To evaluate the effectiveness of aqueous-based and solvent-based cleaners at the removal of American Lapping Compound by S.E Shires using heated immersion on copper, brass, and copper/nickel (90/10) substrates by gravimetric and visual analysis.
Date Run:
03/27/2020
Experiment Procedure:
Three pre-weighed coupons per substrate were soiled with American Lapping Compound, using a cotton swab. Each set of coupons were immersed into a beaker with one of the six cleaners for 30 minutes at the recommended temperature. During this process, any noticeable soil removal was observed at five minute intervals. After immersing, final weights were recorded and efficiency was calculated for each coupon cleaned.
Trial Results:
The soil visually was not removed from each substrate for each cleaner. After drying for 24 hours, some coupons were still wet from the cleaner, indicating the soil may have absorbed moisture causing a negative percent contaminant removal.
Cleaner
Temperature (⁰F)
Substrate
Initial wt of cont.
Final wt of cont.
%Cont Removed
% Average
Overall % Removal
Aquavantage 1400 10%
130
Copper
0.5628
0.5622
0.11
0.07
-0.46
0.4427
0.4425
0.05
0.6854
0.6851
0.04
Brass
0.5269
0.5269
0.00
-0.03
0.6078
0.6078
0.00
0.6471
0.6476
-0.08
Copper/Nickel
0.2655
0.2740
-3.20
-1.43
0.3271
0.3288
-0.52
0.2418
0.2432
-0.58
Surface Cleanse 930 5%
130
Copper
0.3485
0.3946
-13.23
-10.78
-10.23
0.4546
0.4951
-8.91
0.3292
0.3628
-10.21
Brass
0.4083
0.4505
-10.34
-7.52
0.4678
0.4887
-4.47
0.3742
0.4032
-7.75
Copper/Nickel
0.2624
0.2970
-13.19
-12.38
0.2464
0.2949
-19.68
0.2720
0.2836
-4.26
SC Aircraft & Metal Cleaner 5%
130
Copper
0.4271
0.4263
0.19
0.45
0.77
0.5026
0.5014
0.24
0.4486
0.4445
0.91
Brass
0.3207
0.3198
0.28
0.32
0.3558
0.3545
0.37
0.7226
0.7204
0.30
Copper/Nickel
0.5181
0.4963
4.21
1.55
0.2987
0.2981
0.20
0.3003
0.2996
0.23
Micro 90 2%
130
Copper
0.4578
0.4535
0.94
1.38
2.10
0.4464
0.4401
1.41
0.3718
0.3651
1.80
Brass
0.3912
0.3855
1.46
2.47
0.4484
0.4396
1.96
0.5194
0.4987
3.99
Copper/Nickel
0.3278
0.3245
1.01
2.46
0.2653
0.2606
1.77
0.2832
0.2702
4.59
LF2100 5%
130
Copper
0.4916
0.4887
0.59
-4.88
-2.65
0.6743
0.4938
26.77
0.4232
0.6009
-41.99
Brass
0.5039
0.6260
-24.23
-3.08
0.6477
0.5730
11.53
0.4210
0.4064
3.47
Copper/Nickel
0.3576
0.3619
-1.20
0.02
0.4790
0.4805
-0.31
0.2877
0.2832
1.56
Liquinox
130
Copper
0.3873
0.3808
1.68
4.38
3.48
0.3714
0.3361
9.50
0.6031
0.5913
1.96
Brass
0.5064
0.5011
1.05
3.05
0.4938
0.4810
2.59
0.4466
0.4220
5.51
Copper/Nickel
0.4393
0.4365
0.64
3.01
0.3918
0.3904
0.36
0.2599
0.2390
8.04
Success Rating:
Test showed little or no promise.
Conclusion:
Each cleaner was not effective in removing American Lapping Compound contaminant from copper, brass, and copper/nickel (90/10) coupons. Next step is to only test only on copper coupons with a higher dilution unheated based on vendor recommendation before adding ultrasonics.
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