To evaluate the effectiveness of aqueous and non aqueous cleaners in removing a variety of oil and grease soils from brass.
Date Run:
11/14/2023
Experiment Procedure:
Twenty four brass coupons, three per soil per cleaner, were weighed to record their initial weights. The coupons were then soiled with their respective soils; american lapping compound, 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 20 minutes of unheated ultrasonics in their respective cleaners. Once cleaned, the coupons were left the air dry over night. The next day, the final weightss of the coupons were recorded.
Trial Results:
Cleaner
Soil
Initial wt of cont.
Final wt of cont.
%Cont Removed
% AVG
% Overall
Micro 90 (100%)
american lapping compound
0.0581
0.0303
47.85
-18.02
-185.14
0.0801
0.0656
18.10
0.0390
0.0858
-120.00
LMKT lapping compound
0.0257
0.0881
-242.80
-343.50
0.0197
0.0711
-260.91
0.0112
0.0702
-526.79
honing oil
0.0347
0.0558
-60.81
-174.03
0.0176
0.0730
-314.77
0.0230
0.0567
-146.52
slide gel lubricant
0.0578
0.0754
-30.45
-205.01
0.0352
0.1111
-215.62
0.0248
0.1163
-368.95
SC Aircraaft and Metal Cleaner (100%)
american lapping compound
0.0880
0.0392
55.45
31.72
52.74
0.0386
0.0263
31.87
0.0382
0.0352
7.85
LMKT lapping compound
0.0394
0.0022
94.42
64.05
0.0128
0.0122
4.69
0.0316
0.0022
93.04
honing oil
0.0163
0.0095
41.72
50.93
0.0133
0.0022
83.46
0.0373
0.0270
27.61
slide gel lubricant
0.0806
0.0122
84.86
64.27
0.0527
0.0159
69.83
0.0349
0.0216
38.11
The Micro 90 left a very sticky and thick residue that could not be removed by air drying overnight or by using the heat gun as a drying step post cleaning. This accounts for the added weight of the coupons in the results.
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
Conclusion:
Neither the Micro 90 (1005) nor the SC Aircraft and Metal Cleaner (100%) are effective cleaners in removing any of the soil types.
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