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变电站土壤腐蚀性评价及接地网金属腐蚀特性分析 被引量:35

Soil Corrosion Evaluation of Substation and Metal Corrosion Characteristics Analysis For Grounding Grid
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摘要 变电站土壤的腐蚀性与接地网金属服役寿命密切相关。分析了某变电站接地网11个典型部位土壤样品的电阻率、氧化还原电位、含水量、含盐量、pH值、Cl-、SO42-、HCO3-、Na+、Ca2+、Mg2+等理化指标,根据相关标准分析、评估该变电站土壤腐蚀性;同时用扫描电镜(SEM)、能谱(EDAX)分析了该变电站接地网金属样品腐蚀特性,认为:土壤的腐蚀性决定于土壤电阻率、氧化还原电位及Cl-、SO42-含量,许多情况下,Cl-与SO42-对接地网金属腐蚀起到促进作用。并提出了防腐方法。 The soil corrosiveness of substation was closely bound up with the service life of grounding grid metals. The physics and chemistry index of soil samples from 11 typical parts of a substation, including resistance, redox potential, water content, salt content, pH value, Cl-, SO4^2-, HCO3-, Na+, Ca2+, Mg2+ were analyzed, the soil corrosion property were analyzed and evaluated by related standard. Meanwhile, the corrosion characteristics of grounding grid metal samples were analyzed by scanning electron microscope (SEM) and energy dispersive analysis of xray (EDAX). Thus the findings are the soil corrosion properties depend on soil resistance, redox potential and content of Cl- and SO4^2-. In many situations, Cl- and SO4^2- accelerate the methods were proposed. corrosion of grounding grid metal. The anti-corrosion
出处 《电瓷避雷器》 CAS 北大核心 2009年第4期18-22,26,共6页 Insulators and Surge Arresters
基金 湖南省自然科学基金(编号:09JJ) 湖南省教育厅科技项目(编号04C109)
关键词 接地网 土壤腐蚀性 防腐特性分析 grounding grid corrosive property analysis on anti-corrosion characteristics
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