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Trial Number 1

Trial Purpose:

To evaluate selected alternatives using ultrasonic cleaning.

Date Run:

05/02/2006

Experiment 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.

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