{"id":1964,"date":"2020-12-07T20:54:54","date_gmt":"2020-12-07T11:54:54","guid":{"rendered":"https:\/\/www.mako-metal.com\/eng\/?p=1964"},"modified":"2021-07-26T20:00:28","modified_gmt":"2021-07-26T11:00:28","slug":"%e3%83%81%e3%82%bf%e3%83%b3%e3%81%af%e5%a4%89%e8%89%b2%e3%81%99%e3%82%8b%ef%bc%9f%e3%81%9d%e3%81%ae%e5%8e%9f%e7%90%86%e3%81%a8%e5%af%be%e7%ad%96%e3%82%92%e5%be%b9%e5%ba%95%e8%a7%a3%e8%aa%ac%ef%bc%81","status":"publish","type":"post","link":"https:\/\/www.mako-metal.com\/eng\/archives\/1964","title":{"rendered":"Does titanium discolor? An in-depth explanation of its principles and countermeasures!"},"content":{"rendered":"<p>What color do you think of when you hear the word &#8220;titanium&#8221;?<\/p>\n<p>Some traditional titanium products have a light brown appearance.<br \/>\nSome titanium products have a light brown appearance, while others, such as watches, have a black appearance.<\/p>\n<p>Therefore, some people may think that titanium is brown or black.<br \/>\nThe color tone of pure titanium varies slightly depending on the titanium alloy or pure titanium, but the color of pure titanium is generally silver.<\/p>\n<p>However, why does titanium have a different color despite being made of the same material?<br \/>\nIn this article, I&#8217;d like to explain this thoroughly!<\/p>\n<p><img class=\"size-full wp-image-2569 alignleft\" src=\"https:\/\/www.mako-metal.com\/eng\/makomtlen\/wp-content\/uploads\/2020\/12\/tih1.jpg\" alt=\"\" width=\"800\" height=\"324\" srcset=\"https:\/\/www.mako-metal.com\/eng\/makomtlen\/wp-content\/uploads\/2020\/12\/tih1.jpg 800w, https:\/\/www.mako-metal.com\/eng\/makomtlen\/wp-content\/uploads\/2020\/12\/tih1-300x122.jpg 300w, https:\/\/www.mako-metal.com\/eng\/makomtlen\/wp-content\/uploads\/2020\/12\/tih1-768x311.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<div id=\"toc_container\" class=\"no_bullets\"><p class=\"toc_title\">contents<\/p><ul class=\"toc_list\"><li><a href=\"#Why_does_titanium_become_colored\"><span class=\"toc_number toc_depth_1\">1<\/span> Why does titanium become colored?<\/a><\/li><li><a href=\"#So_does_titanium_discolor_if_left_unattended\"><span class=\"toc_number toc_depth_1\">2<\/span> So, does titanium discolor if left unattended?<\/a><\/li><li><a href=\"#What_should_I_do_if_the_color_changes\"><span class=\"toc_number toc_depth_1\">3<\/span> What should I do if the color changes?<\/a><\/li><li><a href=\"#How_can_I_do_this_with_as_little_maintenance_as_possible\"><span class=\"toc_number toc_depth_1\">4<\/span> How can I do this with as little maintenance as possible?<\/a><\/li><\/ul><\/div>\n<h2><span id=\"Why_does_titanium_become_colored\">Why does titanium become colored?<\/span><\/h2>\n<p>Similarly, the representative of [rust-proof] metals is stainless steel.<br \/>\nStainless steel is a steel made of iron, chromium, nickel, and so on. In other words, strictly speaking, it is &#8220;rust-resistant.<\/p>\n<p>The mechanism that makes it rust-resistant is the presence of a passive film called chromium oxide on its surface.<br \/>\nThis makes it resistant to rusting.<\/p>\n<p>Titanium, on the other hand, does not have iron components, so it does not have rust (red rust or black rust) as we know it.<br \/>\nOn the surface of titanium, there is a passive film called titanium oxide.<\/p>\n<p>Thanks to this passive film, corrosion is inhibited.<br \/>\nWhen left outdoors, this oxide film grows subtly, causing a change in color tone.<\/p>\n<p>Commonly used color titanium products are made by controlling the thickness of this passive film.<br \/>\nThe most common color titanium products express vivid colors by controlling the thickness of the passive titanium oxide film.<\/p>\n<p><img class=\"alignleft size-full wp-image-2568\" src=\"https:\/\/www.mako-metal.com\/eng\/makomtlen\/wp-content\/uploads\/2020\/12\/tih2.jpg\" alt=\"\" width=\"800\" height=\"216\" srcset=\"https:\/\/www.mako-metal.com\/eng\/makomtlen\/wp-content\/uploads\/2020\/12\/tih2.jpg 800w, https:\/\/www.mako-metal.com\/eng\/makomtlen\/wp-content\/uploads\/2020\/12\/tih2-300x81.jpg 300w, https:\/\/www.mako-metal.com\/eng\/makomtlen\/wp-content\/uploads\/2020\/12\/tih2-768x207.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h2><span id=\"So_does_titanium_discolor_if_left_unattended\">So, does titanium discolor if left unattended?