|
Letter 19701
Stainless steel pickle formula
+++
What chemicals or chemical pastes are effective in removing
discoloration from 304 stainless steel after T.I.G. welding? If the
compounds are proprietary, who is the supplier and where can they be
bought?
Lin Emery
studio - New Orleans, LA, U.S.
+++
There are a variety of ways to clean the weld discoloration. TIG
welding usually leaves the least of this problem, but you always have
some.
1) Use a nitric acid/ hydrofluoric acid paste (pickle paste). This
is very hazardous and should be handled with extreme care and
knowledge.
2) Grit blast with non-iron containing grit, then passivate.
3) Wire brush with 316ss brush or Scotchbrite cloth to clean off
discoloration, then passivate.
4) Electrically remove the discoloration with proprietary chemicals
and equipment. This method can be fast and easy.
Contact us if you want info on this. We cannot name it here.
Dear Reader, please --
- Answer or follow-up on this subject (in non-commercial
fashion).
-
- Post a new
question or inquiry on a different subject.
-
 |