Trial #30
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.
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.
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.
SB-26, -29, and -32 were effective at removing the oil.
No relation