Chlorine (like that in salt) can eat thru and destroy the thin protectivelayer of passivation that protects stainless steel from corrosion. If chlorinegets on your stainless, clean it with fresh water immediately. Chlorine isto stainless, like cancer is to the human body.
Never use muriatic acid to clean tile or stone grout around a stainless steelrefrigerator or appliance. The fumes are enough to permanently discolor thestainless. Always remember - it's stain-less - not stain-proof.