超级双相不锈铸钢电化学极化表面腐蚀产物的XPS分析  

CORROSION COMPOSITIONS ON SURFACE AFTER ELECTROCHEMICAL POLARIZATION OF DUPLEX STAINLESS CAST STEEL BY XPS

作　　者：向红亮[1] 何福善[1] 刘东[1] 

机构地区：[1]福州大学机械工程及自动化学院,福州350108

出　　处：《中国腐蚀与防护学报》2010年第4期288-294,共7页Journal of Chinese Society For Corrosion and Protection

基　　金：科技部科技人员服务企业项目(SQ2009GJC40018);福建省青年人才创新基金项目(2008F3061);福州大学科技发展基金项目(2008-XQ-16)资助

摘　　要：采用X射线光电子能谱(XPS)技术研究了超级双相不锈铸钢在人工海水中经电化学极化后表面腐蚀产物。结果表明:双相不锈钢在人工海水中极化后的钝化膜表层主要以CrO_3、CrOOH、Cr(OH)_3和Fe(OH)_3等氢氧型化合物为主,内层主要以CrO_3、Cr_2O_3、FeO和Ni_2O_3等氧化物为主,同时膜内层存在Fe、Cr、Ni和Mo单质。MoO_4^(2-)和NH_4^+吸附在钝化膜表面,对钝化膜起到保护作用。Corrosion deposites of super duplex stainless cast steel on surface after electrochemical polarization in arterial seawater were studied by X-ray photoelectron spectroscopy in this paper.The results indicate that the outside passive film of cast duplex stainless steel is mainly composed of CrO_3 and hydroxide type compounds such as CrOOH,Cr（OH）_3,Fe（OH）_3.The inside film is mainly composed of oxide such as CrO_3、Cr_2O_3,FeO, Ni_2O_3,and some elements of Fe,Cr,Ni,Mo as simple substance in it.MoO_4^（2-） and NM_4~＋ ions exist between passive film and solution which act fairly protective effect.

关 键 词：X射线光电子能谱 超级双相不锈铸钢 钝化膜 人工海水 

分 类 号：TG174.3[金属学及工艺—金属表面处理]