FED-STD-791D
Method 5309.5
September 30, 1986
CORROSIVENESS OF GREASES
(Copper Strip, 100C)
1. SCOPE
1.1 This method is used for determining the corrosive properties of grease at
elevated temperatures.
2. SUMMARY
2.1 The test consists of partially immersing a copper strip in the sample at 100C
for 24 h then visually examining both sample and strip for evidence of corrosion.
3. SAMPLE SIZE
3.1 Approximately 20 mL of grease to be tested.
4. REFERENCES, STANDARDS, AND APPARATUS
4.1 Oven, 100C.
4.2 Microscope, approximately 60X diameter magnification.
4.3 Test tube, clean, dry, approximately 2.5 cm diameter by 10 cm long.
4.4 Support (beaker) for holding test tube approximately vertical.
4.5 Forceps, stainless steel.
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 Copper strip (Copper and Brass Research Association No. 110 Electrolytic
Grade), soft tempered, annealed, approximately 1.3 7.6 0.15 cm or 0.3 cm.
301
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