{"id":669,"date":"2017-12-15T12:24:14","date_gmt":"2017-12-15T12:24:14","guid":{"rendered":"http:\/\/avanexa.in\/calmet\/?post_type=articles&#038;p=669"},"modified":"2018-05-17T07:53:59","modified_gmt":"2018-05-17T07:53:59","slug":"metallurgical-aspects-of-steel-galvanization","status":"publish","type":"page","link":"https:\/\/wp.calmet.com\/de\/metallurgical-aspects-of-steel-galvanization\/","title":{"rendered":"Metallurgical aspects of steel galvanization"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><div class=\"vc_row wpb_row vc_row-fluid\"><div class=\"wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<h1 class=\"entry-title\"><span style=\"font-size: 24px;\">Metallurgical aspects of steel galvanization<\/span><\/h1>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div><div class=\"vc_row wpb_row vc_row-fluid\"><div class=\"wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>Exposure to environment can affect components or parts made of steel. Changes in temperature or exposure to moisture and air can cause corrosion of steel. It causes a chemical reaction, which results in the oxidation of iron present in the steel. As iron occupies a majority of the volume of steel, corrosion leads to increase in volume but decrease in the strength of the steel product. It is, therefore, important to prevent this chemical reaction to maintain the quality of the steel.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div><div class=\"vc_row wpb_row vc_row-fluid\"><div class=\"wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><h4 style=\"font-size: 20px;color: #008bca;text-align: left\" class=\"vc_custom_heading vc_do_custom_heading\" >Galvanization<\/h4>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>There are a few ways by which the steel surface can be protected from oxidation, and galvanization is one of the most commonly used and reliable ways to achieve that. Galvanization is the process by which steel is coated with zinc that prevents its exposure to the atmosphere and consequently prevents rusting. Galvanization can protect the steel surface for about 15 years or more. Molten zinc is applied on the surface of steel by one of the two methods: hot dipping or electrolytic deposition. Both these methods are successful in preventing the oxidation of iron present in steel and hence avoid corrosion.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<h4 style=\"font-size: 20px;color: #008bca;text-align: left\" class=\"vc_custom_heading vc_do_custom_heading\" >Metallurgical bond<\/h4>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>Galvanization of steel creates a barrier between the atmosphere and the steel surface. During the process of galvanization when the steel surface is coated with molten zinc, chemical reaction occurs. The zinc and the iron present in the steel form a series of zinc-iron alloy bonds. The addition of zinc coating provides impact resistance to the steel surface. The coating adds to hardness and ductility offering greater protection to the steel surface. They are also shield against rough handling of the zinc coated steel. However, the thickness of the zinc coating does not have any effect on the shelf life of the galvanization. This is because the durability or shelf life of galvanization depends on the total coating mass.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<h4 style=\"font-size: 20px;color: #008bca;text-align: left\" class=\"vc_custom_heading vc_do_custom_heading\" >Impact of galvanization<\/h4>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>Zinc is more electrochemically active than steel. In an electrolyte, it becomes the anode for steel. This prevents the formation of cathode and anode areas on the surface. This makes the electrons to flow from zinc anode to steel that creates positive charged zinc ions. Further, the negatively charged electrons are attracted to positive hydrogen ions and reacts with them creating hydrogen gas. Between the electrolyte and the steel cathode there occurs no chemical reaction. This is called as cathodic protection and it prevents the corrosion of the steel. On the anode surface, the positively charged zinc ions react with hydroxyl ions in the electrolyte that are negatively charged. Further, over years, when there is physical damage to the zinc coating, the cathodic protection acts as a shield against corrosion.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<h4 style=\"font-size: 20px;color: #008bca;text-align: left\" class=\"vc_custom_heading vc_do_custom_heading\" >Presence of steel impurities<\/h4>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>More often, steel contains impurities and these affect the process of galvanization. For example, phosphorus as impurity can create tougher coatings of zinc and enhance the resistance to corrosion. Silicon acts similar to zinc during the galvanization process. When zinc is coated on the surface of steel, phosphorous and silicon act as catalyst and enhance the bonding of zinc-iron producing more layers.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Exposure to environment can affect components or parts made of steel. Changes in temperature or exposure to moisture and air can cause corrosion of steel. It causes a chemical reaction, which results in the oxidation of iron present in the steel. As iron occupies a majority of the volume of steel, corrosion leads to increase in volume but decrease in the strength of the steel product. It is, therefore, important to prevent this chemical reaction to maintain the quality of the steel.<\/p>","protected":false},"author":1,"featured_media":49,"parent":0,"menu_order":9,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-669","page","type-page","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Metallurgical aspects of steel galvanization - Steel Casting<\/title>\n<meta name=\"description\" content=\"Metallurgical aspects of steel galvanization includes Galvanization process, Metallurgical bond, Impact of galvanization and Presence of steel impurities.\" \/>\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.calmet.com\/metallurgical-aspects-of-steel-galvanization\/\" \/>\n<meta name=\"twitter:label1\" content=\"Gesch\u00e4tzte Lesezeit\" \/>\n\t<meta name=\"twitter:data1\" content=\"3\u00a0Minuten\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.calmet.com\/metallurgical-aspects-of-steel-galvanization\/\",\"url\":\"https:\/\/www.calmet.com\/metallurgical-aspects-of-steel-galvanization\/\",\"name\":\"Metallurgical aspects of steel galvanization - 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