文献类型：期刊文献

英文题名：Investigation on the corrosion inhibition of two newly-synthesized thioureas to mild steel in 1 mol/L HCl solution

作者：Yan, Ying[1];Dai, Ling[1];Zhang, Lehua[1];Zhong, Shiliang[1];Zhou, Hao[2];Wu, Laiming[2];Cai, Lankun[1]

机构：[1]East China Univ Sci & Technol, Coll Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China;[2]Shanghai Museum, Shanghai 200050, Peoples R China

年份：2018

卷号：44

期号：5

起止页码：3437

外文期刊名：RESEARCH ON CHEMICAL INTERMEDIATES

收录：;EI(收录号：20181504996239);WOS:【SCI-EXPANDED(收录号:WOS:000429485300032)】；

基金：The work carried out was supported by the National Nature Science Foundation of China (51671117) and Shanghai City Committee of science and technology research program key support project (13231203000).

语种：英文

外文关键词：Mild steel; Corrosion inhibitor; Electrochemical measurement; Weight loss; Theoretical study

摘要：Two kinds of thioureas, 1-N-(1'-(1',2',4'-triazole))acetyl-4-N-benzoylthiosemicarbazide (TBU) and 1-N-(1'-(1',2',4'-triazole))Methyl-4-N-(3aEuro(3),5aEuro(3)-dimethyl)benzoylthiosemicarbazide (TDBU) were synthesized and characterized as corrosion inhibitors in 1 mol/L hydrochloric acid to mild steel by weight loss measurement, electrochemical measurement, quantum chemistry calculation and molecular dynamics simulation. The results demonstrate that TBU and TDBU are good inhibitors that could reduce anodic dissolution and retard the hydrogen evolution reaction with the order TBU > TDBU, and that the corrosion inhibition efficiency increases with the increasing thiourea concentration. TBU has a remarkably high inhibition efficiency of 97.5% at a concentration of 1.0 x 10(-3) mol/L. The adsorptions of TBU and TDBU on mild steel accord with the Langmuir model. The results of quantum chemical study indicate that the S atom contributes to the adsorption of the corrosion thiourea molecules. The steric hindrance of the methyl group, not an electronic effect, was suggested as the main influencing factor on the inhibition efficiency of the two thioureas, which is relatively rare in literature reports.