To evaluate the effectiveness of four TCE aqueous alternatives at removing lubricating oils from copper alloys.
Date Run:
02/20/2018
Experiment Procedure:
Nine copper coupons were tested for each cleaner. Initial weights were recorded, and three coupons were soiled for each contaminant using a handheld swab to cover the bottom third of the substrate. The coupons were then immersed, three at a time, in a beaker with 250ml of the chosen diluted cleaner at room temperature (68F) for ten minutes. Visual observations were taken during this time, and final weights were recorded after cleaning. This process was repeated for each cleaner on all three contaminants.
Trial Results:
Cleaner
Soil
Initial wt
Final wt
%Removed
Avg %Removed
Overall % Removed
Shopmaster
Oak 15A
0.0333
0.03323
0.30
1.56
8.19
-0.0262
-0.0269
2.67
0.0142
0.0132
7.04
Oak 941A
0.0731
0.0505
30.92
15.43
0.0478
0.0412
13.81
0.0254
0.0250
1.57
M4
0.0790
0.0750
5.06
7.58
0.1323
0.1107
16.33
0.0660
0.0651
1.36
Solution 2000
Oak 15A
0.0689
0.0698
-1.31
-11.03
-2.50
0.0359
0.0414
-15.32
0.0255
0.0297
-16.47
Oak 941A
-0.4644
-0.4668
-0.52
3.19
0.0295
0.0270
8.47
0.0310
0.0305
1.61
M4
0.2118
0.2134
-0.76
0.33
0.1250
0.1025
0.00
0.1258
0.1236
1.75
SC Aircraft
Oak 15A
0.0539
0.0495
8.16
4.02
2.69
0.0365
0.0340
6.85
0.0374
0.0385
-2.94
Oak Draw 941-A
0.0395
0.0334
15.44
9.09
0.0474
0.0467
1.48
0.0416
0.0373
10.34
M4
0.0406
0.0470
15.76
-5.04
0.1497
0.1503
-0.40
0.0860
0.0851
1.05
Amberclean 527 L
Oak 15A
0.0261
0.0261
0.00
-2.15
2.95
0.0448
0.0434
3.13
0.0292
0.0320
-9.59
Oak Draw 941-A
0.0682
0.6630
2.79
10.52
0.0568
0.0521
8.27
0.0654
0.0520
20.49
M4
0.1237
0.1251
1.13
0.48
0.0780
0.0779
0.13
0.0489
0.0477
2.45
Success Rating:
Preliminary compatibility tests on substrate coupons encouraging for at least one cleaning chemistry. More in-depth laboratory testing necessary.
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