FED-STD-791D
Method 5322.2
September 30, 1986
CORROSIVENESS OF OIL ON A BIMETALLIC COUPLE
1. SCOPE
1.1 This method is used for determining the corrosive effect (chemical or
electrochemical) of an oil on a bimetallic couple.
2. SUMMARY
2.1 The method consists of fitting a brass clip to the oil-coated surface of a steel
disk, storing the assembly in a humidity cabinet for 10 days, and visually inspecting the
assembly for evidence of corrosion.
3. SAMPLE SIZE
3.1 Approximately 2 g of the oil to be tested.
4. REFERENCES, STANDARDS, AND APPARATUS
4.1 Humidity cabinet, approximately 50% relative humidity.
4.2 Magnifier, 10X.
4.3 Desiccator, containing desiccant.
4.4 Stirring rod, glass.
5. MATERIAL
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 disks, (3) (ASTM A 322, composition G52986), heat treated to
Rockwell C-62, 2.54 cm (1 in) diameter by 1.25 to 2.54 cm (1/2 to 1 in) thick ground on
one side to 0.508 μm (20 μin) rms prior to hand-polishing (see 6.1.2). This treatment
need not be repeated prior to each test unless the disks are badly corroded.
310
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business