{"id":58534,"date":"2026-02-10T12:47:42","date_gmt":"2026-02-10T11:47:42","guid":{"rendered":"https:\/\/www.proquimia.com\/?p=58534"},"modified":"2026-02-10T10:37:36","modified_gmt":"2026-02-10T09:37:36","slug":"nanotechnology-phosphatation-metal-surface-treatment","status":"publish","type":"post","link":"https:\/\/www.proquimia.com\/en\/nanotechnology-phosphatation-metal-surface-treatment\/","title":{"rendered":"Next-generation nanotechnology processes for the pre-treatment of metal surfaces prior to painting."},"content":{"rendered":"\r\n<div class=\"vce-row-container\" data-vce-boxed-width=\"true\">\r\n<div id=\"el-fef985fc\" class=\"vce-row vce-row--col-gap-30 vce-row-equal-height vce-row-content--top\" data-vce-do-apply=\"all el-fef985fc\">\r\n<div class=\"vce-row-content\" data-vce-element-content=\"true\">\r\n\r\n\r\n<div id=\"el-2b548938\" class=\"vce-col vce-col--md-auto vce-col--xs-1 vce-col--xs-last vce-col--xs-first vce-col--sm-last vce-col--sm-first vce-col--md-last vce-col--lg-last vce-col--xl-last vce-col--md-first vce-col--lg-first vce-col--xl-first\">\r\n<div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background el-2b548938\">\r\n<div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-2b548938\">\r\n\r\n\r\n<div class=\"vce-text-block\">\r\n<div id=\"el-4d3b37b3\" class=\"vce-text-block-wrapper vce\" data-vce-do-apply=\"all el-4d3b37b3\">\r\n<h2>Background: What is phosphating?<\/h2>\r\nOne of the earliest technologies developed and still most widely used for the treatment of metal surfaces prior to painting is phosphating. Phosphating is an industrial process widely used as a chemical pretreatment to protect metal surfaces. It consists of the formation of a surface conversion layer of metal phosphate, generally based on iron (amorphous phosphating) and\/or zinc. The layers formed have a dual function: passivation through an oxygen barrier effect, which limits metal corrosion, and promotion of adhesion for subsequent coatings such as paints.\r\n\r\nAmorphous (iron) phosphating offers ease of application, simple process control, and performance suitable for materials exposed to low-to-medium corrosive environments.\r\n\r\nZinc phosphating, on the other hand, is a more complex treatment process designed to achieve the highest performance levels, even in highly corrosive environments. This technology is widely used in numerous industries, including automotive, automotive supply chain, coil coating, and household appliances. However, it involves a greater number of process stages, strict control requirements, the formation of sludge containing heavy metals, scale build-up in equipment, frequent maintenance operations, high water consumption, and significant energy use for heating the treatment baths.\r\n\r\n<\/div>\r\n<\/div>\r\n\r\n<div class=\"vce-single-image-container vce-single-image--align-left\">\r\n<div id=\"el-d2ac23ac\" class=\"vce vce-single-image-wrapper\" data-vce-do-apply=\"all el-d2ac23ac\">\r\n<figure>\r\n<div class=\"vce-single-image-figure-inner\" style=\"width: 1200px;\">\r\n<div class=\"vce-single-image-inner vce-single-image--absolute\" style=\"width: 100%; padding-bottom: 66.6667%;\"><img loading=\"lazy\" decoding=\"async\" class=\"vce-single-image\" title=\"Tratamiento de superficies met\u00e1licas en l\u00ednea industrial automatizada\" src=\"https:\/\/www.proquimia.com\/wp-content\/uploads\/tratamiento-superficies-metalicas-linea-industrial.webp-1200x800.webp\" srcset=\"https:\/\/www.proquimia.com\/wp-content\/uploads\/tratamiento-superficies-metalicas-linea-industrial.webp-1200x800.webp 1200w, https:\/\/www.proquimia.com\/wp-content\/uploads\/tratamiento-superficies-metalicas-linea-industrial.webp-320x213.webp 320w, https:\/\/www.proquimia.com\/wp-content\/uploads\/tratamiento-superficies-metalicas-linea-industrial.webp-480x320.webp 480w, https:\/\/www.proquimia.com\/wp-content\/uploads\/tratamiento-superficies-metalicas-linea-industrial.webp-800x533.webp 800w, https:\/\/www.proquimia.com\/wp-content\/uploads\/tratamiento-superficies-metalicas-linea-industrial.webp-2400x1600.webp 2x\" alt=\"L\u00ednea industrial automatizada para el tratamiento de superficies met\u00e1licas antes del