淡水舱涂层在不同水环境中的失效行为研究

doi:10.11902/1005.4537.2021.008

中国腐蚀与防护学报

2021, Vol. 41

Issue (2): 209-218 DOI: 10.11902/1005.4537.2021.008

研究报告

本期目录 | 过刊浏览

淡水舱涂层在不同水环境中的失效行为研究

曹京宜¹, 杨延格²(

), 方志刚¹, 寿海明³, 李亮¹, 冯亚菲¹, 王兴奇², 褚广哲¹, 赵伊¹

^1.中国人民解放军92228部队北京 100072
^2.中国科学院金属研究所师昌绪先进材料创新中心沈阳 110016
^3.中国人民解放军92942部队北京 100161

Failure Behavior of Fresh Water Tank Coating in Different Water

CAO Jingyi¹, YANG Yange²(

), FANG Zhigang¹, SHOU Haiming³, LI Liang¹, FENG Yafei¹, WANG Xingqi², CHU Guangzhe¹, ZHAO Yi¹

^1.Unit 92228, People's Liberation Army, Beijing 100072, China
^2.Shi -changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
^3.Unit 92942, People's Liberation Army, Beijing 100161, China

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摘要:

利用附着力测试、吸水率测试和电化学阻抗谱测试等手段，研究了淡水舱涂层在反渗透水、调质水、自来水等淡水以及盐水中的腐蚀失效行为。结果表明，自来水比盐水具有更快的渗透速度，导致涂层在淡水中会优先失效。淡水舱涂层在反渗透水、调质水和饮用水3种淡水中的腐蚀失效历程相同，根据电化学阻抗谱的变化特征可分为3个阶段：水的快速渗透、涂层/金属界面金属基体的腐蚀和涂层中颜填料对金属的缓蚀。

关键词 ：涂层, 淡水, 腐蚀, 电化学阻抗谱

Abstract：

Failure behavior of epoxy coating used for fresh water tank, namely epoxy coating/Q235 carbon steel, in different media including three different fresh water and one kind of salt water was investigated by means of adhesion test, water absorption test and electrochemical impedance spectroscopy. Failure of the epoxy coating in fresh water was earlier than that in salt water owing to the faster penetration rate. The failure process of the epoxy coating in fresh waters, including reverse osmosis water, conditioning water and drinking water was similar, and can be differentiated as the following three stages: the quick penetration of water, corrosion of the substrate at the interface of coating/steel and the corrosion inhibition of pigments in the coating.

Key words： coating fresh water corrosion electrochemical impedance spectroscopy

收稿日期: 2021-01-13

ZTFLH:

TG174

通讯作者: 杨延格 E-mail: ygyang@imr.ac.cn

Corresponding author: YANG Yange E-mail: ygyang@imr.ac.cn

作者简介: 曹京宜，女，1972年生，研究员

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引用本文:

曹京宜, 杨延格, 方志刚, 寿海明, 李亮, 冯亚菲, 王兴奇, 褚广哲, 赵伊. 淡水舱涂层在不同水环境中的失效行为研究[J]. 中国腐蚀与防护学报, 2021, 41(2): 209-218.
Jingyi CAO, Yange YANG, Zhigang FANG, Haiming SHOU, Liang LI, Yafei FENG, Xingqi WANG, Guangzhe CHU, Yi ZHAO. Failure Behavior of Fresh Water Tank Coating in Different Water. Journal of Chinese Society for Corrosion and protection, 2021, 41(2): 209-218.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2021.008 或 https://www.jcscp.org/CN/Y2021/V41/I2/209

表1 两种淡水的性质

图1 淡水舱涂层在盐水和饮用水中湿态附着力随时间的变化

图2 盐水和饮用水浸泡环境下拉拔测试后淡水舱涂层典型的宏观形貌

图3 淡水舱涂层在盐水和饮用水中的水传输动力学曲线

图4 淡水舱涂层在盐水和饮用水开路电位随时间的变化

图5 淡水舱涂层在盐水中浸泡不同时间的电化学阻抗谱

图6 淡水舱涂层在饮用水中浸泡不同时间的电化学阻抗谱

图7 淡水舱涂层在盐水和饮用水中电化学阻抗谱低频模值随时间的变化

图8 淡水舱涂层在不同淡水中附着力随浸泡时间的变化

图9 淡水舱涂层在反渗透水和调制水中浸泡不同时间附着力测试后的宏观形貌

图10 淡水舱涂层在3种不同淡水环境的水传输动力学曲线

图11 淡水舱涂层在3种淡水环境中开路电位随浸泡时间的变化

图12 淡水舱涂层在反渗透水中浸泡不同时间的电化学阻抗谱

图13 淡水舱涂层在调质水中浸泡不同时间的电化学阻抗谱

图14 淡水舱涂层腐蚀失效过程中低频阻抗模值随时间的的变化

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