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To evaluate past products using ultrasonic cleaning on first supplied rust preventative
Nine products were selected for testing. Some of these products were chosen based on the previous trials and others based on vendor recommended information. Two products were diluted to 20% using DI water in 600 ml beakers. The other seven were used at full strength. Each product was immersed in a Branson 40 kHz ultrasonic tank and degassed for 5 minutes.
Twenty-seven preweighed steel coupons were coated with rust preventative VCI 325 using a hand held swab. Dirty weights were recorded. Three coupons were cleaned in each product for five minutes using ultrasonic agitation. No rinse was used and coupons were air dried at room temperature. Once dry, final weights were recorded and efficiencies calculated.
One of the nine products removed 81% of the rust preventative. The coupons cleaned with Smart Solve 605 all gained weight during cleaning. A follow up will be performed to determine why this may have happened. The table lists the amount of soil added, the amount remaining and the efficiency of each coupon cleaned.
|Cleaner||Initial wt||Final wt||% Removed|
|Smart Solve 605|
|Citrus Soy Solvent Cleaner & Degreaser|
|Bio T 300 B|
|SC Aircraft & Metal Cleaner|
Success Rating:Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
So far none of the selected products have matched the performance of the current cleaning product using no rinsing and no drying. Additional testing will be conducted to identify other alternatives that will more closely match performance while improving the EHS.