As a chemist, I would not advocate using HF unless you've got the appropriate equipment/training..;-) It'll eat your bones...literally. As for nitric acid, that's not a novice friendly substance either. Pete's stainless steel case is nice, but if you want a matte look, find a local metalwork/fabrication shop and ask them if they can do it for you.
(another) Nick On Mon, Jun 9, 2014 at 8:07 AM, Nick <n...@desmith.net> wrote: > ...should have added that if you are in a really humid atmosphere, you may > need to re-passivate the stainless steel with some Nitric Acid - Google for > the method - basically, SS doesn't corrode largely because it has a layer > of CrO2 on its surface - when made, the SS is completely de-greased and > then pickled in Nitric Acid - this removes any free Fe from the surface > leaving the remaining Cr ions to react with oxygen to produce a layer of > Chromium Oxide a few molecules thick. > > 4Cr + 3O2 → 2Cr2O3 > > > In a dry atmosphere, the newly brushed SS will form its own passivation > layer in time... > > You can "matt" the surface with Hydrofluoric Acid (i.e., micro etch it) - > this works well but not all SS is the same and micro-etching is not > suitable for high-Sulphur steels (303 grade) and low-Nickel grades (400 > series). > > HTH > > Nick > > -- > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to neonixie-l+unsubscr...@googlegroups.com. > To post to this group, send email to neonixie-l@googlegroups.com. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/0832d5b2-4a2b-45e9-b9b3-41bb231f8f7c%40googlegroups.com > <https://groups.google.com/d/msgid/neonixie-l/0832d5b2-4a2b-45e9-b9b3-41bb231f8f7c%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/CAOX%2BRHJRzO3W3Wm%3DRXeoWcnKwyUKPw1wCJPYirCkO0WSZKTrWw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
