At present, aluminum alloys are more and more widely used in the shipbuilding industry. Small self-sampans, motorboats, large ships up to 10,000 tons, from civilian to military, from high-speed hovercraft to deep-water submarines, from fishing boats to marine mining vessels, are adopting structures. 5083 marine aluminium alloy plate with good performance are used as ship hulls, superstructures, various facilities, pipelines and appliances. Today we will introduce which aluminum alloy is suitable for the side and bottom of the ship.
The working environment of ships requires structural materials to have certain mechanical strength, fatigue strength, elongation and impact resistance. However, it is usually difficult for high-strength aluminum alloys to have excellent corrosion resistance and weldability at the same time. Therefore, aluminum alloys for ships generally use medium-strength corrosion-resistant weldable aluminum alloys.



The ship’s side and bottom shells require high corrosion resistance. Generally, 5083 marine aluminium alloy plate 5083H321 high-magnesium alloy is often used for production, and then special processing is carried out to make the surface of the passivation film net and the self-repairing ability after cracking. Chloride ions in the metal are particularly violent to the passive film, causing the aluminum alloy to be unstable in the passive state in seawater, and it is prone to local corrosion such as pitting and crevice corrosion.