Composite insulators operating in special industrial dust areas are prone to the corrosion and ablation of shed during operation due to the presence of such components of water absorbing substance as metal particles

acid corrosive substance sand sugars. In order to study the influence of the corrosion and ablation of the shed on the aging of the composite insulator during the long-term operation

the composite insulator out of operation in a special industrial dust area is sampled

the shed of composite insulator with typical appearance characteristics is selected and sampling and comparative analysis are performed on the surface and interior of the samples respectively. Meanwhile

insulators with complete appearance and those with serious ablation are selected for comparative analysis. By Fourier transform infrared spectroscopy

X-ray photoelectron spectroscopy and other analytical methods

the changes of organic functional group

elemental proportions and valence before and after the high-temperature vulcanized silicone rubber ablation and aging are studied

the erosion characteristics of composite insulators operating in special industrial dust areas and their effects on the aging properties of insulator itself are obtained

which provide a feasible reference for the prediction of the operating conditions of composite insulators in special areas.