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To evaluate successful cleaners on sixth 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 Precision Finishing Inc, Chemtrol 229 and reweighed. Three coupons were immersed into each solution and cleaned for two 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.
Each product removed over 99% of the Chemtrol 229 from the steel coupons in less than 30 seconds. The table below lists the effectiveness for each solution.
|Cleaner||Coupon 1||Coupon 2||Coupon 3||Average||Std Dev|
Success Rating:Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
All four were successful in removing the burnishing compound from the coupons using ultrasonic energy.