摘要
通过交流阻抗测试技术对16Mn钢在不同土壤中不同湿度条件下的阴极极化行为进行了研究,提出了通过实验室实验确定阴极保护参数的方法.结果表明:可以通过交流阻抗技术绘制出电荷转移电阻(Rt)对阴极极化电位(Ee,c)曲线,用于分析腐蚀过程的控制机制,指导阴极保护参数的选取.由Rt-Ee,c曲线形状可以判断腐蚀控制步骤,并根据曲线上的特征点确定阴极保护最小保护电位、最佳保护电位和最大保护电位,通过失重实验进一步证明了采用Rt—Ee,c曲线选取土壤中阴极保护的参数是可行的.
Cathodic polarization behavior of 16Mn steel had been studied in four types of soil with different moisture contents by electrochemical impedance spectroscopy （EIS）. A method was found out to determine cathodic protection parameters rapidly and exactly by simulation experiment in laboratory. The results revealed that charge transfer resistance（Rt） vs cathodic polarization potential （Ee, c） curves plotted by EIS, which could be used to analyze control mechanism of corrosion process and to select appropriate cathodic protection parameters. Corrosion control mechanism could be judged by the shape of Rt-Ee, c curves. Characteristic points of the curves could determine the minimum protection potential, the optimum protection potential and the maximum protection potential. And then it was feasible that the cathodic protection parameter in soil could be studied by the curves of charge transfer resistance（Rt）vs cathodic polarization potential（Ee,c）according to weight loss experiment.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2006年第6期404-409,共6页
Corrosion Science and Protection Technology
基金
中油股份天然气与管道分公司资助项目(010203-04)
