MIL-PRF-23377K
SAE INTERNATIONAL
SAE-AMS1640
- Compound, Corrosion Removing for Aircraft Surfaces
SAE-AMS-QQ-A-250/4 - Aluminum Alloy 2024, Plate and Sheet UNS A92024.
SAE-AMS-QQ-A-250/5 - Aluminum Alloy Alclad 2024, Plate and Sheet
UNS A82024.
(Copies of these documents are available from www.sae.org or SAE World Headquarters, 400
Commonwealth Drive, Warrendale, PA 15096-0001.)
2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a
conflict between the text of this document and the references cited herein, the text of this document
takes precedence. Nothing in this document, however, supersedes applicable laws and regulations
unless a specific exemption has been obtained.
3. REQUIREMENTS
3.1 Qualification. The primer coatings furnished under this specification shall be products
that are authorized by the qualifying activity for listing on the applicable qualified products list
in the qualified products database (QPD) before contract award (see 4.2 and 6.3). The material
supplied under contract shall be identical, within manufacturing tolerances, to the product
receiving qualification.
3.2 Material. Materials used in the manufacture of the primer coatings supplied under this
specification shall be products conforming to the requirements of this specification.
3.3 Toxicity. The primer coatings shall have no adverse effect on the health of personnel
when used for its intended purpose and with the precautions listed in 3.11, when evaluated in
accordance with 4.5.12 (see 6.8).
3.4 Composition. The primer coatings shall consist of two or three components, as follows:
Component A - a base component composed of epoxy resin and solvents.
Component B - a curing agent containing polyamide or amine resin and solvents.
Component C (optional) - thinning component composed predominately of organic solvents.
Component B shall act as the curing agent for component A. The components shall be packaged
separately and furnished as a kit (see 1.3.1). Pigments may be included with either component A
or B. When the components are mixed in the proportions specified by the manufacturer, a primer
coating meeting the requirements of this specification shall result. Chlorinated solvents, except
for para-chlorotrifluoromethylbenzene or equal, shall be prohibited in the formulation of these
primer coatings. Incidental cadmium and cadmium compounds shall be not greater than one part
per million (ppm). The non-volatile portion shall contain not more than 0.05 percent by weight
of lead metal or lead compounds.
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