To evaluate the effectiveness of aqueous cleaners in removing several soils from brass coupons.
Date Run:
11/09/2023
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
Metalnox M6345 (current cleaner for comparison)
american lapping compound
0.0700
0.0574
18.00
13.59
40.92
0.1205
0.0966
19.83
0.1676
0.1627
2.92
LMKT lapping compound
0.1842
0.0248
86.54
81.08
0.1377
0.0559
59.40
0.0862
0.0024
97.29
honing oil
0.0234
0.0083
73.82
43.03
0.0355
0.0246
30.70
0.0619
0.0467
24.56
slide gel lubricant
0.0676
0.0360
46.75
25.99
0.0398
0.0398
26.43
0.0584
0.0556
4.79
Shopmaster LPH (50%)
american lapping compound
0.0958
0.0197
79.44
47.47
38.78
0.0862
0.0766
11.14
0.0791
0.0381
51.83
LMKT lapping compound
0.0866
0.0408
52.89
49.69
0.0624
0.0249
60.10
0.1291
0.0825
36.10
honing oil
0.0406
0.0183
54.93
43.22
0.0463
0.0163
64.79
0.0281
0.0281
9.94
slide gel lubricant
0.0585
0.0346
40.85
14.73
0.0478
0.0475
0.63
0.0538
0.0538
2.71
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
Conclusion:
Metalnox M6345 is only an effective cleaner in removing the LMKT lapping compound and is not an effective cleaner for any of the other soils. The Shopmaster LPH at 50% concentration is not an effective cleaner in removing any of the soils.
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