To identify a safer cleaning process. Currently using WD-40 and D-limonene.
Date Run:
06/15/2000
Experiment Procedure:
Eight cleaning chemistries were selected based on vendor supplied information and from searching the lab’s Effective Test Conditions Database. Dilutions were made using DI water in 600 ml beakers. Cleaning was performed at room temperature for 5 and 10 minutes. After each the first time interval, the ballasts were removed from the solution and wiped with a paper towel to determine if any cleaning had taken place. Parts were then submersed again into the solution. After the 10 minutes, the ballasts were rinsed in room temperature tap water for one minute and wiped dry. Observations were recorded for both cleaning times.
SUBSTRATE MATERIAL: Light Ballast (Fiberglass 50%, Al 10%, Cu 10%, Fe, 5%, Polypropar 25%
CONTAMINANTS: Tar/Asphalt CONTAMINATING PROCESS USED: Samples were received contaminated
Trial Results:
Three products showed signs of being able to dissolve the tar from the ballasts. The Harvest Gold solution was the best cleaner tested. Initially, this cleaner was an translucent amber color, but after the 10 minutes, the color turned opaque black. The V-50 cleaner was only moderately successful at the 20% concentration. At the full concentration, the V-50 was much more effective. Only one aqueous product, Super Neutral, was able to dissolve the tar. Table 2 lists the observations made during the two cleaning times.
Table 2. Cleaning Results
Cleaner #
5 minutes
10 minutes
1a
Started to dissolve
Okay
1b
Good
Good-excellent
2
Possible some removal
Little cleaning
3
No signs
Very little
4
No signs
Very little
5
No signs
Possible some removal
6
Possible some removal
Some-Okay
7
Good
Excellent
8
Possible some removal
Some-Okay
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
Conclusion:
Having identified three cleaners that were potentially capable of removing the tar from the supplied ballasts. These three products, Harvest Gold, V-50 and Super Neutral, will be tested under similar conditions with only the cleaning time being changed. The time will be increased to 30 minutes.
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