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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