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linear polarization resistance

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940183
EISBN: 978-1-62708-302-7
... generally represented as showing linear or Tafel behavior, and the cathodic curves are shown with both Tafel and diffusion control characteristics. The intersection of these curves allows the corrosion current density and, hence, corrosion rate to be determined. It is shown how the several kinetic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940127
EISBN: 978-1-62708-302-7
... − [ E ′ M + β ox , M   log I corr / A a i o , M ] n ( R S ) n Equation 4.25 can be interpreted in relationship to the conventional plotting of linear or Tafel polarization behavior of the anodic and cathodic...
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...
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
... in Fig. 3 . The anode polarization is linear with decade current as predicted by Eq 24 because the overpotential has only a Tafel regime and no mass transfer dependence. On the other hand, the cathode polarization deviates from the Tafel behavior as a result of the effect of the mass transfer...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.mgppis.t60400109
EISBN: 978-1-62708-258-7
... aberration. Metallurgical microscope features such as apochromatic objectives, hyperplane oculars, vertical illuminators, counting reticles, widefield oculars, polarization filters, field diaphragms, interferometers, and tungsten-halogen lamps are explained. The optical system, nosepiece, types of objectives...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140069
EISBN: 978-1-62708-335-5
... 511.0 1.005 513.0 1.020 514.0 1.020 518.0 1.015 520.0 1.040 710.0 1.020 711.0 1.000 712.0 1.010 850.0 0.990 851.0 0.965 852.0 0.985 … … Equations of linear thermal expansion: L t (0 to –320 °F) = L 0 [1 + C (11.74 t – 0.00125 t 2...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140069
EISBN: 978-1-62708-335-5
... 511.0 1.005 513.0 1.020 514.0 1.020 518.0 1.015 520.0 1.040 710.0 1.020 711.0 1.000 712.0 1.010 850.0 0.990 851.0 0.965 852.0 0.985 … … Equations of linear thermal expansion: L t (0 to –320 °F) = L 0 [1 + C (11.74 t – 0.00125 t 2...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230459
EISBN: 978-1-62708-298-3
... pitting potentials as functions of pH and chloride concentration are shown in Fig. 25.12 and 25.13 , where the chloride solutions were deaerated. Note that linear and logarithmic relationships are obtained for the pitting potential as a function of pH and chloride concentration, respectively. Fig...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780115
EISBN: 978-1-62708-281-5
.... This is commonly called the transition zone. Finally, at temperatures above the T g , the modulus continues to drop until the physical integrity of the polymer is lost (a melting process for semicrystalline polymers; complete liquidlike flow above T g for linear, amorphous polymers; or rubberlike...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110485
EISBN: 978-1-62708-247-1
... out-of-phase reflection are collected to form images. One signal is dominated by the capacitance of the tip sample interface and the other signal is dominated by the resistance at the tip-sample interface. For linear samples (e.g., capacitors, resistors) the signals vary with the local permittivity...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110285
EISBN: 978-1-62708-247-1
... operating voltage (Vnom) are measurable. Figure 14 Example of Id vs Vds, step Vgs curves for an n-channel transistor. The Linear region and Saturation region of operation for the transistor can be evaluated. Figure 15 Example of Id vs Vds, step Vgs curves for an p-channel transistor. The...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910331
EISBN: 978-1-62708-250-1
... resistance and linear polarization methods. The former determines corrosion trends with time, and the latter determines an instantaneous corrosion rate. Ultrasonic thickness measurement. This is a useful monitoring tool, especially when baseline readings are taken at selected locations before the...
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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090271
EISBN: 978-1-62708-266-2
... Abstract Titanium alloys are generally resistant to stress-corrosion cracking (SCC), but under certain conditions, the potential for problems exists. This chapter identifies the types of service environments where titanium alloys have exhibited signs of SCC. It begins by describing the nominal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480265
EISBN: 978-1-62708-318-8
... describes several welding processes, including arc welding, resistance welding, and friction stir welding, and addresses related issues such as welding defects, quality control, and stress relieving. The chapter also covers mechanical fastening techniques along with adhesive bonding and brazing...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030215
EISBN: 978-1-62708-282-2
... of corrosion. Other on-stream corrosion monitoring techniques that are used in the petroleum and chemical-process industries are: Electrochemical techniques: includes monitors that use electrical resistance and linear polarization methods ( Ref 21 ). The former technique determines...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550385
EISBN: 978-1-62708-307-2
... composites exhibit a linear decrease of both tensile strength and modulus when tested at elevated temperatures in air. The effects of temperature and moisture on a Kevlar 49/epoxy woven cloth are shown in Fig. 8.19 . Aramid fiber has an equilibrium moisture content that is determined by the relative...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820203
EISBN: 978-1-62708-339-3
... frequently to monitor in-service corrosion because of the simplicity and accuracy of the technique. Electrochemical techniques such as linear polarization resistance and electrochemical noise have moved from the laboratory to the processing plant and beyond to help with the detection of general and localized...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910427
EISBN: 978-1-62708-250-1
... corrosion-monitoring techniques is listed in Table 11 , and the characteristics of these techniques are identified in Table 12 . Table 11 Instrumentation for corrosion monitoring Method Measures or detects Notes Use Linear polarization (polarization resistance) Corrosion rate is...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940233
EISBN: 978-1-62708-302-7
... polarization resistance, R p . It has dimensions of resistance times area (i.e., total specimen area) (e.g., ohms-m 2 ). As seen by Eq 6.25 and indicated in Fig. 6.12 , R p is the slope of the experimental E versus i ex curve at E corr . The curve tends to be linear near E corr , which facilitates...