5052 marine aluminium plate is Al-Mg alloy, cold workability, good molding processability, corrosion resistance, 5052 alloy is the most widely used of a rust-proof aluminum, the strength of this alloy is high, especially with anti-fatigue strength , Plasticity and high corrosion resistance, hardening in the semi-cold when the plastic is still good, 5052 aluminum alloy plate used to do no pressure inside the beverage cap, the state is H19, the material first do oxidation, to improve paint adhesion and corrosion resistance, both sides After painting in the lid forming process, I produced the 5052 alloy lid material surface quality, performance and stability.