文献类型：期刊文献

英文题名：'Pungent' Copper Surface Resists Acid Corrosion in Strong HCL Solutions

作者：Cai, Liang[1,2];Fu, Qing[3];Shi, Rongwei[4];Tang, Yun[4];Long, Yi-Tao[1,2];He, Xiao-Peng[1,2];Jin, Yu;Liu, Guixia[4];Chen, Guo-Rong[1,2];Ghen, Kaixian[1,2]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Sch Chem & Mol Engn, Inst Fine Chem, Shanghai 200237, Peoples R China;[3]E China Univ Sci & Technol, Engn Res Ctr Pharmaceut Proc Chem, Minist Educ, Shanghai 200237, Peoples R China;[4]E China Univ Sci & Technol, Sch Pharm, Shanghai Key Lab New Drug Design, Shanghai 200237, Peoples R China

年份：2014

卷号：53

期号：1

起止页码：64

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20140317214663);WOS:【SCI-EXPANDED(收录号:WOS:000329586100008)】；

基金：We thank the National Natural Science Foundation of China (21176076, 21202045, and 81273438), the Key Project of Shanghai Science and Technology Commission (13NM1400900), the Innovation Program of Shanghai Municipal Education Commission (13ZZ044) and the Shanghai Committee of Science and Technology (11DZ2260600).

语种：英文

外文关键词：Amino acids - Corrosion inhibitors - Corrosion protection - Plant extracts - Efficiency - Copper corrosion - Density functional theory - Medicine - Corrosion rate - Physisorption

摘要：Extensive efforts have been devoted to the qualification of plant extracts as green corrosion inhibitors for industrial metals, but studies that demonstrate the active component(s) of these extracts remain scarce. We report here that piperine, the major pungent component of peppers, has the best corrosion inhibitive efficiency for copper in HCl among four analogous amide alkaloids isolated from a traditional Chinese medicine. This compound inhibited HCl corrosion more efficiently than cysteine, and did not exhibit markedly decreased efficiency under several harsh experimental conditions. Electrochemical and microscopic analyses suggested that piperine could form a protective layer on the metal surface via both physisorption and chemisorption, reducing the corrosion rate. The adsorption energies of all the test compounds were calculated using a hybrid density functional theory.