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equilibrium potential

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Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003604
EISBN: 978-1-62708-182-5
...Abstract Abstract Principles of metallic corrosion play a fundamental role in developing industrial processes that employ corrosion for constructive purposes. This article examines the changes in kinetics that occur with differentially small potential changes around the equilibrium electrode...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003583
EISBN: 978-1-62708-182-5
...Abstract Abstract This article provides a general introduction to the kinetics of aqueous corrosion with an emphasis on electrochemical principles. It describes the thermodynamic basis for corrosion by determining the equilibrium potentials of electrochemical reactions from the Nernst equation...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003579
EISBN: 978-1-62708-182-5
..., reduction of dissolved oxygen, metal ion reduction, and metal deposition. The article also presents the standard equilibrium potentials measured at 25 deg C relative to a standard hydrogen electrode for various metal-ion electrodes in a tabular form. electrode potential thermodynamics kinetics...
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
...Abstract 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...
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Published: 01 January 2005
Fig. 1 Potential-pH equilibrium diagram for niobium-water at 25 °C (75 °F) More
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Published: 01 December 2004
Fig. 13 Polarization curves representative of an alloy in a deaerated-acid environment showing active/passive behavior. E H is the equilibrium potential for the hydrogen reaction. E M is the indefinite potential near which metal dissolution is very small. E corr is the corrosion More
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Published: 01 January 1997
of surface oxide, followed by breakdown or dissolution of oxide at higher overpotentials. E eq , equilibrium potential More
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
... in a galvanic cell or is imposed on an electrolytic cell, reactions at both electrodes are not at equilibrium, and there is consequently an overpotential on each of them. The potential difference measured between the two electrodes then includes the value of the two overpotentials, and it is not possible...
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...
Image
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
Image
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: 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...