To find a cleaning solution that will work in a high pressure spray wash system for cleaning tanker trucks.
Date Run:
06/17/1999
Experiment 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.
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