To evaluate previous cleaners for fourth contaminant
Date Run:
08/23/2002
Experiment Procedure:
Three products from that were successful in precious trials were used at full strength in 600 ml beakers. In addition to these products, another semi-aqueous product was selected from the lab's database and used at full strength. A fifth product was also selected from the lab's databases. The fifth product was diluted to 10% using DI water in a 600 ml beaker. All five products were degassed for 5 minutes using a Crest 40 kHz ultrasonic tank. Fifteen preweighed coupons were coated with Emerson & Cuming C-990 Spec 333 (7440-22-4, epoxy resin, Cresol Novolac Polymer) using a hand held swab. The coating was allowed to sit for 15 minutes, followed by a second coupon weighing. Three coupons were cleaned in each solution for 5 minutes using ultrasonic energy. After cleaning, coupons were rinsed in tap water at 68 F for 15 seconds and dried using air knives at 68 F for 2 minutes. Once dry, final weights were recorded and efficiencies calculated.
Trial Results:
The four semi-aqueous products were very successful in removing over 99% of the coating. It was noted that they required less than the 5 minutes of cleaning. Approximately 3 minutes would have yielded the same results. The aqueous product removed just over 88% of the coating. The table below lists the amount of contaminant applied and removed for each coupon cleaned.
Cleaner
Initial wt
Final wt
% Removed
Bio T Max
0.3411
0.0026
99.24
0.5844
0.0019
99.67
0.4694
0.0041
99.13
DS-108
0.6949
0.0010
99.86
0.3751
0.0017
99.55
0.6663
0.0011
99.83
Solsafe 245
0.5104
0.0018
99.65
0.6354
0.0020
99.69
0.3860
0.0018
99.53
Ionox HC 2
0.4349
0.0015
99.66
0.5060
0.0061
98.79
0.3631
0.0002
99.94
Amberclean
0.4216
0.0298
92.93
0.5635
0.1195
78.79
0.8262
0.0618
92.52
Success Rating:
A follow up test, usually based on company input.
Conclusion:
The next test will be to use these successful cleaners for the next contaminant.
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