NiCoCrAlY/ZrO2 coatings were obtained by cold spraying.Nitrogen gas was used as processing gas(750℃,3.8 MPa).The corrosion electrochemical behavior of the coating on 907A steel in seawater was studied using open circ...NiCoCrAlY/ZrO2 coatings were obtained by cold spraying.Nitrogen gas was used as processing gas(750℃,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.展开更多
文摘NiCoCrAlY/ZrO2 coatings were obtained by cold spraying.Nitrogen gas was used as processing gas(750℃,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.
