碱性腐蚀对超疏水涂层绝缘强度的影响  

Effect of alkaline corrosion on insulating strength of superhydrophobic coatings

作　　者：李侣 李宇捷 李黎[3] 王晟伍 LI Lü;LI Yujie;LI Li;WANG Shengwu(State Grid Jiangxi Electric Power Research Institute,Nanchang 330096,China;Nanchang Institute of Technology,Nanchang 330029,China;School of Electrical and Electronics Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]国网江西省电力公司电力科学研究院,江西南昌330096 [2]南昌工程学院,江西南昌330029 [3]华中科技大学电气与电子工程学院,湖北武汉430074

出　　处：《绝缘材料》2023年第9期83-88,共6页Insulating Materials

摘　　要：为了探究碱性腐蚀对超疏水涂层绝缘强度的影响,本研究制备了具有绝缘性能的超疏水涂层试样,并对其进行人工碱性腐蚀试验。对不同腐蚀程度的超疏水涂层试样的绝缘强度进行测试,并研究了不同温度下染污程度、外加电压幅值和表面污秽润湿程度对其绝缘强度的影响。结果表明:碱性环境会破坏超疏水涂层表面的物质和结构,导致其疏水性和自清洁性能下降,进而导致其绝缘强度下降。在脏污湿润环境下受到碱性腐蚀的超疏水涂层表面染污程度越严重、外加电压越高、表面污秽润湿时间越短,涂层表面的绝缘强度越低。碱性腐蚀超疏水涂层表面染污程度随着润湿时间的增加逐渐下降至稳定值,此时涂层的表面泄漏电流不发生明显变化,且碱性腐蚀环境温度越低,达到上述稳定状态所需的润湿时间越短。In order to investigate the effect of alkaline corrosion on the insulating strength of superhydrophobic coatings,superhydrophobic coating specimens with insulating properties were prepared and subjected to artificial alkaline corrosion tests.The insulating strength of the superhydrophobic coating specimens with different corrosion degrees was tested,and the effects of pollution degree,applied voltage amplitude,and wetting degree of surface contaminants on their insulating strength under different temperatures were investigated.The results show that the alkaline environment will destroy the substance and structure of superhydrophobic coating surface,leading to the decrease of its hydrophobicity and self-cleaning capability,which in turn leads to the decrease of its insulating strength.The more serious the surface pollution degree of the alkaline-corroded superhydrophobic coating under wet and polluting environment,the higher the applied voltage,and the shorter the wetting time,the lower the insulating strength of the coating surface.The surface pollution degree of the alkaline-corroded superhydrophobic coatings gradually decreases to a stable value with the increase of wetting time,at this time the surface leakage current of the coating does not change significantly,and the lower the temperature of alkaline corrosion environment,the shorter the wetting time required to reach the above stable state.

关 键 词：碱性腐蚀 超疏水涂层 防污闪 绝缘强度 

分 类 号：TM215[一般工业技术—材料科学与工程]