Trial #20
To evaluate the effectiveness of SB-2, SB-11, SB-22, and SB-23 in removing LMKT Lapping Compound from copper and brass coupons as a potential replacement for TCE with a heated ultrasonic cleaning method.
Three copper and brass coupons were used for each cleaner being tested, for a total of 12 coupons per cleaner. The initial weights of each coupon were recorded. The bottom third of every coupon was soiled by applying the contaminate with a swab. The dirty weights of each coupon were then recorded. The coupons were then subjected to heated ultrasonic at 140 degrees Fahrenheit in the cleaners for 15 minutes. After the coupons were cleaned, they were left to air-dry overnight. The next morning, the clean weights of each coupon were taken.
| Substrate
|
Cleaner
|
Coupon #
|
Initial weight of cont.
|
Final weight of cont.
|
%Cont Removed
|
Average % Removal
|
| Copper
|
SB-2
|
4
|
0.0259
|
0.0416
|
-60.62
|
-208.76
|
| 21
|
0.0184
|
0.0621
|
-237.50
|
| 39
|
0.0238
|
0.1019
|
-328.15
|
| SB-11
|
2
|
0.0371
|
0.0356
|
4.04
|
-19.66
|
| 3
|
0.0310
|
0.0508
|
-63.87
|
| 11
|
0.0352
|
0.0349
|
0.85
|
| SB-22
|
16
|
0.0285
|
0.0017
|
94.04
|
96.08
|
| 17
|
0.0312
|
0.0007
|
97.76
|
| 21
|
0.0311
|
0.0011
|
96.46
|
| SB-23
|
6
|
0.0361
|
0.0135
|
62.60
|
45.39
|
| 22
|
0.0361
|
0.0297
|
17.73
|
| 40
|
0.0326
|
0.0144
|
55.83
|
| Brass
|
SB-2
|
5
|
0.0175
|
0.0466
|
-166.29
|
-155.92
|
| 11
|
0.0264
|
0.0374
|
-41.67
|
| 16
|
0.0112
|
0.0403
|
-259.82
|
| SB-11
|
10
|
0.0226
|
0.021
|
7.08
|
-22.10
|
| 18
|
0.0193
|
0.0244
|
-26.42
|
| 25
|
0.0213
|
0.0313
|
-46.95
|
| SB-22
|
12
|
0.0155
|
-0.0055
|
135.48
|
121.77
|
| 15
|
0.0162
|
-0.0034
|
120.99
|
| 18
|
0.0305
|
-0.0027
|
108.85
|
| SB-23
|
7
|
0.0203
|
0.0087
|
57.14
|
21.71
|
| 28
|
0.0196
|
0.0192
|
2.04
|
| 31
|
0.0319
|
0.03
|
5.96
|
SB-2 and SB-11 did not dry properly overnight, and in some cases, their final contents were higher than their initials. SB-22 and SB-23 seemed like effective alternatives, but due to the "overcleaning" causing negative final weights, further testing can be done to determine the ideal range of cleaning time and contaminants added.
No relation