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Pourbaix diagram

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Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003580
EISBN: 978-1-62708-182-5
... temperature aqueous solution THE PRINCIPLE OF POTENTIAL-pH DIAGRAMS was established in the 1940s in Belgium by Marcel Pourbaix ( Ref 1 , 2 , 3 , 4 ). A potential- pH diagram is a graphical representation of the relations, derived from the Nernst equation, between the pH and the equilibrium potentials...
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Published: 01 January 2005
Fig. 1 Pourbaix diagram for aluminum with an Al 2 O 3 ·3H 2 O film at 25 °C (75 °F). Potential values are for the standard hydrogen electrode (SHE) scale. Source: Ref 3 More
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Published: 01 January 2005
Fig. 1 Pourbaix diagram for magnesium as developed by Perrault. Source: Ref 3 More
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Published: 01 January 2005
Fig. 1 Simplified Pourbaix diagram for uranium in water at 25 °C (77 °F). V NHE , voltage vs. normal hydrogen electrode. V SHE , voltage vs. standard hydrogen electrode. See Ref 3 for full diagram. More
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Published: 01 June 2012
Fig. 1 Pourbaix diagram for cobalt More
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Published: 01 January 2003
Fig. 1 Potential-pH (Pourbaix) diagram for the system of magnesium and water at 25 °C (77 °F), showing the theoretical domains of corrosion, immunity, and passivation. Source: Ref 1 More
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Published: 01 January 1997
Fig. 5 Pourbaix diagram for the nickel/water system, indicating the E /pH regions of thermodynamic stability of various dissolved and solid species and the regions of “corrosion immunity,” “passivation,” and “active corrosion.” Dashed lines show the equilibrium potentials for the (a) H 2 /H 2 O More
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Published: 01 January 1997
Fig. 6 Pourbaix diagram for aluminum/water More
Book Chapter

By Jerome Kruger
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003585
EISBN: 978-1-62708-182-5
... and the Pourbaix diagram. The article presents a potential-pH diagram for the iron-water system and an illustration of an idealized anodic polarization curve for a metal surface, which serves as a basis for describing the kinetics of passivation. It discusses five properties of passive films: thickness...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006522
EISBN: 978-1-62708-207-5
... it will impact corrosion resistance and surface treatment. It describes the thermodynamics of equilibrium oxidation processes and non-equilibrium corrosion processes. The article provides a discussion on aluminum oxidation under atmospheric and dynamic conditions. It presents the potential/pH (Pourbaix) diagram...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003606
EISBN: 978-1-62708-182-5
...Abstract Abstract This article discusses the elements necessary for a galvanic cell operation. Detailed information on the possible corrosion reaction as a function of aqueous electrolyte concentration and pH, in the presence of certain ions, are provided using Pourbaix diagrams. A variety...
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Published: 01 January 2005
Fig. 1 Pourbaix (potential-pH) diagram for the titanium-water system at 25 °C (75 °F). Source: Ref 9 More
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Published: 01 January 2006
Fig. 1 Pourbaix (potential-pH) diagram for the system iron-water at 25 °C (75 °F). Source: Ref 4 More
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Published: 01 January 2003
Fig. 14 Potential-pH diagram (Pourbaix) for iron in water at 25 °C (77 °F). A decrease in pH from 9 to 6 at potential of −0.2 V, which shifts iron from a region of stability to one of active corrosion, is indicated by the solid bar. More
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Published: 01 January 1997
Fig. 8 Superposition of the MoO 4 and Cr 2 O 3 stability regions (shaded) on the nickel/water Pourbaix diagram, to illustrate the thermodynamic reason for the improved corrosion resistance of various nickel alloys in neutral and acid environments More
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Published: 01 January 2003
Fig. 12 Relationship between pH-potential conditions for severe cracking susceptibility of carbon steel in various environments and the stability regions for solid and dissolved species on the Pourbaix diagram. Note that severe susceptibility is encountered where a protective film (phosphate More
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Published: 01 January 1997
Fig. 7 Superposition of the Cr 2 O 3 stability regions (shaded) on the iron/water Pourbaix diagram, to illustrate the E /pH regions where chromium alloying might confer added corrosion resistance. Dashed lines show the equilibrium potentials for (a) H 2 /H 2 O and (b) O 2 /H 2 O More
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003715
EISBN: 978-1-62708-182-5
... reaction) must be consumed by an electrochemical reduction reaction (the cathodic reaction). Potential-pH ( E -pH) diagrams (Pourbaix diagrams), based on equilibrium thermodynamics for metal-water systems, show at a glance the regions of stability of the various phases that can exist in the system...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003581
EISBN: 978-1-62708-182-5
... ) and molten salts ( Ref 15 ) Thermodynamics of Molten Salt Corrosion Corrosion of metals in aqueous solution has been studied for many years, and the thermodynamic principles have been discussed by Pourbaix ( Ref 16 , 17 ). The applicable principles are commonly summarized in Pourbaix diagrams...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003592
EISBN: 978-1-62708-182-5
... to this reference into values expressed with respect to other references. In particular, the conversion of the potentials from or to the hydrogen scale is frequently required for use of potential- pH diagrams, which are discussed in the article “Potential versus pH (Pourbaix) Diagrams” in this Section...