","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ct.semitanker.com\/es\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/ct.semitanker.com\/es\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/ct.semitanker.com\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ct.semitanker.com\/es\/wp-json\/wp\/v2\/comments?post=564"}],"version-history":[{"count":9,"href":"https:\/\/ct.semitanker.com\/es\/wp-json\/wp\/v2\/pages\/564\/revisions"}],"predecessor-version":[{"id":8733,"href":"https:\/\/ct.semitanker.com\/es\/wp-json\/wp\/v2\/pages\/564\/revisions\/8733"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ct.semitanker.com\/es\/wp-json\/wp\/v2\/media\/2367"}],"wp:attachment":[{"href":"https:\/\/ct.semitanker.com\/es\/wp-json\/wp\/v2\/media?parent=564"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}