ELECTROCHEMICAL EVALUATION OF DISSOLUTION CHARACTERISTICS OF Al-BASED SACRIFICIAL ANODES IN SEAWATER

The surface dissolution characteristics of Al-based sacrificial anodes in seawater have never been expressed numerically except in words such as uniform dissolution, non-uniform dissolution, serious localized dissolution, etc. An electrochemical method was developed in our laboratory to evaluate the above mentioned characteristics quantitatively. The Al anode samples are polarized to -1000 mv (vs. Ag/AgCl reference electrode) in seawater at 25±1℃, ami anodic current-time curves are recorded simultaneously. Then the coulometric density was calculated with the aid of a planimeter. By comparing the coulometric densities of these samples, the surface dissolution characteristics of anodes can be evaluated quantitatively.     

合金元素对低合金钢在不同区带耐腐蚀性能影响的研究

在模拟的近海条件下采用电连接方法研究了合金元素对低合金钢腐蚀性能的影响,结果表明元素Cu,P,Mo,W,V,和Cr,Al,Mo分别对大气区、飞溅区和全浸区的耐蚀性有明显的影响。