摘要
为研究复合绝缘子伞裙表面受环境腐蚀的影响,采用等效试验模拟了复合绝缘子腐蚀过程,分析了不同盐密浓度腐蚀条件下绝缘子试样表面的憎水性,测量了绝缘子试样表面的泄露电流,并采用扫描电镜分析了其微观表面形貌.试验结果表明,长期受盐密腐蚀的伞裙表面憎水性随着盐密浓度的增大而减弱;腐蚀会导致伞裙表面电阻下降,泄露电流增大;当盐密浓度为0.06mg/cm^2时,伞裙表面憎水性下降速度最快,表面老化速度也最快;伞裙表面腐蚀后,表面变得粗糙不平,老化程度随着腐蚀时间和腐蚀浓度的增加而加深.
To study the effect of corrosion on the surface of composite insulator umbrella skirt, the corrosion process of the composite insulator is simulated by equivalent test. The surface hydrophobicity of the insulator sample is analyzed under corrosion conditions of different salt concentrations; and the leakage currents of the insulator surface are measured; meanwhile, their micro-topography is analyzed by scanning electron microsco- py （SEM）. The results show that the surface hydrophobicity of the umbrella skirt for a long-term salt corro- sion is weakened with the increase of the salt density. Corrosion can cause the surface resistance of the um- brella skirt to decrease and the leakage current to increase. When the salt concentration is 0.06 mg/cm2 , the hydrophobicity of umbrella skirt surface declines in the fastest, and the aging speed is the fastest. After the surface of the umbrella skirt is corroded, the surface becomes roughness, and the degree of aging deepened with the increase of the corrosion time and corrosion concentration.
作者
赵美云
王磊
赵新泽
习森明
袁泽坤
Zhao Meiyun Wang Lei Zhao Xinze Xi Senming Yuan Zekun(Hubei Key Laboratory of Hydroelectric Machinery Design ＆ Maintenance, China Three Gorges Univ. , Yichang 443002, China Collaborative Innovation Center for Energy Equipment of Three Gorges Region, China Three Gorges Univ. , Yichang 443002, China)
出处
《三峡大学学报（自然科学版）》
CAS
2017年第5期95-99,共5页
Journal of China Three Gorges University：Natural Sciences
基金
国家自然科学基金资助项目(51475264
51605254)
关键词
复合绝缘子
腐蚀
憎水性
泄漏电流
表面形貌
composite insulator
corrosion
hydrophobicity
leakage current
surface morphology
