| 含Cl^-，SO4^2-溶液中X70管线钢缝隙的阴极极化行为 |
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| 引用本文： | 张新,杜翠薇,李晓刚,宋义全.含Cl^-，SO4^2-溶液中X70管线钢缝隙的阴极极化行为[J].北京科技大学学报,2007,29(4):386-389. |
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| 作者姓名： | 张新 杜翠薇 李晓刚 宋义全 |
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| 作者单位： | 北京科技大学材料科学与工程学院腐蚀与防护中心，北京科技大学材料科学与工程学院腐蚀与防护中心，北京科技大学材料科学与工程学院腐蚀与防护中心，北京科技大学材料科学与工程学院腐蚀与防护中心 北京100083内蒙古科技大学材料科学与工程学院，包头014010，北京100083，北京市腐蚀、磨蚀与表面工程重点实验室，北京100083，北京100083，北京市腐蚀、磨蚀与表面工程重点实验室，北京100083，北京100083内蒙古科技大学材料科学与工程学院，包头014010 |
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| 基金项目： | 国家自然科学基金资助项目(No.50301003，No50499333) |
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| 摘 要： | 研究了X70管线钢缝隙在含Cl-、SO42-溶液中阴极极化行为.实验结果表明:在-1000mV(CSE)缝口控电位下,随着缝隙开口尺寸增大,缝隙尖端越靠近缝口控电位;在同一缝隙开口尺寸时,随着缝口控电位的增大,缝隙内越容易达到保护状态.欠保护状态下,缝隙腐蚀会发生,缝隙内溶液pH值降低;保护状态下,缝隙内溶液pH值升高有碱化趋势.
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| 关 键 词： | X70管线钢 氯离子 硫酸根离子 阴极保护 |
| 修稿时间： | 2005-12-31 |
Cathodic polarization behavior of an X70 pipeline steel crevice in solution containing Cl^- and SO4^2- |
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| ZHANG Xin, DU Cuiwei, LI Xiaogang, SONG Yiqian.Cathodic polarization behavior of an X70 pipeline steel crevice in solution containing Cl^- and SO4^2-[J].Journal of University of Science and Technology Beijing,2007,29(4):386-389. |
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| Authors: | ZHANG Xin DU Cuiwei LI Xiaogang SONG Yiqian |
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| Institution: | 1. Corrosion and Protection Center, Materials Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China ;2. Materials Science and Engineering School, Inner Mongolia University of Science and Technology, Baotou 014010, China ;3. Corrosion Erosion and Surface Technology Key Laboratory Beijing, Beijing 100083, China |
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| Abstract: | Cathodic polarization behavior of an X70 pipeline steel crevice in solution containing Cl-and SO2-4 was studied.Experimental results show that at a protection potential of-1 000 mV vs CSE,with increasing crevice size the potential of the crevice tip is close to the protection potential;at the same crevice size,with the increase of protection potential the status of protection is easily reached in the crevice.Under unprotection condition,crevice corrosion can happen and the pH value of solution reduces in the crevice;under protection condition,the pH of solution can rise and in the crevice the solution alkalized. |
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| Keywords: | X70 pipeline steel chlorion sulphate ion cathodic protection |
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