To evaluate the effectiveness of SB-33 (a D limonene and Dimethyl Glutarate mixture) and SB-10 (a t-butyl acetate and Benzyl benzoate mixture) in removing several production oils and greases from stainless steel coupons as a potential replacement for TCE unheated immersion cleaning method.
Date Run:
04/19/2023
Experiment Procedure:
Three stainless steel coupons were used for each of the five soils being tested for a total of 15 coupons. The initial weights of each coupon were recorded. The bottom third of every coupon was soiled by applying the corresponding soil with a swab. The dirty weights of each coupon were then recorded. The coupons were then subjected unheated immersion in SB-33 and SB-10 with the stir bar at 200rpm for 15 mins. After the coupons were cleaned, they dried with a heat gun for about 2 minutes each. The next morning, the clean weights of each coupon were taken
Soil
Use
CAS
Milform OAK 7a International
Stamping and drawing fluid
64742-53-6 / 68909-65-9
Milform Oak 529
Evaporative lubricant
68551-17-7 / 123-95-5 / 127087-87-0
Milform Oak 15a
Metalworking oil
64742-44-5 / 64742-52-5 / 64742-55-8
Milform Oak 15c
Metalworking oil
64742-52-5 / 64742-53-6
M4
Trial Results:
Cleaner
Soil
Initial wt of cont.
Final wt of cont.
%Cont Removed
% AVG
% Overall
SB-33
Oak 7a international
0.0716
0.0041
94.27
86.83
83.01
0.0736
0.0049
93.34
0.1441
0.0391
72.87
M4
0.5475
0.0036
99.34
99.15
0.4997
0.0000
100.00
0.4923
0.0093
98.11
Oak 15c
0.0693
0.0248
64.21
86.85
0.1046
0.0027
97.42
0.1296
0.0014
98.92
Oak 15a
0.2135
0.0038
98.22
97.85
0.1782
0.0057
96.80
0.1484
0.0022
98.52
Oak 529
0.0047
0.0027
42.55
44.38
0.0213
0.0128
39.91
0.0144
0.0071
50.69
SB-10
Oak 7a international
0.1011
0.0961
4.95
9.41
34.83
0.1007
0.0981
2.58
0.1044
0.0828
20.69
M4
0.4988
0.1493
70.07
79.38
0.6742
0.1689
74.95
0.4094
0.0281
93.14
Oak 15c
0.0991
0.0974
1.72
22.60
0.1588
0.1070
32.62
0.1446
0.0962
33.47
Oak 15a
0.1992
0.0927
53.46
43.72
0.1788
0.1127
36.97
0.1505
0.0892
40.73
Oak 529
0.0287
0.0187
34.84
19.05
0.0314
0.0258
17.83
0.0269
0.0257
4.46
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
Conclusion:
SB-33 is an effective alternative to TCE in removing all of the soils except for Oak 529 using unheated immersion. SB-10 is not an effective cleaner in removing any of the soils, except for M4, using unheated immersion.
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