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To evaluate successful alternatives on the second supplied paint formulation using ultrasonic cleaning.
The selected products were diluted to 5% using DI water in 250 ml beakers and heated to 130 F on a hot plate. The client supplied product was used at full strength.
The contaminant consisted of the second two part paint formulation from RPM Wood Finishes Group. The first was still the MS2664 Catalyst White (108-10-1, 28182-81-2, 822-06-0) and was used at three parts. The second, 9-6LP9258 White Primer Topcoat (13463-67-7, 110-43-0, 123-86-4, 108-10-1, 108-38-3) was used at one part. The mixed topcoat was applied to twenty-one preweighed steel coupons and allowed to dry. A second weight was recorded to determine the amount of paint applied.
Three painted coupons were immersed in a cleaning product and cleaned for 10 minutes using a 40 kHz ultrasonic tank. After the cleaning, coupons were rinsed in a tap water bath for 15 seconds at 120 F and air dried for 30 seconds at room temperature. The coupons were then rubbed with a gloved hand to determine how easily the paint could be removed. Once dry, the coupons were weighed a final time and removal efficiencies were calculated.
Only one product had trouble removing the topcoat mix using ultrasonic and wiping. The other products removed over 95% of paint. The table below lists the amount of paint applied, the amount remaining, the efficiencies and observations for each coupon cleaned.
|Cleaner||Initial wt||Final wt||% Removed|
|Aquavantage 3800 GD||0.1254||-0.0002||100.16|
|Inproclean 4000 T||0.0733||0.0013||98.23|
|A 2000 XS||0.0974||0.0003||99.69|
|Surface Cleanse 930||0.1302||0.0008||99.39|
Success Rating:A follow up test, usually based on company input.
The five alternatives will be tested on the removal of both the primer and topcoat paint mixtures layered on the steel coupons.