Tracking Characteristics and Surface Erosion Condition of Epoxy Resin for Dry-type Reactor

Aiming at the deterioration of epoxy resin cast insulation in outdoor dry reactor under the action of long term electrical indentation partial discharge. The electrical indentation experiment platform of insulating material under inclined plate method was set up. The characteristics of electrical indentation discharge and the corrosion loss of insulating material were measured and analyzed. The characteristics of partial discharge (PD), corrosion loss, hydrophobicity and surface roughness were measured experimentally. The surface morphology, 3D morphology and Fourier transform infrared (FTIR) images of epoxy resin insulating materials at different stages after discharge erosion were analyzed. Different contents were studied. The results show that the electric in-dentation process of epoxy resin insulation material has experienced initial, stable, developing and explosive phases, and the flashover discharge. With the change of the surface morphology and the formation of the surface products, the surface roughness of the materials showed an overall upward trend, and the surface roughness increased fastest during the discharge burst. The changes of surface morphology and 3D morphology of material constitute the basis for judging the insulating surface condition and corrosion damage development condition.