Marine aluminium alloy sheet of high corrosion resistance

Marine aluminium alloy sheet of high corrosion resistance

Aluminium and its alloy elements are chemically active, and when they react with oxygen they form a stable oxide film on the surface, preventing them from reacting further with the surrounding environment. Marine aluminium alloy plate has good corrosion resistance, and aluminium alloy drill pipe does not corrode even after long-term immersion in saturated CO2 solution. After practical use, aluminium alloy drill pipe can effectively prevent H2S and CO2 corrosion at any temperature.

Aluminium alloys have been used in shipbuilding for nearly a hundred years. With the rapid development of the shipbuilding industry, the lightweighting of ships is being increasingly emphasized. Due to its low density, high strength and corrosion resistance, aluminium is well suited to the harsh conditions of marine use. The lower processing costs of aluminium make it more economical to build ships from aluminium. From a ship designer's point of view, ships made from marine aluminium alloy sheets are faster and have a longer service life under the same power conditions. As a result, aluminium alloys for ships have advanced rapidly in recent years and offer a wide market for a large number of aluminium materials.

The aluminium alloys for ships are mainly aluminium-magnesium, aluminium-magnesium-silicon and aluminium-zinc-magnesium alloys, which are divided into aluminium alloys for upper outfitting and aluminium alloys for hull structure according to the position used, where the perch includes mast, porthole, smoke tube, steering room, etc., and the hull structure includes bulkhead, rib, keel, bottom outer plate and ship side, etc.