To compare the effectiveness of alternative solvents to Trichloroethylene (TCE) when removing lubricating oils from aluminum alloy coupons.
Date Run:
12/26/2017
Experiment Procedure:
Pre-soiled aluminum parts (Oak 7a - CAS: 64742-53-6; 68909-65-9) and TCE cleaned parts were provided by Lytron. The contact angle of a TCE cleaned part was taken three times and then averaged. The average contact angle was used as a benchmark for the standard of cleanliness. This process was repeated with the pre-soiled parts to get a dirty contact angle. Parts were cleaned for five minutes using Opteon Sion and Tergo Metal Cleaner in a heated ultrasonic tank (95 F). Clean contact angles were taken three times per part and averaged for a final clean contact angle.
Trial Results:
The average contact angle for a TCE cleaned part was 93.97°. The TCE contact angle served as a benchmark for the standard of cleanliness.
Cleaner
Part #
Dirty Contact Angle
Average Dirty
Clean Contact Angle
Average Clean
Opteon Sion
1
44.86°
45.16°
79.26°
80.48°
50.14°
79.06°
40.49°
83.13°
Tergo Metal Cleaner
2
35.61°
43.88°
79.29°
86.34°
43.46°
90.44°
52.58°
89.28°
Success Rating:
Results suggest a scale-up feasible match for cleaning chemistry and equipment. Pilot plant study with actual parts recommended.
Conclusion:
The Tergo Metal Cleaner had the closest clean contact angle to the TCE cleaned contact angle. Tergo Metal Cleaner would be a more viable replacement for TCE based on the cleaning evaluation.
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