溴化十六烷基吡啶在硫酸溶液中对钢的缓蚀性能研究  

Study on the Inhibition Action of Hexadecylpyridinium Bromide on Steel in Sulfuric Acid Solution

作　　者：徐昕 李向红 XU Xin;LI Xianghong(College of Chemical Engineering,Southwest Forestry University,Kunming 650224,China)

机构地区：[1]西南林业大学化学工程学院,云南昆明650224

出　　处：《电镀与精饰》2021年第10期1-7,共7页Plating & Finishing

基　　金：国家自然科学基金项目(51761036);云南省中青年学术和技术带头人培养项目(2015HB049);云南省万人计划“青年拔尖人才”专项(51900109)。

摘　　要：采用失重法、动电位极化曲线、电化学阻抗谱(EIS)、扫描电子显微镜(SEM)及原子力显微镜(AFM)研究了阳离子表面活性剂溴化十六烷基吡啶(HDPB)在1.0 mol/LH2SO4溶液中对冷轧钢的缓蚀性能。结果表明:HDPB具有良好的缓蚀性能,缓蚀率随缓蚀剂浓度和温度的增加而增大,50℃时100 mg/LHDPB的最大缓蚀率可高达98.2%。HDPB属于混合抑制型缓蚀剂,添加HDPB后电荷转移电阻显著增大,且SEM与AFM的微观形貌进一步证实了HDPB有效减缓了冷轧钢表面的腐蚀程度。The inhibition action of the cationic surfactant hexadecylpyridinium bromide(HDPB)on cold rolled steel in 1.0 mol/L H2SO4 solution was studied by weight loss method,potentiodynamic polarization curves,electrochemical impedance spectroscopy(EIS),scanning electron microscope(SEM)and atomic force microscope(AFM).The experimental results showed that the HDPB was a good inhibitor,and inhibition efficiency increased with the inhibitor concentration and temperature in general.At 50℃,the maximum inhibition efficiency of 100 mg/L HDPB obtained from weight loss method was as high as 98.2%.HDPB was a mixed inhibitor.The charge transfer resistance was in‐creased to more extent with the addition of HDPB.SEM and AFM micro-morphologies of steel surfaces confirmed that the corrosion degree of steel surface was efficiently retarded by HDPB.

关 键 词：溴代十六烷基吡啶 缓蚀 硫酸 冷轧钢 吸附 

分 类 号：TG174.42[金属学及工艺—金属表面处理]