Electrochemical characterizations of precipitates formed on zinc in alkaline sulphate solution with increasing pH values

A novel coupling of electrochemical impedance spectroscopy with atomic emission spectroelectrochemistry: Application to the open circuit dissolution of zinc

“…Nevertheless, the results show that the zinc surface is active, consistent with the significant dissolution rate observed at open circuit, which would imply that the oxide film formed under these conditions does not significantly impede the cathodic reaction. This is in agreement with the conclusions of Bonk et al [14]. A variety of different mechanisms and equivalent circuits may be used to explain the appearance of two time constants in the investigated frequency range.…”

“…Electrochemical characterization is highly pertinent as the semiconducting nature of the oxide film ultimately controls the oxygen reduction reaction [12]. The interfacial charge transfer properties may be accessed near the open circuit potential by electrochemical impedance spectroscopy [13][14][15]. The EIS approach however does not yield quantitative information concerning the quantity of oxidized zinc products formed at the interface.…”

Effect of hydrogen carbonate and chloride on zinc corrosion investigated by a scanning flow cell system

“…Since corrosion under environmental conditions is a highly complex and diverse process, many techniques have been utilized to study, simulate and predict the effect of single parameters on the performance of zinc based protective coatings [1][2][3][4]. Under wet conditions, the electrolyte composition represents the most important parameter that determines the corrosion behaviour [3,5]. In particular the (local) pH is decisive for the formation and stability of precipitates that may passivate the surface [5][6][7].…”

“…Under wet conditions, the electrolyte composition represents the most important parameter that determines the corrosion behaviour [3,5]. In particular the (local) pH is decisive for the formation and stability of precipitates that may passivate the surface [5][6][7]. Owing to the amphotheric character of zinc hydroxides (and oxides), these precipitates are stable only in a limited pH range around 9-10 [3,8,9].…”

The impedance‐titrator : A novel setup to perform automated pH‐dependent electrochemical experiments

“…Monitoring of the pH dependent stability by means of impedance spectroscopy for aluminium was chosen as the first example [7]. An active regulation modus is exemplified for the coupled complex formation of various zincate species [8].…”