To identify and compare alternatives to current cleaning solution
Date Run:
08/01/2002
Experiment Procedure:
Nine alkaline aqueous products were selected from the laboratories database of effective cleaners. Selections were made based on successful cleaning of buffing compounds and compatibility with brass and copper. An additional solution was supplied by the client. Each solution was diluted to 5% using DI water in 600 ml beakers. The dilutions were heated to 130 F on a hot plate. Thirty preweighed coupons were coated with Jackson Lea Learok 7-S-3 Buffing compound (102-71-6, 14808-60-7, 1317-95-9). The buffing compound was applied by first heating it with a hot air gun and rubbing the coupons with the melted contaminant. Coupons were allowed to cool to room temperature and then weighed again. Three coupons were cleaned in each solution for 5 minutes using stir-bar agitation. Following the cleaning, coupons were rinsed with a DI water bath for 30 seconds at room temperature and dried using a Master Appliance Heat Gun at 300 F for 15 seconds. Coupons were again allowed to cool to room temperature and then weighed a final time. Cleaning efficiencies were calculated and recorded.
Trial Results:
During the initial soak cleaning, many of the produces were dissolving the buffing compound. Despite this observation, when the coupons were weighed, efficiencies were very low. It was noted that the buffing compound was only loosely attached the coupons. When the coupons were wiped with a single pass using a paper towel, efficiencies were vastly improved. The following table lists the efficiencies calculated for both the initial immersion test and the wipe analysis.
Cleaner
Immersion
with Wipe
Permag S-4
3.70
96.61
815 GD
-4.82
76.17
Shopmaster LpH
6.15
10.66
Micro 90
-3.37
99.43
ND 17
18.26
93.35
Inproclean 3800
31.73
90.16
Dirtex
12.95
82.39
Simple GreenD
3.76
30.65
Polychem Spray 790P
28.09
74.30
Daraclean 282 GF
30.28
99.12
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
Conclusion:
The eight successful wipe cleaners will be evaluated using ultrasonics.
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