Trial #5
To evaluate successful cleaners on fifth contaminant.
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. Twelve preweighed coupons were coated with W.A. Wood #30 Lube Oil and reweighed. Three coupons were immersed into each solution and cleaned for five minutes. The coupons were rinsed in tap water at 120 F for 30 seconds and dried using a Master Appliance Corp, Hot-air gun model HG-301A at 500 F for 1 minute. Final "clean" weights were recorded and efficiencies were calculated.
All four were successful in removing the #30 Lube Oil in under the 2 minutes of ultrasonic cleaning. Three of the four needed only 30 seconds to remove the oil from the coupons. Daraclean was the only one that took longer, require just over 1 minute. The lubricant floated to the top of each solution, making filtration or other forms of separation easy.
The following table lists the calculated efficiencies for coupon cleaned.
| Cleaner
|
Coupon 1
|
Coupon 2
|
Coupon 3
|
Average
|
Std Dev
|
| Inproclean
|
98.41
|
99.62
|
99.18
|
99.07
|
0.61
|
| Daraclean
|
98.52
|
97.58
|
98.67
|
98.26
|
0.59
|
| Green Stuff
|
100.02
|
99.52
|
99.83
|
99.79
|
0.25
|
| Beyond
|
98.47
|
99.51
|
99.60
|
99.19
|
0.63
|
The four cleaners were all successful in removing over 98% of the lubricant in under one minute.
No relation