Effect of Microstructures on Corrosion Behavior of Nickel Coatings:(Ⅰ) Abnormal Grain Size Effect on Corrosion Behavior
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2015年第12期
论文作者：Guozhe Meng Yang Li Yawei Shao Tao Zhang Yanqiu Wang Fuhui Wang Xuequn Cheng Chaofang Dong Xiaogang Li
文章页码：1186 - 1192
摘 要：Nickel coatings with different microstructures were synthesized by pulse jet electrodeposition technique.Their morphology and microstructure were investigated by scanning electron microscopy（SEM）and transmission electron microscopy（TEM）.The corrosion property of the coatings was studied by using polarization,electrochemical impedance spectroscopy（EIS）,potential of zero free charge（PZFC） measurements and Mott-Schottky（M-S） relationship.The results showed that the coating with grain size of 50 nm possessed higher corrosion resistance than that with grain size of 10 nm.This abnormal behavior may be related to the existence of nanoscale twins in the coatings and the lower concentration of acceptor in the passive films.
Guozhe Meng1,2，Yang Li1，Yawei Shao1,2，Tao Zhang1,2，Yanqiu Wang1，Fuhui Wang1,2，Xuequn Cheng3，Chaofang Dong3，Xiaogang Li2,3
1. Corrosion and Protection Laboratory,Key Laboratory of Superlight Materials and Surface Technology (Harbin Engineering University),Ministry of Education2. Laboratory for Corrosion and Protection,Institute of Metal Research,Chinese Academy of Sciences3. Corrosion and Protection Center,University of Science and Technology Beijing
摘 要：Nickel coatings with different microstructures were synthesized by pulse jet electrodeposition technique.Their morphology and microstructure were investigated by scanning electron microscopy（SEM）and transmission electron microscopy（TEM）.The corrosion property of the coatings was studied by using polarization,electrochemical impedance spectroscopy（EIS）,potential of zero free charge（PZFC） measurements and Mott-Schottky（M-S） relationship.The results showed that the coating with grain size of 50 nm possessed higher corrosion resistance than that with grain size of 10 nm.This abnormal behavior may be related to the existence of nanoscale twins in the coatings and the lower concentration of acceptor in the passive films.
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