Abstract:The cold gas dynamic spray was used to prepare the Al 2 O 3 -Cu alloys coating on Al, Cu and steel substrate in this study with the mixture of pure Al 2 O 3 powder and pure copper powder. The influence rule of coating performance for different ratios was analyzed. The results showed that at a relatively high substrate hardness, different ratios is less effective to bond strength and vice versa.
Four composite coatings of aluminum, zinc, aluminum zinc and high aluminum bronze were prepared by low-pressure cold spraying technology on 45 steel substrate. Study on microstructure and corrosion resistance of coating by scanning electron microscopy, electrochemical workstation and static immersion. The results showed that compared with the other three coatings. The high aluminum bronze coating was the lowest porosity(0.41%), the highest self-corrosion potential (-1.38v), and the lowest corrosion rate (0.044mm/a), The coating shows good corrosion resistance and can provide long-term and effective protection for the substrate.
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