典型工业区输电线路金具腐蚀失效分析
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摘要
对某500 kV输电线路金具腐蚀试样进行力学实验、XRD分析、SEM分析和电化学测试,研究了典型工业区金具的腐蚀机理。结果显示,S是引起金具腐蚀的关键因素,通过形成可溶性硫酸盐促进了镀锌保护膜的消耗,另外拉应力和微动腐蚀也对金具腐蚀有影响。结合广西、湖南地区的酸雨数据和金具腐蚀情况验证了该结论,提出了工业区金具的防护措施。
Failed fitting samples of a 500 kV electric power transmission line was investigated by means of mechanical property test, electrochemical test, as well as SEM and XRD characterization.The results show that sulfur is the critical factor of fittings corrosion. It forms soluble sulfate to consume zinc coatings faster. Furthermore, tensile stress and fretting corrosion also affect the fittings corrosion. The conclusions coincide fairly well with the service situations of fittings in terms of acid rain and corrosion in the relevant areas of Guangxi and Hunan province. Then anti- corrosion measures for fittings in industrial areas are proposed.
Failed fitting samples of a 500 kV electric power transmission line was investigated by means of mechanical property test, electrochemical test, as well as SEM and XRD characterization.The results show that sulfur is the critical factor of fittings corrosion. It forms soluble sulfate to consume zinc coatings faster. Furthermore, tensile stress and fretting corrosion also affect the fittings corrosion. The conclusions coincide fairly well with the service situations of fittings in terms of acid rain and corrosion in the relevant areas of Guangxi and Hunan province. Then anti- corrosion measures for fittings in industrial areas are proposed.
引文
[1]彭泉光,刘南生.北海地区沿海架空电力线路铁塔及金具的腐蚀分析[J].广西电力技术,1991,4:39
[2]车德竞,张万友,张大全等.输电线路合成绝缘子端部金具的腐蚀研究[J].腐蚀与防护,2004,25(11):461
[3]全国架空线路标准化技术委员会.GB/T 2314-2008电力金具通用技术条件[S].北京:中国标准出版社,2008
[4]黄建中,左禹.材料的耐蚀性和腐蚀数据[M].北京:化学工业出版社,2003:406
[5]王安群,邹润莉,罗文华等.湖南省酸雨污染现状特征分析及发展趋势研究[J].绿色科技,2011,5:3
[6]邵天晓.架空送电线路的电线力学计算[M].北京:中国电力出版社,2009:365
[7]黎学明,刘强,孔令峰等.模拟酸雨溶液中应力对镀锌钢绞线腐蚀行为影响[J].腐蚀科学与防护技术,2008,20(1):44
[8]徐丽,陈跃良,卞贵学等.铝合金微动腐蚀损伤机制及防护措施[J].腐蚀科学与防护技术,2012,24(3):256
[9]Zhou Z R,Cardou A,Goudreau S,et a1.Fundamental investigations of electrical conductor fretting fatigue[J].Tribol.Int.,1996,29:221
[2]车德竞,张万友,张大全等.输电线路合成绝缘子端部金具的腐蚀研究[J].腐蚀与防护,2004,25(11):461
[3]全国架空线路标准化技术委员会.GB/T 2314-2008电力金具通用技术条件[S].北京:中国标准出版社,2008
[4]黄建中,左禹.材料的耐蚀性和腐蚀数据[M].北京:化学工业出版社,2003:406
[5]王安群,邹润莉,罗文华等.湖南省酸雨污染现状特征分析及发展趋势研究[J].绿色科技,2011,5:3
[6]邵天晓.架空送电线路的电线力学计算[M].北京:中国电力出版社,2009:365
[7]黎学明,刘强,孔令峰等.模拟酸雨溶液中应力对镀锌钢绞线腐蚀行为影响[J].腐蚀科学与防护技术,2008,20(1):44
[8]徐丽,陈跃良,卞贵学等.铝合金微动腐蚀损伤机制及防护措施[J].腐蚀科学与防护技术,2012,24(3):256
[9]Zhou Z R,Cardou A,Goudreau S,et a1.Fundamental investigations of electrical conductor fretting fatigue[J].Tribol.Int.,1996,29:221