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中国腐蚀与防护学报  2010, Vol. 30 Issue (1): 29-34    
  研究报告 本期目录 | 过刊浏览 |
不同组织X80钢在高pH土壤模拟溶液中的点蚀电化学行为
黄峰1;2;曲炎淼1;邓照军1;3;刘静1;郑超超1;李晓刚2
1. 武汉科技大学材料与冶金学院 武汉 430081
2. 北京科技大学腐蚀与防护中心 北京 100083
3. 武钢集团钢铁研究院 武汉 430080
PITTING ELECTROCHEMICAL BEHAVIORS OF DIFFERENT MICROSTRUCTURE X80 STEEL IN HIGH pH SOIL SIMULATIVE SOLUTION
HUANG Feng1;2; QU Yanmiao1; DENG Zhaojun1;3; LIU Jing1;ZHENG Chaochao1; LI Xiaogang2
1. College of Materials Science and Metallurgical Engineering; Wuhan University of Science and Technology; Wuhan 430081
2. Corrosion and Protection Center; University of Science and Technology Beijing;Beijing 100083
3. Wu Gang Corp. Iron and Steel Research Institute;Wuhan 430080
全文: PDF(1855 KB)  
摘要: 

将水淬、空冷方式热处理的X80钢与供货状态(原始组织)X80钢相比较,用动电位极化曲线和动电位交流阻抗谱研究不同组织X80 钢在0.5 mol/L Na2CO3+1 mol/L NaHCO3高pH值土壤模拟溶液中的点蚀电化学行为。结果表明,水淬热处理后的X80钢更易钝化,点蚀敏感性低,但维钝电流较其他两种组织的都大;三种组织的X80钢极化电阻和电极表面状态常数n值随电位的变化规律基本一致,但水淬组织的n值在不同电位区间分别高于或低于其他两种组织;这些电化学行为的差异与不同组织试样表面钝化膜的非均匀性和致密程度有关;动电位极化法和动电位电化学阻抗谱法所得结论一致,腐蚀电流密度随电位的变化及电极极化电阻随电位变化都可用来反映电极的点蚀行为。

关键词 X80钢热处理点蚀动电位极化动电位交流阻抗    
Abstract

The different microstructure of X80 steel was obtained by heat treatment, water quenching and air cooling. The pitting electrochemical behavior of X80 pipeline steel with three different microstructure in 0.5 mol/L Na2CO3+1 mol/L NaHCO3 high pH soil simulative solution was investigated by potentiodynamic polarization and electrochemical impedance spectroscopy. The results indicated that the corrosion inhibition of X80 steel after heat treatment became worse compared with original microstructure, but passivated easily;the law of Rp and n of three microstructures steel varying with potential is same, and n is bigger or lower in different potential ranges; the difference of microstructure caused by heat treament and the uniformity of passive films should be responsible to the different electrochemical behavior. The conclusion from potentiodynamic polarization curve is the same to the conclusion reached by electrochemical impedance spectroscopy.

Key wordsX80 steel    heattreament    pitting corrosion    potentiodynamic polarization    potentiodynamic electrochemical impedance
收稿日期: 2009-07-29     
ZTFLH: 

TG172.4

 
基金资助:

国家自然科学基金项目(50871077)和中国博士后科学基金项目(20090450293)资助

通讯作者: 刘静     E-mail: wkdliu@126.com
Corresponding author: LIU Jing     E-mail: wkdliu@126.com
作者简介: 黄峰,女,1972年生,博士,副教授,研究方向为材料腐蚀与防护及新金属能源材料

引用本文:

黄峰;曲炎淼;邓照军;刘静;郑超超;李晓刚. 不同组织X80钢在高pH土壤模拟溶液中的点蚀电化学行为[J]. 中国腐蚀与防护学报, 2010, 30(1): 29-34.
HUANG Feng, QU Tan-Miao, DENG Zhao-Jun, LIU Jing. PITTING ELECTROCHEMICAL BEHAVIORS OF DIFFERENT MICROSTRUCTURE X80 STEEL IN HIGH pH SOIL SIMULATIVE SOLUTION. J Chin Soc Corr Pro, 2010, 30(1): 29-34.

链接本文:

https://www.jcscp.org/CN/      或      https://www.jcscp.org/CN/Y2010/V30/I1/29

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