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To reevaluate products on supplied parts.
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.
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|
Success Rating:A follow up test, usually based on company input.
The five group of parts were sent back to be plated.