<\/span><\/h2>\n<p>When the thickness of the passive film is affected by exposure to the outdoors, it appears as a discoloration.<\/p>\n<p>Therefore, it is very important to use titanium made by a special manufacturing method that is resistant to color change for products that are concerned about color change, such as architectural and interior applications.<br \/>\n(In our company, we use Trannyxie titanium of Nippon Steel Corporation as base material.<\/p>\n<p>(We use Trannyxie Titanium of Nippon Steel Corporation as our base material.) Many general-purpose titanium products sold in the market are not made with such a manufacturing process that prevents discoloration, so if you use the wrong one, the color will change like a famous roof.<br \/>\nThe light, brownish color is a characteristic of titanium, but the extreme mottled change is not very acceptable unless it is designed as such.<\/p>\n<p>Please be careful about the material.<br \/>\nNext is the change caused by oil.\u3000Because titanium has a color tone that changes depending on the reflection of light, when an oil film is applied on top of the passive film, the thickness of the film tentatively increases.<\/p>\n<p>This is why it looks like a discoloration.<br \/>\nIt can also be discolored by dust, dirt, and grime.<br \/>\nA bad idea is to use stainless steel cleaning agents sold at home improvement stores.<br \/>\nIf there is even a very small amount of fluoride in the ingredients, it will cause discoloration. Please be careful.<\/p>\n<h2><span id=\"What_should_I_do_if_the_color_changes\">What should I do if the color changes?<\/span><\/h2>\n<p>For common grease stains (such as hand stains), wiping with a dry tissue paper will restore the original appearance.\u3000Wiping with water is also effective.<\/p>\n<p>For persistent stains, neutral detergent is good.<br \/>\n(*Acidic and alkaline detergents are not recommended. (*Acidic and alkaline detergents are not recommended, since you cannot tell the trace ingredients.<\/p>\n<p>If you still can&#8217;t get it off, try cleaning with alcohol.<br \/>\nIf this doesn&#8217;t work, it&#8217;s likely that the surface has already reacted.<\/p>\n<p>In other words, no-maintenance is okay, but still, if it gets a little dirty, you can have it maintained and it will keep its beautiful surface.<\/p>\n<h2><span id=\"How_can_I_do_this_with_as_little_maintenance_as_possible\">How can I do this with as little maintenance as possible?<\/span><\/h2>\n<p>The best thing to do is not to affect the oxide film (passive film).<\/p>\n<p>This is also true for the metal.\u3000Therefore, a thin coating on the surface of titanium can help it last longer.<br \/>\nFor example, a quick coat of a glass-based coating such as our Macoat_GC is very effective against oil stains, dust, and dirt.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What color do you think of when you hear the word &#8220;titanium&#8221;? Some traditional titanium products have a light brown appearance. Some titanium products have a light brown appearance, while others, such as watches, have a black appearance. Therefore, some people may think that titanium is brown or black. The &#8230; <\/p>\n","protected":false},"author":1,"featured_media":2568,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[4],"tags":[],"_links":{"self":[{"href":"https:\/\/www.mako-metal.com\/eng\/wp-json\/wp\/v2\/posts\/1964"}],"collection":[{"href":"https:\/\/www.mako-metal.com\/eng\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.mako-metal.com\/eng\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.mako-metal.com\/eng\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mako-metal.com\/eng\/wp-json\/wp\/v2\/comments?post=1964"}],"version-history":[{"count":6,"href":"https:\/\/www.mako-metal.com\/eng\/wp-json\/wp\/v2\/posts\/1964\/revisions"}],"predecessor-version":[{"id":2570,"href":"https:\/\/www.mako-metal.com\/eng\/wp-json\/wp\/v2\/posts\/1964\/revisions\/2570"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.mako-metal.com\/eng\/wp-json\/wp\/v2\/media\/2568"}],"wp:attachment":[{"href":"https:\/\/www.mako-metal.com\/eng\/wp-json\/wp\/v2\/media?parent=1964"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.mako-metal.com\/eng\/wp-json\/wp\/v2\/categories?post=1964"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.mako-metal.com\/eng\/wp-json\/wp\/v2\/tags?post=1964"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}