To reevaluate selected products at longer cleaning times.
Date Run:
05/09/2006
Experiment Procedure:
Three products from the previous trial were selected for testing at longer temperatures. An additional product from the first contaminant was also included. Two of the products were diluted to 5% using DI water in 250 ml beakers and heated to 130 F on a hot plate. In addition two other products were used at full strength.
The contaminant consisted of two components from Westfield Coatings Company. The first, ARC Fast Dry Catalyst (123-86-4, 110-43-0, 108-65-6), was used at one part. The second, ARC Fast Dry (108-10-1) was used at two parts. The mixed paint/primer was applied to twelve 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 30 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.
Trial Results:
Two products removed over 95% of the paint. One of these, Citrus Burst 7, was used at full strength instead of the original 5% concentration. After cleaning and rinsing, the coupon still had a slight residue. The Solsafe 245 allowed the coating to be removed with some rubbing effort. The table below lists the amount of paint applied, the amount remaining and the effectiveness of the products.
Cleaner
Initial wt
Final wt
% Removed
Observations
Inproclean 4000 T
0.0859
0.0031
96.39
Easily wiped off
0.1436
0.0058
95.96
0.1885
0.0147
92.20
Solsafe 245
0.0803
0.0141
82.44
Rubbed off
0.1588
0.0259
83.69
0.1420
0.0443
68.80
Citrus Burst 7
0.1842
0.0024
98.70
Easily wiped off
0.1670
0.0120
92.81
0.2071
0.0205
90.10
Shopmaster RC
0.2788
0.2774
0.50
No removal
0.1950
0.1784
8.51
0.1133
0.1010
10.86
Success Rating:
A follow up test, usually based on company input.
Conclusion:
Two products, Inproclean 4000 T and Citrus Burst 7, were effective at removing this coating from the coupons after 30 minutes of ultrasonic cleaning and will be used on the supplied parts.
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