等效电路模型在电偶腐蚀中的应用研究  

The Application Research of Equivalent Circuit Model on Galvanic Corrosion

作　　者：李程鹏[1] 彭乔[1] 孙克磊[1] 

机构地区：[1]大连理工大学化工学院,辽宁大连116024

出　　处：《全面腐蚀控制》2012年第4期43-48,共6页Total Corrosion Control

摘　　要：介绍了一维电偶腐蚀体系的等效电路模型和其理论推导。指出金属在腐蚀介质中的极化电阻数据的正确测量和数据选用直接影响到用等效电路模型模拟的可靠性。介绍了分段线性拟合的方法;对实际电位分布的相关性分析得出分段线性拟合法比平均极化阻率法相关程度更高。通过实验验证了这种模型在由溶解氧为控制过程的体系和活性腐蚀体系中的适用性,并且得到了良好的效果。The paper introduces the equivalent circuit model and its theoretical derivation of one- dimensional galvanic corrosion system. The reliability of equivalent circuit model simulation can be directly affected by accurate measurement and choice of polarization resistance data of metal in electrolyte. The paper also introduce piecewise linear fitting method. The degree of correlation of piecewise linear fitting method is higher compared with average polarization resistance method through analysis of correlation of actual potential distribution. The experiments indicate the feasibility of the equivalent circuit model in the oxygen diffusion controlled system and the active corrosion system, which has achieved good agreement.

关 键 词：电偶腐蚀 等效电路 一维系统 电位分布 

分 类 号：TG174[金属学及工艺—金属表面处理]