To evaluate possible aqueous cleaner to be used in ultrasonic cleaning of aluminum parts.
Date Run:
06/22/1999
Experiment Procedure:
Six cleaners were selected based on vendor supplied information and from the lab’s Effective Tests Conditions Database. Five of the six cleaners were diluted to 5% by volume in 400 mL Pyrex beakers and heated to 130 F on a hot plate. The six cleaner was made into 7.7% mixture and only heated to 105 F as recommended by the vendor. Table 1 lists the cleaners selected and the dilutions used.
Eighteen preweighed coupons were contaminated with vanishing film and weighed again. Three coupons were cleaned in each beaker and cleaned using stir-bar-agitation for five minutes. Coupons were rinsed in 120 F tap water for 30 seconds and dried using a Master Appliance Corp, Hot-air gun model HG-301A for one minute at 500 F. After cooling to room temperature, final weights were recorded and cleaning efficiencies were calculated.
SUBSTRATE MATERIAL: Aluminum Coupons (5052)
CONTAMINANTS: Tuf Draw Vanishing Film 2889 (CAS #: 64741-65-7) CONTAMINATING PROCESS USED: Coupons were coated using a hand held swab.
Trial Results:
All of the cleaners selected removed over 98% of the contaminant from the aluminum coupons. The highest efficiency was the Oakite Inproclean 3800 at 99.74%. Table 2 lists the effectiveness of the six cleaners tested.
Table 2. Cleaning Efficiencies
Cleaner
ForBest
Gemtek
US Polychem
Calgon
WR Grace
Oakite
Coupon 1
98.99
99.18
99.36
99.58
99.58
99.62
Coupon 2
99.89
98.58
99.18
100
99.76
99.72
Coupon 3
99.20
98.56
99.77
99.17
97.8
99.89
Average
99.36
98.77
99.44
99.58
99.05
99.74
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
Conclusion:
All six cleaners will be evaluated using the other process contaminant currently involved with manufacturing process.
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