Originally Posted by wood7588
I have a question I hope someone with knowledge about Stainless Steel could answer for me. I have some SS washers with an inside diameter about 1/16" smaller than I want for a homemade weldless bulkhead I am installing. Are Stainless washer stainless through out or is it a coating like galvanized washers? Can I drill/grind the centers larger without rendering the Stainless open to staining and rust? If I can drill or grind them is there anything I should watch out for?
stainless is an oxide coating on a base alloy of steel and chromium. it is usually not advised to use steel tools on stainless. that being said they are just washers try it, then drop them in star san for about 10 min. rinse and towel dry to remove all moisture then just let them sit around for a few days. the star san is an acid and my LHBS told me that between the soak and several days air exposure will help reform the oxide coating. I tried it on some rust spots on the outside of my cornies and it seemed to work.