To evaluate partially successful products with ultrasonic cleaning
Date Run:
02/23/2004
Experiment Procedure:
The two products from the previous trial were heated to 110 F on a hot plate. Six preweighed ceramic coupons were coated with client supplied lacquer, Microshield Stop Off (78-93-3, 108-88-3, 109-99-9, 75-56-9, 842-07-9). The contaminant was applied directly to the coupon surface using a swab. The coupons were allowed to dry at room temperature before weighing a second time. Three coupons were cleaned in each solution for 10 minute intervals, up to 30 minutes, using a Branson 3510 ultrasonic tank. Beakers were suspended in the tank filled with water and degassed for 5 minutes. Coupons were rinsed in tap water for 15 seconds at 120 F, followed by air blow off at room temperature. Once dry, coupons were weighed a final time and efficiencies for each cleaner were calculated.
Trial Results:
Both products were successful in removing over 94% of the Stop Off within 10 minutes. The Ink Zapper had a small amount of residue remaining after rinsing. The Metabolix product had no residue after rinsing. The table lists the amount of Stop Off that was added, how much remained after cleaning and the efficiency for each coupon.
Cleaner
Initial wt
Final wt
% Removed
E3HB Ultrasonics
0.0435
0.0006
98.62
0.0483
0.0000
100.00
0.0932
-0.0002
100.21
Ink Zapper Ultrasonics
0.0647
0.0033
94.90
0.0536
0.0036
93.28
0.0917
0.0042
95.42
Success Rating:
A follow up test, usually based on company input.
Conclusion:
Both products were successful with the addition of ultrasonic energy.
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