{"id":5616,"date":"2026-04-21T15:09:10","date_gmt":"2026-04-21T07:09:10","guid":{"rendered":"https:\/\/txjpcba.com\/?p=5616"},"modified":"2026-04-21T15:09:10","modified_gmt":"2026-04-21T07:09:10","slug":"how-to-prepare-pcb-before-applying-humiseal","status":"publish","type":"post","link":"https:\/\/txjpcba.com\/pt\/how-to-prepare-pcb-before-applying-humiseal\/","title":{"rendered":"How to prepare PCB before applying HumiSeal?"},"content":{"rendered":"<h2 data-start=\"0\" data-end=\"47\"><strong data-start=\"0\" data-end=\"47\">PCB before applying HumiSeal<\/strong><\/h2>\n<p data-start=\"49\" data-end=\"367\">Proper PCB preparation is the most critical step before applying <strong data-start=\"114\" data-end=\"144\">HumiSeal conformal coating<\/strong>, produced by <span class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"><span class=\"whitespace-normal\">Chase Corporation<\/span><\/span>. Em <strong data-start=\"200\" data-end=\"216\">Montagem de PCB<\/strong>, <strong data-start=\"218\" data-end=\"234\">Montagem SMT<\/strong>, e <strong data-start=\"240\" data-end=\"264\">Montagem de PCB pronta para uso<\/strong>, poor preparation is the leading cause of coating failure such as delamination, bubbles, or corrosion.<\/p>\n<figure id=\"attachment_5617\" aria-describedby=\"caption-attachment-5617\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-5617\" src=\"https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/How-to-prepare-PCB-before-applying-HumiSeal.jpg\" alt=\"How to prepare PCB before applying HumiSeal\" width=\"800\" height=\"597\" srcset=\"https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/How-to-prepare-PCB-before-applying-HumiSeal.jpg 800w, https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/How-to-prepare-PCB-before-applying-HumiSeal-300x224.jpg 300w, https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/How-to-prepare-PCB-before-applying-HumiSeal-768x573.jpg 768w, https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/How-to-prepare-PCB-before-applying-HumiSeal-16x12.jpg 16w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-5617\" class=\"wp-caption-text\">How to prepare PCB before applying HumiSeal<\/figcaption><\/figure>\n<p data-start=\"369\" data-end=\"396\"><strong data-start=\"369\" data-end=\"396\">Remove all contaminants<\/strong><\/p>\n<p data-start=\"398\" data-end=\"464\">After soldering, PCBs often have residues that must be eliminated:<\/p>\n<ul data-start=\"466\" data-end=\"580\">\n<li data-section-id=\"grudff\" data-start=\"466\" data-end=\"510\">Flux residues (especially no-clean flux)<\/li>\n<li data-section-id=\"1ro79zc\" data-start=\"511\" data-end=\"533\">Oils from handling<\/li>\n<li data-section-id=\"ve2lua\" data-start=\"534\" data-end=\"556\">Dust and particles<\/li>\n<li data-section-id=\"1u2hrii\" data-start=\"557\" data-end=\"580\">Ionic contamination<\/li>\n<\/ul>\n<p data-start=\"582\" data-end=\"603\"><strong data-start=\"582\" data-end=\"603\">Cleaning methods:<\/strong><\/p>\n<ul data-start=\"604\" data-end=\"741\">\n<li data-section-id=\"1ncenxm\" data-start=\"604\" data-end=\"652\">Solvent cleaning (IPA or dedicated cleaners)<\/li>\n<li data-section-id=\"tig7fs\" data-start=\"653\" data-end=\"699\">Ultrasonic cleaning for complex assemblies<\/li>\n<li data-section-id=\"mk569l\" data-start=\"700\" data-end=\"741\">Deionized (DI) water cleaning systems<\/li>\n<\/ul>\n<p data-start=\"743\" data-end=\"808\">A clean surface ensures proper adhesion of <a href=\"https:\/\/txjpcba.com\/pt\/revestimento-isolante\/\"><strong data-start=\"786\" data-end=\"807\">Revestimento conformacional<\/strong><\/a>.