On the corrosion of a high solute Al-Zn-Mg alloy produced by laser powder bed fusion

A. P. Babu; S. Choudhary; J. C. Griffith; A. Huang; N. Birbilis

doi:10.1016/j.corsci.2021.109626

On the corrosion of a high solute Al-Zn-Mg alloy produced by laser powder bed fusion

A. P. Babu, S. Choudhary, J. C. Griffith, A. Huang, N. Birbilis

Materials Science & Engineering

Research output: Contribution to journal › Article › Research › peer-review

10 Citations (Scopus)

Abstract

An additively manufactured aluminium alloy with very high solute content, Al-14Zn-3Mg (wt. %), was studied herein. Compared to wrought AA7075-T6 as a benchmark, Al-14Zn-3Mg revealed a lower rate of corrosion, attributed to its microstructure and solute content. Specifically, the lack of coarse intermetallic particles in the Al-14Zn-3Mg led to reduced cathodic kinetics relative to AA7075-T6. Potentiodynamic polarisation tests and electrochemical impedance spectroscopy analysis was performed, along with XPS studies of the corresponding surface films. The findings herein demonstrate the corrosion behaviour of a new high solute aluminium alloy manufactured in net shape through LPBF.

Original language	English
Article number	109626
Number of pages	16
Journal	Corrosion Science
Volume	189
DOIs	https://doi.org/10.1016/j.corsci.2021.109626
Publication status	Published - 15 Aug 2021

Keywords

A. Aluminium
B. Polarization
C. Anodic dissolution
C. Passive films
C. Pitting corrosion

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10.1016/j.corsci.2021.109626

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title = "On the corrosion of a high solute Al-Zn-Mg alloy produced by laser powder bed fusion",

abstract = "An additively manufactured aluminium alloy with very high solute content, Al-14Zn-3Mg (wt. %), was studied herein. Compared to wrought AA7075-T6 as a benchmark, Al-14Zn-3Mg revealed a lower rate of corrosion, attributed to its microstructure and solute content. Specifically, the lack of coarse intermetallic particles in the Al-14Zn-3Mg led to reduced cathodic kinetics relative to AA7075-T6. Potentiodynamic polarisation tests and electrochemical impedance spectroscopy analysis was performed, along with XPS studies of the corresponding surface films. The findings herein demonstrate the corrosion behaviour of a new high solute aluminium alloy manufactured in net shape through LPBF.",

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author = "Babu, {A. P.} and S. Choudhary and Griffith, {J. C.} and A. Huang and N. Birbilis",

note = "Funding Information: The authors gratefully acknowledge the Monash Centre for Electron Microscopy (MCEM) and Monash X-ray Platform (MXP) . This work was supported by the Monash Graduate Research Scholarship . Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",

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doi = "10.1016/j.corsci.2021.109626",

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AU - Babu, A. P.

AU - Choudhary, S.

AU - Griffith, J. C.

AU - Huang, A.

AU - Birbilis, N.

N1 - Funding Information: The authors gratefully acknowledge the Monash Centre for Electron Microscopy (MCEM) and Monash X-ray Platform (MXP) . This work was supported by the Monash Graduate Research Scholarship . Publisher Copyright: © 2021 Elsevier Ltd Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/8/15

Y1 - 2021/8/15

N2 - An additively manufactured aluminium alloy with very high solute content, Al-14Zn-3Mg (wt. %), was studied herein. Compared to wrought AA7075-T6 as a benchmark, Al-14Zn-3Mg revealed a lower rate of corrosion, attributed to its microstructure and solute content. Specifically, the lack of coarse intermetallic particles in the Al-14Zn-3Mg led to reduced cathodic kinetics relative to AA7075-T6. Potentiodynamic polarisation tests and electrochemical impedance spectroscopy analysis was performed, along with XPS studies of the corresponding surface films. The findings herein demonstrate the corrosion behaviour of a new high solute aluminium alloy manufactured in net shape through LPBF.

AB - An additively manufactured aluminium alloy with very high solute content, Al-14Zn-3Mg (wt. %), was studied herein. Compared to wrought AA7075-T6 as a benchmark, Al-14Zn-3Mg revealed a lower rate of corrosion, attributed to its microstructure and solute content. Specifically, the lack of coarse intermetallic particles in the Al-14Zn-3Mg led to reduced cathodic kinetics relative to AA7075-T6. Potentiodynamic polarisation tests and electrochemical impedance spectroscopy analysis was performed, along with XPS studies of the corresponding surface films. The findings herein demonstrate the corrosion behaviour of a new high solute aluminium alloy manufactured in net shape through LPBF.

KW - A. