基于弛豫时间分布和有限元模拟的环氧涂层渗水行为研究

doi:10.11902/1005.4537.2023.131

中国腐蚀与防护学报

2024, Vol. 44

Issue (2): 489-496 CSTR: 32134.14.1005.4537.2023.131 DOI: 10.11902/1005.4537.2023.131

研究报告

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基于弛豫时间分布和有限元模拟的环氧涂层渗水行为研究

韩东晓¹, 纪文会², 王通², 王巍²(

)

^1.北京航天新立科技有限公司北京 100039
^2.中国海洋大学材料科学与工程学院青岛 266100

Water Penetration Behavior of Epoxy Coating Based on Distribution of Relaxation Time and Finite Element Simulation

HAN Dongxiao¹, JI Wenhui², WANG Tong², WANG Wei²(

)

^1.Beijing Shiny Tech. Co. Ltd., Beijing 100039, China
^2.School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China

引用本文:

韩东晓, 纪文会, 王通, 王巍. 基于弛豫时间分布和有限元模拟的环氧涂层渗水行为研究[J]. 中国腐蚀与防护学报, 2024, 44(2): 489-496.
Dongxiao HAN, Wenhui JI, Tong WANG, Wei WANG. Water Penetration Behavior of Epoxy Coating Based on Distribution of Relaxation Time and Finite Element Simulation[J]. Journal of Chinese Society for Corrosion and protection, 2024, 44(2): 489-496.

全文: PDF(4848 KB) HTML

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。

关键词 ：环氧涂层, 渗水, 弛豫时间分布, 有限元模拟, 腐蚀机理

Abstract：

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.

Key words： epoxy coating water penetration distribution of relaxation time finite element simulation corrosion mechanism

收稿日期: 2023-05-04 32134.14.1005.4537.2023.131

ZTFLH:

TG174

基金资助:国家自然科学基金(42076039)

通讯作者: 王巍，E-mail：wangwei8038@ouc.edu.cn，研究方向为海洋腐蚀与防护

Corresponding author: WANG Wei, E-mail: wangwei8038@ouc.edu.cn

作者简介: 韩东晓，男，1986年生，博士，高级工程师

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https://www.jcscp.org/CN/10.11902/1005.4537.2023.131 或 https://www.jcscp.org/CN/Y2024/V44/I2/489

图1 环氧涂层渗水过程的EIS图

图2 环氧涂层渗水过程的等效电路模型

图3 环氧涂层渗水过程的DRT图

图4 环氧涂层渗水过程的DRT分峰图

表1 环氧涂层渗水过程的DRT分析时间常数位置和面积比

图5 环氧涂层渗水过程的OCP和|Z|0.01 Hz变化图

图6 环氧涂层渗水过程的涂层电容Cc变化图

图7 环氧涂层渗水过程位置监测点的Cl-浓度变化模拟曲线

图8 环氧涂层渗水过程的Cl-浓度变化模拟图

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