Aluminum alloy plate is mainly used in superstructure such as hull structure and compartment in ship and marine engineering. At the same time, small-diameter aluminum alloy pipe is usually used as pipeline, while large-diameter pipe and bar are used as hull structure, mast component, beam column, etc. in order to lighten the hull, some thin-walled sections are sometimes used in hull structure. Aerospace aluminum products have good strength, processing performance and corrosion resistance, which can fully meet the needs of marine applications.