摘要
利用失重法、极化曲线和电化学阻抗谱研究了交流杂散电流对环氧树脂涂层在不同pH和氯离子环境中的浸泡失效的影响。结果表明:在1~5 V交流干扰情况下,环氧树脂涂层比没有干扰情况下的更快失效,并且随着交流干扰电压的增大,涂层吸水量增加,基体金属腐蚀更加严重;在3 V交流干扰条件下,酸性环境和氯离子含量的增大,都会使该涂层更容易失效,金属基体腐蚀也更加严重。
The effect of alternating stray current on degradation of epoxy powder coating in environments with different pH values and chloride ion concentrations was studied by weight loss method,polarization curves and electrochemical impedance spectroscopy. The experimental results show that the degradation of epoxy powder coating in the presence of alternating current（ AC） was faster than that without AC interference. With the AC interference voltage increased in the range of 1-5 V,the water absorption of the coating increased and the corrosion of the substrate metal was more serious. When the AC interference voltage was 3 V,the acidic environment and the increase of chloride ion concentration made the degradation of the coating happen more easily and made the metal substrate corrode more seriously.
作者
丁清苗
李自力
DING Qingmiao;LI Zili(China University of Petroleum,Qingdao 266555,China;Civil Aviation University of China,Tianiin 300300,China)
出处
《腐蚀与防护》
CAS
北大核心
2018年第10期776-781,787,共7页
Corrosion & Protection
基金
中央高校基本科研业务费专项资金(3122017038)
广西高校北部湾石油天然气资源有效利用重点实验室开放课题基金资助(2016KLOG21)
关键词
环氧树脂涂层
失效
交流杂散电流
PH
氯离子
epoxy powder coating
degradation
alternate stray eurrent
pH
chloride ion
