{"id":5049,"date":"2026-04-09T11:38:36","date_gmt":"2026-04-09T03:38:36","guid":{"rendered":"https:\/\/txjpcba.com\/?p=5049"},"modified":"2026-04-09T11:38:36","modified_gmt":"2026-04-09T03:38:36","slug":"what-is-pcb-cleaning-before-coating","status":"publish","type":"post","link":"https:\/\/txjpcba.com\/fr\/what-is-pcb-cleaning-before-coating\/","title":{"rendered":"What is PCB cleaning before coating?"},"content":{"rendered":"<h2 data-section-id=\"1fklgfs\" data-start=\"0\" data-end=\"52\"><span role=\"text\">PCB cleaning before <strong data-start=\"31\" data-end=\"52\">Rev\u00eatement<\/strong><\/span><\/h2>\n<p data-start=\"54\" data-end=\"301\">PCB cleaning before <a href=\"https:\/\/txjpcba.com\/fr\/revetement-conforme\/\"><strong data-start=\"74\" data-end=\"95\">Rev\u00eatement conforme<\/strong><\/a> is a critical preparation step in <strong data-start=\"130\" data-end=\"146\">Assemblage du circuit imprim\u00e9<\/strong> et <strong data-start=\"151\" data-end=\"167\">Assemblage SMT<\/strong>. It involves removing contaminants from the circuit board surface to ensure proper adhesion and long-term reliability of the coating.<\/p>\n<figure id=\"attachment_5050\" aria-describedby=\"caption-attachment-5050\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-5050\" src=\"https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/What-is-PCB-cleaning-before-coating.jpg\" alt=\"What is PCB cleaning before coating\" width=\"800\" height=\"597\" srcset=\"https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/What-is-PCB-cleaning-before-coating.jpg 800w, https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/What-is-PCB-cleaning-before-coating-300x224.jpg 300w, https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/What-is-PCB-cleaning-before-coating-768x573.jpg 768w, https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/What-is-PCB-cleaning-before-coating-16x12.jpg 16w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-5050\" class=\"wp-caption-text\">What is PCB cleaning before coating<\/figcaption><\/figure>\n<h3 data-section-id=\"vow39k\" data-start=\"303\" data-end=\"336\">Why PCB cleaning is important<\/h3>\n<p data-start=\"338\" data-end=\"413\">Pendant <strong data-start=\"345\" data-end=\"361\">Assemblage du circuit imprim\u00e9<\/strong>, various residues can remain on the board, such as:<\/p>\n<ul data-start=\"415\" data-end=\"553\">\n<li data-section-id=\"1wkfhio\" data-start=\"415\" data-end=\"447\">Flux residues from soldering<\/li>\n<li data-section-id=\"n6udew\" data-start=\"448\" data-end=\"491\">Dust and particles from the environment<\/li>\n<li data-section-id=\"q5fdom\" data-start=\"492\" data-end=\"530\">Oils or fingerprints from handling<\/li>\n<li data-section-id=\"1duj7kv\" data-start=\"531\" data-end=\"553\">Ionic contaminants<\/li>\n<\/ul>\n<p data-start=\"555\" data-end=\"656\">If these contaminants are not removed, the <strong data-start=\"598\" data-end=\"619\">Rev\u00eatement conforme<\/strong> may not adhere properly, leading to:<\/p>\n<ul data-start=\"658\" data-end=\"786\">\n<li data-section-id=\"134oslu\" data-start=\"658\" data-end=\"685\">Delamination or peeling<\/li>\n<li data-section-id=\"b2sso4\" data-start=\"686\" data-end=\"720\">Reduced insulation performance<\/li>\n<li data-section-id=\"1gd3q6w\" data-start=\"721\" data-end=\"752\">Corrosion under the coating<\/li>\n<li data-section-id=\"ovoxln\" data-start=\"753\" data-end=\"786\">Electrical leakage or failure<\/li>\n<\/ul>\n<p data-start=\"788\" data-end=\"870\">Proper cleaning ensures the coating forms a uniform and reliable protective layer.<\/p>\n<h3 data-section-id=\"st4utv\" data-start=\"872\" data-end=\"903\">Common PCB cleaning methods<\/h3>\n<h4 data-start=\"905\" data-end=\"926\">Solvent cleaning<\/h4>\n<p data-start=\"928\" data-end=\"1004\">Solvent cleaning uses chemical solvents to dissolve and remove contaminants.<\/p>\n<ul data-start=\"1006\" data-end=\"1154\">\n<li data-section-id=\"cacpmk\" data-start=\"1006\" data-end=\"1045\">Fast and effective for flux removal<\/li>\n<li data-section-id=\"1ir06p7\" data-start=\"1046\" data-end=\"1109\">Suitable for small to medium production in <strong data-start=\"1091\" data-end=\"1107\">Assemblage SMT<\/strong><\/li>\n<li data-section-id=\"12eg9bd\" data-start=\"1110\" data-end=\"1154\">Requires proper handling and ventilation<\/li>\n<\/ul>\n<h4 data-start=\"1156\" data-end=\"1191\">Aqueous (water-based) cleaning<\/h4>\n<p data-start=\"1193\" data-end=\"1246\">Aqueous cleaning uses water combined with detergents.