• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

电力建设 ›› 2013, Vol. 34 ›› Issue (8): 95-99.doi: 10.3969/j.issn.1000-7229.2013.08. 018

• 设备与材料 • 上一篇    下一篇

架空输电线路金具腐蚀分析及防护对策

陈军君,胡加瑞,谢亿,胡波涛   

  1. 湖南省电力公司科学研究院,长沙市 410007
  • 出版日期:2013-08-01
  • 作者简介:陈军君(1982),男,硕士,工程师,主要从事电网输变电材料和材料保护方面的工作,E-mail:chengjie0082@163.com; 胡加瑞(1984),男,硕士,工程师,主要从事电网金属监督与事故分析工作,E-mail:564802374@qq.com; 谢亿(1982),男,博士,工程师,从事电站及电网金属监督与事故分析工作,E-mail:yxie001@126.com; 胡波涛(1965),男,本科,高级工程师,主要研究金属材料技术和工程经济,E-mail:hbt06@163.com。
  • 基金资助:

    国家电网公司科技项目(KG12K16004)。

Corrosion Analysis and Protection Measures for Fittings of Overhead Power Transmission Lines

CHEN Junjun, HU Jiarui, XIE Yi,HU Botao   

  1. Hunan Electric Power Corporation Research Institute, Changsha 410007, China
  • Online:2013-08-01

摘要:

架空输电线路金具的腐蚀速度一般较快,且位于高空不便维护。为此,以广西、湖南地区架空输电线路金具腐蚀为例,通过宏观形貌检查、力学性能实验、X衍射物相分析、电子显微分析、电化学测试和镀锌层厚度测量,分析金具的腐蚀机理和规律,提出了有针对性的金具腐蚀防护对策。分析结果表明:金具腐蚀引发截面尺寸减小、抗拉强度降低、材质变脆这3种失效形式;硫是促进金具腐蚀的关键因素,拉应力和微动摩擦也加剧了金具的腐蚀。因此,在腐蚀较重的工业区,为保障电网运行安全,金具应采取加强防腐措施,镀锌厚度宜增加到192 μm以上。

关键词: 输电线路, 金具, 腐蚀, 防护

Abstract:

For overhead power transmission lines, the fittings' corrosion rate is fast and maintenance is inconvenient due to the high altitude. The fittings of overhead transmission lines in Hunan and Guangxi province were investigated by means of macro-morphology examinations, mechanical property tests, X-ray diffraction (XRD), scanning electron microscope (SEM), electrochemical tests and zinc coating thickness measurement. Then the mechanism and behavior of fittings corrosion were discussed and the protection measures were proposed. The results show that three failure forms of cross section size decreasing, tensile strength decreasing and material brittle are caused by fittings corrosion; sulfur is the critical factor of fitting corrosion; the fittings corrosion is increased by both tensile stress and fretting friction. Therefore, the anti-corrosion measures for fittings in heavycorrosion industrial areas should be strengthened and the zinc coating thickness should be increased to more than 192 μm, in order to ensure the safety operation of power grid.

Key words: power transmission line, fittings, corrosion, protection