Corossion failure analysis on cotter pins used for fittings of 500kV transmission tower. Issue 1 (May 2021)

• Record Type: Journal Article
• Authors: Hao, Chen; Xin, Du; Wei, Sun; Xin, Qiao; Xinai, Guo
• Is Part Of: Journal of physics. Volume 1939:Issue 1(2021)
• Publication Date: 2021-05
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/1939/1/012028
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: Transmission line is an important part of power system and plays a key role in the process of power transmission and distribution. As the skeleton of the transmission line, the reliability of the transmission tower is an important guarantee for the safe and stable operation of the power grid. In this paper, the corroded cotter pins of fittings used for 500kV transmission tower was investigated by means of macro-morphology inspection, chemical composition analysis, scanning electron micrograph analysis, microstructure analysis and energy spectrum analysis. The result showed that the misuse of material for cotter pins and sulfide discharged from industrial production were the main causes of corrosion of the cotter pins.