无溶剂环氧煤焦沥青涂层在模拟土壤溶液中的电化学行为

姚竟迪1; 梁成浩*1; 黄乃宝1; 吴建华2; 孙振业1

doi:10.16411/j.cnki.issn1006-7736.2015.01.023

大连海事大学学报 >

2015 , Vol. 41 >Issue 1: 124 - 128

DOI: https://doi.org/10.16411/j.cnki.issn1006-7736.2015.01.023

船舶与海洋工程

无溶剂环氧煤焦沥青涂层在模拟土壤溶液中的电化学行为

姚竟迪¹ ,
梁成浩^*1 ,
黄乃宝¹ ,
吴建华² ,
孙振业¹

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(1.大连海事大学交通运输装备与海洋工程学院，辽宁大连 116026；2.中船重工七二五研究所海洋腐蚀与防护国防科技重点实验室, 福建厦门 361101）

姚竟迪（1989-），女，硕士生.

收稿日期: 2014-07-18

修回日期: 2014-09-01

网络出版日期: 2014-09-01

基金资助

国家自然科学基金资助项目（21276036）；中央高校基本科研业务费专项资金资助项目（3132014323）.

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Electrochemical behavior of solvent-free coal tar epoxy coating in simulated soil solution

YAO Jing-di¹ ,
LIANG Cheng-hao^*1 ,
HUANG Nai-bao¹ ,
WU Jian-hua² ,
SUN Zhen-ye¹

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(1. Transportation Equipments ＆ Ocean Engineering College，Dalian Maritime University，Dalian 116026，China; 2.State Key Laboratory for Marine Corrosion and Protection，China Shipbuilding Industry 725 Research Institute，Xiamen 361101，China)

Received date: 2014-07-18

Revised date: 2014-09-01

Online published: 2014-09-01

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摘要

采用电化学测试技术考察无溶剂环氧煤焦沥青涂层在模拟滨海氯盐土溶液中的电化学行为.结果表明，模拟滨海氯盐土溶液中，无溶剂环氧煤焦沥青的开路电位随涂层厚度的增加呈上升趋势，说明涂层厚度的增加提高了侵蚀性溶液的屏蔽阻挡能力.600μm无溶剂环氧煤焦沥青涂层在模拟滨海氯盐土溶液中浸泡30 d内，侵蚀性介质仍没有渗透到涂层-金属基体界面处，交流阻抗谱图显示单容抗弧，阻抗值为8×10⁸ Ω·cm²，表明涂层形成了高电阻、低电容的有效屏蔽层，对Q235碳钢基体起到有效的防护作用.

关键词： 无溶剂环氧煤焦沥青涂层; 模拟土壤溶液; 电化学行为; 电化学阻抗谱（EIS）

本文引用格式

姚竟迪¹ , 梁成浩^*1 , 黄乃宝¹ , 吴建华² , 孙振业¹ . 无溶剂环氧煤焦沥青涂层在模拟土壤溶液中的电化学行为[J]. 大连海事大学学报, 2015 , 41(1) : 124 -128 . DOI: 10.16411/j.cnki.issn1006-7736.2015.01.023

Abstract

By electrochemical techniques, the electrochemical behavior of the solvent-free epoxy coal tar coating was investigated in a simulated chlorine coastal saline solution. Results show that the open circuit potential of the solventfree epoxy coal tar coating increase with coating thickness in simulated coastal saline solution, which indicate that the increase of coating thickness improved its shielding effect for preventing the corrosive solution. There is no corrosive solution in coating/substrate interface after the coating with 60μm immersed in simulated chlorine coastal saline solution for 30 days. There is only one capacitive reactance arc on EIS at open circuit potential and the resistance is 8×10⁸ Ω·cm², which mean the coating has formed an effective shield with high resistor and low capacitor. So it can provide an effective protection for Q235 carbon steel.

Key words： solvent-free epoxy coal tar coating; simulated soil solution; electrochemical behavior; electrochemical impedance spectroscopy（EIS）

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