Amino acids have emerged as promising green alternatives to replace toxic inhibitors in corrosion protection applications.In this study,we present a one-step synthetic approach to get 4-(tert-butyl)benzoyl)methionine(...Amino acids have emerged as promising green alternatives to replace toxic inhibitors in corrosion protection applications.In this study,we present a one-step synthetic approach to get 4-(tert-butyl)benzoyl)methionine(P-Meth)and 4-(tert-butyl)benzoyl)cysteine(P-Cys)through the acylation reactions between methionine or cysteine and p-tert-butylbenzoic acid,respectively,which exhibit a super protective performance toward metals against corrosion.The corrosion rates of Q235 steel in 1 M HCl were reduced from 4.542 to 0.202and 0.312 mg·h^(-1)·cm^(-2)in the presence of 100 mg·L^(-1)P-Meth and P-Cys,respectively.The surface structures of Q235 steel remained unbroken after 12 h in 1 M HCl medium.The charge transfer resistances of corrosion reactions were enhanced by 12 and 9 times in the presence of P-Meth and P-Cys,respectively.P-Meth and P-Cys were adsorbed onto the Q235 steel via chemical actions,which were accompanied by minimal physical action.Molecular dynamic simulations demonstrate the higher binding energy of P-Meth onto Q235 steel than P-Cys.The study contributes to the corrosion protection of metals with green and environmentally friendly methods.展开更多
基金supported by the Shenzhen Science and Technology Research Fund(Nos.JSGG20201103153807021,GXWD20220811173736002,and KCXFZ20230731094904009)We are also grateful to the Natural Science Foundation of Guangdong Province,China(No.2021 A1515110366)+1 种基金the National Natural Science Foundation of China(Nos.22302048,82204231,and 22004024)the Shenzhen High Tech Zone Development Special Plan Innovation Platform Construction Project,China(No.29853MKCJ-2023-002-11)。
文摘Amino acids have emerged as promising green alternatives to replace toxic inhibitors in corrosion protection applications.In this study,we present a one-step synthetic approach to get 4-(tert-butyl)benzoyl)methionine(P-Meth)and 4-(tert-butyl)benzoyl)cysteine(P-Cys)through the acylation reactions between methionine or cysteine and p-tert-butylbenzoic acid,respectively,which exhibit a super protective performance toward metals against corrosion.The corrosion rates of Q235 steel in 1 M HCl were reduced from 4.542 to 0.202and 0.312 mg·h^(-1)·cm^(-2)in the presence of 100 mg·L^(-1)P-Meth and P-Cys,respectively.The surface structures of Q235 steel remained unbroken after 12 h in 1 M HCl medium.The charge transfer resistances of corrosion reactions were enhanced by 12 and 9 times in the presence of P-Meth and P-Cys,respectively.P-Meth and P-Cys were adsorbed onto the Q235 steel via chemical actions,which were accompanied by minimal physical action.Molecular dynamic simulations demonstrate the higher binding energy of P-Meth onto Q235 steel than P-Cys.The study contributes to the corrosion protection of metals with green and environmentally friendly methods.
