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 82 of 460

FED-STD-791D

Method 3007.2

September 30, 1986

WATER DISPLACEMENT AND WATER STABILITY

1. SCOPE

1.1 This method is used to determine the water displacing ability of corrosion preventive

oils and their stability in the presence of water.

2. SUMMARY

2.1 Steel test panels are immersed in distilled water and then either the test oil or a water

emulsion of the test oil. After exposure in a static humidity chamber the panels are examined

for the presence of rust.

3. SAMPLE SIZE

3.l Approximately 60 mL of the test oil.

4. REFERENCES, STANDARDS, AND APPARATUS

4.l Standards

4.1.1 ASTM D 1748, Rust Protection by Metal Preservative In The Humidity Cabinet.

4.2 Static humidity chamber (a desiccator containing some distilled water).

4.3 Oven, forced draft, 54�  1�C (130�  2�F).

4.4 Desiccator, containing an indicating desiccant.

4.5 Panel hook, stainless steel (for handling panels during processing).

4.6 Erlenmeyer flasks, 125 mL.

4.7 Beakers, tall-form, 500 mL.

4.8 Petri dishes, 10 cm in diameter and 2 cm in height.

4.9 Controlled atmosphere (to provide 25�  3�C [77�  5�F]) and a maximum of 50

percent relative humidity.

4.10 Shaded fluorescent light. (A 15W balance illuminator type that will permit the

panel to be viewed from all angles at a distance of 3 in).