盐酸介质中APPB对A3钢的缓蚀作用
Inhibition Perfromance of APPB for A3 Steel in Hydrochloric Acid
摘 要
采用失重法、动电位极化法和电化学阻抗谱评价了1-(1-苯胺基-3-苯基-2-丙烯基)-2,3-二氢苯并咪唑(APPB)在盐酸介质中对A3钢的缓蚀作用.结果表明,APPB的缓蚀率随着盐酸浓度的升高和缓蚀剂浓度增大而升高,随着温度升高而下降.加入APPB后,提高了腐蚀反应的活化能.APPB能自发地吸附在A3钢表面,其吸附行为符合Langmuir吸附等温式.同时用量子化学方法研究了APPB分子结构与缓蚀性能的关系.
失重法
电化学测试
缓蚀
量子化学计算
benzimidazol derivative
weight loss method
electrochemical measurement
inhibition
quantum chemical calculation
Abstract
The inhibition perfromance of 1-(1-anilino-3-phenyl-2-propenyl)-2,3-dihydro-benzimi-dazol (APPB) on A3 steel in HCl solution was investigated by weight-loss test,potentiodynamic polarization and electrochemical impedance spectroscopy.The results showed that the inhibition efficiency increased with increasing the concentration of APPB and concentration of hydrochloric acid,and decreased with increasing temperature.Active energy of corrosion reaction with APPB was larger than that without APPB.APPB was adsorbed on A3 steel surface spontaneously,and the adsorption of APPB followed Langmuir isotherm.The relationship between the molecular structure of APPB and the inhibition efficiency was investigated by quantum chemical calculations.
中图分类号 TG174.42 DOI 10.11973/fsyfh-201507007
所属栏目 试验研究
基金项目 长江大学工程技术学院科研创新基金(13J0603)
收稿日期 2014/7/28
修改稿日期
网络出版日期
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联系人作者苏铁军(sutj@qq.com)
备注苏铁军(1975-),讲师,硕士,从事油田化学品方面的开发.
引用该论文: SU Tie-jun,LI Ke-hua,LUO Yun-bai,XI Wei. Inhibition Perfromance of APPB for A3 Steel in Hydrochloric Acid[J]. Corrosion & Protection, 2015, 36(7): 629
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