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anodic reactions

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940127
EISBN: 978-1-62708-302-7
... 3 ;i corr , mA/m 2 ; y, year; and mpy = mils (0.001 in.) per year Fig. 4.8 Tafel polarization curves for anodic and cathodic reactions as related to the nth current channel in Fig. 4.7 , illustrating the dependence of the corrosion current, I corr , on the solution resistance, R S...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910049
EISBN: 978-1-62708-250-1
... polarization curve for the anodic reaction of iron and ferrous ions Fig. 18 Activation polarization curve for the cathodic reaction of hydrogen ions and hydrogen gas Fig. 19 Combined diagram of an anodic reaction and a cathodic reaction with activation polarization. Fig. 20...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310019
EISBN: 978-1-62708-286-0
... to to understand rates of corrosion. The discussion covers two kinetic processes, namely electrode reactions at the cathode and anode and conduction of ions in the electrolyte. The chapter also provides information on passivation and its effect on polarization diagrams. corrosion kinetics passivation...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240323
EISBN: 978-1-62708-251-8
..., cavitation, fretting corrosion, intergranular corrosion, exfoliation, dealloying corrosion, stress-corrosion cracking, and corrosion fatigue. The chapter discusses the processes involved in corrosion control by retarding either the anodic or cathodic reactions. The rate of corrosion is reduced...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060369
EISBN: 978-1-62708-261-7
... . Fig. 15.5 Anode and cathode reactions with the addition of an electrical conductor between the iron and zinc electrodes. The addition of a wire creates a battery, where electrons flow from the corroding zinc to the iron. The corrosion potential of zinc is more anodic than iron, which means that zinc...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910407
EISBN: 978-1-62708-250-1
..., the effects of the chemical reactions occurring at the surface of the protected structure, and the effects of cathodic protection on coatings. corrosion control cathodic protection anodic protection sacrificial cathodic protection systems impressed-current cathodic protection systems stray currents...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940001
EISBN: 978-1-62708-302-7
... The Elementary Electrochemical Corrosion Circuit<xref rid="t65940001-fn1" ref-type="fn">[1]</xref> Criteria for Metal/Aqueous-Environment Reactions: Corrosion Comments on Cathodic Reactions Comments on Anodic Reactions Corrosion Considerations Based on Relative Cathodic and Anodic Equilibrium...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ems.t53730129
EISBN: 978-1-62708-283-9
...) − (There must be O 2 in solution. This is the most common cathode reaction.) O 2 + 4H+ + 4e − → 2H 2 O (There must be O 2 in an acid solution.) Fig. 12.1 Corrosion cell. The anode is where electrons are generated in the external circuit, and the cathode is where they are consumed. Source: Ref...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.9781627082501
EISBN: 978-1-62708-250-1
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610501
EISBN: 978-1-62708-303-4
... with the anodic reaction: (Eq 8) Fe → Fe + + + 2 e − However, if an anodic inhibitor is not present at a concentration level sufficient to block off all the anodic sites, localized attack, such as pitting, can become a serious problem due to the oxidizing nature of the inhibitor...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030180
EISBN: 978-1-62708-282-2
... an electrode by making it a cathode is easily understood, because reduction reactions occur at cathodes. Oxidation reactions occur at the anode, and thus, it is not so readily apparent that an anode can be protected from corrosion, because oxidation reactions involving metals usually lead to dissolution...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.9781627082822
EISBN: 978-1-62708-282-2
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230071
EISBN: 978-1-62708-298-3
.... , and Waters J.M. , 1961a . Reaction of Beryl with Sodium Fluorosilicate Used in Extracting Beryllium from the Mineral , Bull. Inst. Min. Metall. , Vol 70 , p 397 – 406 Hyde K.R. , Robinson P.L. , Waterman M.J. , and Waters J.M. , 1961b . Structural Evidence on the Beryl...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.9781627083027
EISBN: 978-1-62708-302-7
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940087
EISBN: 978-1-62708-302-7
... Fig. 3.1 Polarization curves illustrating charge-transfer polarization (Tafel behavior) for a single half-cell reaction. (a) Anodic polarization. (b) Cathodic polarization. (c) Both anodic and cathodic polarization Fig. 3.2 Deviation in the linear Tafel relationships at higher...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030126
EISBN: 978-1-62708-282-2
... categories: Anodic mechanisms Cathodic mechanisms That is, during corrosion, both anodic and cathodic reactions must occur, and the phenomena that result in crack propagation may be associated with either class of reactions. The most obvious anodic mechanism is that of simple active...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910021
EISBN: 978-1-62708-250-1
.... These are shown schematically in Fig. 2 , where an anode and a cathode on the metal surface in contact with the solution are indicated. The anode and cathode are connected through the solution by an ionic current path, and they are connected through the metal by an electronic path. An electrochemical reaction...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090001
EISBN: 978-1-62708-266-2
... be classed into two basic categories: anodic mechanisms and cathodic mechanisms. That is, during corrosion, both anodic and cathodic reactions must occur, and the phenomena that result in crack propagation may be associated with either type. The most obvious anodic mechanism is that of simple active...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030045
EISBN: 978-1-62708-282-2
... by the bacteria in the reduction of sulfates to sulfides. The following set of equations was proposed to explain this mechanism: (Eq 1) Fe → 4 Fe 2 + + 8 e − Anodic reaction (Eq 2) 8 H 2 O → 8 H + + 8 OH − Dissociation of water...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480331
EISBN: 978-1-62708-318-8
... electrons, thereby making its valence state greater, is said to be oxidized and is called the anode. Likewise, the reduction reaction, which receives the lost electrons, varies depending on the environment. In weak oxidizing (or reducing) environments, the primary reactions are: H...