<\/p>\n<p data-start=\"810\" data-end=\"836\"><strong data-start=\"810\" data-end=\"836\">Dry the PCB completely<\/strong><\/p>\n<p data-start=\"838\" data-end=\"893\">Moisture trapped on the board can cause serious issues:<\/p>\n<ul data-start=\"895\" data-end=\"978\">\n<li data-section-id=\"8yxp40\" data-start=\"895\" data-end=\"920\">Poor coating adhesion<\/li>\n<li data-section-id=\"13j9eof\" data-start=\"921\" data-end=\"946\">Blistering or bubbles<\/li>\n<li data-section-id=\"1gd3q6w\" data-start=\"947\" data-end=\"978\">Corros\u00e3o sob o revestimento<\/li>\n<\/ul>\n<p data-start=\"980\" data-end=\"999\"><strong data-start=\"980\" data-end=\"999\">Best practices:<\/strong><\/p>\n<ul data-start=\"1000\" data-end=\"1137\">\n<li data-section-id=\"173fczi\" data-start=\"1000\" data-end=\"1033\">Air dry or use compressed air<\/li>\n<li data-section-id=\"hds5js\" data-start=\"1034\" data-end=\"1089\">Bake PCB at <strong data-start=\"1048\" data-end=\"1077\">50\u201380\u00b0C for 30\u201360 minutes<\/strong> if needed<\/li>\n<li data-section-id=\"18d50rq\" data-start=\"1090\" data-end=\"1137\">Ensure no moisture remains under components<\/li>\n<\/ul>\n<p data-start=\"1139\" data-end=\"1165\"><strong data-start=\"1139\" data-end=\"1165\">Inspect before coating<\/strong><\/p>\n<p data-start=\"1167\" data-end=\"1223\">Before coating, perform a visual and quality inspection:<\/p>\n<ul data-start=\"1225\" data-end=\"1349\">\n<li data-section-id=\"1t8if68\" data-start=\"1225\" data-end=\"1276\">Check for solder defects (bridges, cold joints)<\/li>\n<li data-section-id=\"10sc3mt\" data-start=\"1277\" data-end=\"1306\">Ensure no residues remain<\/li>\n<li data-section-id=\"cbrtdy\" data-start=\"1307\" data-end=\"1349\">Verify components are properly mounted<\/li>\n<\/ul>\n<p data-start=\"1351\" data-end=\"1422\">Fixing issues after coating is much more difficult in <a href=\"https:\/\/txjpcba.com\/pt\/servicos-de-montagem-de-smt\/\"><strong data-start=\"1405\" data-end=\"1421\">Montagem SMT<\/strong><\/a>.<\/p>\n<p data-start=\"1424\" data-end=\"1447\"><strong data-start=\"1424\" data-end=\"1447\">Mask critical areas<\/strong><\/p>\n<p data-start=\"1449\" data-end=\"1482\">Certain areas must not be coated:<\/p>\n<ul data-start=\"1484\" data-end=\"1571\">\n<li data-section-id=\"e14603\" data-start=\"1484\" data-end=\"1516\">Connectors and edge contacts<\/li>\n<li data-section-id=\"1ebxk1\" data-start=\"1517\" data-end=\"1532\">Test points<\/li>\n<li data-section-id=\"1hkemm2\" data-start=\"1533\" data-end=\"1571\">Switches and mechanical interfaces<\/li>\n<\/ul>\n<p data-start=\"1573\" data-end=\"1664\">Use masking tape, boots, or removable latex to protect these zones during <a href=\"https:\/\/txjpcba.com\/pt\/montagem-de-placas-de-circuito-impresso\/\"><strong data-start=\"1647\" data-end=\"1663\">Montagem de PCB<\/strong><\/a>.