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To find a cleaning solution that will work in a high pressure spray wash system for cleaning tanker trucks.
Seven cleaners were selected on vendor supplied information and from the lab’s Effective Test Conditions Database of past trials. The chemistries were then diluted to 10% (except one) by volume using DI water in 1000 mL Pyrex beakers.
Twenty-one preweighed coupons were contaminated and weighed again. Three coupons were cleaned in each cleaner for ten minutes using stir-bar agitation. Coupons were rinsed in a tap water bath for 30 seconds at 120 F and then allowed to air dry for two hours. Final weights were recorded, and cleaning efficiencies calculated.
SUBSTRATE MATERIAL: Stainless Steel coupons (316 B-80)
CONTAMINANTS: Solutia Gelva Multipolymer Resin Solution 2895 (CAS#s: 50862-46-9; 141-78-6; 142-82-5; 67-63-0; 64-17-5; 108-05-4)
CONTAMINATING PROCESS USED: Coupons were coated with contaminant with a handheld swab. Coupons were then allowed to dry for one hour.
During the cleaning cycle, none of the cleaners appeared to work very well at the dilutions used. After calculating the cleaning efficiencies, very little of the contaminant was removed. Table 2 lists the calculated efficiencies for each cleaner.
|Table 2. Cleaning Efficiencies|
|AW Chesterton||Buckeye||Envirosolutions||Oakite||T-Square||AG Environmental||Savogran|
Success Rating:Test incomplete or inconclusive.
The three products with the efficiencies around 10 (AW Chesterton, Envirosolutions and Savogran) and the one product with the negative removal (T-Square) will all be retested at full strength.