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To evaluate products at an elevated temperature and longer cleaning time.
The four products from the previous trial were diluted with DI water to vendor suggested concentration. The products were then heated to 160 F on a hot plate.
The pre-contaminated stainless steel coupons were cleaned three coupons per product for another 15 minutes (30 minutes total) using stir bar agitation. Cleaning was followed by a 15 second rinse in a tap water bath at 120 F and air blow off for 30 seconds at room temperature. Once dry, coupons were weighed a third time and efficiencies were calculated for each product tested.
All four products removed over 75% of the oil/starch mix after 30 minutes of cleaning at 160. Two of the products removed over 90%.he table below lists the amount of soil added, the amount remaining and the percent removed for each coupon cleaned.
|Cleaner||Initial wt||Final wt||% Removed|
|VPW SC 1000||0.1596||0.0380||76.19|
Success Rating:A follow up test, usually based on company input.
The increased time and temperature resulted in three products removing over 88% of the soil. The next phase of testing will be to compare these product directly to the current cleaner.