Influence of surface roughness on performance of zinc-rich paint coatings

来源期刊：中国有色金属学报(英文版)2002年第6期

论文作者：谢德明 王建明 胡吉明 张鉴清

文章页码：1036 - 1039

Key words：zinc-rich paints; surface roughness; electrochemical impedance spectroscopy; cathodic protection

Abstract: The influence of surface roughness on the performance of zinc-rich paint(ZRP) coatings was studied. Electrochemical impedance spectroscopy(EIS) measurements were used to assess the corrosion prevention performance of the ZRP coatings. Furthermore, the EIS data of the steel-ZRP-sea water system were interpreted according to equivalent circuit models and the corresponding parameters were derived to assess the coating deterioration with time. The results show that the rougher surface favors better protection effect of the ZRP coatings. The protection potential of ZRP coatings for the standards and codes of practice is -0.78V(vs SCE).