A green and effective corrosion inhibitor of functionalized carbon dots  

作　　者：Yuwei Ye Dongping Yang Hao Chen 

机构地区：[1]The Institute of Engineering Research,Jiangxi University of Science and Technology,Ganzhou,341000,China [2]Key Laboratory of Marine Materials and Related Technology,Zhejiang Key Laboratory of Marine Materials and Protective Technologies,Ningbo Institute of Materials Technology&Engineering,Chinese Academy of Sciences,Ningbo,315201,China

出　　处：《Journal of Materials Science & Technology》2019年第10期2243-2253,共11页材料科学技术（英文版）

基　　金：financially supported by the Program of Qingjiang Excellent Young Talents, Jiangxi University of Science and Technology;the Natural Science Foundation of Jiangxi Province (No. 20181BBE58001);the Natural Science Foundation of Jiangxi Education Department (No. GJJ180431)

摘　　要：In this work, a green and effective corrosion inhibitor of functionalized carbon dots(FCDs) was synthesized by the conjugation of imidazole and citric acid carbon dots(CA-CDs). The corrosion inhibition behavior of FCDs for Q235 steel in 1 M HCl solution was systematically investigated by electrochemical analysis, corrosion morphology and adsorption isotherm. The electrochemical results implied that the as-prepared FCDs inhibitor could effectively suppress the corrosion of Q235 steel in 1 M HCl solution. At the same time, the inhibition efficiency of steel in 1 M HCl solution was more than 90% when the inhibitor concentration exceeded 100 mg/L. This excellent property was attributed to the coverage of adsorption film on the steel surface, which conformed to the Langmuir adsorption model. In addition, the analysis of adsorption isotherm displayed that the adsorption mechanism was the physicochemical interaction at the steel/solution interface.In this work, a green and effective corrosion inhibitor of functionalized carbon dots(FCDs) was synthesized by the conjugation of imidazole and citric acid carbon dots(CA-CDs). The corrosion inhibition behavior of FCDs for Q235 steel in 1 M HCl solution was systematically investigated by electrochemical analysis, corrosion morphology and adsorption isotherm. The electrochemical results implied that the as-prepared FCDs inhibitor could effectively suppress the corrosion of Q235 steel in 1 M HCl solution. At the same time, the inhibition efficiency of steel in 1 M HCl solution was more than 90% when the inhibitor concentration exceeded 100 mg/L. This excellent property was attributed to the coverage of adsorption film on the steel surface, which conformed to the Langmuir adsorption model. In addition, the analysis of adsorption isotherm displayed that the adsorption mechanism was the physicochemical interaction at the steel/solution interface.

关 键 词：Q235 steel Carbon dots ADSORPTION HCl solution 

分 类 号：TG1[金属学及工艺—金属学]