NADCAP – Aerospace Quality Systems (AC7004)

NADCAP – Chemical Processing

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.

Located in Linden, New Jersey, USA Paramount Metal Finishing has been providing State of the Art Coating Technology since 1949

Most metal and some plastic products are plated, painted, anodized or have some other coating applied to them. These coatings serve a variety of functions including solderability, RFI Shielding, lubricity, abrasion resistance, corrosion protection and aesthetic appeal. Some coatings are multi-functional, possessing several different properties.

Paramount Metal Finishing specializes in applying coatings on metal substrates in accordance with customer or military specifications. We apply over 50 different finishes on a regular basis and have the unique ability to plate, paint at one location. Cerakote Trained and Certified.

Paramount Metal Finishing is the approved finishing source for many manufacturers of:

• Military & Aerospace
• Industrial & Energy
• Medical
• Electronics
• Telecom
• Automotive & Railway

Paramount Metal Finishing has attained a reputation for supplying quality coatings and prompt service at a competitive price. Our versatility and technical ability has aided our customers in solving many of their purchasing problems. We look forward to working with you to produce a superior, competitive product. Our modern 75,000 sq. ft. facility is on the leading edge of Metal Finishing Technology.

Paramount Metal Finishing is a specialist in plating and painting finishes as well as a coating applicator 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. Paramount is also NADCAP for chemical film MIL-DTL-5541 types I and II; Anodizing MIL-A-8625, MIL-PRF-8625. All in 1 location!

MIL-A-8625, MIL-PRF-8625 Type II Soft Coat and Type III Hard Coat

ASTM B580, NADCAP certified

Anodize is an oxide coating that is a highly effective corrosion protection for aluminum alloys and cast aluminum alloys. Anodizing is an excellent bonding base for paint, powder, and adhesives. The oxide is a hard electrically dielectric coating that can be dyed to different colors for decorative and none decorative purposes. Hard coat anodizing often referred to as MIL-PRF-8625 Type III is a thicker coating with a high degree of abrasion resistance. Types II and III are the most common types of anodizing.

MIL-PRF-8625 is the military specification that applies to anodizing aluminum. It has several types and two classes. Paramount Metal Finishing applies two types of MIL-A-8625 and two classes. Paramount Metal Finishing applies MIL-A-8625 Type II and Type III with class l and ll. Class I is the natural color that comes from anodizing the alloy. The natural colors span from clear, grey, olive green and black and are determined by several factors such as the alloy, process parameters and coating thickness. Class II relates to a dying process that can produce a wide spectrum of colors by soaking in a dye solution prior to sealing the surface.

Anodizing capabilities applied by Paramount Metal Finishing:

• MIL-A-8625 or MIL-PRF-8625 Type II soft coat
• MIL-A-8625 or MIL-PRF-8625 Type III hard coat
• ASTM B580 Types A-F
• Size: 6 ft. long x 4 ft. deep and 20 inches wide
• Capacity: Hoist line- high production
• Color dyes: Natural, Black, Gold, Blue and colors on demand.
• Sealing options: Hot Water, Nickel Acetate, Sodium Silicate, Chromate
• Racking systems: high production titanium racking systems

Note: MIL-PRF-8625 replaces MIL-A-8625. Both are still commonly used on drawings.

Paramount Metal Finishing is a specialist in anodizing and is an integrated coating applicator 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.

Paramount Metal Finishing offers LARGE PARTS PLATING to ASTM, AMS and MILITARY Specifications for large and heavy components through the use of internal anodes. PMF has the capacity for large components such as rollers, frames, hydraulic manifolds and chambers that require partial or complete plating coverage.

PLATING LARGE PARTS

Electroless Nickel Plating

Zinc Nickel Plating

Zinc Plating w/Internal Anodes

Nitric Passivation

Electroless Nickel Plating