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MIL-DTL-81706
Type II

Specifications

Technical Notes

Types

The chemical conversion materials are of the following types:

  • Type I – Compositions containing hexavalent chromium.
  • Type II – Compositions containing no hexavalent chromium.

Classes

The materials, which form protective coatings by chemical reaction with aluminum and aluminum alloys, are of the following classes:

  • Class 1A – For maximum protection against corrosion, painted or unpainted.
  • Class 3 – For protection against corrosion where low electrical resistance is required

Material Forms

Chemical conversion materials are of the following forms:

  • Form I – Concentrated liquid
  • Form II – Powder
  • Form III – Premixed liquid (ready for use touch-up brush application)
  • Form IV – Premixed liquid, thixotropic (ready for use)
  • Form V – Premeasured powder, thixotropic (ready for use after addition of water)
  • Form VI – Premixed liquid (ready for touch-up use in self-contained applicator device)

Application Methods

Chemical conversion materials are of the following application methods:

  • Method A – Spray
  • Method B – Brush-on or wipe-on
  • Method C – Immersion
  • Method D – Applicator pen or pre-saturated applicator device

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Resources

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Services & Capabilities

Electroplating
Anodizing
Passivation
Plating Substrates
Pre- & Post-Process Treatments
Dedicated Outsourced Finishing
electroplating-1

Electroplating

Electroplating

Electroplating is a process by which one metal is deposited onto a base metal (substrate). These deposited metals offer a variety of benefits including thermal and electrical conductivity, corrosion resistance and more. AOTCO electroplates a wide variety of both standard and exotic metals.

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IMG_3850-2-1

Anodizing

Anodizing

Sometimes called a “conversion coating” Anodizing is an electrolytic process in which an oxide (anodic) layer is chemically built on the surface of the substrate material, providing anti-corrosion and other benefits. AOTCO offers, Type I, Type 2, Type 3 and Titanium anodizing services.

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Meal-Finishing-AOTCO-Service

Passivation

Passivation

Passivation is a term for a variety if processes that make a metal (most commonly stainless steel) or other substance unreactive, or passive, by altering the surface layer or coating the surface with a thin inert layer. AOTCO performs both citric and black oxide passivation techniques to a range of specifications.

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Beryllium

Plating Substrates

Plating Substrates

AOTCO plates on a wide variety of Common, Exotic and Non-Metallic substrates, bringing exceptional expertise to magnesium, titanium, beryllium, BeCu, TeCu, tungsten and more. In some cases we pass as high as 450 degrees celsius, allowing for high temperature soldering, brazing, or post machining operations after plating.

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Laser-Engraving-AOTCO-Service

Pre- & Post-Process Treatments

Pre- & Post-Process Treatments

Pre-Process: In addition to offering both mechanical & chemical cleaning options, AOTCO specializes in creating solutions for complicated, difficult and tight-tolerance masking challenges. Post-Process: For clients with specialized needs AOTCO offers laser marking and engraving options, including color change caused by chemical or molecular changes, charring, foaming, melting, ablation, and more.

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captive-plating-AOTCO-Service

Dedicated Outsourced Finishing

Dedicated Outsourced Finishing

Part of our cornerstone goal of building long-term, collaborative & solution-oriented partnerships, AOTCO will devote reserved physical and human resource capacity for our clients with long-term finishing and deadline requirements. For these partnerships our commitment is that AOTCO manages the process, while YOU control the results.

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