Investigation of Anodic Behavior of Nickel in H2SO4 Solutions Using Galvanostatic Polarization Technique. IV. Initiation and Inhibition of Pitting Corrosion by Cl- ions and Ethoxylated Surfactants

2021 ◽  
pp. ArticleID:21087
Author(s):  
S Abd El Wanees ◽  
Keyword(s):  
Pitting Corrosion ◽  
Anodic Behavior ◽  
Galvanostatic Polarization ◽  
Polarization Technique ◽  
Ethoxylated Surfactants

New aspects of the galvanokinetic polarization technique for pitting corrosion studies

1993 ◽  
Vol 34 (10) ◽  
pp. 1715-1721 ◽  
Author(s):  
Q. Le Xuan ◽  
J. Kraiem ◽  
K. Vu Quang
Keyword(s):  
Pitting Corrosion ◽  
Corrosion Studies ◽  
Polarization Technique

Effect of  SO 2 and pH on the Anodic Behavior and Pitting Corrosion of Alloy 600

1982 ◽  
Vol 129 (10) ◽  
pp. 2194-2200 ◽  
Author(s):  
Ph. Berge ◽  
V. Jovancicevic ◽  
D. Noel ◽  
P. Saint‐Paul
Keyword(s):  
Pitting Corrosion ◽  
Alloy 600 ◽  
Anodic Behavior

Microstructural Aspects of the Ionic Transport Properties of Strontium-Substituted Lanthanum Cobaltites

2002 ◽  
Vol 756 ◽  
Author(s):  
W. Sitte ◽  
E. Bucher ◽  
W. Preis ◽  
I. Papst ◽  
W. Grogger ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Charge Carriers ◽  
Log P ◽  
Conductivity Measurements ◽  
Ionic Charge ◽  
Galvanostatic Polarization ◽  
Vacancy Ordering ◽  
Polarization Technique ◽  
Electron Microscopical ◽  
Distinct Maximum

ABSTRACTThe ionic conductivity and microstructure of selected compositions of the solid solution La1-xSrxCoO3-δ (LSC) were examined with respect to possible vacancy ordering phenomena. Homogeneous samples of LSC were prepared by the glycine nitrate process. The ionic conductivity was obtained as a function of the oxygen partial pressure (-3.5 ≤ log[p(O2)/atm] ≤ 0.5) using a recently developed galvanostatic polarization technique. At 825°C the p(O2)-dependence of the ionic conductivity of La1-xSrxCoO3-° (x = 0.4 and 0.6) shows a distinct maximum. Although this behavior has yet to be explained unambiguously it is indicative of decreasing mobility of ionic charge carriers, e. g. due to cooperative vacancy ordering. From the temperature dependence of the ionic conductivity of La1-xSrxCoO3-° (x = 0.6) activation energies at constant nonstoichiometry (0.20 ≤ ° ≤ 0.28) were obtained. As vacancy association and microstructure are presumed to play a significant role we combined the results of ionic conductivity measurements and electron microscopical investigations. HRTEM images revealed a superstructure within microdomains of about 100 nm in size.

scholarly journals EFFECT OF HEAT TREATMENT ON THE CORROSION BEHAVIOR OF AL-10%WT MG ALLOYS

2017 ◽  
Vol 23 (3) ◽  
pp. 264
Author(s):  
Samira Zermane ◽  
Abdelouahed Chala ◽  
Okba Belahssen
Keyword(s):  
Heat Treatment ◽  
Electron Microscope ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Pitting Corrosion ◽  
Electrochemical Behavior ◽  
Electrochemical Impedance ◽  
Electrochemical Techniques ◽  
Corrosion Resistant ◽  
Polarization Technique

<p>In the present investigation, the effect of heat treatment on the electrochemical behavior of Al-10% wt Mg alloy in 3.5% wt NaCl was study by different electrochemical techniques such as, polarization technique (Tafel plot) and electrochemical impedance spectroscopy. It has been shown that, the corrosion resistant of the alloy decreased for the aging at 250 °C for 24 h. However, this latter increased with naturally aging. The SEM (electron microscope) and Energy Dispersive EDS characterization have shown that the alloy with the two treatments of aging became susceptible to the pitting corrosion.</p>

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