Trial Purpose:
To find a cleaning solution that will work in a high pressure spray wash system for cleaning tanker trucks.
Date Run:
06/17/1999Experiment Procedure:
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.
Trial Results:
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 | |
| Coupon 1 | 4.54 | 1.93 | 11.40 | -6.00 | 1.05 | 8.78 | 9.96 |
| Coupon 2 | 15.25 | 8.17 | 11.13 | 2.34 | -6.36 | 3.73 | 11.83 |
| Coupon 3 | 12.17 | 3.84 | 6.97 | 5.77 | -0.19 | -1.09 | 6.48 |
| Ave | 10.65 | 4.65 | 9.84 | 0.70 | -1.83 | 3.81 | 9.42 |
| Std Dev | 5.52 | 3.20 | 2.48 | 6.05 | 3.97 | 4.94 | 2.72 |
Success Rating:
Test incomplete or inconclusive.Conclusion:
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.