pintado\" width=\"1200\" height=\"800\" data-img-src=\"https:\/\/www.proquimia.com\/wp-content\/uploads\/tratamiento-superficies-metalicas-linea-industrial.webp.webp\" data-attachment-id=\"58148\" \/><\/div>\r\n<\/div>\r\n<figcaption hidden=\"\"><\/figcaption><\/figure>\r\n<\/div>\r\n<\/div>\r\n\r\n\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n\r\n\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n\r\n<div class=\"vce-row-container\" data-vce-boxed-width=\"true\">\r\n<div id=\"el-7c5b0f63\" class=\"vce-row vce-row--col-gap-30 vce-row-equal-height vce-row-content--top\" data-vce-do-apply=\"all el-7c5b0f63\">\r\n<div class=\"vce-row-content\" data-vce-element-content=\"true\">\r\n\r\n\r\n<div id=\"el-3d92d7e0\" class=\"vce-col vce-col--md-auto vce-col--xs-1 vce-col--xs-last vce-col--xs-first vce-col--sm-last vce-col--sm-first vce-col--md-last vce-col--lg-last vce-col--xl-last vce-col--md-first vce-col--lg-first vce-col--xl-first\">\r\n<div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background el-3d92d7e0\">\r\n<div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-3d92d7e0\">\r\n\r\n\r\n<div class=\"vce-text-block\">\r\n<div id=\"el-222668db\" class=\"vce-text-block-wrapper vce\" data-vce-do-apply=\"all el-222668db\">\r\n<h2>Alternative technologies to amorphous phosphating: first-generation nanotechnology processes<\/h2>\r\nAt PROQUIMIA, for more than 20 years, there has been a strong commitment to the research and development of conversion technologies that are alternatives to phosphating, are more environmentally friendly, technically and economically viable, and capable of delivering corrosion resistance and paint adhesion performance comparable to phosphate coatings.\r\n\r\nWith the implementation of the first generation of nanotechnology conversion coatings developed\u00a0 the CONVERCOAT range mainly based on zirconium ceramic oxide deposition technology, significant process savings have been achieved in terms of energy and water consumption, together with reduced maintenance requirements and lower environmental impact, while maintaining anticorrosion performance equal to or higher than that of amorphous phosphating.\r\n\r\nHowever, when anticorrosion performance is compared with that obtained using traditional zinc phosphating technology, the same performance level is not yet achieved.\r\n\r\n<\/div>\r\n<\/div>\r\n\r\n\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n\r\n\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n\r\n<div class=\"vce-row-container\" data-vce-boxed-width=\"true\">\r\n<div id=\"el-23c0cca1\" class=\"vce-row vce-row--col-gap-30 vce-row-equal-height vce-row-content--top\" data-vce-do-apply=\"all el-23c0cca1\">\r\n<div class=\"vce-row-content\" data-vce-element-content=\"true\">\r\n\r\n\r\n<div id=\"el-351a0b54\" class=\"vce-col vce-col--md-auto vce-col--xs-1 vce-col--xs-last vce-col--xs-first vce-col--sm-last vce-col--sm-first vce-col--md-last vce-col--lg-last vce-col--xl-last vce-col--md-first vce-col--lg-first vce-col--xl-first\">\r\n<div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background el-351a0b54\">\r\n<div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-351a0b54\">\r\n\r\n\r\n<div class=\"vce-text-block\">\r\n<div id=\"el-31490031\" class=\"vce-text-block-wrapper vce\" data-vce-do-apply=\"all el-31490031\">\r\n<h2>Can nanotechnology processes match the anticorrosion performance of zinc phosphating?<\/h2>\r\nThe challenge has been set: to match the performance level of zinc phosphating by developing a second generation of nanotechnology products while retaining the benefits of this technology.\r\n\r\nAs a result of this need and the continuous improvement philosophy of PROQUIMIA, the R&amp;D&amp;I project called NACAR (High-Performance NanoCoatings) has been carried out over the past two years. The project was co-funded by the CDTI and the FEDER under file number IDI-20220983. It enabled the development of a new-generation nanotechnology process, named CONVERCOAT NT, designed for multi-metal treatments in 3- and 5-stage spray lines as well as immersion lines.