Electrochemical impedance spectroscopy of inorganic/organic composite coatings in 3.5%NaCl solution

LIU Xuwen; XIONG Jinping; CAO Jingyi; ZUO Yu

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Electrochemical impedance spectroscopy of inorganic/organic composite coatings in 3.5%NaCl solution

更新时间：2025-12-10

- Electrochemical impedance spectroscopy of inorganic/organic composite coatings in 3.5%NaCl solution
- CIESC Journal Issue 9, Pages: 2288-2292(2007)
- 作者机构：
  
  1. 北京化工大学材料科学与工程学院
  2. 海军涂料分析检测中心
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 September 2007，
  
  Published：05 September 2007
- 稿件说明：
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LIU Xuwen, XIONG Jinping, CAO Jingyi, et al. Electrochemical impedance spectroscopy of inorganic/organic composite coatings in 3.5%NaCl solution[J]. CIESC Journal, 2007, (9): 2288-2292.
DOI：

LIU Xuwen, XIONG Jinping, CAO Jingyi, et al. Electrochemical impedance spectroscopy of inorganic/organic composite coatings in 3.5%NaCl solution[J]. CIESC Journal, 2007, (9): 2288-2292. DOI：

摘要

采用电化学阻抗谱（EIS）研究了无机富锌底漆/环氧云铁中间漆/氯化橡胶面漆复合涂层体系在3.5%NaCl溶液中的腐蚀电化学行为，考察了紫外辐射对其电化学行为的影响。结果表明：复合涂层体系在3.5%NaCl介质中的腐蚀失效过程可以用4种等效电路来等效。浸泡失效前120 h，电解质溶液电阻Rc从开始的5×109 Ω·cm2以大约2.2×107 Ω·h-1的速度迅速下降到4×105 Ω·cm2，到浸泡120 h后Rc则以较小的速度808 Ω·h-1下降，涂层电容Cc是按线性增加。紫外辐射不改变复合涂层体系在3.5% NaCl溶液中的电化学行为，仅仅加速复合涂层的失效。

Abstract

The corrosion electrochemical behavior of composite coatings system composed of inorganic zinc-rich primer，epoxy middle paste and chlorinated rubber top coating in 3.5% NaCl solution was studied with electrochemical impedance spectroscopy（EIS）.The effect of UV irradiation on the electrochemical behavior was investigated.The results showed that the corrosion process of the composite coatings in 3.5% NaCl solution could be described in the form of four equivalent circuits.The Rc of composite coatings decreased linearly at a rate of 2.2×107 Ω·h-1 and 808 Ω·h-1 before and after 120 h respectively，but the Cc of the coatings increased linearly.UV irradiation could accelerate the aging of the coatings but did not affect the electrochemical behavior in the solution.

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