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Trial Number 1
Trial Purpose:
To further evaluate cleaners from previous trial on second buffing compound.
Date Run:
03/28/2000
Experiment Procedure:
Four cleaners were selected based on the results of the previous trial. The chemistries were diluted to 5% in 600 ml beakers using DI water and then heated to 130 F on a hot plate. Twelve preweighed brass coupons were contaminated with the buffing compound and weighed again. Three coupons were cleaned in one solution for five minutes using stir-bar agitation. Coupons were rinsed in tap water at 120 F for 30 seconds and dried using a Master Appliance Corp, Hot-air gun model HG-301A at 500 F for one minute. After coupons returned to room temperature, final clean weights were recorded and the percent efficiency was calculated.
SUBSTRATE MATERIAL: Brass Coupons
CONTAMINANTS: Matchless Metal Polishing Co. Z-230 Buffing compound (7429-90-5) CONTAMINATING PROCESS USED: Manual rub of buffing compound onto coupons
Trial Results:
All four products tested were very successful in removing the second buffing compound from the brass coupons. The U.S. Polychem Polyspray Jet 790 P again removed all of the contaminant. (The efficiencies were over 100% and was due to the buffing compound removing some of the oxidation that had occurred on the coupons). The other three cleaners removed over 87% of the buffing compound. Table 2 lists the efficiencies for each cleaner evaluated.
Table 2. Cleaning Efficiencies
Cleaner
Micro 90
Inproclean
Polyspray
Daraclean
Coupon 1
90.38
94.9
101.32
96.1
Coupon 2
90.83
90.32
102.13
80.94
Coupon 3
90.91
91.18
101.57
84.94
Average
90.71
92.13
101.68
87.33
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
Conclusion:
Having determined that all of the cleaners were effective in removing the buffing compound using only simple immersion agitation, all four will be used to clean the supplied parts in a Crest 40 kHz ultrasonic tank model 4Ht 1014-6.
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