Five products that were found to be effective on all three soils were used at 120 F in a Crest Ultrasonic 40 KHz tank. Four products were used at 5% dilutions in 600 ml beakers and the fifth was used as received from the client in a 400 ml beaker. Each beaker was submersed in the tank filled with water at 120 F and degassed for 5 minutes.
The preweighed parts were contaminated with Castrol Rustilo 4163 (64742-46-7, 8002-74-2, 34590-94-8)and the weighed again. Five parts were cleaned in each product for five minutes with ultrasonic energy. The parts were rinsed in tap water at 120 F for 30 seconds and dried using air blow off at room temperature for 30 seconds. Parts were weighed a final time and efficiencies were calculated. Parts were then packaged and sent back to client to determine effectiveness.
Trial Results:
The five products appeared to remove all of the Rustilo. Only two parts with ball bearings had less than 95% removal with ultrasonics. The table below lists the initial soil weight, final weight and cleaning efficiency for each part cleaned.
Initial wt
Final wt
% Removed
Beyond 2004
0.4902
-0.0001
100.02
0.1483
0.0001
99.93
0.409
-0.0010
100.24
0.3925
0.0206
94.75 (ball bearing)
0.0397
-0.0016
104.03
Aeromaster
0.1285
0.0005
99.61
0.1798
0.0001
99.94
0.4602
0.0037
99.20
0.2213
0.0159
92.82 (ball bearing)
0.0811
-0.0004
100.49
M-Aero
0.1325
0.0001
99.92
0.1835
-0.0010
100.54
0.4464
-0.0006
100.13
2.1066
-0.0002
100.01
0.0113
-0.001
108.85
815 QR
0.1665
-0.0012
100.72
0.1416
-0.0005
100.35
0.3838
-0.0006
100.16
0.3373
-0.0005
100.15
0.0757
-0.0012
101.59
Alkalume
0.1018
0.0006
99.41
0.1244
-0.0012
100.96
0.3699
-0.0004
100.11
0.1326
-0.0010
100.75
0.0225
-0.0004
101.78
Success Rating:
A follow up test, usually based on company input.
Conclusion:
The five group of parts were sent back to be plated.
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