FED-STD-791 Lubricants, Liquid Fuels, And Related Products, Testing Method OfThis test method standard is composed of standard test methods for sampling, inspecting and testing lubricants, liquid fuels and related products. It is issued pursuant to the Federal Property and Administration Services Act of 1949, as amended and its application to the purchase of commodities referred to herein is mandatory on all Federal agencies.

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'�NOTE:This draft dated 15 April 2006' by DasH - Page 285 of 460

FED-STD-791D

Method 5304.5

September 30 1986

CORROSIVENESS OF GREASES OR SEMI-SOLID PRODUCTS AT 25�C

1. SCOPE

1.1 This method is used for determining the presence of corrosive compounds in

grease or other semi-solid products at room temperature (25�C; 77�F).

2. SUMMARY

2.1 The method consists of half-covering two copper strips with the product

under test and examining for corrosion after 24 h.

3. SAMPLE

3.1 Approximately 5 g of material to be tested.

4. REFERENCES, STANDARDS, AND APPARATUS

4.1 Watch glass for covering sheets.

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 measure, and spill practices

of each chemical are explained.

5.2 Copper strips (2), (ASTM B 152/152M), 2.5 x 2.5 x 0.3 cm (1 x 1 x 1/8 in).

5.3 n-Hexane (ACS) [1,3,0].

5.4 Acetone (ASTM D 329).

5.5 Abrasive paper (silicon carbide or alumina), various grade of grit.

5.6 Abrasive paper, silicon carbide, 240 grit.

5.7 Silicon carbide, 150 mesh.

5.8 Cotton, absorbent.

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