交流电对X80钢在酸性土壤环境中腐蚀行为的影响  

Effects of Alternating Current on Corrosion Behavior of X80 Pipeline Steel in Acid Soil Environment

作　　者：朱敏[1] 刘智勇[1] 杜翠薇[1] 李晓刚[1] 王丽叶[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083

出　　处：《材料工程》2015年第2期85-90,共6页Journal of Materials Engineering

基　　金：国家自然科学基金(51371036);国家高技术研究发展计划项目(2012AA040105)

摘　　要：通过电化学测试、浸泡实验和表面分析技术研究了交流电流密度（0～1000A/m^2）对X80钢在鹰潭酸性土壤模拟溶液中腐蚀行为的影响。结果表明：随交流电流密度的增加,X80钢的腐蚀速率逐渐增加。当交流电流密度小于100A/m^-2时,其腐蚀速率缓慢增大,X80钢腐蚀电位随交流电流密度增加而快速负移;当交流电流密度大于100A/m^2时,其腐蚀速率快速增加,其腐蚀电位接近。随交流电流密度的增大,X80钢的腐蚀形态由均匀腐蚀演变为点蚀,阴极极化曲线上的电流波动愈明显,阳极电流密度增大。交流电作用下X80钢生成的腐蚀产物疏松,裂纹多,对基体的保护性很差。The effects of alternating current（AC）current density（0-1000A/m^2）on the corrosion behavior of X80 steel in Yingtan acid soil simulated solution was studied by electrochemical test,immersion test and surface characterization technique.The results show that with the increase of AC current density,the corrosion rates of X80 steel increase.The corrosion rates increase slightly and the corrosion potentials of X80 steel rapidly shift negatively,with an increasing AC current density less than100A/m^2.When the AC current density is greater than 100A/m^2,the corrosion rates increase rapidly and the corrosion potentials of X80 steel are roughly equal.With the increase in AC current density,the corrosion forms evolve from uniform corrosion to pitting corrosion.Moreover,the current fluctuation on the cathodic polarization curves becomes more obvious and the anode current densities increase.The corrosion product of X80 steel under AC application can not protect the substrate,because of its loose and multi-cracked characteristics.

关 键 词：X80钢 交流电流密度 腐蚀行为 酸性土壤 

分 类 号：TG171[金属学及工艺—金属表面处理]