Trial Purpose:
To evaluate possible aqueous cleaner to be used in ultrasonic cleaning of aluminum parts.
Date Run:
06/22/1999Experiment 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.
