Aerospace Passivation Services

At National Aerospace Processing (NAP), we are Nadcap-accredited under AC7108/12 for standalone passivation, descaling, and electropolishing. Our passivation services meet AMS-2700 and ASTM A967 requirements, removing free iron and surface contamination from stainless steel without affecting tight tolerances. We routinely process 300-series stainless steel and precipitation-hardening grades like 15-5 PH and 17-4 PH for OEM, Tier 1, and defense programs. As a trusted aerospace metal finishing company, NAP combines proven processing technology with deep industry expertise to strengthen the passive oxide layer on every component. Our aerospace passivation services are backed by decades of hands-on experience and full quality documentation.

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Types of NAP Aerospace Passivation Services

AMS-2700 Type 8 Passivation (High-Concentration Nitric Acid)

NAP performs AMS-2700 passivation (Type 8, Method 1 nitric acid processing) for stainless steel components requiring enhanced corrosion resistance in demanding aerospace environments. A high-concentration nitric acid solution (45-55% by volume) is utilized at medium temperatures to strengthen the chromium oxide passive layer.

Features & Benefits of AMS-2700 Passivation:

  • Enhanced Corrosion Resistance: Reinforces the chromium-rich passive oxide layer on stainless steel to deliver long-term protection in aerospace and defense environments
  • Aerospace & Defense Specification Compliance: Processed in accordance with stringent aerospace and defense industry standards, including AMS-2700 requirements
  • Designed for Critical Aerospace Applications: Commonly specified for high-reliability stainless steel components requiring nitric acid passivation in mission-critical systems

AMS-2700 Type 6 Passivation (Method 1 Nitric Acid)

NAP performs AMS-2700 Type 6 passivation under Method 1 nitric acid processing, using a lower acid concentration (20-25% by volume) within our Nadcap AC7108/12 scope. This approach suits stainless steel parts sensitive to higher acid levels, including 300-series and precipitation-hardening grades like 17-4 PH, while still meeting aerospace-grade corrosion resistance. AMS-2700 Type 6 is widely specified for machined and precision stainless steel parts that demand consistent, validated corrosion protection without dimensional change.

Features & Benefits

  • Free Iron Removal & Passive Film Enhancement: Removes surface contamination while forming a stable, chromium-rich oxide layer on 300-series and PH stainless steel alloys
  • Aerospace Industry-Proven Process: Commonly used for critical components such as fuel system parts and hydraulic assemblies, including 15-5 PH and 17-4 PH hardware
  • OEM & Tier 1 Approved Specification: Frequently required by aerospace OEMs, defense contractors, and Tier 1 suppliers, and covered under our Nadcap AC7108/12 accreditation

ASTM A967 Passivation Services (Nitric & Citric Acid)

NAP provides ASTM A967-compliant passivation services for stainless steel components used in aerospace, defense, and industrial applications. This industry-recognized specification defines chemical passivation treatments designed to remove free iron contamination, improve surface cleanliness, and enhance corrosion resistance across stainless steel grades. NAP supports both nitric acid passivation and citric acid passivation under ASTM A967, allowing customers to select the appropriate chemistry based on alloy composition, performance requirements, and environmental considerations.

Features & Benefits

  • Dual Chemistry Capability: Offering nitric acid and citric acid passivation methods in accordance with ASTM A967 process requirements
  • Broad Stainless Steel Compatibility: Suitable for a wide range of stainless steel grades and product forms, including machined and fabricated components
  • Environmentally Responsible Option: Provides a more eco-friendly alternative for meeting aerospace-level corrosion protection standards

Certified Stainless Steel Surface Treatment for Aerospace & Defense Components

NAP is a specialized provider of aerospace passivation services, offering ChemFilm and surface treatment solutions alongside a state-of-the-art 10-tank passivation system, Nadcap-accredited under AC7108/12 and engineered for precision, repeatability, and industry compliance.

Our passivation process includes integrated DI (deionized) water rinses, controlled chemical application, and documented quality verification for OEM, defense contractor, and Tier 1 supplier requirements across 300-series and precipitation-hardening grades like 15-5 PH and 17-4 PH. For aerospace manufacturers searching for a qualified contractor offering certified passivation as part of a turnkey metal finishing solution that includes ChemFilm and Teflon® (PTFE) coating, NAP delivers compliant processing, corrosion protection, and documentation-ready quality assurance.

Quality Verification for Aerospace Passivation

NAP verifies the integrity of passivated aerospace components using strict, documented testing. Engineers require exact proof of a stable passive layer on stainless steel alloys, and our Nadcap-accredited facility provides this objective validation as part of a reliable passivation service built on documented, repeatable results. We execute specific testing protocols to confirm the results of our AMS-2700 and ASTM A967 passivation treatments.

We apply copper sulfate testing to detect residual free iron and surface contaminants and confirm that the stainless steel is properly prepared. We also use water immersion testing as the standard verification for evaluating newly formed passive layers.

To assess environmental resilience, we perform high humidity testing to verify the corrosion resistance of the treated part. In addition, we conduct salt spray testing according to ASTM B117 standards to validate long-term durability under harsh aerospace conditions. These detailed quality assurance methods ensure that our critical aircraft components meet exact defense and commercial requirements. By objectively confirming the removal of surface impurities and the stability of the chromium oxide layer, NAP provides certified, reliable passivation services backed by concrete testing data.

Choose NAP for Reliable Passivation Services 

Since 1979, National Aerospace Processing (NAP) has been a trusted name in aerospace finishing. NAP delivers precision and reliability that meet the wide-ranging passivation needs of the aerospace industry. Our Northeast Ohio facility maintains certifications for Nadcap-accredited passivation (AC7108/12) and Nadcap-certified aerospace quality system (AC7004) to ensure the highest level of compliance and quality control.

As a reliable passivation service for aerospace OEMs, Tier 1 suppliers, and defense contractors, NAP delivers high-quality aircraft passivation for mission-critical components. When your project demands industry-leading expertise and certified metal finishing services – NAP meets the challenge.

Time Is Money – Contact Us Today!

Contact our technical staff to learn how National Aerospace Processing can help you reduce lead times, streamline your processes, and deliver top-notch quality. Request a quote or reach out for more information today.

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