Trial Purpose:
To evaluate selected alternatives using ultrasonic cleaning.
Date Run:
05/02/2006Experiment Procedure:
The selected products were diluted to 5% using DI water in 250 ml beakers and heated to 130 F on a hot plate.
The contaminant again consisted of two components from RPM Wood Finishes Group. The first, MS2664 Catalyst White (108-10-1, 28182-81-2, 822-06-0) was used at three parts. The second, MS2669 Primer (108-10-1, 28182-81-2, 822-06-0) was used at one part. The mixed paint/primer was applied to eighteen 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.
Trial Results:
Three of the alternatives resulted in efficiencies over 90% when ultrasonics and wiping were used. Two other products removed over 80% of the paint. One product removed less than 60%. The table below lists the amount of paint applied, the amount remaining and the efficiency for each coupon cleaned.
| Cleaner | Initial wt | Final wt | % Removed |
| Solsafe 245 | 0.0698 | 0.0010 | 98.57 |
| 0.0319 | 0.0083 | 73.98 | |
| 0.0386 | 0.0094 | 75.65 | |
| Aquavantage 3800 GD | 0.0339 | 0.0031 | 90.86 |
| 0.0560 | 0.0207 | 63.04 | |
| 0.0673 | 0.0040 | 94.06 | |
| Shopmaster | 0.0423 | 0.0225 | 46.81 |
| 0.0762 | 0.0194 | 74.54 | |
| 0.0560 | 0.0245 | 56.25 | |
| Inproclean 4000 T | 0.0436 | 0.0048 | 88.99 |
| 0.0632 | 0.0004 | 99.37 | |
| 0.0383 | 0.0001 | 99.74 | |
| Beyond 2006 | 0.0400 | 0.0007 | 98.25 |
| 0.0744 | 0.0032 | 95.70 | |
| 0.0781 | 0.0021 | 97.31 | |
| A 2000 XS | 0.0607 | 0.0004 | 99.34 |
| 0.0371 | 0.0033 | 91.11 | |
| 0.0485 | 0.0009 | 98.14 | |
| Surface Cleanse 930 | 0.0473 | 0.0038 | 91.97 |
| 0.0474 | 0.0039 | 91.77 | |
| 0.0598 | 0.0078 | 86.96 |
Success Rating:
A follow up test, usually based on company input.Conclusion:
The six successful (above 80%) products will be used in the next trial using ultrasonics to remove the top coat paint formulation.
