生态友好型缓蚀剂荠菜提取液在1mol·L^(-1)盐酸介质中对Q235碳钢的缓蚀行为研究（英文）

作     者：胡琴 邱于兵 张国安 郭兴蓬 

作者机构：School of Chemistry and Chemical EngineeringHuazhong University of Science and Technology Hubei Key Laboratory of Materials Chemistry and Service Failure 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2015年第23卷第8期

页      面：1408-1415页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Supported by the National Natural Science Foundation of China(51101066) 

主　　题：植物提取物 环境友好型 腐蚀反应 Q235碳钢 mol 抑制剂 环境扫描电子显微镜 荠菜 

摘      要：The corrosion inhibition effect of Capsella bursa-pastoris extracts(CBE) for Q235 carbon steels in 1 mol·L-1hydrochloric acid solution was studied using electrochemical methods, environmental scanning electron microscopy(SEM) and Raman microscopy analysis. The polarization plots indicate that CBE serves as an effective, mixedtype inhibitor. Linear polarization resistance shows that increasing CBE concentration and temperature results in increased inhibition ef ficiency. The highest inhibition ef ficiency can reach 97% when adding 60 mg·L-1CBE,which is better than some reported plant extracts under the similar environment. The adsorption of CBE molecules is found to obey the Langmuir adsorption isotherm. Some thermodynamic and kinetic parameters for the adsorption process, such as the adsorption equilibrium constant(K), free energy of adsorption(ΔG ads), activation energy of corrosion reaction(E a) and the heat of adsorption(Q ads), are calculated and discussed. SEM and Raman microscopy analysis also demonstrate the formation of a CBE inhibition film on the metal surface.