Research on corrosion mechanism of suspension insulator steel foot of direct current system and measures for corrosion inhibition

2017 2nd International Seminar on Advances in Materials Science and Engineering

Chen, He^1 ; Yang, Yueguang^1 ; Su, Guolei^1 ; Wang, Xiaoqing^1 ; Zhang, Hourong^1 ; Sun, Xiaoyu^2 ; Fan, Youping^2

CSG EHV Power Transmission Company, Guangzhou

510663, China^1

School of Electrical Engineering, Wuhan University, Wuhan

430072, China^2

关键词: Corrosion inhibition;    Corrosion mechanisms;    Corrosion products;    Direct current system;    Direct current transmissions;    Extra high voltage;    Laboratory conditions;    Suspension insulators;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/231/1/012076/pdf
DOI  :  10.1088/1757-899X/231/1/012076

来源: IOP

【 摘 要 】

There are increasingly serious electrocorrosion phenomena on insulator hardware caused by direct current transmission due to the wide-range popularization of extra high voltage direct current transmission engineering in our country. Steel foot corrosion is the main corrosion for insulators on positive polarity side of transmission lines. On one hand, the corrosion leads to the tapering off of steel foot diameter, having a direct influence on mechanical property of insulators; on the other hand, in condition of corrosion on steel foot wrapped in porcelain ware, the volume of the corrosion product is at least 50% more than that of the original steel foot, leading to bursting of porcelain ware, threatening safe operation of transmission lines. Therefore, it is necessary to conduct research on the phenomenon and propose feasible measures for corrosion inhibition. Starting with the corrosion mechanism, this article proposes two measures for corrosion inhibition, and verifies the inhibition effect in laboratory conditions, providing reference for application in engineering.