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Trial #13

Trial #13

To evaluate the effectiveness of SB-22 (79% Ektapro EEP 14% t-butyl acetate 7% propylene carbonate) and SB-24 (92% Ektapro EEP 8% t-butyl acetate) in removing J-2 oil from brass coupons as a potential replacement for TCE unheated immersion cleaning method.

2023

31

2

35

35

Coupon

09/05/2023

15.00

Immersion/Soak

Tatyanna Moreland Junior

Brass

Oil

None

Air dry

Gravimetric

Nine brass coupons were used for each cleaner being tested for a total of 18 coupons. The initial weights of each coupon were recorded. The bottom third of every coupon was soiled by applying the soil with a swab. The dirty weights of each coupon were then recorded. The coupons were then subjected unheated immersion in SB-22 and SB-24 with the stir bar at 240rpm for 15 mins. After the coupons were cleaned they were left to air dry over night. The next morning, the clean weights of each coupon were taken.

Cleaner Initial weight Final weight Percent Removed Average Percent Removed
SB-22 0.2659 0.0058 97.82 97.91
0.2795 0.0052 98.14
0.2686 0.0060 97.77
0.2370 0.0079 96.67 96.54
0.2456 0.0108 95.6
0.2179 0.0058 97.34
0.2734 0.0039 98.57 98.29
0.3094 0.0077 97.51
0.2698 0.0033 98.78
SB-24 0.3037 0.0035 98.85 98.15
0.3388 0.0060 98.22
0.2616 0.0069 97.36
0.3479 0.0061 98.25 98.01
0.3106 0.0060 98.07
0.2700 0.0062 97.70
0.2574 0.0046 98.21 97.74
0.3063 0.0057 98.14
0.1884 0.0059 96.87

Both cleaners proved to be as effective as TCE but the coupons immersed in SB-22 had a greasy residue after the 24 hour air dry.

No relation

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