{"id":1644,"date":"2021-10-18T08:05:02","date_gmt":"2021-10-18T01:05:02","guid":{"rendered":"https:\/\/dk-metalsurfacetreatment.com\/?p=1644"},"modified":"2026-04-20T16:21:32","modified_gmt":"2026-04-20T09:21:32","slug":"iron-phosphating-passivation","status":"publish","type":"post","link":"https:\/\/dk-metalsurfacetreatment.com\/en\/iron-phosphating-passivation\/","title":{"rendered":"Iron Phosphating Passivation"},"content":{"rendered":"<ul>\n<li style=\"text-align: justify;\"><strong>Upgrade your iron phosphating process in compliance with Qualisteelcoat standards<\/strong><\/li>\n<li style=\"text-align: justify;\"><strong>Passivation that can be easily added in the last demi-rinse bath<\/strong><\/li>\n<li style=\"text-align: justify;\"><strong>Improved corrosion protection and paint adhesion properties<\/strong><\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><strong>PreCoat ADL-4p Passivation for iron phosphating is a hexavalent chrome free passivation treatment that can be used to upgrade the quality of chemical treatment in traditional iron phospahting processes. It as added to the last demi-rinse bath. PreCoat improves corrosion resistance and paint adhesion properties.<\/strong><\/p>\n<p style=\"text-align: justify;\">AD Chemicals has built a reputation for innovation and product improvement and has developed a range of additive products for the phosphating process based on trivalent chromium and polymers. PreCoat ADL-4P is one of these developments, making traditional iron phosphating processes more robust.<\/p>\n<p style=\"text-align: justify;\">PreCoat ADL-4P Passivation for iron phosphating process<\/p>\n<p style=\"text-align: justify;\">PreCoat is a passivation based on trivalent chromium and is added to the last demi-rinse bath of an iron phsopating process. It creates a passivaiton layer on the metal surface that significantly improves adhesion and corrosion resistance of the finished product.<\/p>\n<p style=\"text-align: justify;\">PreCoat is tested according to Qualisteelcoat standards as well as extensive laboratory tests on test pieces treated at customer processing lines to demonstrate the effectiveness of PreCoat ADL-4P.<\/p>\n<h2 style=\"text-align: justify;\"><strong>Laboratory tests passivation PreCoat ADL-4P<\/strong><\/h2>\n<p style=\"text-align: justify;\">Test set up passivation PreCoat ADL-4P Panels with and without PreCoat where treated at the same time by a spraying iron phosphate line (spray).<\/p>\n<ul style=\"text-align: justify;\">\n<li>3 minutes of phosphating, 3 minutes of rinsing<\/li>\n<li>The bath used for rinsing was relatively clean (having a conductivity of 300 \u03bcS).<\/li>\n<li>Half of the panels where sequently treated by misting with PreCoat ADL-4P (bath solution).<\/li>\n<li>Afterwards all panels were coated<\/li>\n<\/ul>\n<p style=\"text-align: justify;\">Next step was 500 hours salt spray testing (ASTM B117) in compliance with\u00a0 Qualisteelcoat standards <img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-1638 size-full\" src=\"https:\/\/dk-metalsurfacetreatment.com\/wp-content\/uploads\/2021\/10\/test-500.png\" alt=\"\" width=\"1030\" height=\"579\" \/> Line set up, dipping\/spraying line<\/p>\n<h2 style=\"text-align: justify;\">A common line set up for iron phosphating is a process with 7 baths. See in below image where Passivation ADl-4p is added. The product can also be added to the last rinsing bath of 3 stage iron phosphating processes. Suitable for dipping and spraying lines. <img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-1640 size-full\" src=\"https:\/\/dk-metalsurfacetreatment.com\/wp-content\/uploads\/2021\/10\/line-set-up.png\" alt=\"\" width=\"1030\" height=\"579\" \/> PreCoat ADL-4P \u2013 The smart upgrade and replacement for iron phosphating<\/h2>\n<p style=\"text-align: justify;\">When combined with\u00a0<strong>Cleaner Neutral<\/strong>,\u00a0<strong>PreCoat ADL-4P<\/strong>\u00a0provides an excellent alternative to traditional iron phosphating processes. This hexavalent chromium-free passivation is added to the final demineralized rinse stage and significantly improves both corrosion resistance and paint adhesion. Even existing phosphating lines can benefit from PreCoat ADL-4P as an\u00a0<strong>upgrade<\/strong>, enhancing performance and sustainability in line with standards such as Qualisteelcoat.<\/p>\n<h2 style=\"text-align: justify;\">Exceeding the market standard<\/h2>\n<p style=\"text-align: justify;\">With PreCoat ADL-4P AD Chemicals proves the traditional market standard of iron phosphating process can be exceeded. PreCoat is economical and quality wise a solid upgrade that could benefit almost every iron phosphating process.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Upgrade your iron phosphating process in compliance with Qualisteelcoat standards Passivation that can be easily added in the last demi-rinse bath Improved corrosion protection and paint adhesion properties PreCoat ADL-4p Passivation for iron phosphating is a hexavalent chrome free passivation treatment that can be used to upgrade the quality of chemical treatment in traditional iron<\/p>\n","protected":false},"author":3,"featured_media":2295,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[39,24],"tags":[],"class_list":["post-1644","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-general-industry-steel-en","category-products"],"_links":{"self":[{"href":"https:\/\/dk-metalsurfacetreatment.com\/en\/wp-json\/wp\/v2\/posts\/1644","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dk-metalsurfacetreatment.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dk-metalsurfacetreatment.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dk-metalsurfacetreatment.com\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/dk-metalsurfacetreatment.com\/en\/wp-json\/wp\/v2\/comments?post=1644"}],"version-history":[{"count":6,"href":"https:\/\/dk-metalsurfacetreatment.com\/en\/wp-json\/wp\/v2\/posts\/1644\/revisions"}],"predecessor-version":[{"id":2297,"href":"https:\/\/dk-metalsurfacetreatment.com\/en\/wp-json\/wp\/v2\/posts\/1644\/revisions\/2297"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dk-metalsurfacetreatment.com\/en\/wp-json\/wp\/v2\/media\/2295"}],"wp:attachment":[{"href":"https:\/\/dk-metalsurfacetreatment.com\/en\/wp-json\/wp\/v2\/media?parent=1644"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dk-metalsurfacetreatment.com\/en\/wp-json\/wp\/v2\/categories?post=1644"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dk-metalsurfacetreatment.com\/en\/wp-json\/wp\/v2\/tags?post=1644"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}