Hi Juliana,
I'm no chemist and I can only comment on the methods we use here, but I do find the light duty alkaline cleaning solution of J84A (Supplied by McGean-Rohco Inc) or Turco 4181 is good for general cleaning. We have, on occasion used a acid strip solution for removing heat scale and oxide formation. This method needs a heated stainless tank (85o) and Turco Scale Gon 5 solution mixed with water. I'm not sure off hand what this stuff is but it seems to do the trick
Dunk your part in for 15-30 mins then rinse.
Jim