石树坤,王均,李海丰,王院生,闫静,范洪远

• 1:四川大学制造学院
• 2:中国核动力研究设计院
• 3:西南油气田分公司天然气研究院

摘要(Abstract)：

采用极化曲线法和交流阻抗法,分析了经1040℃(40 min)固溶处理后的2205双相不锈钢经不同时效温度和时间处理后在85℃饱和CO2地层水溶液中的电化学腐蚀特性,并借助金相显微镜、X射线衍射仪(XRD)、扫描电镜(SEM)和能谱仪(EDS)观察其显微组织的变化。结果表明,当800～900℃时效后,双相不锈钢的自腐蚀电位随着时效温度的升高向正向移动,电流密度先增大后减小,在850℃时,钝化区间已不明显,腐蚀速率达到最大;在相同的时效温度下,随着时效时间的延长,自腐蚀电位愈正,钝化区间逐渐缩小直至消失,腐蚀速率随时间的延长逐渐增大。通过微观分析表明,时效析出相σ相是产生点蚀导致高温时效双相不锈钢耐电化学腐蚀能力下降的主要原因。

关键词(KeyWords)： 2205不锈钢;固溶时效;气田地层水;动电位扫描;微观组织

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(50901047);; 教育部博士点新教师基金(200806101051)

作者(Author): 石树坤,王均,李海丰,王院生,闫静,范洪远

DOI: 10.13289/j.issn.1009-6264.2012.01.013

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