To further evaluate successful cleaners on additional contaminants.
Date Run:
07/14/2000
Experiment Procedure:
Four cleaners were selected from the previous trial based on the effective cleaning results obtained. All were diluted to 5% by volume using DI water in 600 ml beakers and heated to 130 F in the ultrasonic tank filled with tap water. Twelve preweighed coupons were coated with the grease using a swab and weighed a second time. Three coupons were immersed in the beakers in the ultrasonic unit. Initial observations were made at 5 minute intervals. After 20 minutes, coupons were removed from the ultrasonic energy and rinsed for 30 seconds in tap water at 120 F. Drying was performed with a Master Appliance Corp, Hot-air gun model HG-301A for one minute at 500 F. Coupons were weighed a final time and cleaning efficiencies were calculated.
SUBSTRATE MATERIAL: Aluminum Coupons
CONTAMINANTS: Cello-Seal, Grease CONTAMINATING PROCESS USED: Grease applied using hand held swab
Trial Results:
The Today & Beyond and United Laboratories’ products were successful in removing 90% of the grease from the aluminum coupons. The WR Grace product had one coupon that was 93% clean but the other two coupons were well under 50%. Table 2 shows the efficiencies for the four cleaners evaluated in the trial.
Table 2. Final Coupon Weights
20 minutes
Heatbath
T&B
UL
WR Grace
Coupon 1
32
99.21
97.19
30.03
Coupon 2
52.79
90.36
81.6
43.21
Coupon 3
23.9
97.85
91.08
92.71
Average
36.23
95.81
89.95
55.32
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 uncleaned parts will be cleaned in the Today & Beyond and United Laboratories products using ultrasonic energy. The clean parts will be returned for inspection by the client.
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