{"id":1884,"date":"2023-03-15T10:12:31","date_gmt":"2023-03-15T10:12:31","guid":{"rendered":"https:\/\/www.surgicalholdings.co.uk\/blog\/?p=1884"},"modified":"2023-04-23T17:15:06","modified_gmt":"2023-04-23T17:15:06","slug":"what-is-passivation","status":"publish","type":"post","link":"https:\/\/www.surgicalholdings.co.uk\/blog\/2023\/03\/what-is-passivation\/","title":{"rendered":"What is Passivation?"},"content":{"rendered":"\n<p>This week Surgical Holdings <a href=\"https:\/\/www.linkedin.com\/in\/dan-coole-41660815\/?originalSubdomain=uk\" target=\"_blank\" rel=\"noreferrer noopener\">Managing Director Dan Coole<\/a> has spoken to <a href=\"https:\/\/www.linkedin.com\/company\/beyondclean-uk\/?originalSubdomain=uk\" target=\"_blank\" rel=\"noreferrer noopener\">Beyond Clean UK<\/a> about the topic of passivation as part of their Expert Series. Instrument Repair expert Dan, also chairs the Surgical Instrument Special Interest Section at the <a href=\"https:\/\/www.abhi.org.uk\/\" target=\"_blank\" rel=\"noreferrer noopener\">Association of British HealthTech Industries (ABHI)<\/a><\/p>\n\n\n\n<p><strong>So, what is passivation?<\/strong><br>It\u2019s a term we hear a lot in relation to surgical instruments. Being \u2018passive\u2019 is essentially sitting back and not reacting, and that\u2019s what we want from stainless steels we\u2019re using for instrument manufacture. In order to achieve this, we need a passive surface. Passivation is a natural phenomenon occurring between Chromium in stainless steel and Oxygen. Oxygen in the ambient air reacts with the Chromium, creating a Chromium Oxide passive layer. This layer is only between 1-3 Nm (Nanometres) thick initially but is thought to thicken over time. Natural passivation takes around 48 hours, assuming there are no contaminants or free Iron on the surface of the steel.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.surgicalholdings.co.uk\/blog\/wp-content\/uploads\/2023\/03\/Release-3-BCUK-Dan-Coole-Tray-Refurbishment-Expert-Series&#x2122;-1-copy.jpg\"><img decoding=\"async\" src=\"https:\/\/www.surgicalholdings.co.uk\/blog\/wp-content\/uploads\/2023\/03\/Release-3-BCUK-Dan-Coole-Tray-Refurbishment-Expert-Series&#x2122;-1-copy-791x1024.jpg\" alt=\"\" class=\"wp-image-1885\"\/><\/a><\/figure>\n\n\n\n<p>In manufacture and repair of instruments, we can artificially create this reaction by treating the stainless steel with a chemical (normally an acid). This process takes around 30 minutes normally, a great improvement on 48 hours! Acid passivation will generally remove surface contaminants, free Iron and create the passive layer. BS 5194 (British standards series for surgical instruments) recommends that passivation should take place through acid treatment or electropolishing. Manufacturers and repair companies accredited to ISO 13485 who are using passivation, are expected to have performed validation to prove their process is effective.<\/p>\n\n\n\n<p>Although the newly established passive layer is chemically stable, it is susceptible to damage, through factors such as handling, usage, chemical damage, water damage, laser marking and repair work. Repair work, such as sharpening, interferes with the passive layer of the stainless steel. This is why it\u2019s important to re-passivate after repair work is carried out, wherever possible; particularly if the instrument has been laser marked, although some in-situ chemical treatments may be used to oxidise laser marking. The consequence of not passivating after repair may be that free Iron from the disturbed surface of the steel reacts with Oxygen, causing rust &#8211; not what we want from a repaired device!<\/p>\n\n\n\n<p><br>This 3-page PDF resource is available for download here: <a href=\"https:\/\/lnkd.in\/eVyYbk_H\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/lnkd.in\/eVyYbk_H<\/a><\/p>\n\n\n\n<p><br>Dan is also speaking at the <a href=\"https:\/\/lnkd.in\/e8yr-BYP\" target=\"_blank\" rel=\"noreferrer noopener\">Beyond Clean UK\u2019s inaugural conference, \u2018Through the Looking Glass\u2019<\/a> taking place on 31 March, 2023. More details on this free event coming soon\u2026.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Surgical Holdings Managing Director Dan Coole has spoken to Beyond Clean UK about the topic of passivation as part of their Expert Series. <\/p>\n<a class=\"btn-blue l-blog-post-readmore\" href=\"https:\/\/www.surgicalholdings.co.uk\/blog\/2023\/03\/what-is-passivation\/\" title=\"Read more\">Read more<\/a>","protected":false},"author":12,"featured_media":1888,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1884","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-general"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What is Passivation? - Surgical Holdings<\/title>\n<meta name=\"description\" content=\"Surgical Holdings Managing Director Dan Coole has spoken to Beyond Clean UK about the topic of passivation as part of their Expert Series.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.surgicalholdings.co.uk\/blog\/2023\/03\/what-is-passivation\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is Passivation? 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