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Trial Number 9

Trial Purpose:

Evaluating cleaners for removal.

Date Run:

10/01/2001

Experiment Procedure:

Seven cleaners were selected based on previous trial. Solutions were diluted to 5% using DI water in 250 ml beakers. All solutions were heated to 120 F on a hot plate.
Twenty-one preweighed coupons were coated with the supplied slurry using a hand held swab and allowed to dry for 2 hours. These coupons were then weighed again. Three coupons were immersed into each beaker to be cleaned for 5 minutes. After the cleaning, the coupons were rinsed in DI water and dried using air blow off. Coupons were then weighed a final time and percent efficiencies were calculated for each cleaner.

Saint Gobain Industrial Ceramics Water Based Alumina (1344-28-1, 102-71-6)

Trial Results:

All seven cleaners removed over 94% of the alumina from the ceramic coupons in the five minutes of cleaning. ND 17 and LPS were the most effective removing just over 97%. The following table lists the calculated efficiencies.

Table 1. Cleaning Efficiencies

Cleaner Coupon 1 Coupon 2 Coupon 3 Average Std Dev Rank
Amberclean 95.40 97.66 90.45 94.50 3.69 5
Micro 90 97.18 95.56 89.58 94.11 4.00 7
LPS 94.91 96.99 100.00 97.30 2.56 2
ND 17 96.68 97.12 98.13 97.31 0.74 1
Inproclean 90.80 97.38 94.54 94.24 3.30 6
Polyspray 97.35 97.06 93.11 95.84 2.37 3
Safety First 96.15 92.91 96.21 95.09 1.89 4

Success Rating:

A follow up test, usually based on company input.

Conclusion:

In order to obtain 100% removal of the contaminant, two simple options could be taken. The first would be to increase the cleaning time and the second would be to use ultrasonic equipment.

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