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Published: 01 January 1994
Fig. 4 Tafel plot to determine corrosion current density. β A and β C , anodic and cathodic Tafel coefficients; j , applied current density; j corr , corrosion current density E , potential; E corr , corrosion potential More
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Published: 01 January 2005
Fig. 9 Graphs showing the galvanic-corrosion current density i galv , of ultrapure aluminum (99.999 wt%), 1100 Al, or 6061-T6 Al as a function of the area fraction X C of P100 Gr E , SiC MF E , B MF E , hot-pressed (HP) SiC, HP TiB 2 , and silicon for exposure to aerated 3.15 wt% NaCl More
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005683
EISBN: 978-1-62708-198-6
... current density determination by Tafel extrapolation, potentiodynamic measurement of the polarization resistance, electrochemical impedance measurement, and potentiostatic deaeration. Tests combining corrosion and mechanical forces, such as fretting corrosion tests, environment-assisted cracking tests...
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Published: 01 June 2012
Fig. 3 Theoretical polarization curve for an electrode in the state of passivity, and corrosion current density determination by Tafel extrapolation More
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Published: 01 January 2003
Fig. 7 Effect of H 2 O 2 additions on polarization behavior of copper in 0.01 M citrate solutions. I c , corrosion current density. SCE, saturated calomel electrode reference More
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Published: 15 June 2019
by a specific cathode reaction determines corrosion current density and corrosion rate. More
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Published: 01 January 2005
by a specific cathode reaction determines corrosion current density and corrosion rate. More
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Published: 01 January 2005
Fig. 18 Sample polarization resistance data showing determination of corrosion current density, i corr , from R p . The slope at E oc is called the polarization resistance, R p . The Tafel slopes, b a and b c , must be obtained from anodic and cathodic polarization experiments More
Book Chapter

Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0006547
EISBN: 978-1-62708-183-2
... are related by: (Eq 2) ε ( I ) = η ( I ) + b   log   ( I o / I corr ) where I corr is the corrosion current density. Ignoring the semantic differences between potential and voltage, the definitions used here are overpotential η= E − E o and polarization...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001296
EISBN: 978-1-62708-170-2
... measurements, a defined current flow is applied. In both methods, the potential of the measurement electrode is measured by use of the reference electrode. Tafel Extrapolation An application of polarization measurements is the determination of corrosion current density using the Tafel extrapolation...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003719
EISBN: 978-1-62708-182-5
... Environmental Protection Agency (U.S.) Hz hertz ANSI American National Standards Institute EPDM ethylene-propylene-diene monomer i current density; current API American Petroleum Institute (rubber) Eq equation (also used to label inequalities icorr corrosion current (density) AS arti cial seawater icrit...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0006540
EISBN: 978-1-62708-183-2
... scale designation, such as HRC for Rockwell C hardness HV Vickers (diamond pyramid) hardness Hz Hertz i current density; current icorr corrosion current (density) icrit critical current for passivation ip passive current density I current; current density Iappl applied current Icorr corrosion current IC...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003839
EISBN: 978-1-62708-183-2
... Applied potential E pit Pitting potential g Gaseous state Gr Graphite Gr E Graphite electrode with fiber ends exposed HP Hot pressed i Current density i corr Corrosion current density i galv Galvanic current density l Liquid state MMC Metal-matrix...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006621
EISBN: 978-1-62708-290-7
... direction on Y-axis (corrosion current density) when compared to as-printed Tafel plots of both gas and water-atomized powders. This indicates that the corrosion current density of the LPBF parts decreased and corrosion potential increased following HIP treatment. Furthermore, the passive region in the LPBF...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003647
EISBN: 978-1-62708-182-5
... as the slope of a potential ( E ) versus current density ( i ) curve at E corr , where i = 0: (Eq 2) R p = ( d E d i ) i = 0 = 0 Corrosion current density ( i corr ) is calculated from R p by: (Eq 3) i corr  = B / R p where (Eq 4) B...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003600
EISBN: 978-1-62708-182-5
... or current density. As in typical potentiodynamic analysis, there is an exponential relationship between the current density and the overpotential or the potential difference between the applied and equilibrium potentials. Some electrochemical techniques used for studying corrosion phenomena for bulk...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003644
EISBN: 978-1-62708-182-5
... and technology has been discussed in many textbooks ( Ref 2 , 3 ). The use of mixed-potential theory for the monitoring of corrosion rates was also demonstrated by showing that the slope of a potential versus current density plot at E corr can be used to determine the corrosion rate ( Ref 1 ). Today...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004187
EISBN: 978-1-62708-184-9
... in the nonoxidizing acids. The decrease in anodic exchange current density by molybdenum results in an increase in the corrosion potential as a function of increasing molybdenum content. For the oxidizing acids, the effect of increasing chromium and molybdenum are both important, because the anodic curves...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003586
EISBN: 978-1-62708-182-5
... [ exp ( α a F ( E − E corr ) R T )       − exp ( − α c F ( E − E corr ) R T ) ] where i corr is the corrosion current density, E is the applied potential, R is the ideal gas constant, T is the temperature...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004225
EISBN: 978-1-62708-184-9
... ESCC electrical resistance HV Rockwell C hardness) kilopascal ETFE potential in the reverse scan of a Health and Safety Executive LMC EVD HVAC (U.K.) LME liquid exp cyclic polarization curve for high-temperature hot corrosion LMIE liter f which the current density HWC Vickers (diamond pyramid) pound F...