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ASM Handbook

Corrosion: Fundamentals, Testing, and Protection

Edited by
Stephen D. Cramer
Stephen D. Cramer
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Bernard S. Covino, Jr.
Bernard S. Covino, Jr.
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ASM International
Volume
13A
ISBN electronic:
978-1-62708-182-5
Publication date:
2003
Book Chapter

Potential versus pH (Pourbaix) Diagrams

By
E. Protopopoff
E. Protopopoff
CNRS, Ecole Nationale Supérieure de Chimie de Paris, Université Pierre et Marie Curie
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P. Marcus
P. Marcus
CNRS, Ecole Nationale Supérieure de Chimie de Paris, Université Pierre et Marie Curie
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Published:
2003
Page range:
17 - 30
Publication history
December 01, 2003

Abstract

A potential pH diagram is a graphical representation of the relations, derived from the Nernst equation, between the pH and the equilibrium potentials (E) of the most probable electrochemical reactions occurring in a solution containing a specific element. This article describes three types of reactions for calculation and construction of E-pH diagrams: electrochemical reactions of pure charge (electron) transfer; reactions involving both electron and solvated proton transfer; and acid-base reactions of pure solvated proton transfer. It illustrates the practical use of E-pH diagrams for temperature aqueous solutions and adsorbed species and in prediction of corrosion of nickel and copper.

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E. Protopopoff, P. Marcus, 2003. "Potential versus pH (Pourbaix) Diagrams", Corrosion: Fundamentals, Testing, and Protection, Stephen D. Cramer, Bernard S. Covino, Jr.

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