\r\n\r\nThe CONVERCOAT NT process incorporates cathodic nucleation agents as well as organic and inorganic accelerators, enabling the formation of a conversion layer that is more compact and thicker than those obtained with first-generation nanotechnology processes, thereby delivering excellent anticorrosion performance and paint adhesion.\r\n\r\n<\/div>\r\n<\/div>\r\n\r\n\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n\r\n\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n\r\n<div class=\"vce-row-container\" data-vce-boxed-width=\"true\">\r\n<div id=\"el-65e3cae8\" class=\"vce-row vce-row--col-gap-30 vce-row-equal-height vce-row-content--top\" data-vce-do-apply=\"all el-65e3cae8\">\r\n<div class=\"vce-row-content\" data-vce-element-content=\"true\">\r\n\r\n\r\n<div id=\"el-f1e2a3d6\" class=\"vce-col vce-col--md-auto vce-col--xs-1 vce-col--xs-last vce-col--xs-first vce-col--sm-last vce-col--sm-first vce-col--md-last vce-col--lg-last vce-col--xl-last vce-col--md-first vce-col--lg-first vce-col--xl-first\">\r\n<div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background el-f1e2a3d6\">\r\n<div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-f1e2a3d6\">\r\n\r\n\r\n<div class=\"vce-text-block\">\r\n<div id=\"el-2c992c7f\" class=\"vce-text-block-wrapper vce\" data-vce-do-apply=\"all el-2c992c7f\">\r\n<h2>Confocal and interferometric microscopy performed on a steel panel treated with CONVERCOAT NT<\/h2>\r\nSpecifically, in 5-stage multi-metal lines, implementation of the CONVERCOAT NT process has significantly increased the corrosion resistance of the substrate\u2013treatment\u2013paint system, achieving an improvement of one corrosivity category according to ISO 12944.\r\n<table width=\"512\">\r\n<tbody>\r\n<tr>\r\n<td width=\"77\">&nbsp;<\/td>\r\n<td width=\"199\"><strong>CONVERCOAT 1st generation + single-coat polyester paint<\/strong><\/td>\r\n<td width=\"236\"><strong>5 stage process with CONVERCOAT NT + single-coat polyester paint<\/strong><\/td>\r\n<\/tr>\r\n<tr>\r\n<td width=\"77\"><strong>Steel<\/strong><\/td>\r\n<td width=\"199\">Achieved category: C3H<\/td>\r\n<td width=\"236\">Achieved category: C4H<\/td>\r\n<\/tr>\r\n<tr>\r\n<td width=\"77\"><strong>Aluminium<\/strong><\/td>\r\n<td width=\"199\">Achieved category: C3H<\/td>\r\n<td width=\"236\">Achieved category: C5H<\/td>\r\n<\/tr>\r\n<tr>\r\n<td width=\"77\"><strong>HDG<\/strong><\/td>\r\n<td width=\"199\">Achieved category: C4H<\/td>\r\n<td width=\"236\">Achieved category: C5H<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<strong>Classification of corrosivity categories according to ISO 12944-2<\/strong>\r\n\r\nTherefore, the newly developed CONVERCOAT NT process makes it possible to match the anticorrosion performance levels achieved with zinc phosphating, while operating at low temperatures (35\u201345 \u00b0C) and significantly reducing sludge formation and scale build-up in equipment.\r\n\r\nWith more than 50 years of experience in the field of metal surface treatment, PROQUIMIA provides a comprehensive service covering the study, design, and implementation of metal surface treatment processes tailored to the specific needs of each project.\r\n\r\n<\/div>\r\n<\/div>\r\n\r\n\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n\r\n\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n\n","protected":false},"excerpt":{"rendered":"<p>Background: What is phosphating? One of the earliest technologies developed and still most widely used for the treatment of metal surfaces prior to painting is phosphating. Phosphating is an industrial process widely used as a chemical pretreatment to protect metal surfaces. It consists of the formation of a surface conversion layer of metal phosphate, generally [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":58150,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[77],"tags":[],"sector":[],"country":[],"ppma_author":[624],"class_list":["post-58534","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-proquimia"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Metal pretreatment: phosphatation and nanotechnology<\/title>\n<meta name=\"description\" content=\"Nanotechnology and phosphatation to protect metal surfaces with greater durability and lower environmental impact.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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