MIL-DTL-81706B
use of type II is specified. Type II may not be substituted for type I, for either Class IA or Class
3, unless authorization for its use is given by the acquisition activity or engineering authority for
the system or item on which the conversion coating is applied.
6.1.1 Class 1A. Class 1A materials covered by this specification are intended for use in the
formation of chemical conversion coatings which are corrosion preventive films and will
improve adhesion of paint finish systems to aluminum and aluminum alloys.
6.1.1.1 Class 1A, form VI, method D. Class 1A, form VI, method D materials covered by
this specification are intended for use in the formation of conversion coatings for repair or touch-
up applications which are corrosion preventive and will improve adhesion of paint finish systems
to aluminum and aluminum alloys.
6.1.2 Class 3. Class 3 materials covered by this specification are intended for use in the
formation of chemical conversion coatings which are corrosion preventive films for electrical
and electronic applications where low resistance contacts are required.
6.1.3 Relationship with MIL-C-5541. The materials that have been approved in accordance
with the requirements of this document and have been accepted for listing on the applicable
qualified products list are used to produce coatings conforming to MIL-C-5541. MIL-C-5541
covers the requirements for chemical conversion coatings formed by the reaction of materials
qualified to this specification and applied to the surfaces of articles, items, parts, or components
made of aluminum and aluminum alloys.
6.2 Acquisition requirements. Acquisition documents should specify the following:
a. Title, number, and date of the specification.
b. Type and class required (see 1.2.1 and 1.2.2).
c. Form and application method of material to be furnished (see 1.2.3 and 1.2.4).
d. Unit of issue required (see 3.10).
e. Quantity required.
f. Lot size (see 4.3.1).
g. Packaging requirements (see 5.1).
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