Four products were selected based on the previous testing performed for the client. All products were heated to 130 F on a hot plate. Table 1 lists the products evaluated and the corresponding concentrations.
The cleaning solution/beaker was placed in a Crest 40 kHz ultrasonic tank model 4Ht 1014-6 filled with water heated to 130 F and degassed for five minutes.
Four parts, two of each supplied size, were placed into the suspended beaker and cleaned for five minutes. Rinsing used DI water at 130 F for 30 seconds. Drying was performed using a VWR Vacuum oven at 170 F for 20 minutes a vacuum of 30 in. Hg. At the end of dry parts were removed from the oven and each part was tapped ten times on a white paper towel to determine if any moisture was remaining. Observations were recorded for water and how clean parts looked.
SUBSTRATE MATERIAL: Brass parts-bellows
CONTAMINANTS: Kester Solder 1544 Rosin Flux-(Ethanol CAS#64-17-5;2-Butanol CAS#78-92-2*; Modified Rosin CAS#8050-09-7)
All the parts, except one, showed no signs of water after drying using the vacuum oven. One part that was cleaned with Envirosolutions had a small amount of water still left after drying. Cleanliness was determined to be about the same for the four products. For the small parts, Oakite Inproclean 4000 T appeared to be the cleanest looking part. For the larger bellows, Emkay Safety Wash CRC yielded the cleanest looking parts.