Numerical Investigation of Micro-Galvanic Corrosion in Mg Alloys: Role of the Cathodic Intermetallic Phase Size and Spatial Distributions

V. K. Beura; P. Garg; V. V. Joshi; K. N. Solanki

doi:10.1007/978-3-030-36647-6_34

Numerical Investigation of Micro-Galvanic Corrosion in Mg Alloys: Role of the Cathodic Intermetallic Phase Size and Spatial Distributions

V. K. Beura
, P. Garg
, V. V. Joshi
, K. N. Solanki

Engineering of Matter, Transport and Energy, School for (IAFSE-SEMTE)

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

16 Scopus citations

Abstract

Magnesium alloys are of increasing interest in structural applications due to their low-density, moderate specific strength and stiffness, recyclability, and high damping among other properties. However, the wide-scale applicability of magnesium alloys in structural applications has been limited due to many factors including its poor corrosion resistance. In this work, a numerical investigation to simulate the micro-galvanic corrosion behavior was performed to examine the influence of the size and distribution of cathodic intermetallic phase (β–Mg₁₇Al₁₂) in a Mg matrix. The ratio of cathodic to anodic surface area was kept constant in each simulation condition to understand the effect of size and spacing distributions. In general, fragmentation of a larger intermetallic particle into smaller ones was determined to enhance the localized current density. However, the uniform distribution rather than clustered or non-uniform distribution of this small intermetallic phase throughout the matrix was found to reduce the overall dissolution current density and hence, pitting corrosion severity.

Original language	English (US)
Title of host publication	Magnesium Technology 2020
Editors	J. Brian Jordon, Victoria Miller, Vineet V. Joshi, Neale R. Neelameggham
Publisher	Springer
Pages	217-223
Number of pages	7
ISBN (Print)	9783030366469
DOIs	https://doi.org/10.1007/978-3-030-36647-6_34
State	Published - 2020
Event	Magnesium Technology Symposium held at the 149th Annual Meeting and Exhibition, TMS 2020 - San Diego, United States Duration: Feb 23 2020 → Feb 27 2020

Publication series

Name	Minerals, Metals and Materials Series

Conference

Conference	Magnesium Technology Symposium held at the 149th Annual Meeting and Exhibition, TMS 2020
Country/Territory	United States
City	San Diego
Period	2/23/20 → 2/27/20

Keywords

Cathodic particles
Fragmentation
Localized corrosion
Numerical simulation

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Energy Engineering and Power Technology
Mechanics of Materials
Metals and Alloys
Materials Chemistry

Access to Document

10.1007/978-3-030-36647-6_34

Cite this

Beura, V. K., Garg, P., Joshi, V. V., & Solanki, K. N. (2020). Numerical Investigation of Micro-Galvanic Corrosion in Mg Alloys: Role of the Cathodic Intermetallic Phase Size and Spatial Distributions. In J. B. Jordon, V. Miller, V. V. Joshi, & N. R. Neelameggham (Eds.), Magnesium Technology 2020 (pp. 217-223). (Minerals, Metals and Materials Series). Springer. https://doi.org/10.1007/978-3-030-36647-6_34

Numerical Investigation of Micro-Galvanic Corrosion in Mg Alloys: Role of the Cathodic Intermetallic Phase Size and Spatial Distributions. / Beura, V. K.; Garg, P.; Joshi, V. V. et al.
Magnesium Technology 2020. ed. / J. Brian Jordon; Victoria Miller; Vineet V. Joshi; Neale R. Neelameggham. Springer, 2020. p. 217-223 (Minerals, Metals and Materials Series).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Beura, VK, Garg, P, Joshi, VV & Solanki, KN 2020, Numerical Investigation of Micro-Galvanic Corrosion in Mg Alloys: Role of the Cathodic Intermetallic Phase Size and Spatial Distributions. in JB Jordon, V Miller, VV Joshi & NR Neelameggham (eds), Magnesium Technology 2020. Minerals, Metals and Materials Series, Springer, pp. 217-223, Magnesium Technology Symposium held at the 149th Annual Meeting and Exhibition, TMS 2020, San Diego, United States, 2/23/20. https://doi.org/10.1007/978-3-030-36647-6_34

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abstract = "Magnesium alloys are of increasing interest in structural applications due to their low-density, moderate specific strength and stiffness, recyclability, and high damping among other properties. However, the wide-scale applicability of magnesium alloys in structural applications has been limited due to many factors including its poor corrosion resistance. In this work, a numerical investigation to simulate the micro-galvanic corrosion behavior was performed to examine the influence of the size and distribution of cathodic intermetallic phase (β–Mg17Al12) in a Mg matrix. The ratio of cathodic to anodic surface area was kept constant in each simulation condition to understand the effect of size and spacing distributions. In general, fragmentation of a larger intermetallic particle into smaller ones was determined to enhance the localized current density. However, the uniform distribution rather than clustered or non-uniform distribution of this small intermetallic phase throughout the matrix was found to reduce the overall dissolution current density and hence, pitting corrosion severity.",

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note = "Funding Information: The authors would like to thank Pacific Northwest National Laboratory and the Office of Naval Research (N000141110793) for their financial assistance. Funding Information: Acknowledgements The authors would like to thank Pacific North-west National Laboratory and the Office of Naval Research (N000141110793) for their financial assistance. Publisher Copyright: {\textcopyright} 2020, The Minerals, Metals \& Materials Society.; Magnesium Technology Symposium held at the 149th Annual Meeting and Exhibition, TMS 2020 ; Conference date: 23-02-2020 Through 27-02-2020",

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PY - 2020

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N2 - Magnesium alloys are of increasing interest in structural applications due to their low-density, moderate specific strength and stiffness, recyclability, and high damping among other properties. However, the wide-scale applicability of magnesium alloys in structural applications has been limited due to many factors including its poor corrosion resistance. In this work, a numerical investigation to simulate the micro-galvanic corrosion behavior was performed to examine the influence of the size and distribution of cathodic intermetallic phase (β–Mg17Al12) in a Mg matrix. The ratio of cathodic to anodic surface area was kept constant in each simulation condition to understand the effect of size and spacing distributions. In general, fragmentation of a larger intermetallic particle into smaller ones was determined to enhance the localized current density. However, the uniform distribution rather than clustered or non-uniform distribution of this small intermetallic phase throughout the matrix was found to reduce the overall dissolution current density and hence, pitting corrosion severity.

AB - Magnesium alloys are of increasing interest in structural applications due to their low-density, moderate specific strength and stiffness, recyclability, and high damping among other properties. However, the wide-scale applicability of magnesium alloys in structural applications has been limited due to many factors including its poor corrosion resistance. In this work, a numerical investigation to simulate the micro-galvanic corrosion behavior was performed to examine the influence of the size and distribution of cathodic intermetallic phase (β–Mg17Al12) in a Mg matrix. The ratio of cathodic to anodic surface area was kept constant in each simulation condition to understand the effect of size and spacing distributions. In general, fragmentation of a larger intermetallic particle into smaller ones was determined to enhance the localized current density. However, the uniform distribution rather than clustered or non-uniform distribution of this small intermetallic phase throughout the matrix was found to reduce the overall dissolution current density and hence, pitting corrosion severity.

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KW - Fragmentation

KW - Localized corrosion

KW - Numerical simulation

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ER -

Numerical Investigation of Micro-Galvanic Corrosion in Mg Alloys: Role of the Cathodic Intermetallic Phase Size and Spatial Distributions

Abstract

Publication series

Conference

Keywords

ASJC Scopus subject areas

Access to Document

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