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Trial Number 2

Trial Purpose:

To evaluate five paint cleaner products for manual removal of paint from stainless steel coupons.

Date Run:

02/24/2015

Experiment Procedure:

Fifteen pre-weighted coupons were double coated with the supplied paint. Once dried, a second weight was recorded to determine the amount of paint added to the coupon. In groups of three, the coupons were then submerged in five beakers with 120 ml of different liquid paint cleaners (strippers). Three coupons were submerged in each beaker for 5 minutes and cleaned with a plastic scrapper. Each coupon was scrapped slowly three times. The coupons were then rated for the paint removal at that point. Then, they were submerged again in the beaker. This process was repeated every 5 minutes for a total time of 30 minutes.  All these products were used at full strength and room temperature, except for D-Zolve 917, which was used at a concentration of 10% diluted in water. The coupons were overnight dried and a third weight was recorded to determine the amount of paint was removed and efficiency was calculated.

Visual Performance ranking:
1) Excellent Total Removal
2) Good Removal
3) Fair Removal
4) Soften Paint
5) No Removal

Trial Results:

Cleaner 5 min 10 min 15 min 20 min 25 min 30 min
Zemosol 4 4 2 1 1 1
Green Strip #10 3 2 2 2 1 1
D Zolve 917 5 5 5 5 5 5
Sky Kleen 5 4 4 4 3 3
Graffiti Remover 4 3 3 3 3 3

Success Rating:

Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.

Conclusion:

Zemazol Avoc presented the higher efficiency by separating the paint from the coupon and Chimista # 10 by dissolving it; both begun to work by the first five minutes of the test. Graffiti Remover and Sky kleen both worked by dissolving the paint, beginning their efficiency close to the 20 minute marker during the test. D-Zolve 917 did not remove the paint after the experiment concluded.

Future testing may require increasing the cleaner temperature to analyze the impact on efficiency and also the use of a napkin to remove the excess of cleaner before it get mixed with the paint prior the overnight drying period.

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