To compare water with other aqueous products in the removal of the new oil.
Date Run:
08/28/1998
Experiment 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.
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