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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