Influence of Nano-Al Concentrates on the Corrosion Resistance of Epoxy Coatings  

作　　者：Yongchun Liang Fu-Chun Liu Ming Nie Shuyan Zhao Jiedong Lin En-Hou Han 

机构地区：[1]The Electric Power Research Institute of Guangdong Power Grid Corporation [2]State Key Laboratory for Corrosion and Protection,Institute of Metal Research,Chinese Academy of Sciences

出　　处：《Journal of Materials Science & Technology》2013年第4期353-358,共6页材料科学技术（英文版）

基　　金：the National Key Technology R&D Program (Grant No.2012BAB15B00) for supporting these studies

摘　　要：A two-stage process was used to produce nano-composite epoxy coatings. The first step involved preparing nano-AI concentrates with high concentration and low viscosity, and the second step produced nano- composite epoxy coatings by mixing the nano-AI concentrates and epoxy resin. Later, the coating was examined with immersion and salt spray tests. The coatings were characterized by electrochemical impedance spectroscopy （EIS）, scanning electron microscopy （SEM） and X-ray photoelectron spectroscopy （XPS）. The results showed that the 5% nano-AI significantly improves the corrosion resistance of the coatings. There are two effects of nano-AI on the coating. Nano-AI is corroded initially to protect the substrate from corrosion, and then the aluminum oxide and aluminum hydroxide were produced after corrosion of nano-AI, which hindered the transmission of corrosion fluid into the coatings.A two-stage process was used to produce nano-composite epoxy coatings. The first step involved preparing nano-AI concentrates with high concentration and low viscosity, and the second step produced nano- composite epoxy coatings by mixing the nano-AI concentrates and epoxy resin. Later, the coating was examined with immersion and salt spray tests. The coatings were characterized by electrochemical impedance spectroscopy （EIS）, scanning electron microscopy （SEM） and X-ray photoelectron spectroscopy （XPS）. The results showed that the 5% nano-AI significantly improves the corrosion resistance of the coatings. There are two effects of nano-AI on the coating. Nano-AI is corroded initially to protect the substrate from corrosion, and then the aluminum oxide and aluminum hydroxide were produced after corrosion of nano-AI, which hindered the transmission of corrosion fluid into the coatings.

关 键 词：Nanometer metal Organic coatings Salt spray test Electrochemical impedance spectroscopy 

分 类 号：TG174.44[金属学及工艺—金属表面处理]