User:Valanezhad

Parkerizing or zinc phosphatizing, a kind of zinc phosphate coating is utilized for mild steel to acquire a protective layer against a corrosion reaction. Although this method is useful for mild steels, it is not possible for 316L-type stainless steels because of their lower chemical reactivity. In our preliminary experiment, a traditional Parkerizing method was employed to 316L stainless steel. However, the zinc phosphate coating could not be obtained on 316L stainless steel, even after being soaked for 30 days. Based on this result, we thought that a high temperature more than 100 °C may be necessary to obtain the phosphate coating layer on 316L stainless steel. Thus, hydrothermal treatment was used for the zinc phosphate coating on 316L Stainless steel in this experiment. The aim of this study is to investigate the preparation condition to obtain the zinc phosphate coating on 316L stainless steel. In order to investigate the possibility of preparing zinc phosphate coating on 316L SS, substrates were subjected to hydrothermal treatment in zinc phosphate solution at different temperatures and duration times. SEM observation with EDX analysis showed that the zinc phosphate coating layer was successfully prepared at 200 °C for 24 h. Besides, XRD results indicated that the crystal phase of the coating layer was assigned to zinclipscombite (ZnFe 2 (PO4) 2 (OH) 2 ). XRD peaks were assigned to zinclipscombite which was found as a new mineral species in 2006 http://www.springerlink.com/content/2u13435487684231/. Therefore, this is the first report on fabrication of artificial zinclipscombite http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TVV-514R624-2&_user=131115&_coverDate=12%2F25%2F2010&_rdoc=1&_fmt=high&_orig=search&_origin=search&_sort=d&_docanchor=&view=c&_searchStrId=1562894499&_rerunOrigin=google&_acct=C000009658&_version=1&_urlVersion=0&_userid=131115&md5=2098da3b86bb9f059f42c3ceefa176b7&searchtype=a.