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Trial Number 1

Trial Purpose:

2nd contaminant cleaning

Date Run:

04/04/2002

Experiment Procedure:

Eighteen preweighed coupons were coated with The Valvoline Co, Tectyl 505 (8052-41-3) rust preventative, using a hand held swab. Coupons were reweighed. Nine coupons were clipped to wire racks and immersed into the Flow-Matic machine and cleaned for 1 minutes using ultrasonics at 92 F, removed and rinsed in a tap water spray and re-mmersed into the ultrasonics for an additional 1 minute followed by a second 5 second rinse. The nine coupons were then dried using an air knife for 15 seconds and then using a Master Appliance heat gun at 500 F for 15 seconds. The second set of nine coupons followed the same cleaning cycle except they were hung on a wire stand and immersed into a Crest 40 kHz ultrasonic tank.

Trial Results:

Comparison of the two processes revealed that the Flow-Matic system was more effective than the traditional ultrasonic equipment. The following table lists the results obtained during the evaluation.

Table 1. Cleaning Efficiencies

Process Flow-Matic Traditional
  99.93 99.46
  99.93 98.41
  98.97 98.90
  99.53 98.94
  99.95 96.30
  100.04 97.40
  99.24 97.45
  100.12 98.71
  100.06 99.51
Average 99.75 98.34
Std Dev 0.41 1.08

Success Rating:

A follow up test, usually based on company input.

Conclusion:

The Flow-Matic system was more effective than the traditional ultrasonic method.

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