Strong alkalin cleaners, usually those that are made from caustic soda/sodium hydroxide/lye, won't pit stainless steel. It will however eat away and pit aluminum.
Hot caustic soda is used as an industrial oil and dirt cleaner for steel and in general won't harm it.
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Reply to comment by d4m1ty in How to fix/cover scratches on a metal stove? by stonedriller
Strong alkalin cleaners, usually those that are made from caustic soda/sodium hydroxide/lye, won't pit stainless steel. It will however eat away and pit aluminum.
Hot caustic soda is used as an industrial oil and dirt cleaner for steel and in general won't harm it.