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Trial Number 9

Client Number 154

Project Number 1

Trial Purpose:

To clean supplied parts with the successful cleaners

Date Run:

06/20/2001

Experiment Procedure:

The four successful cleaners from the previous trial were again diluted to 5% using DI water in 600 ml beakers and placed in a Crest 40 kHz ultrasonic tank model 4Ht 1014-6. Solutions were heated to 130 F. From the supplied parts, two different types of parts were selected for each cleaning solution. The parts were observed under black light as a way to determine the level of contamination present. The parts were cleaned for 2 minutes with ultrasonic energy, rinsed in tap water at 120 F for 30 seconds and dried using a heat gun at 500 F for 1 minute. Final observations were made and parts were packaged up to be sent to client.

Trial Results:

All four cleaners appeared to clean the supplied parts. The following table shows which parts were cleaned in which solution and any notable observations made during the cleaning trial. Not all parts fluoresced under the black light.

Cleaner Part Observations
1 TCN fluoresced under black light prior to cleaning, but not after, part looked clean
1 Oldham (AL) part looked clean
2 Collar before splitting fluoresced under black light prior to cleaning,
2 Flexible coupling (SS) parts looked clean
3 Flexible coupling brown oil surfacing during cleaning, part looked clean
3 Collars brown oil surfacing during cleaning, part looked clean
4 TCN Blackened solution became cloudy, parts looked clean
4 1/2 rigged collar rusty to start, cleaning removed a lot of rust, solution became cloudy, part looked

Success Rating:

Results suggest a scale-up feasible match for cleaning chemistry and equipment. Pilot plant study with actual parts recommended.

Conclusion:

The cleaned parts have been packaged to be returned to client for further inspection. All four solutions improved the cleanliness of the parts. The Green Stuff and Beyond 2001 both showed the most signs of cleaning. This could have been because the parts the solutions were cleaning were dirtier than the other parts cleaned in the other two solutions.

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