湿度对Q235钢在污染土壤中腐蚀行为的影响  

Influence of Soil Humidity on Corrosion Behavior of Q235 Steel in Polluted Soils

作　　者：伍远辉[1] 刘天模[1] 罗宿星[2] 孙成[3] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400045 [2]遵义师范学院化学系,遵义563002 [3]中国科学院金属研究所金属腐蚀与防护国家重点实验室,沈阳110016

出　　处：《腐蚀与防护》2008年第4期178-181,共4页Corrosion & Protection

基　　金：贵州省教育厅自然科学研究重点资助项目(黔教科2005118)

摘　　要：利用极化曲线技术、电化学阻抗测试技术、扫描电镜和表面能谱等方法,研究了Q235钢在不同湿度的污染土壤中的腐蚀行为。试验结果表明,湿度对Q235钢腐蚀的影响显著。随土壤湿度的增加,Q235钢在污染土壤中的腐蚀速率也增加,当含水量增大到20%时,腐蚀速率达到最大,然后腐蚀速率随着湿度增加而减小。Q235钢在湿度为20%的污染土壤中腐蚀后表面出现明显的裂痕和腐蚀坑。The corrosion behaviors of Q235 steel in polluted soils with different humidity were studied by using polarization curve technique,electrochemical impedance spectroscopy(EIS),scanning electron microscopy(SEM) and EDAX.It was found that the polluted soil humidity obviously affected the corrosion behavior of Q235 steel.The corrosion rate of Q235 steel increased with the increasing of soil humidity and reached a maximum at 20% water content,then decreased with the increasing of soil humidity.There were obvious...

关 键 词：Q235钢 湿度 污染土壤 土壤腐蚀 

分 类 号：TG172.4[金属学及工艺—金属表面处理]