表面技术Issue(3)：90-94,110,6.
曼尼希碱与硫脲在气井采出水腐蚀体系中的缓蚀协同作用
Synergistic Inhibition Mechanism of Mannich Bases and Thiourea in Corrosion System of Gas-field Wastewater
摘要
Abstract
Objective To find new inhibitors of carbon steel corrosion in gas-field wastewater. Methods The synergistic inhibi-tion effect of mannich ( MABS) and thiourea ( TU) on N80 carbon steel in corrosion system of gas-field wastewater was investigated by using polarization curves and electrochemical impedance spectroscopy ( EIS) . Results The results showed that TU had strong in-hibition effect on the anodic and cathodic processes of N80 steel corrosion, while MABS acted as mixed-type inhibitor preferentially restraining the cathodic process of metal. The combination of MABS and TU showed excellent synergistic inhibition effect in gas-field wastewater. When the Mannich and thiourea concentration was 0. 75% and 2. 5 mg/L, respectively, the inhibition effect was the best. Conclusion When using the combination of MABS and TU, a bi-layer inhibitor film with the inner layer of TU molecules and the outer layer of mannich molecules was formed on the N80 steel surface.关键词
缓蚀剂/协同作用/曼尼希碱/硫脲Key words
corrosion inhibitor/synergistic effect/mannich base/thiourea分类
矿业与冶金引用本文复制引用
孟凡宁,李谦定,李善建..曼尼希碱与硫脲在气井采出水腐蚀体系中的缓蚀协同作用[J].表面技术,2014,(3):90-94,110,6.基金项目
西安石油大学全日制硕士研究生创新基金资助(2013cx120734)Fund：Supported by the Xi′an Shiyou University Full-time Graduate Innovation Fund (2013cx120734) （2013cx120734）
