Aerospace Passivation Services

At National Aerospace Processing (NAP), we are a NADCAP-accredited passivation service supplier. Our aerospace passivation services enhance the corrosion resistance and longevity of critical aerospace components. These aircraft passivation processes effectively remove contaminants, free iron, and other surface impurities. This ensures optimal performance of stainless steel and other alloys. As a trusted aerospace metal finishing company, NAP combines advanced processing technology with deep industry expertise to deliver reliable, high-quality passivation services.

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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

  • 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 in accordance with Method 1 nitric acid processing, using a lower nitric acid concentration (20–25% by volume). This approach is ideal for stainless steel components that may be sensitive to higher acid concentrations while still requiring aerospace-grade corrosion resistance. AMS-2700 Type 6 is widely specified throughout the aerospace industry for machined, fabricated, and precision stainless steel parts that demand consistent, validated corrosion protection.

Features & Benefits

  • Free Iron Removal & Passive Film Enhancement: Eliminates surface contamination while promoting formation of a stable, chromium-rich oxide layer
  • Aerospace Industry-Proven Process: Commonly used for critical components such as fuel system parts and hydraulic assemblies
  • OEM & Tier 1 Approved Specification: Frequently required by aerospace OEMs, defense contractors, and Tier 1 suppliers across numerous stainless steel alloys

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

As a specialized aerospace metal finishing provider offering passivation, ChemFilm, and surface treatment services, NAP utilizes a state-of-the-art 10-tank passivation system engineered for precision, repeatability, and industry compliance.

Our aerospace passivation process includes integrated DI (deionized) water rinses, controlled chemical application, and documented quality verification to support OEM, defense contractor, and Tier 1 supplier requirements. 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 services, NAP delivers compliant processing, corrosion protection, and documentation-ready quality assurance.

Choose NAP for 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 proven partner to aerospace OEMs, Tier 1 suppliers, and defense contractors, NAP delivers high-quality aircraft passivation services 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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