FDEMSFrequency Dependent Electromagnetic Sensing
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Next, the FDEMS sensor is used to examine the extent of softening of the first coat if 24 hr elapse before the second coating is applied.
The ability of the FDEMS sensor to monitor cure in a proprietary latex coating is shown in Figure 6.
Figure 7 displays the output of a FDEMS sensor which monitored UV cure of a specially formulated epoxy coating.
The one-second delay may reflect either the diffusion kinetics and/or the fact that the FDEMS sensor sees the bottom portion of the epoxy coating.
Figure 9a, an enlargement of Figure 7, displays the sensitivity of the FDEMS signal to monitor cure completion over the 0.5-2.5 min time period.
Finally, Figures 9 and 10a-c display the ability of the FDEMS output to monitor and compare the cure properties of three different formulations.
The flask was outfitted with a packed column condenser, an air driven stir bar, an FDEMS sensor, and a glass stopper on the flask's flute for addition of ingredients.
Then, this acid number was correlated with the FDEMS sensor data at the time of sampling.
Finally, we examine the ability of the FDEMS sensor to monitor buildup in durability.
In other experiments to monitor durability, the FDEMS sensor was placed on the metal liner of a tank and then a protective coating was applied before filling the tank with hydrochloric acid.