（Beijing key Laboratory of Materials Electrochemical Process and Technology, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China）
The rapid development of marine and ship engineering technology has put forward higher and higher requirements for the anti-corrosion performance of materials. Copper-nickel alloys are a type of copper alloy mainly modified by nickel element. Due to its silver-white metallic luster, it is also called white copper. Copper-nickel alloys have been widely used in marine and ship engineering, petrochemical industry and other fields, owing to excellent corrosion resistance, good processability and weldability, especially in terms of resistance to seawater erosion. In this paper, according to the research status of marine corrosion of copper-nickel alloys at home and abroad, the corrosion behavior, influencing factors and corrosion mechanism of copper-nickel alloys under seawater erosion condition were reviewed and analyzed from the view point of material and environmental factors respectively. On this basis, the existing problems in this research field were analyzed, four problems were highlighted, including less research and development of more harsh environment resistant alloy materials, no unified understanding of corrosion resistance mechanism, research methods to be expanded, lack of research on corrosion behavior of components, and corresponding suggestions and solutions were proposed. Finally, the future development direction was prospected.