Study on Corrosion Resistance of Grain Boundary Engineering Windings at Different Temperatures

Abstract

Temperature has a serious effect on the corrosion of windings. Grain boundary engineering (GBE) refers to adjusting the structure of grain boundary network of the copper winding through appropriate deformation and heat treatment, so as to improve the corrosion resistance of the copper winding. In this paper, the winding treated by grain boundary engineering was corroded, and the results showed that the corrosion resistance of the treated winding was improved obviously, and the copper content in insulating oil and on insulating paper was significantly reduced. The breakdown voltage of insulating oil increases obviously and the dielectric loss decreases significantly. Under the same conditions, the influence of the original winding on the insulating oil is more serious. The GBE winding has better corrosion resistance, which reduces the influence of corrosion on the insulating oil performance.