{"id":44,"date":"2017-07-31T23:08:00","date_gmt":"2017-07-31T23:08:00","guid":{"rendered":"http:\/\/investmech.com\/FatigueBlog\/?p=44"},"modified":"2020-03-24T01:45:45","modified_gmt":"2020-03-23T23:45:45","slug":"stress-corrosion-cracking-austenitic-stainless-steel","status":"publish","type":"post","link":"http:\/\/investmech.com\/FatigueBlog\/stress-corrosion-cracking-austenitic-stainless-steel\/","title":{"rendered":"Stress Corrosion Cracking: Austenitic Stainless Steel"},"content":{"rendered":"\n<p>The root cause for stress corrosion cracking on an elution column was related to the presence of Chlorides from the Hydrochloric Acid in another process on the plant. <!--more-->Cracks, multiple of them (some in parallel) initiated away from stress concentrations.  Approximate concentrations of free Chlorides and Nitrites &amp; Nitrides were measured, which indicated the presence of these chemicals.<\/p>\n\n\n\n<p>A Duplex Stainless Steel would have been a better material to use in this application. The photograph below shows how a Weber Rielly measurement of salts was done on the column.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img src=\"http:\/\/investmech.com\/FatigueBlog\/wp-content\/uploads\/2017\/07\/Measureing-chloride-resdue-768x549.jpg\" alt=\"Weber Rielly measurement of salts done on a column\"\/><\/figure><\/div>\n\n\n\n<p>The photograph below shows the Chloride test that was done using an Elcometer 134S Salt Detection Kit.  The results showed Chloride concentrations &gt;600 mg\/m2, but, no Nitrate and Nitrites were measured.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img src=\"http:\/\/investmech.com\/FatigueBlog\/wp-content\/uploads\/2017\/07\/Measuring-nitrides-and-nitrates-768x788.jpg\" alt=\"Chloride test using an Elcometer 134S Salt Detection Kit\"\/><\/figure><\/div>\n","protected":false},"excerpt":{"rendered":"<p>The root cause for stress corrosion cracking on an elution column was related to the presence of Chlorides from the Hydrochloric Acid in another process on the plant.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[4],"tags":[],"_links":{"self":[{"href":"http:\/\/investmech.com\/FatigueBlog\/wp-json\/wp\/v2\/posts\/44"}],"collection":[{"href":"http:\/\/investmech.com\/FatigueBlog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/investmech.com\/FatigueBlog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/investmech.com\/FatigueBlog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/investmech.com\/FatigueBlog\/wp-json\/wp\/v2\/comments?post=44"}],"version-history":[{"count":2,"href":"http:\/\/investmech.com\/FatigueBlog\/wp-json\/wp\/v2\/posts\/44\/revisions"}],"predecessor-version":[{"id":58,"href":"http:\/\/investmech.com\/FatigueBlog\/wp-json\/wp\/v2\/posts\/44\/revisions\/58"}],"wp:attachment":[{"href":"http:\/\/investmech.com\/FatigueBlog\/wp-json\/wp\/v2\/media?parent=44"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/investmech.com\/FatigueBlog\/wp-json\/wp\/v2\/categories?post=44"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/investmech.com\/FatigueBlog\/wp-json\/wp\/v2\/tags?post=44"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}