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polarization-resistance

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940233
EISBN: 978-1-62708-302-7
... establishing relationships for the analysis of corrosion rates by the experimental techniques of Tafel-curve modeling and polarization resistance. It is emphasized that more generally, I ex is the experimentally measured current representing the net difference between the sum of all oxidation-reaction...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940183
EISBN: 978-1-62708-302-7
... polarization but rather suddenly decreases near –800 mV (SHE) due to formation of a surface coating of Zn(OH) 2 , which increases the circuit resistance and hence decreases the current density. The decay of the “free” electrode potential is shown in Fig. 5.1(d) . In this case, the potential decreases rapidly...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910427
EISBN: 978-1-62708-250-1
... 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, and ohmic polarization. The sum of all these resistance elements throughout the corrosion...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030019
EISBN: 978-1-62708-282-2
... passive states in a manner similar to stainless steels ( Table 1 ). These alloys are readily polarized, and galvanic effects on other less noble metals and alloys therefore tend to be minimized. Cobalt-base alloys, most of which are chromium bearing, are resistant to galvanic corrosion because of...
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 resistivities of some test solutions are shown in Table 2 . Viewing the electrochemical cell as an electrical circuit, Kirchoff’s law can be used to design a so-called polarization diagram. Consider, as a case study, a steel corroding under deaerated conditions, in a water solution, as shown...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940127
EISBN: 978-1-62708-302-7
... equation) and the polarization behaviors of the anodic and cathodic reactions. The current distribution parameters are the relative geometries of the anodic and cathodic areas, the specific resistivity of the solution and any other resistances to current flow such as those existing at interfaces and within...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030184
EISBN: 978-1-62708-282-2
... ). The –850 mV CSE criterion with the cathodic protection applied does not compensate for the IR potential drop that can be significant, especially in high resistivity environments. In recent years it has become common to apply an “instant-off” criterion, termed a “polarized potential” in the 1996...
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 June 2007
DOI: 10.31399/asm.tb.pmsspmp.t52000147
EISBN: 978-1-62708-312-6
... region (or the greater E pit – E corr ), the better the resistance to pitting corrosion and the better the passivating characteristics. Of the various features of a polarization curve, E pit is probably the most widely studied characteristic, because it is very marked and distinct. Fig. 9.4...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910049
EISBN: 978-1-62708-250-1
... corrosion and the factors that control the rates of corrosion reactions requires examination of the concepts of polarization behavior and identification of the various forms of polarization in an electrochemical cell. These concepts, addressed in the remaining of this chapter, include anodic and cathodic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870191
EISBN: 978-1-62708-299-0
... the basic factors that influence design for corrosion resistance and discusses the use of conversion coatings, organic coatings, porcelain enameling, and electroplating. It also discusses corrosion monitoring methods used in chemical processing and refining industries. aluminum aluminum alloys...
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
... Nickel—A Tin Lead Lead–tin solder 12% Ni, 18% Cr, 3% Mo steel—A 20% Ni, 25% Cr steel—A 14% Ni, 23% Cr steel—A 8% Ni, 18% Cr steel—A 7% Ni, 17% Cr steel—A Ni-resist 23 to 30% Cr steel—A 16 to 18% Cr steel—A 12 to 14% Cr steel—A 4 to 6% Cr steel—A Cast iron...
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 December 2003
DOI: 10.31399/asm.tb.cfap.t69780164
EISBN: 978-1-62708-281-5
... any area NBR Buna N, nitrile Acrylonitrile-butadiene Electrical properties not outstanding; probably degraded by molecular polarity of acrylonitrile constituent IIR Butyl Isobutylene-isoprene Electrical properties generally good but not outstanding in any area IIR Chlorobutyl...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090043
EISBN: 978-1-62708-266-2
... lower-strength steels ( Ref 2.26 ). Cathodic polarization of steel by coupling to a magnesium anode also reportedly increases the tendency for intergranular cracking in quenched and tempered steels in aqueous chlorides ( Ref 2.25 ). At high stress intensities, cracking can occur transgranularly by...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350001
EISBN: 978-1-62708-315-7
... them in critical industries such as mining, energy production, transportation, and mineral and chemical processing. The chapter also describes basic approaches to dealing with corrosion and wear in steel. corrosion protection corrosion resistance steel wear resistance SURFACE ENGINEERING...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780305
EISBN: 978-1-62708-281-5
... predicting crack growth rates under stable crack growth conditions, and thus is critical in determining the service life of a given thermoplastic system. As engineering plastics find their way into new and more demanding applications, their resistance to failure in specific chemical environments becomes...
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 copper-copper sulfate reference electrode). Other criteria applied to the protection of steel include the following: Maintain a minimum negative shift of 300 mV (0.3 V) from the freely corroding potential Provide a minimum 100 mV shift on the polarization decay when cathodic protection is...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110196
EISBN: 978-1-62708-247-1
... process [15] . The voltage or current variations due to the resistance variation are calculated with equations 2 or 3 . The reduction or increase in the power consumption variation is directly related to the metal temperature coefficient of resistance. Therefore, the polarity of the TLS signal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090333
EISBN: 978-1-62708-266-2
... possess an extremely high corrosion resistance ( Ref 13.1 ). The mechanical behavior of amorphous alloys prepared by rapid quenching from the liquid state (by melt spinning, for example) is also remarkable. They are very strong and stiff, but tough; for example, amorphous iron-base alloys have a fracture...