Trial Number 4

Seven products were selected from previous trial based on effectiveness. Three products were diluted to 10% using DI water and four were used at full strength in 600 ml beakers. Each solution was heated to 130 F in a Crest 40 kHz ultrasonic tanked filled with water. The solutions were degassed for 5 minutes.

Twenty-one preweighed coupons were coated with Jackonslea Grey Color 305 A (1344-28-1) by heating the buffing compound to facilitate transfer to the stainless-steel coupons. Once cooled, coupons were weighed again to determine the amount of buffing compound applied. Three coupons were cleaned in each solution for 1 minute using 40 kHz ultrasonic cleaning. Coupons were rinsed for 15 seconds in 120 F tap water and dried using compressed air at room temperature for 30 seconds. Coupons were weighed a third time to determine the amount of soil remaining and efficiencies were calculated for each coupon cleaned.

Five of the seven products removed over 90% of the buffing compound in one minute of ultrasonic cleaning. The SC Supersolve and Soy Gold 2000 removed under 75%. The table lists the amount of buffing compound applied, the amount remaining after cleaning and the efficiency for each coupon cleaned.

The five effective products will be tested on supplied dirty parts using ultrasonic cleaning.