FED-STD-791D
4.7 Support Rods - flexaframe or equivalent.
4.8 Flexible Tygon Tubing - 0.96 cm I.D.
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 Steel Specimen - disk with 5.4 cm diameter and thickness of 0.16 cm, made
of carbon steel conforming to FS 1010 with a 0.08 cm hole for handling disk with wire.
5.3 Synthetic Sea Water-Sulfurous Acid Test Solution - synthetic sea water
(Formula ASTM D 1141 - 41.95 g/L, 900 mL with 2 mL sulfurous acid [not less than
6.0% assay as S02]).
5.4 Aluminum Oxide Cloth - 240 grit.
5.5 1,1,1-Trichloroethane (MIL-T-81533) [2,1,0].
5.6 Distilled Water (ASTM D 1193 - Type III).
5.7 Sulfurous acid, ACS [u,u,u].
6. PROCEDURES
6.1 Prepare test specimens as follows:
a. Degrease test specimens in 1,1,1-trichloroethane (MIL-T-81533).
b. Hand polish surface to be tested with 240 grit aluminum oxide cloth
to a surface finish of (0.25 to 0.50 m).
c. Repeat step (a).
d. Allow specimens to dry and store in a dust-free container.
e. Apply solid-film lubricant to surface of steel specimen by spraying
to produce a film thickness between 0.0005-0.0013 cm
(0.0002-0.0005 in) and cure film in accordance with specification
requirements.
f. Handle the specimen at all times with a hook.
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