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anodic reactions

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Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003595
EISBN: 978-1-62708-182-5
... Abstract Electropolishing is an electrochemical process that involves anodic dissolution of a metal specimen (anode electrode) in an electrolytic cell. This article reviews the two-electrode and three-electrode systems for electropolishing. It presents the equations of anodic reactions...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003578
EISBN: 978-1-62708-182-5
... Abstract Electrochemical, or electrode, reactions occur with charge transfer between neutral or ionic reactants and a conducting material called the electrode. This article discusses cathodic reactions that result in reduction and anodic reactions that result in oxidation. It reviews...
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
..., and electrochemical refining, that consume energy from external sources. Each of these processes consists of an electrochemical cell with an anode, cathode, and conductive medium or electrolyte. Each of these processes involves electrochemical oxidation and reduction reactions. The purpose of this introduction...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003601
EISBN: 978-1-62708-182-5
... reactions in zinc-carbon batteries and lead grid corrosion in lead-acid batteries. corrosion power-generating devices batteries anodes zinc anode mercury battery lithium metal anode rechargeable lithium battery zinc-carbon batteries lead grid corrosion lead-acid batteries THIS ARTICLE...
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Published: 01 January 2003
Fig. 1 Galvanic cells. (a) Schematic illustrating the short-circuit galvanic cell that exists during corrosion. (b) The coupling of an anodic reaction with two distinct cathodic reactions. The relative anodic ( A a ) and cathodic ( A c ) areas of the corroding surface are also illustrated. More
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003584
EISBN: 978-1-62708-182-5
... transfer taking place at the electrode interface within the double layer and of mass transport at the vicinity of the electrode surface are discussed. The article describes the corrosion processes, which involve anodic and cathodic reactions at specific electrode sites. Some experimental methods...
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
..., which are manifested in processes such as cleaning, brightening, etching, conversion coatings, electroplating, and anodizing. Point defects such as vacancies and dislocations agglomerate and accumulate at grain boundaries, which change the interfacial energy and confound the electrochemical reaction...
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
... to the equilibrium between a metal and one of its oxides/hydroxides. The article schematically illustrates a current-potential or polarization curve for an anodic process. kinetics aqueous corrosion equilibrium potentials electrochemical reaction Nernst equation electronic conductivity passive films...
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Published: 30 November 2018
Fig. 7 Schematic of (a) the highly ordered anodic aluminum oxide (AAO) and how it can be disrupted by (b) a nonaluminum or nonmetallic inclusion. Because these particles do not anodize, their presence changes the local chemical potential for the anodizing reaction. Once they are anodized More
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Published: 30 November 2018
Fig. 13 Transmission electron microscopy image of an iron-chromium dispersoid particle in a 6061 aluminum alloy substrate encountering the interface of the anodic oxide during the anodizing reaction. Note the disruption in the normally highly ordered anodic aluminum oxide structure More
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Published: 01 January 2003
Fig. 25 Schematic polarization curves for a charge-transfer-controlled anodic reaction and a mass-transport-controlled cathodic reaction More
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Published: 01 January 2003
Fig. 2 Application of mixed-potential theory showing the electrochemical potential-current relationship for a corroding system consisting of a mass-transport-controlled cathodic reaction and a charge-transfer-controlled anodic reaction. As the fluid velocity increases from 1 to 4 More
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003709
EISBN: 978-1-62708-182-5
... OH, CH 3 NH 2 , N 2 H 4 , OH − , Cl − , CN − , CH 3 COO − , or [Zn(H 2 O) 3 OH] + . Electrochemical Cell It is convenient to consider an electrochemical cell as consisting of two independent electrode or half-cell reactions. The anode supports an anodic reaction, and the cathode supports...
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Published: 30 November 2018
during the anodizing reaction. Copper ions have higher conductivity and therefore higher mobility through the oxide structure as it forms. If they exceed the energy of the polarization wave at the base of the forming pore in the oxide, the ions can escape to the electrolyte; however, they may become More
Book Chapter

By Jude Mary Runge
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006523
EISBN: 978-1-62708-207-5
... the chemical reaction that produces the conversion layer. In fact, equilibrium reactions stop when each free aluminum ion at the surface has been oxidized. Strictly considered, anodizing can be viewed as a corrosion process that yields a self-assembled, highly ordered, nanoscale network of oxide cells that has...
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Published: 01 January 2003
Fig. 10 Evans diagram for one anodic dissolution reaction coupled (separately) to one of two different oxidant reduction reactions. (a) The two oxidant reduction reactions have similar kinetic characteristics (i.e., similar current-potential shapes). (b) The two oxidant reduction reactions 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
... electrodes. The processes governing corrosion: These are electrode processes, involving oxidation and reduction reactions (or anodic or cathodic reactions). The corroding system does not produce any net charge and, thus, the electrons produced by the electrochemical oxidation of the metal (the anodic...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006483
EISBN: 978-1-62708-207-5
... produced by a self-baking process by the cell process heat. Both the prebaked and Søderberg anodes are consumed in the electrolytic anode reactions to produce CO 2 . Søderberg cells operate at a lower electrical current and have a higher energy consumption compared with prebake cells. Additionally...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004170
EISBN: 978-1-62708-184-9
... Abstract This article discusses the influence of the materials, design, package type, and environment on corrosion in microelectronics. It describes the common sources and mechanisms of corrosion in microelectronics, including anodic, cathodic, and electrolytic reactions resulting in uniform...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003549
EISBN: 978-1-62708-180-1
...: the oxidation of zinc and the reduction of hydrogen ions: (Eq 3) Oxidation (anodic reaction) Zn  → Zn 2 + + 2 e (Eq 4) Reduction (cathodic reaction)  2 H + + 2 e → H 2 An oxidation or anodic reaction is indicated by an increase in valence or a release...