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To compare water with other aqueous products in the removal of the new oil.
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.
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|
Success Rating:Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
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.