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Topic: What is overvoltage and polarization?  (Read 2858 times)

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Offline confusedstud

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What is overvoltage and polarization?
« on: June 11, 2014, 04:45:57 AM »
So in my notes and during the lecture we were taught that overpotential is when the potential of the electrode deviates from the equilibrium potential. A graph of E vs logi was drawn and when the E increases it is known as anodic polarization and when E decreases cathodic polarization. But i was thinking that anodic polarization meant that the anodic reactions would occur more and more and so if the E value increases during this polarization, then it would mean that the E is representative of the oxidation potential.

But my lecturer told me it wasn't oxidation or reduction potential. It was just a 'potential'. But I don't understand what it means. Why does the potential increase when anodic polarization occurs?

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