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Steel passivation
for the petrochemical industryISO 9001

steel passivation
steel passivation
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Type of substrate
for the petrochemical industry
ISO 9001


Passivation Passivation is the removal of free iron or steel compounds from the surface of stainless steel by means of a chemical solution, most typically by a treatment with a nitric acid solution that will remove the surface contamination but will not significantly affect the stainless steel itself. A mild oxidant, such as a nitric acid solution, enhances the spontaneous formation of the protective, passive film. In layman's terms, the passivation process removes “free iron” contamination left behind on the surface of the stainless steel as a result of machining and fabricating processes. These contaminants are potential corrosion sites which, if not removed, result in premature corrosion and ultimately result in deterioration of the component. Below is the most common specifications for passivation. QQ-P-35 Type II Type VI ASTM-A-967 Nitric 1 Nitric 2 ASTM-A-380 Code G Code F
*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.