水和氯离子含量对碳钢接地网在酸性土壤中腐蚀行为的影响  

Influence of moisture and chloride on acidic soil corrosion of carbon steel grounding grid

作　　者：杨道武[1] 王钢[1] 陈坤汉[1] 梅其政[1] 王溯[1] 韩慧慧[1] 刘宇峰 

机构地区：[1]长沙理工大学化学与生物工程学院,湖南长沙410004 [2]湖南华电长沙发电有限公司,湖南长沙410203

出　　处：《长沙理工大学学报（自然科学版）》2010年第1期83-86,共4页Journal of Changsha University of Science and Technology:Natural Science

基　　金：湖南省自然科学基金资助项目(05JJ30198);湖南省科技攻关资助项目(2008GK3063J);长沙理工大学基金资助项目(040018)

摘　　要：以某变电站的土壤作为研究对象,通过电化学测试,研究了含水量和氯离子含量对碳钢接地网在该土壤中的腐蚀行为的影响.研究结果表明,随着含水量的增加,碳钢接地网的腐蚀速率先增大后减小.当含水量在20%-30%时,腐蚀速率达到最大;当土壤中氯离子含量在0.2%-0.5%之间时,碳钢接地网的腐蚀速率达到最大;经过28 d后,在氯离子含量为0.5%的土壤中,其腐蚀电流密度高达167.4μA/cm^2.This paper presents study about the influence of the moisture content and chloride concentration on corrosion behavior and corrosion rate of carbon steel,used in grounding grid in the acidic soil of a substation,measured by polarization curve.Electrochemical analyses show that corrosion rate of specimens increases initially and then reduces with the increasing of moisture content.The corrosion rate reaches to the top when moisture content is 20%～30% in the soil.The effect of chloride concentration on corrosion is evaluated by corrosion current density.The largest corrosion rate of specimens is found in the soil with chloride concentration of 0.2%～0.5%.The corrosion current density reaches 167.4 μA/cm2 after 28 d of exposure to the soil with a chloride concentration of 0.5%.

关 键 词：碳钢接地网 含水量 氯离子含量 极化曲线 腐蚀电流密度 

分 类 号：O646.6[理学—物理化学]