| 硫化氢环境下两种不锈钢的应力腐蚀开裂行为 |
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| 引用本文： | 刘智勇,董超芳,李晓刚,王立贤,郅青,梁平.硫化氢环境下两种不锈钢的应力腐蚀开裂行为[J].北京科技大学学报,2009,31(3). |
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| 作者姓名： | 刘智勇 董超芳 李晓刚 王立贤 郅青 梁平 |
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| 作者单位： | 北京科技大学腐蚀与防护中心;北京市腐蚀、磨蚀与表面技术开放实验室,北京,100083 |
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| 基金项目： | 国家自然科学基金资助项目(No.50401016) |
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| 摘 要： | 用U形弯试样浸泡和慢应变速率拉伸实验研究了3Cr17Ni7Mo2SiN和00Cr22Ni5Mo3N(2205)不锈钢在硫化氢介质中的应力腐蚀开裂(SCC)行为.2205不锈钢的SCC萌生孕育期较长,在pH较低的饱和H2S溶液中具有明显的SCC敏感性,其SCC敏感性随溶液pH值的升高或H2S含量的降低而迅速降低.3Cr17Ni7Mo2SiN的SCC孕育期均低于2205不锈钢,在pH≤4.5、H2S的质量浓度≥103mg·L-1的H2S介质中均具有明显的SCC敏感性,其SCC敏感性受pH值和H2S含量变化影响较小.3Cr17Ni7Mo2SiN的SCC以沿晶裂纹萌生,扩展后转变为穿晶应力腐蚀开裂;2205不锈钢近表面处首先发生奥氏体-铁素体相间氢致开裂,并促进SCC萌生,其SCC为穿晶应力腐蚀开裂.
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| 关 键 词： | 不锈钢 硫化氢 应力腐蚀开裂 慢应变速率拉伸 |
Stress corrosion cracking behaviour of two stainless steels in hydrogen sulfide environment |
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| LIU Zhi-yong,DONG Chao-fang,LI Xiao-gang,WANG Li-xian,ZHI Qing,LIANG Ping.Stress corrosion cracking behaviour of two stainless steels in hydrogen sulfide environment[J].Journal of University of Science and Technology Beijing,2009,31(3). |
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| Authors: | LIU Zhi-yong DONG Chao-fang LI Xiao-gang WANG Li-xian ZHI Qing LIANG Ping |
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| Abstract: | Stress corrosion cracking(SCC)of 3Cr17Ni7Mo2SiN and 00Cr22Ni5Mo3N(2205)stainless steels in acidic hydrogen sulfide solutions was investigated by slow strain rate tensile test and U-bent specimen immersing test.The time to SCC failure of 2205 stainless steel was much longer than that of 3Cr17Ni7Mo2SiN stainless steel.2205 stainless steel was highly susceptible to SCC at a lower pH level in saturated H2S solution,and its SCC susceptibility sharply decreased with increasing pH value or decreasing H2S concentra... |
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| Keywords: | stainless steel hydrogen sulphide stress corrosion cracking slow strain rate tension |
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