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 316 of 460

FED-STD-791D

Method 5329.2

September 30, 1986

CORROSION-PROTECTION (HUMIDITY CABINET)

1. SCOPE

1.1 This method is used for determining the effectiveness of corrosion-inhibiting

oils and compounds under conditions of high humidity.

2. SUMMARY

2.1 The test consists of dipping steel test panels in the test sample and then

placing them in a humidity cabinet. After the specified exposure time the panels are

removed and examined for the presence of rust.

3. SAMPLE SIZE

3.1 Approximately 500 mL of the oil to be tested.

4. REFERENCES, STANDARDS, AND APPARATUS

4.1 Standards.

4.1.1 ASTM D 1748 Rust Protection By Metal Preservatives In the Humidity

Cabinet.

4.2 Humidity cabinet conforming to Appendix I of ASTM D 1748 where the

following standard conditions must be maintained.

a. Air temperature:

Inside the cabinet: 49�  1�C (120�  2�F).

Outside the cabinet: 24�  5�C (75�  10�F).

b. Rate of air to the cabinet: 868  28 L (31  1 ft3) per hour at 25�C (77�F) and

76 cm of mercury.

c. Water in cabinet:

Level - 20.3  0.6 cm (8  1/4 in)

pH - 5.5. to 7.5

Oil content - clear with no evidence of oil

Chlorides - less than 20 ppm

Sulfates & sulfites - less than 20 ppm.

d. Speed of rotating stage - 0.33  0.03 rpm.

e. Cover - close fitting.

f. Cloth layers in cover - shall not be torn, contaminated, nor contain droplets of

water.

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