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polarization curve

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Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001820
EISBN: 978-1-62708-241-9
... and analyze the potentiodynamic polarization curves. NACE TM0177 test solution “A” was used in electrochemical tests. After pouring the solution and sealing the cell, the cell was deaerated by argon for 1 h to eliminate any oxygen interference with the electrochemical reaction. After purging, H2S was bubbled...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001560
EISBN: 978-1-62708-217-4
.... Corrosion rates were determined using anodic Tafel extrapolation, cathodic Tafel extrapolation, and the linear polarization technique. For the corrosion rates calculated using linear polarization, Tafel slopes obtained from experimental data were used. The polarization curves did not have linear regions...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003548
EISBN: 978-1-62708-180-1
... the cathode (that is, in the direction of anodic polarization) such that appreciable accelerated galvanic corrosion occurs. Polarization measurements on the members of a galvanic couple can provide precise information concerning their behavior. The polarization curves and the mixed potential...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006783
EISBN: 978-1-62708-295-2
...) such that appreciable accelerated galvanic corrosion occurs. Polarization measurements on the members of a galvanic couple can provide precise information concerning their behavior. The polarization curves and the mixed potential for the galvanically coupled metals in a particular environment can be used...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003549
EISBN: 978-1-62708-180-1
... methods for electrochemical testing are published in Ref 2 . As the name suggests, in the controlled-current test method, the current is controlled and the resulting corrosion potential is measured. Polarization curves are generated. Galvanostatic and galvanodynamic polarization measurements are used...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001525
EISBN: 978-1-62708-220-4
... polarization test curve of the sample that had not been steam dried is shown in Fig. 3 . The corrosion rate was found to be 67 mils (170 µm) per year, and the shape of the curve indicates that no stable passive film had developed on the surface. The test curve from the sample that had been steam dried...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001769
EISBN: 978-1-62708-241-9
... current between control and bacterial inoculated system. Fig. 8 Polarization behavior for mild steel in the absence and the presence of calcium precipitating bacteria (anodic and cathodic curve) in cooling water system Impedance spectroscopy analysis is presented in Fig. 9 and Table 4...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006782
EISBN: 978-1-62708-295-2
...-current testing, current is controlled, the resulting corrosion potential is measured, and polarization curves are generated. Galvanostatic and galvanodynamic polarization measurements are used to plot anodic and cathodic polarization curves. The assumption that corrosion rates remain constant with time...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003567
EISBN: 978-1-62708-180-1
... is to adapt laboratory tests to field situations. Electrodes were mounted at the ends of mill liner bolts, and polarization curves of the media material electrodes were obtained by a telemetry-radio system ( Ref 32 ). Although the data were often noisy, correlations with laboratory corrosive wear tests were...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001517
EISBN: 978-1-62708-217-4
... interstices. Additionally, polarized lighting revealed that the anomalous areas were of a different density than the surrounding resin. Chemical methods were utilized to analyze the anomaly. Fourier Transform Infrared (FTIR) spectroscopy was conducted on resin obtained from the top ply and resin obtained from...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003524
EISBN: 978-1-62708-180-1
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001004
EISBN: 978-1-62708-229-7
... the extent of grain boundary phosphorus segregation exhibited a good relationship with ambient temperature Charpy data. The electrochemical polarization kinetic reactivation, EPR, approach, however, proved disappointing in that the overlapping scatter in the minimum current density, Ir, for an embrittled...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001797
EISBN: 978-1-62708-241-9
...–90° 90–180° 180–270° 270–360° Name of the curve Double harmonic Double harmonic The cam–follower system parameters Table 2 The cam–follower system parameters Motor Rigid coupling Cam Polar moment of inertia, kg m 2 0.00329 0.339 0.0006 Mass, kg M l = 1.36...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003530
EISBN: 978-1-62708-180-1
... cause failure by yield. An octahedral shear stress criterion provides a mathematically identical expression to the von Mises criterion. Several other criteria have been proposed (e.g., one based on maximum strain). Additionally, some criteria take into account polar behavior (unequal tensile...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006767
EISBN: 978-1-62708-295-2
... based on maximum strain). Additionally, some criteria take into account polar behavior (unequal tensile and compressive failure stresses), anisotropic behavior, and nonconstancy of volume during deformation. The historically early models (Rankine, Tresca, von Mises, and octahedral shear) were...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001819
EISBN: 978-1-62708-180-1
..., suggested that the plate was rather heavily loaded. Morphological comparison and fatigue initiation curves indicated that a local stress concentration of 500 to 600 MPa (72 to 87 ksi) was present. This load would still be below the elastic limit of the cold-worked stainless steel. No fatigue cracks were...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001779
EISBN: 978-1-62708-241-9
... on the surface and to interpret the results of the damages on failure. The level of impurities and the conductivity of feed water from daily records were compared with the prescribed values to find out the corrosivity of the feed water. Corrosion tests by the potentiodynamic polarization method, using AgCl...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001844
EISBN: 978-1-62708-241-9
... cylindrical polar coordinate system [ 4 , 5 ]: σ θ = b 2 + a 2 b 2 − a 2 P ; σ r = − P where P is operational pressure; a and b are inner and outer radius of cylinder, respectively. In this case the hoop tensile tends to produce radial crack...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001578
EISBN: 978-1-62708-233-4
... on the rotor of the synchronous motor. Fifty ounces of weight had to be added along a 30 in. radius on the motor. When this was done, the vibration level on the whole unit returned to normal. This solution was found by using the adage, “When in doubt, add the trial weight to the rotor with the largest polar...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003541
EISBN: 978-1-62708-180-1
... 849 203 van der Waals Ar 7.8 1.8 Cl 2 31 7.4 Hydrogen NH 3 35 8.4 H 2 O 51 12.2 Source: Ref 1 , 2 Fig. 1 Typical stress-strain curve for a fiber, a plastic, and an elastomer Fig. 2 Typical creep and creep rupture behavior of ductile polymers...