Ten preweighed coupons were coated with Castrol Inc. Braycote 601 perfluoropolyether grease, using a hand held swab. Coupons were reweighed. Five 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 immersed 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. The second set of five 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 Traditional system was more effective than the Flow-Matic equipment. The following table lists the results obtained during the evaluation.
Table 1. Cleaning Efficiencies
Process
Flow-Matic
Traditional
24.89
69.91
44.49
44.62
13.52
50.76
16.83
55.29
20.56
48.17
Average
24.06
53.75
Std Dev
12.18
9.84
Success Rating:
A follow up test, usually based on company input.
Conclusion:
The traditional ultrasonic method was more effective than the Flow-Matic system. Neither cleaner was successful in removing the grease from the stainless steel coupons.
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