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Home > Forums > Materials Engineers > Activities > Corrosion engineering Forum

Pourbaix diagram question

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NathanHussey (Mechanical)

9 Jul 12 12:48

Hi,
I am confused about construction of pourbaix diagrams. Simply, why are oxidizing conditions more positive & reducing conditions more negative?

Seems different to the electrochemical series, where reducing elements (or more cathodic) are more positive.

Thanks in advance for your clarifications.

EdStainless (Materials)

9 Jul 12 17:23

it is by convention. The + and - are by definition.

= = = = = = = = = = = = = = = = = = = =
Plymouth Tube

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