Investigation of Mg/Al alloy sacrificial anode corrosion with Scanning Electrochemical Microscopy

Nagy, Géza

doi:10.3311/ppch.2164

Per. Pol. Chem. Eng.

2013

DOI: 10.3311/ppch.2164

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Investigation of Mg/Al alloy sacrificial anode corrosion with Scanning Electrochemical Microscopy

Géza Nagy¹

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Cited by 4 publications

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“…Previously we demonstrated how imaging distortion can be avoided by using solid contact electrodes, which have smaller resistance, allowing higher scan rate while maintaining image quality 8,9. Another way is to optimize scanning algorithms for a specific target geometry 10.…”

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confidence: 99%

Deconvolution in Potentiometric SECM

Nagy

2015

Electroanalysis

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One of the main limitations of potentiometric scanning electrochemical microscopy (SECM) is the large RC time constant, and therefore long response time of the cell. A relatively long equilibration interval has to be allowed before sampling at each data acquisition point to reach equilibrium potential, and avoid image distortion. In this paper, we present a method to get high‐quality, low distortion images, without increasing scan time. The convolution function causing the distortion can be expressed from the response function of the potentiometric cell. A model system was studied with high scan rate, then the image was deconvoluted using the inverse of the potentiometric response function to calculate the equilibrium potential for each data acquisition point from the respective observed values.

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mentioning

confidence: 99%

Deconvolution in Potentiometric SECM

Nagy

2015

Electroanalysis

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Evaluating the corrosion behaviour of Magnesium alloy in simulated biological fluid by using SECM to detect hydrogen evolution

Jamali

Moulton

Tallman

et al. 2015

Electrochimica Acta

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Evaluation of the Corrosion of AZ31 Magnesium Alloy Used as Sacrificial Anode for Cathodic Protection of Hot-Water Tank Storage Containing Chloride

Zidane¹

2018

International Journal of Electrochemical Science

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Corrosion resistance of AZ31 magnesium alloy was evaluated in aqueous chloride-containing solutions. Combined weight loss and electrochemical data indicate that corrosion rate of magnesium alloy increased for greater NaCl concentrations and higher temperatures. Corrosion is characterized by the formation of precipitates, that present the distinctive XRD patterns corresponding to crystalline phases of Mg(OH) 2 , accompanied by H 2 evolution, these processes leading to pH increases in the solution. Retrieved samples show a film of corrosion products distributed around cracks on the bare metal surface, and the subsequent development of large pits that prevent the material from attaining passive protection.

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Investigation of Mg/Al alloy sacrificial anode corrosion with Scanning Electrochemical Microscopy

Cited by 4 publications

References 8 publications

Deconvolution in Potentiometric SECM

Deconvolution in Potentiometric SECM

Evaluating the corrosion behaviour of Magnesium alloy in simulated biological fluid by using SECM to detect hydrogen evolution

Evaluation of the Corrosion of AZ31 Magnesium Alloy Used as Sacrificial Anode for Cathodic Protection of Hot-Water Tank Storage Containing Chloride

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