To evaluate the effectiveness of aqueous and non aqueous cleaners in removing a variety of oil and grease soils from brass.
Date Run:
12/20/2023
Experiment Procedure:
Eighteenr brass coupons, three per soil per cleaner, were weighed to record their initial weights. The coupons were then soiled with their respective soils; LMKT lapping compound, Honing oil, and slide gel lubricant. About 0.5 grams of each soil was spread on the bottom third of each coupon with a swab. The dirty weights of the coupons were then recorded. The coupons were then subjected to 15 minutes of heated ultrasonics at 140 F in their respective cleaners. Once cleaned, the coupons were left the air dry over night. The next day, the final weights of the coupons were recorded.
Trial Results:
Cleaner
soil
Initial wt of cont.
Final wt of cont.
%Cont Removed
% AVG
% Overall
Surface Cleanse 930 10%
LMKT Lapping Compound
0.0173
0.0148
14.45
-25.43
-154.90
0.0160
0.0367
-129.38
0.0189
0.0116
38.62
Honing Oil
0.0103
0.0135
-31.07
-345.12
0.0053
0.0346
-552.83
0.0068
0.0375
-451.47
Slide Gel
0.0188
0.0282
-50.00
-44.91
0.0312
0.0508
-62.82
0.0210
0.0256
-21.90
Shopmaster LPH 10%
LMKT Lapping Compound
0.0093
0.0374
-302.15
-204.12
-84.62
0.0074
0.0258
-248.65
0.0216
0.0349
-61.57
Honing Oil
0.0335
0.0212
36.72
50.58
0.0557
0.0252
54.76
0.0506
0.0201
60.28
Slide Gel
0.0155
0.0349
-125.16
-100.32
0.0278
0.0455
-63.67
0.0206
0.0437
-112.14
It is important to note that the cleaners did not evaporate off the coupons over night. The clean weights thus include the weight of the cleaner.
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
Conclusion:
It would be worthwhile to test these cleaners again with the addition of a post cleaning drying step to get more accurate data.
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