1, rusty: aluminum will not rust, the main alloying elements copper, zinc, manganese, Silicon, magnesium, secondary alloying elements such as nickel, iron, aluminum alloy iron content is very small. Stainless steel, mainly by the chromium-rich oxide film formed on the surface (membrane) access to corrosion, if such films are special damage, corrosion of metal surfaces will be, of course, the layer of protective film is very thin and strong, dense, stable, generally used is not damaged!
2, more or less alkaline bath cleaning supplies have, over time, plus deposits or cleaning less, how much of the material will be corrosion, but stainless steel is not going to have this problem, and aluminum on the surface corrosion can occur.
Salts of 3, if the environment is high, like live Beach environments of stainless steel in the presence of chloride ion corrosion quickly, which suggested the use of 304 stainless steel and its corrosion resistance, corrosion resistance and high temperature strength are particularly good, work hardening, which you can use under harsh conditions, the price must be higher.
