bipolarandy Posted October 17, 2008 Share Posted October 17, 2008 Which acid is best for taking off the Stainless steel oxide? So far wire brushing and tumbling in ceramic shot has not worked. Quote Link to comment Share on other sites More sharing options...
Steve Sells Posted October 17, 2008 Share Posted October 17, 2008 while many acids will remove it, the very nature of what make it stainless causes more chromium oxide to form upon contact with air. What do you want it for may help to advise you... Quote Link to comment Share on other sites More sharing options...
HWooldridge Posted October 17, 2008 Share Posted October 17, 2008 Nitric is used to passivate stainless. Google on "passivation of stainless steel" and you'll get all the info you need. Quote Link to comment Share on other sites More sharing options...
bipolarandy Posted October 17, 2008 Author Share Posted October 17, 2008 (edited) thanks HW, Steve, I forged some SS leaf key chains and they all came out with this beautiful gun metal grey finish, but it wasn't what i was going for, Edited October 17, 2008 by bipolarandy Quote Link to comment Share on other sites More sharing options...
ThomasPowers Posted October 17, 2008 Share Posted October 17, 2008 you may want to look into electro-polishing of stainless Quote Link to comment Share on other sites More sharing options...
craig Posted October 18, 2008 Share Posted October 18, 2008 When you say wire brushing do you mean by hand ? I would try a wire wheel on either a bench grinder or angle grinder if you have not done so already...?? I haven't done much with stainless but found wire wheel makes a huge difference when hand held brush has basically no effect. Just a suggestion. Certain stainless (I don't know what grade, but have seen sheet stainless turn orange with rust after being exposed to muriatic acid vapours) steel will corrode to a surprising degree with certain acids if not neutralized. Do you have any pictures ? Sounds interesting to take a look. Quote Link to comment Share on other sites More sharing options...
ThomasPowers Posted October 20, 2008 Share Posted October 20, 2008 If you want to keep stainless stainless any wire brushes need to be stainless and only used on stainless! Quote Link to comment Share on other sites More sharing options...
cwilliams Posted November 7, 2008 Share Posted November 7, 2008 Just a guess but sand blasting might work, or have you tried that? Chris Quote Link to comment Share on other sites More sharing options...
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