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Trial Number 3

Trial Purpose:

To evaluate cleaning of supplied parts using previously successful cleaning products.

Date Run:

11/05/1999

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. Two parts were placed into the suspended beaker and cleaned for five minutes. Rinsing used DI water at 130 F for 30 seconds. Drying took place in an oven at 240 F for 15 minutes. Parts were analyzed for appearance after cooling to room temperature.
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)

Trial Results:

All four solutions were effective in removing bulk amounts of the flux. The surface of the bellows appeared to be brighter and free of contaminants. Table 2 lists the rankings of which cleaner made the parts look the best.

Table 2. Appearance After Cleaning

Cleaner Armakleen E 2002 Bio-T 300 B Inproclean 4000 T Safety Wash CRC
Ranking (1 Cleanest) 3 2 4 1

All four cleaning solutions had liquid remaining inside the parts after the 15 minutes of drying.  Bio-T 300 B had the least amount of solution based on tapping the parts on counter and observing the release of liquid.

Success Rating:

A follow up test, usually based on company input.

Conclusion:

During the next test, Armakleen and Inproclean will be used at 10%, while the other two will be used at the present strength.  Drying will be performed using a vacuum oven in an effort to eliminate the moisture.  The use of a centrifuge may also help with drying the inside of the parts

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