 |
|||
|
Page Title:
Grease removal, applicable to types I, II and IV only) |
|
||
| ||||||||||
|
|  MIL-C-10578D
4.3.6 Grease removal, applicable to types I, II and IV only).
Test panels of 18 gage, cold-rolled steel (0.5 by 2 ins.) shall
be prepared. Clean panels thoroughly, by sanding if necessary,
and degrease with trichlorethylene. Panels shall be scored 1.25
ins. from one end. Apply a uniform coating of grease conforming
to MIL-G-10924 to the lower 1.25 in. of surface of panels which
have been weighed to the nearest mg. A spatula is used for the
grease application. Wipe off the outer edges of the panels with
a clean rag. The grease coating shall weight 35 mg 5 mg.
Dilute, as specified in 4.3.4, a portion of the test sample and
the standard comparison compound specified in table II. Transfer
the diluted solutions to test tubes of suitable size. Immerse
panels completely in the test tubes by means of hooks made of
iron wire and let stand for 45 minutes. Remove each panel and
rinse by gently immersing 5 times in a beaker of water. Place
panels horizontally on absorbent paper and compare visually.
4.3.7 Inhibiting agents. Determine the presence of inhibiting
agents as required in 4.3.7.1 and 4.3.7.2.
4.3.7.1 Type I, II, IV, and V conditioners. Dilute the test
samples and comparison standards as specified in 4.3.4. Immerse
a shiny degreased ball bearing conforming to FF-B-171 in each of
the solutions. Allow to stand for 30 minutes, then remove and
rinse with cold water. If the ball bearing in the test
conditioner is dulled to a lesser degree than the ball bearing in
the standard control solution it indicates the presence of
inhibiting agents contrary to the requirements. (If the ball
bearing retains its original luster in the control solution, a
different kind of bearing should be obtained.)
4.3.7.2 Type III conditioner. Clean two panels of cold rolled
steel (1 by 0.5 by 0.03 in.) with abrasive cloth and wash
thoroughly with toluene or petroleum hydrocarbon solvent followed
by rinsing with anhydrous methanol. Weigh the panels to 0.1 mg
and place in test tubes each containing 50 mL of the compound
diluted as specified in 4.3.4 Maintain the samples at 77F
(25C) for 24 hours. Remove the panels, dry and weigh.
2
Calculate the corrosion rate in mg/dm per day. The corrosion
rate for a satisfactorily inhibited conditioner should no exceed
2
35 mg/dm per day.
4.3.8 Etching action (applicable to types I, II, IV and V
only). Dilute as specified in 4.3.4, 50 mL each of the test
compounds and of the comparison standard. Immerse identical
panels of the metals listed below in each of the diluted
solutions for 10 minutes at a temperature of 77 9F (25 5C).
Then remove the panels and examine for etching action.
8
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals