A routine versatile galvanostatic procedure is described for measuring corrosion rate by polarization resistance. The galvanostatic procedure has been most useful and effective under transient conditons when corrosion rate and corrosion potential are changing with time or when relatively rapid corrosion potential fluctuations are present due to localized corrosion. At each step of the procedure, it is possible to monitor polarization to steady-state, a condition which has been found essential for accurate measurement of polarization resistance, especially at low corrosion rate. Comparisons are made with potentiodynamic scanning methods which have been favored in recent years.
National Association of Corrosion Engineers
1983
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