Stainless Colour removal

[Cobra]

Is there an easy chemical method to remove the heat discolouration on welded stainless steel?

 

[Ray C]

Muriatic acid (aka Hydrochloric acid, aka pool acid, aka concrete etching acid). Careful... it can easily cause skin burns -much worse than typical drain cleaners etc.

Ray

 

[brino]

....and as stated here:
https://www.hobby-machinist.com/threads/mill-scale-removal.69607/post-582880
and here:
https://www.hobby-machinist.com/threads/mill-scale-removal.69607/post-582897
do not leave the container near your good equpiment.
-brino