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 292 of 460

FED-STD-791D

Method 5306.5

September 30 1986

CORROSIVENESS OF EMULSIFIABLE CUTTING FLUIDS

1. SCOPE

1.1 This method is used for determining the corrosiveness of soluble cutting oils

and chemical type metal working fluids on brass, copper, cast iron, and steel.

2. SUMMARY

2.1 The test consists of placing a metal strip and the sample in a test tube. A

bubble tower filled with sodium hydroxide is used to permit air into the test tube at a

specified rate and temperature. The strip is examined for conformance with specification

requirement.

3. SAMPLE SIZE

3.1 Approximately 10 mL of the fluid to be tested.

4. REFERENCES, STANDARDS, AND APPARATUS

4.1 ASTM D 130 - Detection of Copper Corrosion from Petroleum Products by

the Copper Strip Tarnish Test.

4.2 Source of clean compressed air.

4.3 Air pressure regulator.

4.4 Approximately 7.3 m (24 ft) of 0.6-cm (1/4-in) I.D. rubber tubing.

4.5 Four screw type pinch clamps.

4.6 One bubble tower, capacity 500 mL.

4.7 Four test tubes, approximately 3.2 cm O.D. by 20.0 cm long.

4.8 Four pieces of glass tubing, 0.6  0.1 cm I.D. by 23.0  1 cm long.

4.9 Forceps, stainless steel.

4.10 Graduated cylinder, capacity, 250 mL.

4.11 Magnifier, 5X.

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