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polarization cells

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910049
EISBN: 978-1-62708-250-1
... Schematic diagrams of the three forms of activation polarization control Fig. 21 Onset of concentration polarization at more reducing potentials for a cathodic reduction reaction Fig. 22 Effect of ohmic polarization on the current in a corrosion cell Fig. 23 Mixed-potential...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1984
DOI: 10.31399/asm.tb.mpp.t67850267
EISBN: 978-1-62708-260-0
... the difference between amplitude and optical-phase features and how they are revealed using appropriate illumination methods. It compares images obtained using bright field and dark field illumination, polarized and cross-polarized light, and interference-contrast techniques. It also discusses the use...
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 July 2000
DOI: 10.31399/asm.tb.fec.t65940233
EISBN: 978-1-62708-302-7
... (as with the polarization-resistance method) that the surface of the material is not disturbed. In the EIS method, the electrochemical cell is modeled by an equivalent electrical circuit with each element in the circuit corresponding to an electrochemical, chemical, or physical process taking place in the cell...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910427
EISBN: 978-1-62708-250-1
... at the anode and cathode in an electrochemical cell. The current is equivalent to the reaction rate in an operating corrosion cell. The greater the current, the greater the corrosion rate; that is, the polarization of an operating corrosion cell is due to activation polarization, concentration polarization...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.9781627083027
EISBN: 978-1-62708-302-7
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
... the half-cell potentials, and the electrode states are then defined as being polarized . The polarization is quantified as overpotentials η, which are defined by the deviation from the equilibrium half-cell potentials, that is, for the cathode, η c = E cathode − E O2/OH and for the anode, η...
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 July 2000
DOI: 10.31399/asm.tb.fec.t65940127
EISBN: 978-1-62708-302-7
...) as a consequence of the polarized half-cell potentials between the metal and the solution at a given anodic site (E″ M ) and a corresponding cathodic site (E″ X ). These are polarized interface potentials (E″) because a current is passing, the interface potential being related to the local current density...
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
..., the grain boundaries become anodic. Accumulation of positive ions near the anode and negative ions near the cathode ( Fig. 12.6 ) will polarize the cell, decreasing the voltage. With polarization, the corrosion current decreases, as indicated in Fig. 12.7 . Fig. 12.6 Polarization is caused...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030223
EISBN: 978-1-62708-349-2
... composite materials. By imitating the natural geometric structure of a beehive, the honeycomb core imparts strength and light weight to sandwich panels, while supporting the prepreg skins. The honeycomb sandwich structure composite has high compressive strength in the direction of the cell walls and high...
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 2000
DOI: 10.31399/asm.tb.fec.t65940183
EISBN: 978-1-62708-302-7
... are extrapolations of lines 13 and 17. Based on Ref 2 Fig. 5.4 Representative polarization curve for iron in buffered solution of pH = 7. Dashed curve extends to the half-cell potential of iron with a Fe 2+ = 10 –6 . Letters along curves relate to reactions (details can be found in the text...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350011
EISBN: 978-1-62708-315-7
... reaction, reduction, would proceed simultaneously at the cathode. In most cases, hydrogen gas is produced on the cathode. When the gas layer insulates the cathode from the electrolyte, current flow stops, and the cell is polarized. However, oxygen or some other depolarizing agent is usually present...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910407
EISBN: 978-1-62708-250-1
... corrosion cell on a buried steel pipe. Under freely corroding conditions, an area on the steel surface becomes an anode, and another area becomes a cathode. The potential difference between the anode and cathode gives rise to a corrosion current flowing from the anode into the soil. The corrosion current...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940023
EISBN: 978-1-62708-302-7
... results in:  Electrode designation Anode Cathode  Terminal polarity Negative Positive  Electrode reaction Oxidation (corrosion) Reduction  Current flow in external circuit ← I  Electron flow in external circuit e → Potentials of some reference electrodes or half cells...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870025
EISBN: 978-1-62708-299-0
... fraction of the second-phase particles. The degree to which aluminum corrodes when coupled to a more cathodic metal depends on the degree to which it is polarized in the galvanic cell. It is especially important to avoid contact with a more cathodic metal where aluminum is polarized to its pitting...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030245
EISBN: 978-1-62708-349-2
... the lightning strike zone where the expanded aluminum foil was vaporized. The surface shows only slight damage. Slightly uncrossed polarized light, 10× objective Fig. 15.8 Macroimage of an area under the lightning strike attachment point showing crushing of a honeycomb cell wall. Bright-field...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230459
EISBN: 978-1-62708-298-3
... to Carbides and Other Inclusions 25.4 Polarization Studies 25.5 Pitting Corrosion 25.6 Crystallographic-Orientation Effect on Corrosion 25.7 Contamination Sources and Corrosion Prevention 25.8 Effect on Mechanical Properties References References ASTM C203-05 . “ Standard Test...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110485
EISBN: 978-1-62708-247-1
... the polarity and concentration of the dopant are recorded simultaneously, yielding an image representative of the electrically active dopants. Figure 16 shows two NFETs; part of a SRAM cell that has been chemically de-processed to the silicon level. The sample surface was oxidized [10] and analyzed...