Trial #0
To identify a replacement to Trichloroethylene in cleaning buffing compounds from brass fixtures.
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.
SUBSTRATE MATERIAL: Brass Coupons
CONTAMINANTS: Jackson Lea, Antique Buffing Compound LM-12 (CAS#s:9000-70-8,1344-28-1,409-21-2,1309-37-1)
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
|
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.
No relation