To evaluate the effectiveness of SB-33 (a D limonene and Dimethyl Glutarate mixture) and SB-31 (a Benzyl Alcohol and Ethyl Lactate miscture) in removing several production oils and greases from stainless steel coupons as a potential replacement for TCE unheated immersion cleaning method.
Date Run:
05/23/2023
Experiment Procedure:
Three stainless steel coupons were used for each of the two soils being tested against both cleaners for a total of 12 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-31 with the stir bar at 200rpm for 15 mins. The next morning, the clean weights of each coupon were taken
Soil
Use
CAS
Hocut 795
Metalworking Fluid
78-96-6, 101-83-7, 10043-35-3, 2634-33-5
RI 780
Corrosion Inhibitor
64742-88-7
Trial Results:
Cleaner
Soil
Initial wt of cont.
Final wt of cont.
%Cont Removed
% AVG
% Overall
SB-33
Hocut 795
0.0248
0.0053
78.63
73.09
79.60
0.0521
0.0051
90.21
0.0113
0.0056
50.44
RI 780
0.0205
0.0039
80.98
86.10
0.0169
0.0002
98.82
0.0186
0.0040
78.49
SB-31
Hocut 795
0.0728
0.0375
48.49
38.64
59.07
0.0352
0.0331
5.97
0.0799
0.0308
61.45
RI 780
0.0286
0.0045
84.27
79.49
0.0299
0.0033
88.96
0.0236
0.0082
65.25
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 Hocut 795 and RI 780 using unheated immersion method. SB-31 is an effective alternative to TCE in removing RI 780 using unheated immersion method.
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