Trial Purpose:
To compare water with other aqueous products in the removal of the new oil.
Date Run:
08/28/1998Experiment Procedure:
Six different chemistries were selected from the laboratories databases based on previous uses and vendor information. One cleaner was made into a 10% solution and the others into 5% solutions using DI water in a 400 mL beaker. In addition to the aqueous cleaners selected, DI water was used as the seventh cleaner. A rust inhibitor was added to the water. All 7 cleaners were heated to 140 F on a hot plate. Twenty-one preweighed coupons were contaminated with the new oil and a second weighing was performed. Three coupons were placed in each cleaner for 5 minutes with stir-bar agitation. Coupons were rinsed in tap water at 120 F for 30 seconds and allowed to air dry for 1 hour. Final, clean weights were recorded.
SUBSTRATE MATERIAL: Al #202-3003 H-14
CONTAMINANTS: Oil-Second oil supplied by client
CONTAMINATING PROCESS USED: Oil was applied to coupons using a hand-held swab.
Trial Results:
All of the selected cleaners showed excellent removal of the oil. It was observed that the cleaning time could be lowered from 5 minutes to under 3 minutes. The water was just as effective as the aqueous cleaners. Table 1 list the cleaning efficiencies.
Table 1. Cleaning Efficiency
| MC 580 | Natural Blue | SWR One | 2000 XS | Sea Wash | Super Neutral | Water | |
| Coupon 1 | 99.49 | 100.3 | 99.99 | 99.19 | 100 | 99.92 | 99.47 |
| Coupon 2 | 99.98 | 100.1 | 99.98 | 99.83 | 99.93 | 99.95 | 99.85 |
| Coupon 3 | 99.71 | 98.82 | 99.8 | 100.3 | 99.98 | 99.81 | 99.94 |
| Ave | 99.73 | 99.74 | 99.92 | 99.77 | 99.97 | 99.89 | 99.75 |
| Std Dev | 0.25 | 0.80 | 0.11 | 0.56 | 0.04 | 0.07 | 0.25 |
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.Conclusion:
The new oil was easily removed from the aluminum substrate within 3 minutes of minimal agitation. The three coupons cleaned in the water solution have been sent to be analyzed by the client.
