To clean supplied parts using the proposed cleaning protocol.
Date Run:
11/19/1999
Experiment Procedure:
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.
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.
Success Rating:
Results suggest a scale-up feasible match for cleaning chemistry and equipment. Pilot plant study with actual parts recommended.
Conclusion:
The cleaning system evaluated resulted in clean and dry parts for all of the cleaning solutions examined. Only one of the 16 parts had water remaining inside the bellows. Cleaning resulted in very similar effectiveness for all four cleaners.
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