<\/p>\n<ul data-start=\"1248\" data-end=\"1371\">\n<li data-section-id=\"5h2fhd\" data-start=\"1248\" data-end=\"1283\">Environmentally friendly option<\/li>\n<li data-section-id=\"126gv6n\" data-start=\"1284\" data-end=\"1330\">Effective for removing ionic contamination<\/li>\n<li data-section-id=\"g13ja8\" data-start=\"1331\" data-end=\"1371\">Requires rinsing and thorough drying<\/li>\n<\/ul>\n<p data-start=\"1373\" data-end=\"1433\">This method is widely used in modern <strong data-start=\"1410\" data-end=\"1426\">Assemblage du circuit imprim\u00e9<\/strong> lines.<\/p>\n<h4 data-start=\"1435\" data-end=\"1459\">Ultrasonic cleaning<\/h4>\n<p data-start=\"1461\" data-end=\"1534\">Ultrasonic cleaning uses high-frequency sound waves in a liquid solution.<\/p>\n<ul data-start=\"1536\" data-end=\"1676\">\n<li data-section-id=\"1r1g9b7\" data-start=\"1536\" data-end=\"1585\">Removes contaminants from hard-to-reach areas<\/li>\n<li data-section-id=\"1h7wwsx\" data-start=\"1586\" data-end=\"1634\">Ideal for complex and densely populated PCBs<\/li>\n<li data-section-id=\"7b5q3a\" data-start=\"1635\" data-end=\"1676\">Used for high-reliability electronics<\/li>\n<\/ul>\n<h4 data-start=\"1678\" data-end=\"1698\">Manual cleaning<\/h4>\n<p data-start=\"1700\" data-end=\"1755\">Manual cleaning is done using brushes, wipes, or swabs.<\/p>\n<ul data-start=\"1757\" data-end=\"1853\">\n<li data-section-id=\"awgnh8\" data-start=\"1757\" data-end=\"1797\">Suitable for rework or small batches<\/li>\n<li data-section-id=\"et26fd\" data-start=\"1798\" data-end=\"1823\">Low cost and flexible<\/li>\n<li data-section-id=\"wrnyhh\" data-start=\"1824\" data-end=\"1853\">Depends on operator skill<\/li>\n<\/ul>\n<h3 data-section-id=\"noup9k\" data-start=\"1855\" data-end=\"1880\">Drying after cleaning<\/h3>\n<p data-start=\"1882\" data-end=\"1964\">After cleaning, PCBs must be completely dry before applying <strong data-start=\"1942\" data-end=\"1963\">Rev\u00eatement conforme<\/strong>.<\/p>\n<ul data-start=\"1966\" data-end=\"2057\">\n<li data-section-id=\"4bkiuo\" data-start=\"1966\" data-end=\"2006\">Use hot air ovens or drying chambers<\/li>\n<li data-section-id=\"1qdh34l\" data-start=\"2007\" data-end=\"2057\">Ensure no moisture is trapped under components<\/li>\n<\/ul>\n<p data-start=\"2059\" data-end=\"2126\">Moisture left on the board can cause corrosion and coating defects.<\/p>\n<h3 data-section-id=\"o7mc4l\" data-start=\"2128\" data-end=\"2153\">Cleanliness standards<\/h3>\n<p data-start=\"2155\" data-end=\"2230\">To ensure quality in <a href=\"https:\/\/txjpcba.com\/fr\/services-dassemblage-smt\/\"><strong data-start=\"2176\" data-end=\"2192\">Assemblage SMT<\/strong><\/a>, cleanliness is often verified using:<\/p>\n<ul data-start=\"2232\" data-end=\"2371\">\n<li data-section-id=\"pg7ege\" data-start=\"2232\" data-end=\"2281\">Ionic contamination testing (e.g., ROSE test)<\/li>\n<li data-section-id=\"13qi92v\" data-start=\"2282\" data-end=\"2323\">Visual inspection under magnification<\/li>\n<li data-section-id=\"s8aiup\" data-start=\"2324\" data-end=\"2371\">Surface insulation resistance (SIR) testing<\/li>\n<\/ul>\n<p data-start=\"2373\" data-end=\"2423\">These checks confirm the PCB is ready for coating.<\/p>\n<h3 data-section-id=\"8ep03t\" data-start=\"2425\" data-end=\"2445\">Conclusion finale<\/h3>\n<p data-start=\"2447\" data-end=\"2778\">PCB cleaning before <strong data-start=\"2467\" data-end=\"2488\">Rev\u00eatement conforme<\/strong> is essential to remove contaminants and ensure strong adhesion, electrical reliability, and long-term protection. In <strong data-start=\"2606\" data-end=\"2622\">Assemblage du circuit imprim\u00e9<\/strong> et <strong data-start=\"2627\" data-end=\"2643\">Assemblage SMT<\/strong>, proper cleaning and drying directly determine the effectiveness of the coating and the overall performance of the electronic product.<\/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;\">Obtenir un devis pour un rev\u00eatement conforme<\/h3>\n<p style=\"font-size: 15px; color: #555; margin-bottom: 15px;\">Besoin d'une assistance professionnelle pour le rev\u00eatement conforme ? 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