In fact,the variation of water content within an organic coating will affect its corrosion pro-tection performance.Thus,the penetration of water in an epoxy coating would be studied via distribution of relaxation time(DRT)technique and finite element simulation method in terms of the perspective of mi-cro electrochemistry in this article.Results show that the water penetration process of the epoxy coating may be differentiated into three stages:initial stage,saturation stage and failure stage.In the three stag-es,the different content of water and corrosive medium inside the coating can seriously affect the varia-tion of capacitance of the coating.This paper provides a new comprehensive analysis method for the mechanism study of organic protective coatings.
关键词
环氧涂层/渗水/弛豫时间分布/有限元模拟/腐蚀机理
Key words
epoxy coating/water penetration/distribution of relaxation time/finite element simula-tion/corrosion mechanism
维普
万方数据