structural1
Mechanical
- Dec 1, 2002
- 7
Dear Friends,
While working on passivation, (65% nitric acid bath for 30 minutes), for the stainless steel finished works, i faced the following problem: some of the products changed color and turned to be like dark color on the surface.
If you can help me i would be glaful.
Regards.
Wissam Khoury.
While working on passivation, (65% nitric acid bath for 30 minutes), for the stainless steel finished works, i faced the following problem: some of the products changed color and turned to be like dark color on the surface.
If you can help me i would be glaful.
Regards.
Wissam Khoury.