直流杂散电流对环氧树脂涂层浸泡失效的影响
Effect of Direct Stray Current on Degradation of Epoxy Resin Coating in Immersion
摘 要
利用浸泡试验、电化学测试等技术研究了直流杂散电流对环氧树脂涂层在不同pH和氯离子环境中浸泡失效的影响。结果表明：施加直流干扰会加速环氧树脂涂层失效，在1~5 V直流干扰情况下，随着直流干扰电压的增大，该涂层的吸水量增加，失效更加严重；在直流干扰电压为3 V的中性环境中，该涂层的吸水量最大，但在酸性环境中环氧树脂涂层更容易失效；随着氯离子含量的增大，涂层失效情况加剧，而吸水量呈现先增大后减小的趋势。
失效
直流杂散电流
pH
氯离子
epoxy resin coating
degradation
direct stray current
pH
chloride ion
Abstract
The effect of direct stray current on the degradation of epoxy resin coating in the environment with different pH values and chloride ion concentrations was studied by immersion test and electrochemical testing. The results show that the degradation of epoxy resin coating in the presence of direct current was accelerated. As the direct current (DC) interference voltage increased in the range of 1-5 V, the water absorption of the coating increased and the degradation was more serious. At DC interference voltage of 3 V the coating got the largest water absorption in neutral environment, but the degradation of the coating failed more easily in acidic environment. With the increase of chloride ion concentration the degradation of the coating became more serious and the water absorption increased first and then decreased.
中图分类号 TG172 DOI 10.11973/fsyfh-201810007
所属栏目 环氧树脂涂层
基金项目
收稿日期 2017/7/15
修改稿日期
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引用该论文: CUI Yanyu,WANG Yujun,DING Qingmiao. Effect of Direct Stray Current on Degradation of Epoxy Resin Coating in Immersion[J]. Corrosion & Protection, 2018, 39(10): 770
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参考文献
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【9】张明,余建飞,张予,等. 低强度直流杂散电流对Q235钢在SO2大气中腐蚀行为的影响[J]. 材料保护,2015,48(9):18-21.
【10】闫爱军,陈沂,冯拉俊,等. 几种接地网材料在土壤中的腐蚀特性研究[J]. 腐蚀科学与防护技术,2010,22(3):197-199.
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