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Trial Number 30

Trial Purpose:

To evaluate the effectiveness of SB-11 (46% Ektapro EEP, 54% Benzyl Benzoate), SB-21 (13% Benzyl Benzoate, 87% Benzyl Alcohol), SB-26 (99% Ektapro EEP, 1% Ethyl Lactate), SB-29 (54% Benzyl Alcohol, 30% Ethyl Lactate, 16% Propylene Carbonate), and SB-32 (81% Ethyl Lactate, 19% Propylene Carbonate) in removing Caster Oil Laboratory Grade from stainless steel coupons as a replacement for TCE.

Date Run:

02/28/2025

Experiment Procedure:

Three stainless steel coupons were used for each cleaner, for a total of fifteen coupons. The initial weights of each coupon were recorded. The bottom fourth of every coupon was soiled by applying Caster Oil with a swab. The dirty weights of each coupon were then recorded. The coupons were then subjected to unheated ultrasonic in SB-11, SB-21, SB-26, SB-29, and SB-32 for 15 minutes. After the coupons were cleaned, they were left to air dry over the weekend. The next morning, the clean weights of each coupon were taken.

Trial Results:

Results
Cleaner Initial weight of cont. Final weight of cont. %Cont Removed Average % Removal
SB-11 0.0342 0.0345 -0.88 -13.87
0.0386 0.0435 -12.69
0.0346 0.0443 -28.03
SB-21 0.0181 0.0153 15.47 12.50
0.0256 0.0041 83.98
0.0184 0.0298 -61.96
SB-26 0.0398 0.0006 98.49 100.79
0.0320 -0.0015 104.69
0.0502 0.0004 99.20
SB-29 0.0362 -0.0003 100.83 100.56
0.0349 -0.0003 100.86
0.0272 0.0000 100.00
SB-32 0.0176 0.0000 100.00 98.66
0.0187 0.0000 100.00
0.0224 0.0009 95.98

Notes: The first 2 coupons did not dry, and the next 4 were partially dry. Could be related to the benzyl benzoate.

Success Rating:

Preliminary compatibility tests on substrate coupons encouraging for at least one cleaning chemistry. More in-depth laboratory testing necessary.

Conclusion:

SB-26, -29, and -32 were effective at removing the oil.

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