
Quasi - stationary polarization methods such as potentiodynamic polarization or stepwise increasing the potential are traditional techniques in corrosion testing. The resulting polarisation curves give insight to mechanisms. In many cases the corrosion rate in a given environment can be calulated simply from typical parts of the polarisation curve ("Tafel Line" evaluation). Moreover, the behaviour of materials can be checked qualitatively: passivation and loss of passivation, and onset of localised corrosion is easily interpreted from these curves.
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