Aluminum bottle:Due to the softness of aluminum, collisions during handling may cause damage. This also makes aluminum cylinders of the same volume thicker and heavier (on land) than steel cylinders.
Although aluminum bottles will also be corroded, aluminum oxide will adhere to the corroded surface and form a protective film to prevent further corrosion.
The buoyancy under water is greater than that of steel cylinders, and it is lighter and easier to operate in water (commonly used as decompression cylinders for technical diving).
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