Practical Corrosion Prediction Using Electrochemical Techniques

Silverman, D. C.

doi:10.1002/9780470872864.ch85

Cited by 42 publications

(41 citation statements)

References 78 publications

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“…Furthermore, in the middle frequency region typical capacitive behavior is observed as the slope of the curve is close to −1 in Figure 5b and the phase angle approaches −90 • in Figure 5c. Finally, the absence of a horizontal amplitude in the low-frequency region of the modulus Bode plots (Figure 5b) is an indication of diffusion and/or adsorption/desorption processes [19,20]. A more detailed explanation of each of the above-mentioned segments and the respective behaviors has been reported previously [5][6][7][8][9].…”

Section: Electrochemical Impedance Spectroscopy (Eis) Measurementssupporting

confidence: 67%

Electrochemical and Surface Analysis of 2-Phenylimidazole Adsorbed on Copper from Chloride Solution

Finšgar

Xhanari

2018

Coatings

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Abstract:The electroanalytical and surface characterization of copper immersed in 3 wt.% NaCl solution containing 1 mM of 2-phenylimidazole (2PhI) is presented. It was proven that 2PhI can be employed as corrosion inhibitor for copper using various electrochemical analyses, such as cyclic voltammetry, chronopotentiometry, electrochemical impedance spectroscopy, and potentiodynamic curve measurements. The adsorption of 2PhI on copper was further analyzed by 3D-profilometry, attenuated total reflectance Fourier transform infrared spectroscopy, contact angle measurements, and scanning electron microscopy equipped with an energy dispersive X-ray spectrometer. This system was therefore comprehensively described by various analytical approaches.

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Section: Electrochemical Impedance Spectroscopy (Eis) Measurementssupporting

confidence: 67%

Electrochemical and Surface Analysis of 2-Phenylimidazole Adsorbed on Copper from Chloride Solution

Finšgar

Xhanari

2018

Coatings

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“…Nevertheless, the reverse anodic scan intersects the forward anodic scan at a potential (E r ) almost equal to the breakdown potential (E b ), as shown in Figure 4a. The closeness of the E r and E b values constitutes further evidence of the high resistance of the alloy to localized corrosion [41].…”

Section: Mechanism Of Corrosionmentioning

confidence: 99%

“…The main concept of this technique is that pitting would occur if the current density of the anodic portion of the return scan is higher than the current density of the forward scan for the same anodic potential [41]. This type of hysteresis is labelled as "negative hysteresis" (More details can be found in [42]).…”

Section: Corrosion Testingmentioning

confidence: 99%

Al-Co Alloys Prepared by Vacuum Arc Melting: Correlating Microstructure Evolution and Aqueous Corrosion Behavior with Co Content

Lekatou

Sfikas

Petsa

et al. 2016

Metals

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Hypereutectic Al-Co alloys of various Co contents (7-20 weight % (wt.%) Co) were prepared by vacuum arc melting, aiming at investigating the influence of the cobalt content on the microstructure and corrosion behavior. Quite uniform and directional microstructures were attained. The obtained microstructures depended on the Co content, ranging from fully eutectic growth (7 wt.% and 10 wt.% Co) to coarse primary Al 9 Co 2 predominance (20 wt.% Co). Co dissolution in Al far exceeded the negligible equilibrium solubility of Co in Al; however, it was hardly uniform. By increasing the cobalt content, the fraction and coarseness of Al 9 Co 2 , the content of Co dissolved in the Al matrix, and the hardness and porosity of the alloy increased. All alloys exhibited similar corrosion behavior in 3.5 wt.% NaCl with high resistance to localized corrosion. Al-7 wt.% Co showed slightly superior corrosion resistance than the other compositions in terms of relatively low corrosion rate, relatively low passivation current density and scarcity of stress corrosion cracking indications. All Al-Co compositions demonstrated substantially higher resistance to localized corrosion than commercially pure Al produced by casting, cold rolling and arc melting. A corrosion mechanism was formulated. Surface films were identified.

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“…According to the works cited by Silverman 13 and to norm ASTM G185 14 , it is accepted that the shear stress on the cylinder wall be given by the equation below: In accordance with the experimental planning, the intention is to change the shear stress of the fluid by varying the roughness ε of the electrode.…”

Section: Hydrodynamic Behaviourmentioning

confidence: 99%