Preparation and research of metal-base cold spray coatings with seawater corrosion resistant

Abstract

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.