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.

Pages 1 - - 387 - 388 - 389 - 390 - 391 - 392 - 393 - 394 - 395 - 396 - 397 - 398 - 399 - 400 - 401 - 402 - 403 - 404 - 405|||

'�NOTE:This draft dated 15 April 2006' by DasH - Page 396 of 460

FED-STD-791D

Test Method 7502

August 7, 2006

SOLVENT CLEANING POWER BY A SOIL TEST METHOD

1. SCOPE

1.1 This test method is used for determining the cleaning power of solvents that

have been subjected to soiled mechanical parts. This Appendix is a mandatory part of the

specification. The information contained herein is intended for guidance only.

2. REFERENCED DOCUMENTS

2.1 Military Standards:

MIL-PRF-10924, Grease, Automotive, Artillery (GAA)

2.2 Federal Standards:

Federal Test Method Standard 791C, Method 5308.7 Corrosiveness and

Oxidation Stability of Light Oils (Metal squares)

3. SUMMARY OF METHOD

3.1 A small amount of grease applied to a steel coupon is immersed in the test

solvent and then placed in an ultrasonic cleaner maintained at up to 50 C. The grease is

dissolved by the solvent and removed from the steel coupon by the propagation of sonic

sound. The solvent power is determined based on the time to completely remove grease

from the coupon.

4. SIGNIFICANCE AND USE

4.1 This test method measures the solvency of all types of cleaners and

differentiates their cleaning powers.

5. APPARATUS

5.1 Ultrasonic Cleaner

5.2 Beaker, 200ml

5.3 Test specimen assembly

395