Gamry Instruments Universal Dummy Cell 3 Benutzerhandbuch - Seite 8

Blättern Sie online oder laden Sie pdf Benutzerhandbuch für Prüfgeräte Gamry Instruments Universal Dummy Cell 3 herunter. Gamry Instruments Universal Dummy Cell 3 8 Seiten. Circuit board used for calibration and troubleshooting of a gamry potentiostat.

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--DC Corrosion--

A Tafel fit of a typical scan (both with and without iR compensation) can be seen below. Both the anodic and

cathodic Tafel constants were calculated to be between 60 and 70 mV per decade. The calculated corrosion

rate is quite small (about 10

mm/year) because of the very small I

(about 10

Amps/cm

-3

-10

corr

Note that the Schottky diodes used to produce the linear log current versus potential behavior have a fairly high

variability. Both the current at zero volts and the slope of the log current versus potential plot vary significantly

diode to diode.

For this reason, you should use the results obtained with the DC Corrosion Test cell with some caution. The

shape of the Tafel curve is important, but the values obtained in a Tafel fit are not.