Nowadays, end fitting corrosion reduces the mechanical strength and flashover voltage of insulators, forming a huge threat to high-voltage direct current transmission lines. At present, the parameters of electrolytic corrosion inhibition measures are selected based on the premise of the constant annual corrosion rate. However, with the development of corrosion, corrosion products accumulate on the insulator surface, which may impact the corrosion rate. In order to clarify the influence of corrosion products, this work studied how corrosion products influence the corrosion rate from the corrosion phenomenon, corrosion current, feature and formation of corrosion products. The results showed that corrosion products of iron and zinc were excellent in adhesion on the insulator surface and could not be cleaned by rain, which was able to increase the corrosion rate. In future, in the selection of the quality of the zinc ring bonded on insulator fittings, there will be a demand to consider the influence of corrosion products on the corrosion rate.

中文翻译：

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绝缘子表面电解腐蚀产物的形成及影响分析

如今，端部接头腐蚀降低了绝缘子的机械强度和闪络电压，对高压直流输电线路构成了巨大威胁。目前，电解缓蚀措施的参数选择是在年腐蚀速率恒定的前提下进行的。然而，随着腐蚀的发展，腐蚀产物会在绝缘子表面积累，这可能会影响腐蚀速率。为了阐明腐蚀产物的影响，本工作从腐蚀现象、腐蚀电流、腐蚀产物的特征和形成等方面研究了腐蚀产物对腐蚀速率的影响。结果表明，铁和锌的腐蚀产物在绝缘子表面附着力极好，雨水不能清洗，这能够增加腐蚀速率。今后在绝缘子配件上粘接锌环的质量选择中，将需要考虑腐蚀产物对腐蚀速率的影响。