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.
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
|