In the years I have worked with stainless steel and other metals, I have yet to see where any of the types of stainless steel have reacted with the pickle solutions (acid baths) that are used in ferrous metal work. Straight steel types of metals, will react. Some more than others. The chemistry used in photography is a more gentle version of what the pickle solutions that are used in metal working. Stainless steel is used primarily in non ferrous work to make the tongs (all types of stainless steel used can't remember the number designation or whether oil hardened or water hardened versions off the top of my head, for all of them) that are used to pull metals out of the pickle baths. This specifically since they do not react with the acids used for pickles (forms of sulphuric acid) as for the basic solutions used in photography, they have no effect either.