| X70管线钢楔型缝隙的阴极极化特性 |
| |
| 引用本文： | 宋义全,杜翠薇,张新,李晓刚.X70管线钢楔型缝隙的阴极极化特性[J].金属学报,2006,42(3):305-310. |
| |
| 作者姓名： | 宋义全 杜翠薇 张新 李晓刚 |
| |
| 作者单位： | 北京科技大学腐蚀与防护中心北京市腐蚀、磨蚀与表面工程重点实验室,北京,100083;内蒙古科技大学材料科学与工程学院,包头,014010;北京科技大学腐蚀与防护中心北京市腐蚀、磨蚀与表面工程重点实验室,北京,100083;内蒙古科技大学材料科学与工程学院,包头,014010;北京科技大学腐蚀与防护中心北京市腐蚀、磨蚀与表面工程重点实验室,北京,100083;中国科学院金属研究所腐蚀与防护国家重点实验室,沈阳,110016 |
| |
| 基金项目： | 中国科学院资助项目;教育部"春晖计划" |
| |
| 摘 要： | 应用楔型缝隙模型研究了X70管线钢在新疆库尔勒土壤模拟溶液中的阴极极化特性．研究了极化时间（1—30h）、缝口控电位（-775，-925和-1075mV（V8SCE））和缝口尺寸（0．15，0．30和0．45mm）等因素对缝内的极化电位、极化电流以及对应介质pH值的影响．结果表明，随着极化时间的延长，从缝口到缝底的极化电位梯度和极化电流梯度逐渐减小；随着缝口控电位的降低和缝口尺寸的增大，缝内试样的极化电位逐渐降低，而极化电流却逐渐增大，缝内试样对应介质的pH值也逐渐提高，进一步降低缝口控电位与增加缝口尺寸将使pH值的增加速度减小．
|
| 关 键 词： | X70管线钢 缝隙腐蚀 阴极极化 极化电位 极化电流 |
| 文章编号： | 0412-1960（2006）03-0305-06 |
| 收稿时间： | 2005-06-10 |
| 修稿时间： | 2005-06-102005-09-26 |
CATHODIC POLARIZATION AGAINST CREVICE CORROSION OF X70 PIPELINE STEEL IN SIMULATED SOLUTION OF KU'ERLE SOIL IN XINJIANG |
| |
| SONG Yiquan,DU Cuiwei,ZHANG Xin,LI Xiaogang.CATHODIC POLARIZATION AGAINST CREVICE CORROSION OF X70 PIPELINE STEEL IN SIMULATED SOLUTION OF KU'ERLE SOIL IN XINJIANG[J].Acta Metallurgica Sinica,2006,42(3):305-310. |
| |
| Authors: | SONG Yiquan DU Cuiwei ZHANG Xin LI Xiaogang |
| |
| Affiliation: | 1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083; 2. School of Materials Science and Engineering, Inner Mongolia University of Science and Technology, Baotou 014010; 3. State Key Laboratory of Corrosion and Protection, Institute of Metal Research, The Chinese Academy of Sciences Shenyang 110016;010 |
| |
| Abstract: | Cathodic polarization characteristic of a wedge-shaped crevice of X70 pipeline steel was studied under impressed current cathodic protection in simulated solution of desert soil of Ku'erle in Xinjiang of China. The influences of applied control potentials (-775 mV, -925 mV) and -1075 mV (vs SCE)) and crevice thicknesses (0.15 mm, 0.30 mm and 0.45 mm) on polarization potentials, polarization current and pH value in crevice were investigated. It was shown that the gradients of polarization potential and current in crevice gradually decreased with time. Moreover, with lowering of opening control potential and growing of crevice opening thickness, the polarization potentials in crevice decreased and the polarization current and the pH value in crevice increased. More negative shift of the control potentials and bigger crevice opening thickness can make the growth rate of pH value decrease. |
| |
| Keywords: | X70 pipeline steel crevice corrosion cathodic polarization polarization potential polarization current |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《金属学报》浏览原始摘要信息 |
|
点击此处可从《金属学报》下载全文 |
|
