摘要
采用弛豫时间分布(DRT)技术和有限元模拟方法,从微观电化学角度分析研究了环氧涂层的渗水行为过程。结果表明:环氧涂层的渗水过程分为3个阶段:初始阶段、饱和阶段和失效阶段。3个阶段中,涂层内部水和腐蚀性介质的含量不同,会严重影响涂层的电容变化。本文为有机防护涂层的机理研究提供了一种新的综合分析方法。
In fact,the variation of water content within an organic coating will affect its corrosion protection 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 micro 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 stages,the different content of water and corrosive medium inside the coating can seriously affect the variation of capacitance of the coating.This paper provides a new comprehensive analysis method for the mechanism study of organic protective coatings.
作者
韩东晓
纪文会
王通
王巍
HAN Dongxiao;JI Wenhui;WANG Tong;WANG Wei(Beijing Shiny Tech.Co.Ltd.,Beijing 100039,China;School of Materials Science and Engineering,Ocean University of China,Qingdao 266100,China)
出处
《中国腐蚀与防护学报》
CAS
CSCD
北大核心
2024年第2期489-496,共8页
Journal of Chinese Society For Corrosion and Protection
基金
国家自然科学基金(42076039)。
关键词
环氧涂层
渗水
弛豫时间分布
有限元模拟
腐蚀机理
epoxy coating
water penetration
distribution of relaxation time
finite element simulation
corrosion mechanism