Trial #5
To evaluate the effectiveness of SB-16 (a FAME + Methyl Lactate mixture) in removing several production oils and greases from stainless steel coupons as a potential replacement for TCE using heated ultrasonics cleaning method.
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 to heated ultrasonics cleaning in a solution of Fatty Acid Methyl Ester 93% + Ethyl Lactate 7% for 15 minutes at 130 F. 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
|
|
|
| Solvent
|
Substrate
|
Soil
|
Initial wt of cont.
|
Final wt of cont.
|
%Cont Removed
|
% AVG
|
% Overall
|
| Fatty Acid methyl ester 93% + Ethyl lactate 7%
|
Stainless Steel
|
Oak 7a international
|
0.0753
|
0.0308
|
59.10
|
67.74
|
72.69
|
| Oak 7a international
|
0.0635
|
0.0202
|
68.19
|
| Oak 7a international
|
0.0781
|
0.0188
|
75.93
|
| M4
|
0.1500
|
0.0254
|
83.07
|
82.94
|
| M4
|
0.2122
|
0.0416
|
80.40
|
| M4
|
0.1380
|
0.0202
|
85.36
|
| Oak 15C
|
0.0709
|
0.0118
|
83.35
|
80.84
|
| Oak 15C
|
0.0775
|
0.0154
|
80.13
|
| Oak 15C
|
0.1068
|
0.0224
|
79.03
|
| Oak 15A
|
0.1911
|
0.0158
|
91.73
|
87.13
|
| Oak 15A
|
0.1891
|
0.0244
|
87.10
|
| Oak 15A
|
0.1571
|
0.0274
|
82.56
|
| Oak 529
|
0.0273
|
0.0152
|
44.32
|
44.80
|
| Oak 529
|
0.0309
|
0.0231
|
25.24
|
| Oak 529
|
0.0330
|
0.0116
|
64.85
|
When the coupons were dried with a heat gun for 2 minutes each, a white vapor was emitted in the fume hood.
SB-16 (Fatty Acid Methyl Ester 93% + Ethyl Lactate 7%) is an effective cleaner for soils M4, Oak 15C, and Oak 15a if a drying step is feasible. It is not an effective cleaner for soils Oak 7a international and Oak 529.
No relation