环氧富锌涂层防腐蚀性能研究

doi:10.11902/1005.4537.2019.231

中国腐蚀与防护学报

2019, Vol. 39

Issue (6): 563-570 DOI: 10.11902/1005.4537.2019.231

研究报告

本期目录 | 过刊浏览

环氧富锌涂层防腐蚀性能研究

赵书彦¹,童鑫红²,刘福春¹(

),翁金钰²,韩恩厚¹,郦晓慧³,杨林³

1. 中国科学院金属研究所中国科学院核用材料与安全评价重点实验室沈阳 110016
2. 福建华电可门发电有限公司福州 364400
3. 华电电力科学研究院有限公司杭州 310030

Corrosion Resistance of Three Zinc-rich Epoxy Coatings

ZHAO Shuyan¹,TONG Xinhong²,LIU Fuchun¹(

),WENG Jinyu²,HAN En-Hou¹,LI Xiaohui³,YANG Lin³

1. Key Laboratory of Nuclear Materials and Safety Evaluation, Chinese Academy of Sciences, Shenyang 110016, China
2. Fujian Huadian Kemen Power Generation Co. , Ltd. , Fuzhou 364400, China
3. Huadian Electric Power Research Institute Co. , Ltd. , Hangzhou 310030, China

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摘要:

制备了添加纳米SO₂材料的纳米复合环氧富锌涂层，通过测试金属Zn含量、拉开法附着力、浸泡实验、盐雾实验和电化学阻抗谱实验，并与两种未添加纳米材料的环氧富锌涂层防腐蚀性能进行对比研究，结果表明，纳米复合环氧富锌涂层具有良好的附着力和内聚力，前期可以作为有机屏蔽层，中期阴极保护作用温和，持续时间长，后期Zn的反应产物又可以提供涂层良好的屏蔽，耐腐蚀性能显著，而未添加纳米材料的两种富锌涂层由于起泡和锈蚀而失效。

关键词 ：涂层失效, 环氧富锌涂层, 阴极保护, 耐腐蚀, 电力设施, 沿海环境

Abstract：

Nano-composite coatings composed of nano-silica materials and Zn-rich epoxy coating were prepared, and their corrosion resistance was comparatively assessed with two zinc-rich epoxy coatings without addition of nano-silica by means of pull-off test for adhesion, immersion test, salt spray test and electrochemical impedance spectroscopy, as well as Zn content measurement. The results show that nanocomposite coatings have good performance in adhesion and cohesion, and they can act as good organic barrier to inward migration of corrosive species in the early corrosion stage, then present a moderate cathodic protection effect for a long term in the middle stage and finally the corrosion product of Zn can provide good barrier effect in the later stage, in the contrast, the two zinc-rich epoxy coatings without addition of nano-silica may prematurly break down due to blistering and rusting.

Key words： coating failure Zn-rich epoxy coating cathodic protection corrosion resistant power facility coastal environment

收稿日期: 2019-03-19

ZTFLH:

TG174

基金资助:中国华电公司科技项目和沈阳市科技计划项目(Y17-1-039)

通讯作者: 刘福春 E-mail: fcliu@imr.ac.cn

Corresponding author: Fuchun LIU E-mail: fcliu@imr.ac.cn

作者简介: 赵书彦，女，1978年生，工程师

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引用本文:

赵书彦,童鑫红,刘福春,翁金钰,韩恩厚,郦晓慧,杨林. 环氧富锌涂层防腐蚀性能研究[J]. 中国腐蚀与防护学报, 2019, 39(6): 563-570.
Shuyan ZHAO, Xinhong TONG, Fuchun LIU, Jinyu WENG, En-Hou HAN, Xiaohui LI, Lin YANG. Corrosion Resistance of Three Zinc-rich Epoxy Coatings. Journal of Chinese Society for Corrosion and protection, 2019, 39(6): 563-570.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2019.231 或 https://www.jcscp.org/CN/Y2019/V39/I6/563

图1 涂层附着力测试形貌

表1 涂层附着力数据表

图2 3种涂层试样盐雾实验1000 h后的形貌

图3 3种涂层试样盐雾实验1000 h后划痕处截面的SEM像

图4 3种涂层试样盐雾实验1000 h后划痕处截面的EDS谱

图5 3种涂层试样盐雾实验1000 h后表面的微观形貌

图6 3种涂层试样浸泡实验1500 h后的形貌

图7 涂层试样自腐蚀电位在3.5%NaCl溶液中不同浸泡时间的变化曲线

图8 涂层试样的Nyquist图和Bode图

图9 等效电路图

图10 电阻和电容随浸泡时间的变化曲线

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