海洋工程用铜镍合金的腐蚀与防护研究进展

Cu-Ni alloys are widely used in marine engineering fields such as marine water condensation systems, and heat exchangers of coastal power plants due to they have good corrosion resistance to seawater, high heat transfer coefficient, excellent anti-microbial adhesion performance and cold and hot processing performance. In this paper, the corrosion behavior of copper-nickel alloys used in marine engineering is reviewed. Firstly, the microstructure characteristics of copper-nickel alloys in as-cast, deformed and heat treated are summarized, and then the effects of alloying elements, temperature, pH and sulfur ions on the corrosion resistance of copper-nickel alloys are summarized and analyzed. The methods of improving the corrosion resistance of copper-nickel alloys such as alloying, sacrificial anode, corrosion inhibitor, anticorrosive coating and film technology are reviewed. Finally, the development trend of copper-nickel alloys for marine engineering is prospected.