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Electrochemical Noise and Galvanic CorrosionAddition of Corrosive Agents
If you are using the ParaCell with a potentiostat sold by a different manufacturer, consult that potentiostat's
instructions for information on how to connect the electrodes.
Electrochemical Noise and Galvanic Corrosion
The ParaCell was designed to work for a wide variety of experiments, but it is ideal for galvanic corrosion and
noise experiments. These are ZRA (Zero Resistance Ammeter)-mode corrosion experiments that measure the
current passed between two electrodes of equal size. In galvanic corrosion the metals are different, whereas in
noise they are the same.
ZRA mode makes use of the counter sense lead (orange) from a Gamry potentiostat. For galvanic corrosion and
other ZRA-mode experiments with non-Gamry ZRAs, the reference replaces the counter sense lead (Work-
Work Sense on one electrode, Reference-Counter on the other).
Customizing Your Cell
The ParaCell was designed to have options available even for a user who uses two references and two
"working" electrodes. There are a total of six ports, but only three or four are necessary for most experiments.
With two to three spare access ports and full access with the cell dissassembled, customization options are
myriad. Some common modifications to experiments are mentioned below.
Addition of Corrosive Agents
You can add reagents through spare ports. In many experiments, you record a baseline curve before you add a
vital reactant to the cell. You then add that reactant, stir the cell, then record another curve. Many of Gamry's
analysis packages allow you to subtract the baseline curve from the data curve. The resulting curve shows only
electrochemistry related to this reactant.
Temperature Sensing
The rate of almost all chemical reactions is strongly temperature-dependent. For this reason, you might want to
measure the temperature of your cell.
Many thermometers will fit the standard bushing for a #7 thread. This is an convenient way to add temperature
measurement to your system.
Addition of a pH Electrode
Another possible use for the space port is addition of a pH electrode. An adapter may be required.
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