| X70管线钢在近中性及高pH值溶液中的电化学行为和SCC敏感性 |
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| 引用本文： | 周建江,刘杏,李光福,郭浩,杨武.X70管线钢在近中性及高pH值溶液中的电化学行为和SCC敏感性[J].腐蚀与防护,2007,28(1):1-5. |
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| 作者姓名： | 周建江 刘杏 李光福 郭浩 杨武 |
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| 作者单位： | 1. 上海材料研究所,上海,200437
2. 上海材料研究所,上海,200437;上海交通大学材料科学与工程学院,上海,200030 |
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| 基金项目： | 国家重点基础研究专项经费(G19990650)，上海市科技发展基金项目(025258036)，上海市自然科学基金(02ZE14031)资助 |
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| 摘 要： | 采用动电位极化曲线测试法研究了温度、通气条件和pH值对X70管线钢在NS4溶液和0.5 mol/LNa2CO3 1 mol/L NaHCO3溶液中的电化学极化行为的影响,并用慢应变速率试验(SSRT)研究了X70管线钢在这些溶液中的应力腐蚀破裂(SCC)敏感性。结果表明,X70管线钢在NS4溶液中不出现活化—钝化转变区,随外加电位负移,SCC敏感性增加,表现出氢致破裂(HIC)的特征;在0.5 mol/L Na2CO3 1 mol/L NaHCO3高pH值溶液中出现活化—钝化转变区,在阴极极化区,也表现出氢致破裂(HIC)的特征,但在阳极极化区,发生的是阳极溶解型应力腐蚀破裂(ADSCC)。
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| 关 键 词： | 管线钢 近中性溶液 高pH值溶液 电化学行为 SCC敏感性 |
| 文章编号： | 1005-748X（2007）01-0001-05 |
| 收稿时间： | 2006-07-04 |
| 修稿时间： | 2006年7月4日 |
ELECTROCHEMICAL BEHAVIOUR AND SCC SUSCEPTIBILITY OF PIPELINE STEEL X70 IN NEAR-NEUTRAL AND HIGH pH SOLUTIONS |
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| ZHOU Jian-jiang,LIU Xing,LI Guang-fu,GUO Hao,YANG Wu.ELECTROCHEMICAL BEHAVIOUR AND SCC SUSCEPTIBILITY OF PIPELINE STEEL X70 IN NEAR-NEUTRAL AND HIGH pH SOLUTIONS[J].Corrosion & Protection,2007,28(1):1-5. |
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| Authors: | ZHOU Jian-jiang LIU Xing LI Guang-fu GUO Hao YANG Wu |
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| Affiliation: | 1. Shanghai Research Institute of materials, Shanghai 200437, China; 2. School of Material Science and Engineering, Shanghai Jiaotong University, Shanghai 200030, China |
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| Abstract: | The influence of temperature,aerated condition and pH value on the electrochemical behavior and stress corrosion cracking(SCC) susceptibility of X70 pipeline steel in NS4 solution and 0.5 mol/L Na_2CO_3 1 mol/L NaHCO_3 solution was investigated using potentiodynamic polarization measurements and slow strain rate tests(SSRT).In NS4 solution,active-passive transition behavior did not appear and SCC susceptibility increased with the negative movement of applied potential,indicating character of hydrogen induced cracking(HIC).In 0.5 mol/L Na_2CO_3 1 mol/L NaHCO_3 solution,active-passive transition behavior was found in the potentiodynamic polarization curves,character of hydrogen induced cracking(HIC) was shown in cathodic polarization region and anodic dissolution SCC(ADSCC) occurred in anodic polarization region. |
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| Keywords: | Pipeline steel High-pH solution NS4 solution Electrochemical behavior SCC susceptibility |
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