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Trial Number 0
Trial Purpose:
To identify a replacement to Trichloroethylene in cleaning buffing compounds from brass fixtures.
Date Run:
03/27/2000
Experiment Procedure:
Eight cleaners were selected based on the lab’s database of effective testing and Industrial Cleaning Survey: Directory of Vendors 4th edition. Seven of the chemistries were diluted to 5% in 600 ml beakers using DI water. These seven were then heated to 130 F on a hot plate. The final cleaner was used at full strength and room temperature. Twenty-four preweighed brass coupons were contaminated with the buffing compound and weighed again. Three coupons were cleaned in one solution for five minutes using stir-bar agitation. Coupons were rinsed in tap water at 120 F for 30 seconds and dried using a Master Appliance Corp, Hot-air gun model HG-301A at 500 F for one minute. After coupons returned to room temperature, final clean weights were recorded and the percent efficiency was calculated.
US Polychem Polyspray 790 P was the only cleaner to remove all of the buffing compound from the brass coupons. Oakite Inproclean 3800 removed nearly 85% of the contaminant. WR Grace Daraclean 282 GF and International Products Micro 90 both had efficiencies over 70%. Table 1 lists all of the calculated cleaning efficiencies.
Table 1. Cleaning Efficiencies
Chemistry
Pressure Wash
Micro 90
Gillite 160 X
Inproclean
Dirtex
Polyspray
Daraclean
Engine Degreaser
Coupon 1
30.53
67.35
44.16
89.41
80.96
100.80
75.00
45.99
Coupon 2
31.24
87.73
40.21
90.48
71.83
100.47
71.92
76.39
Coupon 3
16.44
60.19
41.02
73.19
55.11
100.48
72.46
56.65
Average
26.07
71.76
41.80
84.36
69.30
100.58
73.13
59.68
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 four products that removed over 70% of the buffing compound will be further tested using the second supplied buffing compound. Additional testing will be performed on the supplied parts as well.
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