Interactive Resource icon  Construction of Pourbaix Diagrams

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Description: Potential-pH or Pourbaix diagrams are powerful tools in electrochemistry. They show graphically the regions of thermodynamic stability for metal/electrolyte systems and they are used to predict whether or not a metal could corrode or not. The Nernst equation is used to construct these diagrams. This exercise explains how the Pourbaix diagrams for water, zinc and copper are constructed. You are then asked to construct the Pourbaix diagram for aluminium yourself. The first step in constructing a Pourbaix diagram is the stability diagram for water.
Keywords: Pourbaix diagram • Nernst equation • potential • pH • stability
Categories: Science approaches > Thermodynamics & kinetics
Science approaches > Corrosion & degradation
Science approaches > Corrosion & degradation > Corrosion principles
Materials > Metals & alloys > Aluminium & alloys
Created by: MATTER, The University of Liverpool
Steven Meijers, Corus
Carlos Caicedo-Martinez, Corus
Contributions: Andreas Blistein, Alcan
Herman Terryn, Vrije Universiteit Brussel (VUB)
Iris De Graeve, Vrije Universiteit Brussel (VUB)
Marc Ryckeboer, Sapa
Published by: European Aluminium Association, Brussels
License: This resource is released under the Creative Commons Attribution Non-Commercial No Derivatives license (2.0 UK: England & Wales).
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Date created: 10 October 2005
Date added: 06 July 2010
Resource ID: 2851