文献类型：期刊文献

英文题名：Experimental and theoretical investigation of indole as a corrosion inhibitor for mild steel in sulfuric acid solution

作者：Lv, T. M.[1];Zhu, S. H.[2];Guo, L.[1];Zhang, S. T.[1]

第一作者：Lv, T. M.

通讯作者：Zhang, ST[1]

机构：[1]Chongqing Univ, Sch Chem & Chem Engn, Chongqing 400044, Peoples R China;[2]Xinxiang Univ, Sch Comp & Informat Engn, Xinxiang 453003, Peoples R China

第一机构：Chongqing Univ, Sch Chem & Chem Engn, Chongqing 400044, Peoples R China

通讯机构：[1]corresponding author), Chongqing Univ, Sch Chem & Chem Engn, Chongqing 400044, Peoples R China.

年份：2015

卷号：41

期号：10

起止页码：7073-7093

外文期刊名：RESEARCH ON CHEMICAL INTERMEDIATES

收录：;EI(收录号：20144500177676);Scopus(收录号：2-s2.0-84941995116);WOS:【SCI-EXPANDED(收录号:WOS:000361481800013)】；

基金：This research was sponsored by the National Natural Science Foundation of China (21376282). We would like to thank the anonymous referees for valuable criticisms and useful suggestions that helped us to improve the quality of our present and future work.

语种：英文

外文关键词：Electrochemical test; Weight loss test; Acid corrosion; Indole; Mild steel; Theoretical calculations

摘要：The inhibiting effect of indole on the corrosion of mild steel Q235 in 0.1 M H2SO4 was investigated through different approaches including weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), scanning electron microscope experiments, and theoretical calculations. Polarization curves reveal that the indole acts as a mixed-type inhibitor and the reaction mechanism in respect of either hydrogen evolution or mild steel dissolution has not been modified. EIS results imply that the water molecules adsorbed on the steel surface are substituted by the indole molecules and the inhibiting behavior of indole is probably due to the formation of an adsorptive film on the steel surface. Thus the thermodynamic and kinetic parameters are determined and discussed to give better understanding of the adsorption process. Theoretical calculations are also discussed in light of the optimized molecular structure of indole to gain further insight of the inhibition mechanism.