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To evaluate aqueous based cleaners for the removal of first buffing compound from brass coupons.
Eight products were selected from the lab's database of test results based on supplied information from the client. Each product was used at 5% diluted with DI water and heated to 130 F on a hot plate. A 600 ml beaker was filled with each product and placed on a stir plate.
Twenty-four preweighed 260 Brass coupons were coated with the Mosher Company Inc Moco Steel Cut #2318 (68425-50-2, 555-43-1, 57-11-4, 26635-92-7, 1344-28-1) buffing compound. The compound was applied by heating the coupons and the buffing compound with a Master Appliance Heat Gun. The hot buffing compound was rubbed across the surface. Coupons were allowed to cool to room temperature and weighed a second time to determine the amount of contaminant applied. Three coupons were cleaned in each product for 5 minutes using stir-bar agitation. After cleaning, the parts were rinsed for 15 seconds in 120 F tap water bath and then dried for 30 seconds using dry, compressed air at room temperature. Once dry, final weights were recorded and efficiencies were calculated for each product.
Four products were successful in removing over 80% of the buffing compound after 5 minutes of soaking. Three products remover just under 70%. One product removed less than half of the buffing compound. The aqueous based cleaners were more effective than the drop in solvents investigated in the first trial. The first table below lists the amount of soil applied, the amount remaining and the efficiency for each coupon cleaned. The second tables lists the results for the drop-in solvents tested.
|Cleaner||Initial wt||Final wt||% Removed|
|Texolite 1734 XL||0.0749||0.0001||99.87|
|Polyspray Jet 790 P||0.1559||0.0542||65.23|
Success Rating:A follow up test, usually based on company input.
The four effective aqueous products will be tested on the second buffing compound under similar conditions.