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 a heated ultrasonic cleaning method.
Date Run:
03/01/2024
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 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.
Trial Results:
Substrate
Cleaner
Coupon #
Initial wt of cont.
Final wt of cont.
%Cont Removed
Average % Removal
Copper
SB-2
1
0.0479
0.0522
-8.98
-93.62
2
0.0198
0.0673
-239.90
3
0.0272
0.0359
-31.99
SB-11
4
0.0345
0.0252
26.96
-72.06
6
0.0177
0.0326
-84.18
7
0.0173
0.0448
-158.96
SB-22
11
0.0244
0.0005
97.95
94.42
14
0.0153
0.0011
92.81
16
0.0187
0.0014
92.51
SB-23
17
0.0433
0.0009
97.92
73.48
21
0.0324
0.0007
97.84
31
0.0312
0.0235
24.68
Brass
SB-2
4
0.0352
0.0046
86.93
85.23
7
0.0176
0.0022
87.50
8
0.0224
0.0042
81.25
SB-11
12
0.0237
0.0218
8.02
-61.28
14
0.0135
0.0214
-58.52
16
0.0129
0.0301
-133.33
SB-22
18
0.0226
-0.0024
110.62
108.01
22
0.0246
-0.0033
113.41
25
0.0305
0.0000
100.00
SB-23
26
0.0255
-0.0036
114.12
106.73
28
0.0231
-0.0010
104.33
31
0.0515
-0.0009
101.75
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-2 seemed to be really effect on the brass coupons and testing should be replicated for consistency. 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.
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