FED-STD-791D
Method 3816.1
September 30, 1986
FILM THICKNESS OF DRY SOLID FILM LUBRICANTS
1. SCOPE
1.1 This method provides a means for measuring the film thickness of dry film
lubricants.
2. SUMMARY
2.1 The thickness of a coated and uncoated aluminum panel is measured in four
specified areas using a template and precision micrometer. The difference in readings
represents the film thickness of the lubricant.
3. SAMPLE SIZE
3.1 240 mL (8 oz) of solid-film lubricant in a mixture of sprayable consistency.
4. REFERENCES, STANDARDS, AND APPARATUS
4.1 Binks Spray Gun, Model 18, with a 66 SD Head attachment (Binks
Manufacturing Company, Chicago, Illinois or equal).
4.2 Vernier micrometer capable of measuring to the nearest 0.0025 mm (0.0001
in), or an equivalent measuring device.
4.3 Template - 7.6 15.2 cm (3 6 in) with four 0.95-cm (3/8-in) holes centered
3.8 cm (1-1/2 in) in from the 7.6-cm side and 1.6 cm (5/8 in) in from the 15.2-cm side
(see Figure 1).
5. MATERIALS
5.1 CAUTION: SOME MATERIALS ARE TOXIC AND HAZARDOUS. The
chemical materials listed in this section must be handled carefully. Federal Test Method
10000, Material Handling Safety Precautions, is a reference which lists all toxic and
hazardous materials cited in FTMS 791. The synonyms, life hazard, flammability,
handling and storage precautions, emergency treatment and measures, and spill practices
of each chemical are explained.
5.2 Aluminum alloy test panel conforming to ASTM B 209, 7.6 15.2
0.051
cm (3 6 0.020 in) thick, anodized in accordance with MIL-A-8625, Type 1.
5.3. 1,1,1-Trichloroethane (MIL-T-81533) [2,1,0].
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