To determine cleaning efficiencies for various soil loadings.
Date Run:
12/09/1998
Experiment 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.
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