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Trial #21

Trial #21

To evaluate the effectiveness of SB-2, SB-11, SB-22, and SB-23 in removing Slide Gel No. 7 from copper and brass coupons as a potential replacement for TCE with a heated ultrasonic cleaning method.

2024

31

1

50

50

Coupon

02/29/2024

2.00

No relation

Tatyanna Moreland Junior

Brass
Copper

Greases

None

Air dry

Gravimetric

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 wt of cont. Final wt of cont. %Cont Removed Average % Removal
Copper SB-2 16 0.0582 0.0583 -0.17 1.84
21 0.0616 0.0599 2.76
27 0.0582 0.0565 2.92
SB-11 2 0.0609 0.0547 10.18 35.64
29 0.0685 0.0263 61.61
39 0.0763 0.0495 35.12
SB-22 16 0.0836 0.0086 89.71 73.96
17 0.0431 0.0212 50.81
40 0.0354 0.0066 81.36
SB-23 11 0.08 0.0154 80.75 87.79
15 0.0677 0.008 88.18
25 0.0665 0.0037 94.44
Brass SB-2 11 0.036 0.0792 -120.00 -14.96
23 0.0857 0.0328 61.73
34 0.047 0.0407 13.40
SB-11 9 0.0472 0.0530 -12.29 33.10
15 0.0743 0.0430 42.13
18 0.0380 0.0116 69.47
SB-22 2 0.0400 0.0118 70.50 43.75
5 0.0784 0.0270 65.56
14 0.0332 0.0348 -4.82
SB-23 10 0.0708 0.0319 54.94 18.38
17 0.0822 0.0522 36.50
25 0.0270 0.0368 -36.30

Overall, the cleaners did not do an effective job removing the contaminants; all coupons were wet with cleaner and/or contaminant after air drying. Copper coupons that were cleaned with SB-22 and SB-23 were less wet but the latter seemed to be more effective.

No relation

Name Class Section
Document Evaluation #0 Evaluation 3
Document Evaluation #1 Evaluation 3
Document Evaluation #2 Evaluation 3
Document Evaluation #3 Evaluation 3
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