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To evaluate products on second supplied contaminant using ultrasonic cleaning
The same six products from the previous trial were used at the same dilutions and time (5 min). Each beaker was immersed into a Crest 40 kHz ultrasonic tank filled with water heated to 115 F. The products were degassed for 5 minutes.
Eighteen preweighed 6061 aluminum coupons were again contaminated with Valenite Inc. Valcool VNT 910 (102-71-6, 141-43-5, 26896-20-8, 112-05-0) using a swab. A second weighing was performed to determine the amount of soil added. Three coupons were cleaned in each product for 5 minutes with ultrasonics. Coupons were again rinsed in water at 120 F for 15 seconds and dried with air blow off at room temperature for 30 seconds. Once dry, final weights were recorded and efficiencies were calculated.
All six products removed over 89% of the coolant within 5 minutes of cleaning. Five of the six removed over 96%. The client's current cleaner had the highest cleaning efficiency followed closely by Brulin 815 GD. The table below lists the amount of soil added, the amount remaining and the efficiency for each coupon cleaned.
|Cleaner||Initial wt||Final wt||% Removed|
|Formula 815 GD||0.0216||0.0000||100.00|
|Surface Cleanse 930||0.0651||0.0012||98.16|
|Valtron SP 2275||0.0963||0.0002||99.79|
Success Rating:A follow up test, usually based on company input.
Ultrasonic cleaning of both contaminants were effective with many of the aqueous based products in under 5 minutes of cleaning. Supplied parts will be cleaned in the top two cleaning products.