Pourbaix diagram


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Pourbaix diagram

[¦pu̇r‚bā ′dī·ə‚gram]
(metallurgy)
A plot of potential versus pH used to predict the thermodynamic tendency of a metal to corrode.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Pourbaix diagram plots the equilibrium potential (Ee) between a metal and its various oxidized species as a function of pH.
A Pourbaix Diagram does not have to be limited to two dimensions.
Tyurin, The Revised Pourbaix Diagram for Molybdenum, 2014.
At these potentials and according to Pourbaix diagrams [40], Co, Fe, and Ni are active species while Cr is passive.
Pourbaix diagram has significant role in magnetite formation.
Pourbaix diagram is a graphical representation of the thermodynamic equilibrium of a metal--electrolyte, commonly aqueous solutions, in which the axes represents potential of the metal (electrode) and pH of the aqueous solution.
The half-cell potential and pH of each system was plotted on a Pourbaix diagram. It was found that steel in Portland cement concrete both in distilled water and ASTM seawater were corroded until last day of charging.
The Pourbaix diagram is useful to simplify the complex reactions [30].
According to the Pourbaix diagrams in Figure 2, anodizing Ti, Ti-20Ta, Ti-10Ta, and Ti-10Mo can form anodic oxide films of these Ti alloys.
Known as the Pourbaix diagram, the plot shows several important regions of non-corrosion, slow corrosion, rapid corrosion and hydrogen gas evolution.
As expected, all these values are found in the stability region of Ti[O.sub.2] of the Ti-[H.sub.2]O Pourbaix diagram [24] (Figure 2).
Different bath pHs resulted in different reduction potentials, as confirmed by the Pourbaix diagram, resulting in different overpotentials.