To evaluate successful aqueous products on the fourth supplied soil.
Date Run:
06/20/2008
Experiment Procedure:
The top six products were selected from the previous lab trial. Each product was diluted to 5% using DI water in 600 ml glass beakers. Solutions were heated to 130 F on immersed in a heat bath in a Branson 40 kHz ultrasonic tank. Products were degassed for five minutes.
Eighteen preweighed steel coupons were coated with the Dow Corning G-n metal assembly spray lubricant by spraying the contaminant onto the surface. Coupons were weighed a second time to determine the amount of soil added. Three coupons were immersed into each product and cleaned for 5 minutes using ultrasonic agitation. Following cleaning, coupons were rinsed for 15 seconds in tap water at 120 F and dried using air blow off for 30 seconds at room temperature. Final weights were recorded, and efficiencies were calculated.
Trial Results:
Four products removed over 80% of the lubricant, one of which removed all of the contaminant. The Micro 90 product had efficiency over 100%. Upon review of the coupons, do visual damage was apparent and the excessive cleaning may have been due to the coupons not being completely cleaned prior to the baseline initial weights. Only one product was ineffective, removing just a third of the contaminant. The table lists the amount of lubricant added, the amount remaining and the efficiency for each coupon cleaned.
Cleaner
Initial wt
Final wt
% Removed
Micro 90
0.1011
0.0016
98.42
0.0799
-0.0060
107.51
0.1403
-0.0056
103.99
Polyspray Jet 790 XS
0.1608
-0.0051
103.17
0.1047
0.0037
96.47
0.2180
0.1122
48.53
Luminox
0.2134
0.1242
41.80
0.1216
0.1005
17.35
0.0724
0.0428
40.88
Daraclean 282GF
0.0352
0.0009
97.44
0.0294
0.0041
86.05
0.0966
0.0143
85.20
Metalnox M 6310
0.0809
0.0191
76.39
0.0913
0.0193
78.86
0.0850
0.0110
87.06
Armakleen M Aero
0.1055
0.0198
81.23
0.0686
0.0104
84.84
0.0893
0.0235
73.68
Success Rating:
Results suggest a scale-up feasible match for cleaning chemistry and equipment. Pilot plant study with actual parts recommended.
Conclusion:
Several of the products were found to remove most of the lubricant within the short cleaning time. Overall results for three of the soils yielded Mirco 90, Daraclean 282 GF, Polyspray Jet 790 xs and Armakleen M Aero as the top four products with averages above 90%. These products will be evaluated on supplied parts.
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