To evaluate the effectiveness of SB-2, SB-11, SB-22, and SB-23 in removing Honing Oil from copper and brass coupons as a potential replacement for TCE with an unheated ultrasonic cleaning method.
Date Run:
02/26/2024
Experiment Procedure:
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 unheated ultrasonic 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.
Trial Results:
Substrate
Cleaner
Coupon #
Initial weight of cont.
Final weight of cont.
%Cont Removed
Average % Removal
Copper
SB-2
21
0.0429
0.0566
-31.93
-276.87
25
0.0167
0.0632
-278.44
27
0.0168
0.1042
-520.24
SB-11
15
0.0658
0.0537
18.39
-73.92
16
0.0271
0.0794
-192.99
39
0.0333
0.049
-47.15
SB-22
11
0.0688
0.0064
90.70
91.86
16
0.0275
0.0018
93.45
17
0.0257
0.0022
91.44
SB-23
2
0.0349
0.0041
88.25
89.90
29
0.0376
0.0048
87.23
40
0.0536
0.0031
94.22
Brass
SB-2
2
0.0488
0.0481
1.43
-36.45
5
0.0298
0.0369
-23.83
23
0.0284
0.0531
-86.97
SB-11
10
0.0463
0.0324
30.02
35.72
11
0.0274
0.0216
21.17
17
0.0536
0.0236
55.97
SB-22
9
0.0271
0.004
85.24
87.32
15
0.0565
0.0059
89.56
34
0.0444
0.0057
87.16
SB-23
14
0.0244
0.0013
94.67
78.95
18
0.0214
0.005
76.64
25
0.0148
0.0051
65.54
Success Rating:
Preliminary compatibility tests on substrate coupons encouraging for at least one cleaning chemistry. More in-depth laboratory testing necessary.
Conclusion:
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. Further testing can be done to create the ideal range of cleaning time and contaminants added.
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