To evaluate products at higher temperature and longer time for heavily solid coupon.
Date Run:
12/17/2004
Experiment Procedure:
Three products were diluted with DI water to vendor suggested concentration. The products were then heated to 200 F on a hot plate. The pre-contaminated stainless steel coupons were weighed to determine the amount of oil/starch was applied during the week long process. One coupon was cleaned in each product for 60 minutes using no agitation. Cleaning was followed by a 15 second rinse in a tap water bath at 120 F and air blow off for 30 seconds at room temperature. Once dry, coupons were weighed a third time and efficiencies were calculated for each product tested.
Trial Results:
All three products removed over 95% of the contaminant mix from the coupons within an hour of soaking at 200 F. Even though the Liquid Chembrite coupon looked the cleanest, the other two products had overall higher cleaning efficiencies. There was no improvement in soaking the coupon in the 2.5% dilution of the Organic Cleaner/ Degreaser. The table lists the amount of contamination was present initially, the amount remaining after cleaning and the effectiveness of each cleaner.
Cleaner
Initial wt
Final wt
% Removed
Liquid Chembrite
0.3564
0.0118
96.69
Organic Cleaner/Degreaser
0.9208
0.0234
97.46
VPW SC 1000
1.1592
0.022
98.1
Organic C/D 2.5%
0.2337
0.2229
4.62
(increases in efficiency from previous trial.)
Success Rating:
A follow up test, usually based on company input.
Conclusion:
Additional testing can be conducted for two week soiling period. Cleaning would be done at 200 F for at least one hour.
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