One cleaner was selected based on the results of the previous trial. The chemistry was diluted to 5% in 600 ml beakers using DI water and then heated to 130 F on a hot plate. The solution was then poured into a 250 glass bottle with three small round parts. The bottle was capped and placed in an ultrasonic tank filled with water at 130 F. Cleaning consisted of rotating the bottle from end to end and side to side throughout the five minutes of cleaning. Parts were removed from the bottle and rinsed in tap water at 120 F for 30 seconds and dried using a Master Appliance Corp, Hot-air gun model HG-301A at 500 F for one minute. After coupons returned to room temperature, final clean appearances were observed.
SUBSTRATE MATERIAL: Brass Parts
CONTAMINANTS: Buffing compound
CONTAMINATING PROCESS USED: Parts received contaminated