Trial Purpose:
To determine cleaning efficiencies for various soil loadings.
Date Run:
12/09/1998Experiment Procedure:
Preweighed coupons were covered with the D-Greeze 500 spent cleaning solution and dried under an IR heat lamp. After the name plate coupons cooled, a second weighing was performed. Eight 300 mL Pyrex beakers were filled with a Soy Gold and D-Greeze mixture. The beakers were heated to 130 F on a hot plate. Two coupons were cleaned in each solution mixture for 2 minutes using stir bar agitation. Coupons were rinsed under a hot water tap for 30 seconds and then air dried. Final weights were recorded and cleaning efficiencies were calculated. The concentrations of the Soy Gold/D-Greeze solutions used were (%):
0.0, 2.5, 5.0, 7.5, 10.0, 20.0, 30.0, 50.0
SUBSTRATE MATERIAL: Aluminum Name Plate
CONTAMINANTS: Dirty cleaning solution, Solvent Kleen D-Greeze 500 w/ residual paint chips and pumice sludge
CONTAMINATING PROCESS USED: Added known volume to Cleaning Solution. Applied contaminant to using hand held swab.
Trial Results:
All of the cleaning solutions were determined to be effective in removing all of the applied contaminant. Table 1 list the individual cleaning efficiencies for each soil loading mixture.
Table 1. Soil Loading Cleaning Efficiency
| Soil Load | 0% | 2.50% | 5% | 7.50% | 10% | 20% | 30% | 50% |
| 105.9 | 84.1 | 95.8 | 97.4 | 100.7 | 102.0 | 101.5 | 101.3 | |
| 100.6 | 94.2 | 99.0 | 89.9 | 100.7 | 101.1 | 100.7 | 101.0 | |
| Average | 103.3 | 89.2 | 97.4 | 93.9 | 100.7 | 101.7 | 101.3 | 101.4 |
| Std Dev | 3.8 | 7.1 | 2.3 | 5.3 | 0.0 | 0.6 | 0.6 | 0.2 |
Success Rating:
A cleanliness study, addressing only various analytical techniques.Conclusion:
The cleaning efficiencies were all 90% or better. The higher the soil loading, the more effective the cleaning became. This could be do to the make up of the contaminant and the diluted cleaning solution (both contain D-Greeze 500). The D-Greeze in the cleaning solution was helping in removing the D-Greeze from the coupons.
