Electrochemical properties of intermetallic phases and common impurity elements in magnesium alloys

A. D. Südholz; N. T. Kirkland; R. G. Buchheit; N. Birbilis

doi:10.1149/1.3523229

Electrochemical properties of intermetallic phases and common impurity elements in magnesium alloys

A. D. Südholz, N. T. Kirkland, R. G. Buchheit, N. Birbilis

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229 Scopus citations

Abstract

The electrochemical properties of the key intermetallic particles that form in commercial Mg alloys are presented. Results were collected via microcapillary electrochemical testing upon bulk intermetallic analogs in dilute chloride solution. The intermetallics investigated were Mg₁₇ Al ₁₂, Mg₂ Al₃, Mg₂ Ca, Mg₁₂ Ce, Mg₁₂ La, Mg₃ Nd, Mg₂ Si, Mg₂₄ Y₅, and MgZn₂. It was found that the intermetallic phases, with the exception of Mg₂ Ca, were more noble than Mg, supporting increased levels of cathodic kinetics; however, the variation in electrochemical response between intermetallics was large in terms of corrosion potential, presence of a passive window, and currents sustained over a range of potentials.

Original language	English
Pages (from-to)	C5-C7
Journal	Electrochemical and Solid-State Letters
Volume	14
Issue number	2
DOIs	https://doi.org/10.1149/1.3523229
State	Published - 2011

ASJC Scopus subject areas

General Chemical Engineering
General Materials Science
Physical and Theoretical Chemistry
Electrochemistry
Electrical and Electronic Engineering

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abstract = "The electrochemical properties of the key intermetallic particles that form in commercial Mg alloys are presented. Results were collected via microcapillary electrochemical testing upon bulk intermetallic analogs in dilute chloride solution. The intermetallics investigated were Mg17 Al 12, Mg2 Al3, Mg2 Ca, Mg12 Ce, Mg12 La, Mg3 Nd, Mg2 Si, Mg24 Y5, and MgZn2. It was found that the intermetallic phases, with the exception of Mg2 Ca, were more noble than Mg, supporting increased levels of cathodic kinetics; however, the variation in electrochemical response between intermetallics was large in terms of corrosion potential, presence of a passive window, and currents sustained over a range of potentials.",

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T1 - Electrochemical properties of intermetallic phases and common impurity elements in magnesium alloys

AU - Südholz, A. D.

AU - Kirkland, N. T.

AU - Buchheit, R. G.

AU - Birbilis, N.

PY - 2011

Y1 - 2011

N2 - The electrochemical properties of the key intermetallic particles that form in commercial Mg alloys are presented. Results were collected via microcapillary electrochemical testing upon bulk intermetallic analogs in dilute chloride solution. The intermetallics investigated were Mg17 Al 12, Mg2 Al3, Mg2 Ca, Mg12 Ce, Mg12 La, Mg3 Nd, Mg2 Si, Mg24 Y5, and MgZn2. It was found that the intermetallic phases, with the exception of Mg2 Ca, were more noble than Mg, supporting increased levels of cathodic kinetics; however, the variation in electrochemical response between intermetallics was large in terms of corrosion potential, presence of a passive window, and currents sustained over a range of potentials.

AB - The electrochemical properties of the key intermetallic particles that form in commercial Mg alloys are presented. Results were collected via microcapillary electrochemical testing upon bulk intermetallic analogs in dilute chloride solution. The intermetallics investigated were Mg17 Al 12, Mg2 Al3, Mg2 Ca, Mg12 Ce, Mg12 La, Mg3 Nd, Mg2 Si, Mg24 Y5, and MgZn2. It was found that the intermetallic phases, with the exception of Mg2 Ca, were more noble than Mg, supporting increased levels of cathodic kinetics; however, the variation in electrochemical response between intermetallics was large in terms of corrosion potential, presence of a passive window, and currents sustained over a range of potentials.

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JO - Electrochemical and Solid-State Letters

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Electrochemical properties of intermetallic phases and common impurity elements in magnesium alloys

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