| 外加电位对X80管线钢在鹰潭土壤模拟溶液中应力腐蚀行为的影响 |
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| 引用本文： | 刘智勇,王长朋,杜翠薇,李晓刚.外加电位对X80管线钢在鹰潭土壤模拟溶液中应力腐蚀行为的影响[J].金属学报,2011(11). |
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| 作者姓名： | 刘智勇 王长朋 杜翠薇 李晓刚 |
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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; |
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| 基金项目： | 国家自然科学基金项目50901041; 中央高校基本科研业务费专项资金项目FRF-TP-09-029B资助~~ |
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| 摘 要： | 采用电化学动电位极化技术、慢应变速率拉伸(SSRT)实验和SEM对X80管线钢在鹰潭土壤模拟溶液中的应力腐蚀行为进行了研究.结果表明:X80管线钢在酸性土壤环境中具有较高的SCC敏感性,其断口模式为穿晶SCC;SCC机制随外加电位的不同而改变,在外加电位高于-930 mV时,其SCC机制由阳极溶解和氢致腐蚀两种电极过程控制,呈现阳极溶解和氢脆复合机制;当电位低于该电位时,其SCC为氢脆机制.随着外加阴极电位的降低,X80管线钢的SCC敏感性不断增大;与X70钢相比,氢脆作用在X80管线钢SCC过程中发挥了更重要的作用.
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| 关 键 词： | X80管线钢 应力腐蚀(SCC) 外加阴极电位 土壤环境 |
EFFECT OF APPLIED POTENTIALS ON STRESS CORROSION CRACKING OF X80 PIPELINE STEEL IN SIMULATED YINGTAN SOIL SOLUTION |
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| LIU Zhiyong,WANG Changpeng Corrosion , Protection Center,University of Science , Technology Beijing,Beijing Key Lab of Corrosion,Erosion , Surface Technique of Beijing,Beijing.EFFECT OF APPLIED POTENTIALS ON STRESS CORROSION CRACKING OF X80 PIPELINE STEEL IN SIMULATED YINGTAN SOIL SOLUTION[J].Acta Metallurgica Sinica,2011(11). |
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| Authors: | LIU Zhiyong WANG Changpeng Corrosion Protection Center University of Science Technology Beijing Beijing Key Lab of Corrosion Erosion Surface Technique of Beijing Beijing |
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| Affiliation: | LIU Zhiyong~(1,2)),WANG Changpeng~(1,DU Cuiwei~(1,LI Xiaogang~(1,2)) 1) Corrosion and Protection Center,University of Science and Technology Beijing,Beijing 100083 2) Key Lab of Corrosion,Erosion and Surface Technique of Beijing,Beijing 100083 |
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| Abstract: | Stress corrosion cracking(SCC) of X80 pipeline steel in a simulated solution of the acidic soil environments in Yingtan China was studied by means of potentiodynamic polarization curves,slow strain rate test(SSRT) and corrosion morphologies characterized by SEM.The results show that X80 pipeline steel has high SCC susceptibility in the simulated solution and the failure mode is transgranular cracking.The SCC mechanism would vary with the applied cathodic potential. When the applied potential is positive to ... |
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| Keywords: | X80 pipeline steel stress corrosion cracking(SCC) applied cathodic potential soil environment |
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