High corrosion resistance film on rebar by cerium modification
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2021年第5期
论文作者：Hongze An Zhengyi Xu Guozhe Meng Weihua Li Yanqiu Wang Bin Liu Junyi Wang Fuhui Wang
摘 要：A cerium film was prepared on the surface of rebar by chemical conversion method to enhance its corrosion resistance. The film in the simulated concrete pore solution was measured by electrochemical method, transmission electron microscope（TEM） and X-ray photoelectron spectroscopy（XPS）. The effect of temperature on film formation was studied, and the optimum temperature was determined at 35℃.The film produced by too high formation temperature has more defects, resulting in the lower corrosion resistance. The Ce film resistance increased with time evolution until 800 h, then decreased and stabilized. The Ce film layer has a double-layer film structure, the upper layer is an oxide of cerium, and the underlayer is an oxide of iron. Results revealed that after being immersed in the simulated concrete pore solution, the corrosion resistance of the Ce film was enhanced by self-densification.
Hongze An1，Zhengyi Xu1，Guozhe Meng1,2，Weihua Li2，Yanqiu Wang1，Bin Liu1，Junyi Wang1，Fuhui Wang1,3
1. Corrosion and Protection Laboratory, Key Laboratory of Superlight Materials and Surface Technology (Harbin Engineering University), Ministry of Education2. Southern Marine Science and Engineering Guangdong Laboratory, Sun Yat-sen University3. Corrosion and Protection Division, Shenyang National Laboratory for Material Science, Northeastern University
摘 要：A cerium film was prepared on the surface of rebar by chemical conversion method to enhance its corrosion resistance. The film in the simulated concrete pore solution was measured by electrochemical method, transmission electron microscope（TEM） and X-ray photoelectron spectroscopy（XPS）. The effect of temperature on film formation was studied, and the optimum temperature was determined at 35℃.The film produced by too high formation temperature has more defects, resulting in the lower corrosion resistance. The Ce film resistance increased with time evolution until 800 h, then decreased and stabilized. The Ce film layer has a double-layer film structure, the upper layer is an oxide of cerium, and the underlayer is an oxide of iron. Results revealed that after being immersed in the simulated concrete pore solution, the corrosion resistance of the Ce film was enhanced by self-densification.
关键词：
