The Effect of Acid Rain on The Tracking Resistance of Organic Insulating Materials

点击翻译按钮获取中文摘要

The effect of acid rain on the tracking resistance of organic insulating materials was studied by the IEC Publication 587 method in this paper. PP,PC,ABS,PS and PVC are evaluated each other after soaked in the solution of artificial acid rain for 20 and 45 days. Time to failure and the contact angle of the samples are investigated. The micro structure of sample surface is observed by SEM.And the tracking process is monitored by thermal video system. Test results show that the longer soaked period in the solution of artificial acid rain, the shorter time to failure and the smaller the contact angle of the samples. The mechanism of the effect of acid rain on the tracking resistance of materials is discussed furthermore. It's suggested that the acid rain can result in severe erosion damages which is mainly caused by the increasing of wetting and the decreasing of thermal resistance of test samples after soaked in acid rain solution.