摘要
用弱极化曲线技术和交流阻抗法研究了土壤中Cl-,SO42-,CO32-,NO3-对碳钢腐蚀的影响。结果表明:阴离子对碳钢腐蚀的影响比较显著。当土壤中分别添加Cl-,CO32-,NO3-时,随着阴离子质量浓度的增加,碳钢的腐蚀速率增大,在某一离子质量浓度时,腐蚀速率达到最大,然后腐蚀速率随着离子质量浓度的增加而减小。在有SO42-的土壤中随着SO42-质量浓度的增大,土壤中碳钢的腐蚀速率增大。在四种阴离子土壤中,阻抗谱均为单容抗弧,且大多在低频区出现扩散弧。
The impact of Cl^- , SO4^2- , CO3^2- , NO3^ - on soil corrosion behavior on carbon steel was studied by using low-polarization curve technique, and electrochemical impedance spectroscopy （EIS）. When the added ion was one of Cl^- , CO3^2- and NO3^ - , the corrosion rate of carbon steel increases with increasing salt content and reaches the peak at one salt content and then decreases with the increasing of salt content. The corrosion rate of carbon steel increases along with increasing SO4^2- . There is only one impedance curve and have a Werburg curve at low frequencies.
出处
《石油化工腐蚀与防护》
CAS
2006年第5期12-15,共4页
Corrosion & Protection In Petrochemical Industry
关键词
碳钢
土壤腐蚀
阴离子
carbon steel, soil corrosion, anions
