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Trial #29

Trial #29

To evaluate the effectiveness of SB-31 (t-Butyl Acetate 70% (CAS No: 540-88-5) and a mixture of (79% EEP + 7% Ethyl Lactate (CAS No: 97-64-3) + 14% t-Butyl Acetate 70% (CAS No: 540-88-5)) in removing lapping compound from stainless steel coupons as a potential replacement of TCE with a heated ultrasonic cleaning method.

2024

33

2

73

73

Coupon

10/22/2024

15.00

Ultrasonics

Tatyanna Moreland Junior

Stainless Steel

Greases

None

Air dry

Gravimetric

Three stainless steel coupons were used for each cleaner and soil combination, making a total of twelve coupons. The initial weights of each coupon were recorded. less than 0.1 g of each contaminant was added to the bottom third of the coupon with a swab, and the dirty weights of each coupon were then recorded. The coupons were then subjected to heated ultrasonics in the cleaner for 15 minutes at a temperature of 100 °F. After the coupons were cleaned, they were left to air dry overnight, and clean weights of each coupon were taken the following day.

Cleaner Soil Initial weight of content Final weight of content Percent Content Removed Average Percent Removal Average Cleaner Percent
SB-31 Dow Corning High Vacuum Grease 0.0852 0.0044 94.84 94.43 86.63
0.0894 0.006 93.29
0.06 0.0029 95.17
Apiezon Grease Type M 0.0207 0.0074 64.25 78.83
0.0462 0.0083 82.03
0.0306 0.003 90.20
MIXTURE Dow Corning High Vacuum Grease 0.0474 0.0218 54.01 78.87 83.72
0.0686 0.0069 89.94
0.0626 0.0046 92.65
Apiezon Grease Type M 0.0531 0.0056 89.45 88.58
0.0437 0.0055 87.41
0.0476 0.0053 88.87

SB-31 was effective for Dow Corning, and the mixture was effective for Apiezon. Another test would need to be done to verify the cleaner's effectiveness for the opposite contaminant.

No relation

Name Class Section
Document Evaluation #0 Evaluation 3
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