Corrosion Electrochemical Behavior of the NiCoCrA1Y/ZrO2Coating in Natural Seawater
NiCoCrAlY/ZrO2 coatings were obtained by cold spraying. Nitrogen gas was used as processing gas (750 °C, 3.8 MPa). The corrosion electrochemical behavior of the coating on 907A steel in seawater was studied using open circuit potential monitoring, potentio-dynamic polarization and electrochemical impedance spectroscopy. Results showed that the as-deposited NiCoCrAlY/ZrO2 coatings, which were formed through significantly plastic deformed particles during impact, presented a dense microstructure and a high hardness. Results indicated that the formation of the stable and consecutive oxidation film, which has an outstanding anti-corrosion performance, was contributed to the compact structure of cold spray coatings. The pervasion of seawater was held back resulting from the cooperation of the oxidation film and the scale-like structure.
cold spraying NiCoCrAlY/Zr02 coating nitrogen gas corrosion oxidation film
Li Xiangbo Xing Lukuo Huang Guosheng Hu Xuelei
Science and Technology on Marine Corrosion and Protection Laboratory, Luoyang Ship Material Research Institute(LSMRI), Qingdao 266101,China
国际会议
西安
英文
250-252
2011-05-11（万方平台首次上网日期，不代表论文的发表时间）