<\/p>\n<p data-start=\"1666\" data-end=\"1715\"><strong data-start=\"1666\" data-end=\"1715\">Surface activation (optional but recommended)<\/strong><\/p>\n<p data-start=\"1717\" data-end=\"1751\">For high-reliability applications:<\/p>\n<ul data-start=\"1753\" data-end=\"1894\">\n<li data-section-id=\"cl9y56\" data-start=\"1753\" data-end=\"1802\">Use plasma cleaning to improve surface energy<\/li>\n<li data-section-id=\"12f7tkr\" data-start=\"1803\" data-end=\"1832\">Enhances coating adhesion<\/li>\n<li data-section-id=\"1e9ci\" data-start=\"1833\" data-end=\"1894\">Common in aerospace and automotive <a href=\"https:\/\/txjpcba.com\/pt\/montagem-de-pcb-turnkey\/\"><strong data-start=\"1870\" data-end=\"1894\">Montagem de PCB pronta para uso<\/strong><\/a><\/li>\n<\/ul>\n<p data-start=\"1896\" data-end=\"1932\"><strong data-start=\"1896\" data-end=\"1932\">Control handling and environment<\/strong><\/p>\n<ul data-start=\"1934\" data-end=\"2063\">\n<li data-section-id=\"1rutv9s\" data-start=\"1934\" data-end=\"1971\">Wear gloves to avoid fingerprints<\/li>\n<li data-section-id=\"9ejynw\" data-start=\"1972\" data-end=\"2014\">Work in a clean, dust-free environment<\/li>\n<li data-section-id=\"bby0o5\" data-start=\"2015\" data-end=\"2063\">Maintain controlled humidity and temperature<\/li>\n<\/ul>\n<p data-start=\"2065\" data-end=\"2126\">Contamination during handling can compromise coating quality.<\/p>\n<p data-start=\"2128\" data-end=\"2157\"><strong data-start=\"2128\" data-end=\"2157\">Final readiness checklist<\/strong><\/p>\n<p data-start=\"2159\" data-end=\"2184\">Before applying HumiSeal:<\/p>\n<ul data-start=\"2186\" data-end=\"2355\">\n<li data-section-id=\"m0dyhg\" data-start=\"2186\" data-end=\"2225\">PCB is clean and contamination-free<\/li>\n<li data-section-id=\"u1njja\" data-start=\"2226\" data-end=\"2264\">Fully dry with no trapped moisture<\/li>\n<li data-section-id=\"1oikaa0\" data-start=\"2265\" data-end=\"2297\">Masking is correctly applied<\/li>\n<li data-section-id=\"1rq4hup\" data-start=\"2298\" data-end=\"2325\">Inspection is completed<\/li>\n<li data-section-id=\"1ope9t9\" data-start=\"2326\" data-end=\"2355\">Environment is controlled<\/li>\n<\/ul>\n<p data-start=\"2357\" data-end=\"2371\"><strong data-start=\"2357\" data-end=\"2371\">Conclus\u00e3o<\/strong><\/p>\n<p data-start=\"2373\" data-end=\"2637\">Preparing the PCB properly is essential for successful HumiSeal coating. In <strong data-start=\"2449\" data-end=\"2465\">Montagem de PCB<\/strong>, <strong data-start=\"2467\" data-end=\"2483\">Montagem SMT<\/strong>, e <strong data-start=\"2489\" data-end=\"2513\">Montagem de PCB pronta para uso<\/strong>, thorough cleaning, drying, inspection, and masking ensure strong adhesion, reliable protection, and long-term performance.<\/p>\n<p data-start=\"2373\" data-end=\"2637\">We support HumiSeal and equivalent conformal coating solutions for your PCBA projects.<\/p>\n<div style=\"background: #f8f8f8; border: 1px solid #e5e5e5; padding: 25px; margin-top: 30px; border-radius: 6px;\">\n<div style=\"text-align: center;\">\n<h3 style=\"margin-bottom: 10px; font-size: 22px;\">Obter uma cota\u00e7\u00e3o de revestimento isolante<\/h3>\n<p style=\"font-size: 15px; color: #555; margin-bottom: 15px;\">Tem d\u00favidas sobre o revestimento isolante para sua placa de circuito impresso? 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--><\/div>\n<p style=\"font-size: 13px; color: #888; margin-top: 15px; text-align: center;\">Shenzhen Tengxinjie Electronics Co., Ltd.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>PCB before applying HumiSeal Proper PCB preparation is the most critical step before applying HumiSeal conformal coating, produced by Chase 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