The following experimental procedure followed TURI’s cleaning standard for grease soil removal with the manual SLW machine.
Soiling Process:
A set of pre-weighed copper coupons were soiled with 0.5 grams of multi-purpose super white grease soil using a hand held swab. Another set of pre-weighed copper coupons were soiled with 0.5 grams of wax blend using a hand held swab. The wax blend is made from a blend of polybutene oil 50%, and BE Square 50%. After soiling the coupons with the respective soils, each coupon was re-weighed for the amount of contaminants added.
Cleaning Process:
Three copper coupons soiled with the same soil were placed into a Gardner Straight Line Washability unit. A Wypall X60 reinforced wipe was attached to the cleaning sled and soaked with 1 spray of cleaning solution. Each coupon was sprayed once with the same cleaning solution. Each cleaning solution was used at full concentration. The solution was allowed to penetrate/contact for 30 seconds followed by cleaning in the SLW unit for 20 cycles (~33 seconds).
Efficacy Rating Process:
After cleaning, the coupons were left to sit at room temperature for 1 hour before re-weighing the coupons for the amount of contaminants removed. The efficacy of a cleaner is measured by the amount of contaminated removed using gravimetric analysis. As a general rule of the lab, an effective cleaner is observed to have an efficacy rating of 85% or higher.
Chemistries Evaluated: Quicksolv DMC; Acetone
The sample cleaner (Quicksolv DMC) was observed to be just as effective as the comparative cleaner (acetone) when removing multi-purpose super white grease soil from copper coupons: with respective efficacy ratings of: 90.56% and 86.77%. Similarly, the sample cleaner (Quicksolv DMC) was observed to be just as effective as the comparative cleaner (acetone) when removing wax blend soil from copper coupons: with respective efficacy ratings of 19.33% as compared to 14.55%.
Table pertaining to the amount of contaminant added and removed using a gravimetric scale, to measure the efficacy of the respective cleaners.
| Initial wt. of Cont. (g)
|
Final wt. of Cont. (g)
|
Cont. Removed (%)
|
Avg. Cont. Removed (%)
|
Avg. Efficacy (%)
|
| 0.4965
|
0.0288
|
94.2
|
90.56
|
54.95 Quicksolv DMC
|
| 0.5008
|
0.0276
|
94.49
|
| 0.4955
|
0.0843
|
82.99
|
| 0.501
|
0.3967
|
20.82
|
19.67
|
| 0.4992
|
0.3958
|
20.71
|
| 0.4733
|
0.3906
|
17.47
|
| 0.5166
|
0.3756
|
27.29
|
19
|
| 0.4973
|
0.3934
|
20.89
|
| 0.5189
|
0.4732
|
8.81
|
| 0.4982
|
0.0562
|
88.72
|
86.77
|
50.66 Acetone
|
| 0.4982
|
0.0643
|
87.09
|
| 0.5036
|
0.0781
|
84.49
|
| 0.5041
|
0.4684
|
7.08
|
14.87
|
| 0.4987
|
0.3552
|
28.77
|
| 0.4932
|
0.4501
|
8.74
|
| 0.5051
|
0.4879
|
3.41
|
14.24
|
| 0.5056
|
0.3278
|
35.17
|
| 0.4983
|
0.4776
|
4.15
|
*Note that there are two trials for cleaning the wax blend soil because the first trial was observed to have a high standard deviation. Therefore, a second trial was conducted to verify the results of the first trial. There is no significant difference between the first and second trial runs.