X80管线钢在模拟土壤介质中的电化学行为  

Electrochemical Behavior of X80 Pipeline Steel in Simulated Edaphic Electrolyte

作　　者：龚敏[1,2] 张国虎[2] 曾祥梅[2] 张婷[2] 

机构地区：[1]四川理工学院材料腐蚀与防护四川省高校重点实验室,四川自贡643000 [2]四川理工学院材料与化学工程学院,四川自贡643000

出　　处：《热加工工艺》2011年第12期31-33,共3页Hot Working Technology

基　　金：四川省高校重点实验室开放基金项目(2009CL01)

摘　　要：利用电化学测试手段,研究了X80管线钢在模拟土壤介质中的电化学行为。结果表明:土壤含水量达到20%时,X80管线钢在土壤介质中的腐蚀速度最大;当土壤介质pH<7时,以H-还原为主,析氢电位明显比碱性条件下低;外加电流阴极保护和涂层联合应用时,腐蚀电流先增大再减小,最后趋于稳定。The electrochemical behavior of X80 pipeline steel in simulated edaphic electrolyte was researched by electrochemical test methods.The results show that the corrosion rate of X80 pipeline steel is the largest when the soil moisture content is 20%.When soil medium＇s pH is below 7,H-deoxidation is dominant reaction,and the potential of hydrogen evolution is obviously lower than that of alkaline conditions.When the impressed current cathodic protection is combined with coatings,the corrosion current increases first and then decreases before the final stable.

关 键 词：X80管线钢 析氢 阴极保护 涂层 

分 类 号：TG142.7[一般工业技术—材料科学与工程]