用XPS分析喷丸处理后800合金在强碱溶液中的腐蚀产物  

THE CHARACTERIZATION OF FILM ON ALLOY 800 AFTER SHOT PEENING IN AQUEOUS ALKALI BY USING XPS

作　　者：朱小明[1] 黄红波[1] 林俊[1] 夏元复[1] 丁亚平[2] 徐雪莲[2] 

机构地区：[1]南京大学物理系,南京210093 [2]上海核工程研究设计院,上海200233

出　　处：《中国腐蚀与防护学报》2004年第4期213-217,共5页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金委 ( 1983 5 0 5 0 )资助;江苏省自然科学基金 (BK -970 41)

摘　　要：对不同喷丸工艺的铁镍基 80 0合金在 30 0℃、5 0 %NaOH溶液中的应力腐蚀行为进行了比较 ,研究了喷丸改善应力腐蚀的原因 .用AES、XPS等测量手段分析了腐蚀 30 0 0h仍未发生应力开裂的样品表面生成的多层惰性膜的化学成分及价态组成 ,并探讨了苛性碱中多层腐蚀膜生成的原因 .The autoclave experiments were applied to investigate stress corrosion cracking (SCC)behaviors of alloy 800 under different shot peening conditions in 300℃,50mass% NaOH solution.The effect of shot peening was discussed either.The final passive films developed on the alloys which have no SCC after 3000 hours in solution were studied by Auger electron spectroscopy and X-ray photoelectron spectroscopy.The results showed that shot peeing creates a compressive residual stress over the alloy surface and could protect against stress corrosion cracking effectively.XPS results showed that the films formed on alloy surface have a trilayered structure in which the topmost layer is composed of pure nickel,followed by an outer part of carbolic grains and an inner part of Cr 2O 3 and a little nickel oxide.Because the topmost nickel disappeared in protective layer and the circumstance became execrable,the corrosion proceeds.

关 键 词：喷丸 合金800 应力腐蚀 XPS谱学 

分 类 号：TG174.44[金属学及工艺—金属表面处理]