Degradation Mechanism of Lacquered Tinplate in Energy Drink by in-situ EIS and EN  

作　　者：周超 WANG Jihui SONG Shizhe 夏大海 WANG Ke SHEN Chen LUO Bing SHI Jiangbo 

机构地区：[1]School of Materials Science and Engineering, Tianjin University [2]Department of Chemical and Materials Engineering, University of Alberta [3]94277 Unit of the PLA

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2013年第2期367-372,共6页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Key Basic Research Program of China(2011CB610505);the Specialized Research Fund for the Doctoral Program of Higher Education(20120032110029)

摘　　要：The corrosion process of phenolic epoxy coated tinplate in energy drink was investigated by in-situ electrochemical impedance spectroscopy（EIS） and electrochemical noise（EN） techniques. The experimental results indicate that the degradation process of novolac epoxy coated tinplate in energy drink can be divided into three main stages： organic coating wetted by the beverage; corrosion initiation beneath the organic coating; and corrosion extension process. It was proposed that the tin coating and carbon steel were mainly corroded by organic acids in energy drink through the pores of the organic coating. After the tin coating was corroded, the carbon steel started to corrode due to its higher electrochemical activity and became to be the dominated corrosion reaction.The corrosion process of phenolic epoxy coated tinplate in energy drink was investigated by in-situ electrochemical impedance spectroscopy（EIS） and electrochemical noise（EN） techniques. The experimental results indicate that the degradation process of novolac epoxy coated tinplate in energy drink can be divided into three main stages： organic coating wetted by the beverage; corrosion initiation beneath the organic coating; and corrosion extension process. It was proposed that the tin coating and carbon steel were mainly corroded by organic acids in energy drink through the pores of the organic coating. After the tin coating was corroded, the carbon steel started to corrode due to its higher electrochemical activity and became to be the dominated corrosion reaction.

关 键 词：TINPLATE energy drink electrochemical impedance spectroscopy electrochemical noise corrosion mechanism 

分 类 号：TG174.44[金属学及工艺—金属表面处理]