INCH-POUND
MIL-DTL-81706B
25 October 2004
SUPERSEDING
MIL-DTL-81706A
18 February 2002
DETAIL SPECIFICATION
CHEMICAL CONVERSION MATERIALS
FOR COATING ALUMINUM AND ALUMINUM ALLOYS
This specification is approved for use by all Departments and Agencies of the Department
of Defense.
1. SCOPE
1.1 Scope. This specification covers chemical conversion materials used in the formation
of coatings by the reaction of the material with the surfaces of aluminum and aluminum alloys.
1.2 Classification. The chemical conversion materials and application methods are of the
following types, classes, material forms, and methods.
1.2.1. Types. The chemical conversion materials are of the following types (see 6.2).
Type I Compositions containing hexavalent chromium.
Type II Compositions containing no hexavalent chromium.
1.2.2 Classes. The materials, which form protective coatings by chemical reaction with
aluminum and aluminum alloys, are of the following classes (see 6.2).
Class 1A - For maximum protection against corrosion, painted or unpainted.
Class 3 - For protection against corrosion where low electrical resistance is required.
Comments, suggestions, or questions on this document should be addressed to: Commander,
Naval Air Warfare Center Aircraft Division, Code 414100B120-1, Highway 547, Lakehurst,
NJ 08733-5100 or emailed to thomas.omara@navy.mil. Since contact information can
change, you may want to verify the currency of this address information using the ASSIST
Online database at www.dodssp.daps.mil.
AMSC N/A
AREA MFFP
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