Benefits of Nitric Passivation
AMS 2700, AMS-QQ-P-35, ASTM A967

Nitric passivation refers to a process in which a metal surface, particularly stainless steel, is treated with a nitric acid solution to remove contaminants and promote the formation of a protective oxide layer. This oxide layer enhances the corrosion resistance of the metal and offers several benefits. Paramount Metal Finishing offers nitric passivation of large and small parts to the following specifications AMS 2700, AMS-QQ-P-35 and ASTM A967.

Here are some of the key benefits of nitric passivation:

1. Corrosion Resistance: Nitric passivation helps to improve the corrosion resistance of stainless steel and other metals. The process removes surface contaminants, such as iron particles and embedded carbon, which can initiate corrosion. By creating a clean and passive oxide layer, the metal becomes more resistant to corrosion from exposure to various environmental factors, including moisture, chemicals, and high temperatures.
2. Surface Cleanliness: Nitric passivation effectively cleans the metal surface, eliminating contaminants such as dirt, grease, oils, and machining residues. By removing these impurities, the passivation process ensures a clean and sanitary surface, making it suitable for applications that require strict hygiene standards. This is why it is commonly used in pharmaceutical, biotechnology, medical and food processing industries where cleanliness is essential.
3. Improved Durability: The formation of a passive oxide layer through nitric passivation improves the durability and longevity of stainless steel. The protective layer acts as a barrier against corrosive substances, preventing them from reaching the underlying metal surface. This helps to prevent pitting, crevice corrosion, and other forms of localized corrosion that can degrade the metal over time, thus extending its lifespan.
4. Regulatory Compliance: In some industries, such as food and pharmaceuticals, regulatory standards and guidelines require the use of passivated stainless steel to ensure product safety and hygiene.
5. Cost Savings: Nitric passivation can contribute to cost savings in the long run. By enhancing the corrosion resistance and durability of stainless steel, the need for frequent repairs, replacements, and maintenance is reduced. It’s important to note that while nitric passivation offers several benefits, handling nitric acid requires expertise and adherence to safety measures to prevent accidents or harm.

Paramount Metal Finishing is an integrated applicator of Nitric Passivation, Electroless Nickel, Manganese Phosphating, Zinc Nickel and offers many other finishes to ASTM, AMS and Military Specifications. We have capabilities to Plate, Anodize, Hard Coat Anodize, Sanchem, Conversion Coat, Paint, Powder Coat and Dry Film Lube in one location. Visit our website www.pmf1.com. For an online quotation email us a drawing with RFQ details to sales.paramount@pmfnj.com or call us at 908-862-0772.