Abstract:Nickel aluminum bronze coating was deposited by cold spray technology on the nickel aluminum bronze 9442# substrate. Microstructure, electrochemical behavior and tribocorrosion behavior were observed and tested by SEM, OM, XRD, XPS, electrochemical working station and abrasion machine. The results showed that intergranular corrosion and optional corrosion took place in electrochemical corrosion process, microspore and cracks appeared on coating after electrochemical corrosion; tribocorrosion process consisted of competition between friction and passivation and promotion of anodic dissolution by friction; compared with static state, Ecorrof coating and substrate under tribocorrosion condition drastically decreased, Icorrof coating and substrate increased an order of magnitude, corrosion resistance of coating and substrate became worse; compared with dry friction, friction coefficient of coating and substrate increased drastically, wear resistance of coating and substrate became worse.