MIL-DTL-83488D
4.4.3 Corrosion resistance. In accordance with 4.2.1.2, test samples shall be corrosion
resistance tested as specified in ASTM B117 to determine conformance with 3.8 herein.
4.4.4 Base metal integrity. In accordance with 4.2.1.3, test samples shall have the Rockwell
B hardness measured in accordance with ASTM E18.
5.1
Packaging. For acquisition purposes, the packaging requirements shall be as specified in
the contract or order (see 6.2). When actual packaging of material is to be performed by DoD
personnel, these personnel need to contact the responsible packaging activity to ascertain requisite
packaging requirements. Packaging requirements are maintained by the Inventory Control Point's
packaging activity within the Military Department or Defense Agency, or within the Military
Department's System Command. Packaging data retrieval is available from the managing Military
Department or Defense Agency's automated packaging files, CD-ROM products, or by
contacting the responsible packaging activity.
6.
NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is
not mandatory).
6.1
Intended use. The high purity aluminum coatings covered by this specification are
intended for use as corrosion protective coatings on ferrous and aluminum alloy parts. The
requirements for coating low alloy steel, stainless steel, aluminum alloy, copper alloy, and titanium
alloy parts with high purity aluminum (99 percent plus) are military unique. Control of the
application process is absolutely critical because of the potential change in mechanical fatigue life
or strength on aluminum substrates to which the coating is being applied. Coating may be applied
by any process which produces a high purity (99 percent plus) aluminum coating. Ion vapor
deposited aluminum, sputtered aluminum, and aluminum electrodeposited using an organic
electrolyte are processes that meet this criteria. It can be used on high strength steel without
causing hydrogen embrittlement, for high temperature applications up to 925°F (496°C), and in
lieu of anodize on fatigue-critical aluminum structures. It can also be applied to copper, titanium,
and stainless steel alloys to provide corrosion compatibility with aluminum structure. Type II
(Chromate, see 3.4) high purity aluminum coating can also be used for applications which require
an electrically conductive surface such as electrical bonding and ground, and Electromagnetic
(EMI) Interference compatibility.
6.1.1 Class 1 and Class 2 coatings. Class 1 and Class 2 coatings are intended as general
purpose coatings where corrosion protection and/or dissimilar metal compatibility is required for
structural and functional ferrous and non-ferrous alloy parts.
6.1.2 Class 3 coatings. Class 3 coatings are intended as special purpose coatings where
corrosion protection and/or dissimilar metal compatibility is required for close tolerance or
threaded parts (such as bushings, pins, fastener, etc.).
6.2
Acquisition requirements. Acquisition documents should specify the following:
8