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To evaluate successful products on third supplied soil
Nine cleaners were selected based on client request for vapor degreasing solvents. All products were used heated to 96 F on a hot plate in 250 ml beakers. The process utilized no water rinse and only used ambient air to dry the parts.
Twenty-seven preweighed steel coupons were coated with a varnish mix containing Cooper's Creek Chemicals, Cooper Black Tank Paint No 739 (64742-89-8, 8052-42-4, 108-88-3); Sherwin Williams Company, V74B2 Black Asphaltum coating (64742-89-8, 64742-88-7, 8052-42-4) using a hand held swab. The oil was then heated with a Master Appliance Heat gun at 300 F for 10 minutes. After cooling to room temperature, a second weighing was performed to determine the amount of soil that was added. Three coupons were cleaned in each solution for 5 minutes with minimal stir-bar agitation. After drying, coupons were weighed a final time to determine the cleaning efficiency of each product.
Five of the nine products removed over 97% of the varnish in five minutes of immersion cleaning. The table lists the amount of soil added, the amount remaining and the efficiency for each coupon.
|Cleaner||Initial wt||Final wt||% Removed|
|Ak 225||0.0825||0.0612||25.82 (Paint peeling)|
|Flux Remover C||0.1147||0.0865||24.59|
Success Rating:A follow up test, usually based on company input.
The five products that were successful at removing the varnish should be tested using vapor degreasing.