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MIL-DTL-81706

Chemical conversion coatings play an essential role in helping components meet demanding military and aerospace specifications. RIE Coatings applies chemical conversion coatings compliant with MIL-DTL-81706 for aerospace, defense and other high-performance applications. In these fields, consistent compliance is critical to success. As an AS9100-certified and ITAR-registered partner, we support controlled, repeatable surface treatments for aluminum alloys in mission-critical roles.

We understand the technical distinctions between AMS 2474 and current specifications and work with you to determine whether legacy spec compliance or updated alternatives best serve your application requirements.

Common use cases
  • Satellite
  • Drone
  • Fixed-Wing Components
  • Rotary Wing Components
PERFORMANCE CRITERIA
  • UV Protection
  • Aesthetics
  • Durability
Solutions & Capabilities
Specifications
  • ASTM B733
  • AMS 2473
  • MIL-A-8625
  • AMS 2472
  • AMS 2469
  • AMS 2404
  • AMS 2405
  • AMS2424

Certified Chemical Conversion Coatings for Defense and Aerospace

When programs require strict adherence to military standards, consistency is essential, especially in the demanding environments of aerospace and defense manufacturing. That’s why we provide chemical conversion coatings designed for reliability and quality.

MIL-DTL-81706 governs the chemical conversion materials used to create compliant finishes on aluminum alloys, including modern trivalent chromium processes, which are increasingly specified in aerospace and defense applications. As defense programs continue to evolve, many programs are adopting trivalent chromium systems to reduce reliance on older hexavalent chemistries. 

As the industry shifts to safer, more sustainable chemistries, partnering with RIE means you gain a proactive team. We’re ready to advise on drawings, specifications and compliance, supported by responsive engineering expertise.

Meeting Your MIL-DTL-81706 and MIL-DTL-5541 Requirements

While MIL-DTL-81706 governs the chemical conversion materials used in the process, the performance requirements for the finished conversion coating are defined by MIL-DTL-5541. Together, these specifications help ensure that approved materials are used to produce finishes capable of meeting the corrosion protection, conductivity and quality requirements of aerospace and defense applications.

Finishes for Corrosion Protection and Conductivity

MIL-DTL-5541 defines different finish classifications based on application requirements. For Class 1A applications, the focus is on maximum corrosion protection. These finishes are commonly selected when long-term durability in demanding environments is critical.

For Class 3 or low-resistance requirements, electrical conductivity becomes the priority. These finishes help maintain the low surface resistance necessary for grounding applications while still protecting the aluminum substrate. With flexible capacity and in-house labs, we can adapt quickly to changing specifications or testing requirements.

A Focus on Process Control

Our engineering-focused process and detailed review of your technical data package ensure every finish aligns to your exact project and production quality requirements. Through controlled processing and documented procedures, we help reduce variability and support repeatable performance across production runs.

The RIE Advantage: An Audit-Ready Quality System

Our AS9100-certified processes support the consistency, traceability, and documentation required for demanding programs. With every order delivered with a full certificate of conformance, your components remain fully traceable and always prepared for customer or regulatory audits. Combined with in-process oversight and rigorous quality standards, we provide a lower-risk path to compliant surface treatments.

Anodizing

This electrochemical surface treatment creates a corrosion-resistant oxide layer on aluminum, one of the industry’s primary structural materials. Real-world examples of its use include:

  • Safeguarding satellite housings and structures.
  • Building a hard, wear-resistant layer on helicopter rotor blades.
  • Protecting aircraft structural components from environmental degradation.

Chromating or chromate conversion coatings provide excellent corrosion resistance properties to aluminum components. They also provide a great surface for primer paint adhesion.

This coating appears in:

  • Components that require electrical bonding.
  • Aircraft aluminum alloys.

This treatment deposits a consistent, corrosion-resistant layer of nickel-phosphorus or nickel-boron alloy on components without using electricity.

It’s ideal for:

  • Sensitive components.
  • Restoring precise dimensional tolerances of worn parts.

Performance Benefits of Our Compliant Chemical Conversion Coatings

Our finishes help you overcome modern industry challenges, including durability in harsh conditions and strict electrical and assembly standards:

  • Improve corrosion protection: Conversion coatings applied to the correct specification protect aluminum substrates from environmental exposure and premature degradation.
  • Strengthen paint adhesion: Our process creates a chemically active surface that helps primers and topcoats bond more effectively for dependable performance over time. 
  • Preserve electrical performance: Our chemical conversion coating process for Class 3 requirements protects the substrate while maintaining the low surface resistance needed for grounding and conductivity.

In space, satellites experience solar radiation, considerable temperature changes and micrometeoroid and orbital debris impacts. Our coatings for satellites shield your components from these conditions, ensuring proper satellite functionality.

The lightweight construction of unmanned aerial vehicles increases their susceptibility to environmental factors. By applying coatings to drone wings and bodies, we empower you to supply durable equipment with less drag and better thermal control.

Fixed wings endure rain, sand, hail and temperature changes, which can lead to corrosion over time. To maintain structural integrity and performance, we apply commercial aircraft protective coatings, particularly along leading edges and fastener lines.

Rotor blades experience fatigue and environmental degradation over time. Our specialized coatings safeguard them from abrasion and corrosion to preserve their performance and structural integrity.

Benefits of Protective Coatings for the Aerospace Industry

Our solutions help each part of your build last longer, perform better, increase safety and maintain fuel efficiency.

Using our coatings provides key engineering benefits:

  • Stress corrosion cracking and material fatigue mitigation: Aviation coatings create robust barriers to safeguard vital components from degradation and failure, ensuring overall user safety and product reliability.
  • Component service life extension: Reduced exposure to the elements prolongs service life and reduces maintenance and repair frequency, lowering your customers’ operating costs and minimizing aircraft on ground situations.
  • Structural weight optimization: The lighter nature of modern coatings provides significant weight savings at the design stage and potentially improves fuel efficiency.
  • Enhanced hardness and wear resistance: Our high-temperature coatings for aircraft create hard barriers, providing superior resistance against component abrasion and wear.
GET STARTED WITH US

Get a Quote for Your MIL-DTL-81706 Project

Mission-critical components require chemical conversion coatings applied with precision, consistency and close attention to specification requirements. Let RIE Coatings help you ensure compliance and performance at every step. Submit your project details to receive a detailed quote today.

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