TT-P-28 Paint, Aluminum, Heat ResistingThis specification covers aluminum pigmented, heat resisting paint that will withstand solvents and elevated temperatures.

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TT-P-28H

TABLE IV. Test methods - Continued.

Required test	Applicable method in FED-STD-141	ASTM method	Inspection paragraph	Requirement paragraph
Storage stability: Partially full container Full container	3021 3022	--- ---	4.5.8.1 4.5.8.2	3.4.2.1 3.4.2.2
Brushing properties1/, 2/	4321	---	4.5.9	3.4.3
Spraying properties	4331	---	4.5.10	3.4.4
Heat resistance: - Hot rolled metal - Cold rolled metal2/	--- ---	--- ---	4.5.11.1 4.5.11.2	3.4.5 3.4.5
Salt spray resistance: - Hot rolled metal - Cold rolled metal2/	--- ---	B117 B117	4.5.12 4.5.12	3.4.6 3.4.6
Water resistance	---	D1308	4.5.13	3.4.7
Hydrocarbon fluid Resistance	---	D1308	4.5.14	3.4.8
Toxicity	---	---	4.5.15	3.4.9
Solvents and hazardous air pollutants (HAPs)	7356 7360	E1252	4.5.17	3.3.2
Hazardous metal content	---	---	4.5.18	3.3.3
Material safety data sheets (MSDS)1/	---	---	---	3.5
Directions for mixing and applying	---	F7181/	---	3.6
Knife adhesion	6304.2	---	4.5.11.1.2	3.4.5.1 3.4.5.2

NOTES:

1/ Lot conformance test for Type I

2/ Qualification test not applicable to Type II

3/ Lot conformance test for Type II (see 4.3.2)

4.5 Tests.

4.5.1 Test conditions. The routine and referee testing conditions shall be in accordance with ASTM D3924 except as otherwise specified herein. All temperatures and dimensions are nominal unless a specific limit is otherwise indicated.

4.5.1.1 Test paint films (type I). All paint films shall be 20.3 to 30.5 microns (0.0008 to 0.0012 inch; 0.8 to 1.2 mils) in dry film thickness per coat, unless otherwise specified. The dry film thickness shall be measured after the coated panel has been baked at 204 °C (400 °F) for 15 minutes. If the test method specifies that the film is not to be heated, the DFT shall then be measured after the 24-hour ambient temperature cure.

4.5.1.1.1 Test paint films (type II). Type II paint test films shall be applied at a dry film thickness (nominal 3 mils) applied in accordance with the powder coating manufacturer's recommendations for powder coatings to meet the requirements of this specification.