Aluminum bottle and preparation method thereof

A method of preparing an aluminum bottle comprising the following steps:

• under a condition that the aluminum bottle comprises an inner coating layer, an aluminum plate base layer, a surface passivation layer, an amino primer layer, a printing pigment layer, a surface paint protection layer, and a wear-resistant layer sequentially stacked, the aluminum plate base layer comprises the following elements by mass percentage:
• 0.1-0.2% of Si, 0.25-0.35% of Fe, 0-0.05% of Cu, 0.03-0.5% of Mn, 0-0.03% of Mg, 0-0.05% of Zn, 0-0.05% of Ti, 0-0.03% of Ni, 0-0.05% of Sr, 0-0.05% of Zr, 0-0.05% of B, and the balance of Al, the Al has a mass percentage ≥99.2%,
• performing batching according to the elements of the aluminum plate base layer, and then smelting to obtain molten aluminum;
• performing primary slagging, refinement, secondary slagging, refined degassing, and casting rolling sequentially on the molten aluminum to obtain an aluminum coil billet;
• performing primary hot casting rolling, cooling, cold rolling, and punching sequentially on the aluminum coil billet to obtain an aluminum block billet;
• performing annealing and first aging treatment sequentially on the aluminum block billet to obtain a first aging product;
• performing surface treatment and second aging treatment on the first aging product to obtain an aluminum material;
• stamping and forming the aluminum material to obtain a bowl-shaped aluminum block;
• performing arrangement, extrusion, and surface treatment sequentially on the bowl-shaped aluminum block to obtain a can body forming the surface passivation layer;
• spraying on an inner surface of the can body forming the surface passivation layer to form the inner coating layer;
• forming the amino primer layer, the printing pigment layer, the surface paint protection layer, and the wear-resistant layer sequentially on an outer surface of the can body forming the surface passivation layer to obtain a treated can body;
• and
• necking the treated can body to obtain the aluminum bottle, wherein the surface passivation layer is prepared by cleaning with a cleaning solution, and the cleaning solution comprises sodium salt, potassium salt, zirconium salt, and a surfactant.