Analysis of the causes of fracture of metal parts of 220KV transmission towers and protective measures

Abstract

The corrosion causes of a 220kV transmission tower grounding flat steel were experimentally analyzed by macroscopic inspection, chemical composition analysis, microscopic structure inspection, corrosion product morphology and energy spectrum, galvanized layer thickness test, soil physical and chemical property analysis, and other test methods. The results indicate that the combined effect of chemical and electrochemical corrosion of the soil and stray current corrosion has resulted in the development of severe corrosion damage, which has ultimately led to the failure of the grounding flat steel. Furthermore, the requisite protective measures and recommendations are provided for the aforementioned scenarios.