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.
出处
《天然气与石油》
2012年第1期71-73,104,共3页
Natural Gas and Oil
基金
中国石油集团工程设计有限责任公司科研项目资助(KY2010-32)
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
