Cl- 浓度对316 L不锈钢点蚀行为的影响
Effect of Cl- Concentration on 316L Stainless Steel Pitting Corrosion Behavior
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- 引用格式:
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张金钟,谢俊峰,宋文文,廖芸,郑初,刘遇春,林普.Cl- 浓度对316 L不锈钢点蚀行为的影响[J].天然气与石油,2012,30(1):0.doi:
.Effect of Cl- Concentration on 316L Stainless Steel Pitting Corrosion Behavior[J].Natural Gas and Oil,2012,30(1):0.doi:
- DOI:
- 作者:
- 张金钟1 谢俊峰2 宋文文2 廖 芸1 郑 初1 刘遇春1 林 普1
- 作者单位:
- 1.中国石油集团工程设计有限责任公司西南分公司，四川 成都 610017,2.中国石油塔里木油田公司，新疆 库尔勒 841000
- 关键词:
- 不锈钢；CO2腐蚀；氯离子；交流阻抗；动电位极化曲线
Stainless steel； CO2 corrosion； Chloride ion； EIS； Potentiodynamic polarization curve
- 摘要:
- 运用电化学动电位扫描、电化学交流阻抗技术、金相显微以及电子扫描显微技术，对常温常压下，不同浓度的Cl-对316 L不锈钢的CO2腐蚀作用进行了一系列实验。经过实验结果发现，316 L不锈钢呈现出整体腐蚀速率不高而局部腐蚀严重的态势，当氯离子的浓度升高时，316 L的腐蚀表现出整体腐蚀速率有很小的上升，而点蚀电位随着氯离子浓度的上升而降低，导致严重的点蚀。说明氯离子浓度的升高使点蚀电位严重下降，在该环境下316 L不锈钢的腐蚀主要为点蚀特征。
Applied are electrochemical technology and electron microscopy imaging method to conduct study on CO2 corrosion of Cl- with different concentrations on 316L stainless steel in normal temperature and pressure conditions and conduct laboratory experiments to study effect of chloride ion concentration increase on corrosion behavior of 316L stainless steel. Experimental results suggest that in experimental temperature and pressure conditions， overall corrosion rate of 316L stainless steel is not high， but local corrosion is serious， its overall corrosion rate will increase slightly and pitting potential will decrease in case of chloride ion concentration increase， which will result in serious pitting corrosion.
