新型奥氏体耐热钢钝化膜的XPS谱研究  

Study of Passivation Film on Novel Austenitic Heat-Resistant Steel by X-Ray Photoelectron Spectroscopy

作　　者：杨乔 程晓农[1] YANG Qiao;CHENG Xiao- nong(School of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013

出　　处：《材料保护》2018年第7期20-23,共4页Materials Protection

基　　金：国家高技术研究发展计划(863计划)(2012AA03A501)资助

摘　　要：为了比较新型耐热钢CHDG-A钝化处理前后的耐腐蚀性能,以及研究钝化膜的组成,采用6%FeCl_3溶液浸泡法研究了3种不同表面粗糙度的CHDG-A合金试样的抗点蚀能力,并用X射线光电子能谱(XPS)研究了经硝酸钝化后合金表面钝化膜的主要成分。结果表明:表面粗糙度越大,合金的抗点蚀性能越差,而经过硝酸钝化后耐蚀性能大幅提高;钝化膜表面的主要成分是CrO_3、Cr_2O_3、Fe_2O_3等氧化物,钝化膜内部主要为Cr_2O_3、Fe_3O_4、Cr单质、Fe单质、Ni单质等,Cr、Ni单质的存在有利于提高钝化膜的稳定性。In order to compare the corrosion resistance of the novel heat - resistant steel CHDG - A before and after passivation treatment and study the composition of the passive film, the pitting corrosion resistance of three kinds of CHDG-A alloy samples with different surface rough- ness was studied by 6% FeCl3 solution immersion test. In addition, the main components of the passive film on the surface of alloy passivated in nitric acid were investigated by X-ray photoelectron spectroscopy （XPS）. Results showed that the bigger surface roughness led to the worse pitting corrosion resistance of the alloy, The corrosion resistance of the alloy was greatly improved after passivation of nitric acid. The main components of the surface passive film were CrO3, Cr2O3, Fe2O3 and other oxides, while the inner passivation film mainly contained Cr2O3, Fe3O4, Cr, Fe and Ni. Moreover, the existence of Cr and Ni substance was in favor of the improvement of the stability of the passive film.

关 键 词：奥氏体耐热钢 粗糙度 钝化膜 X射线光电子能谱 成分 

分 类 号：TG174.4[金属学及工艺—金属表面处理]