Passivation
Specification: QQ-P-35 • A-967-01
It is a chemical process carried out on stainless steel parts with the purpose of renewing the passive protective layer and improving corrosion resistance.
Metal
Stainless Steel
APPLICABLE SPECIFICATION
QQ-P-35
Type II – At intermediate temperature with a solution of nitric acid and sodium dichromate as an additive.
Type VI – At low temperature with nitric acid.
Type VII – At medium temperature with nitric acid.
Type VIII – At medium temperature with concentrated nitric acid.
NORMAL COATING THICKNESS, COLOR, OR APPEARANCE
There is no change in dimensions.
There is no change in appearance.
Comments
It dissolves all traces of foreign metals, such as iron particles and others, which can cause staining or oxidation if not removed.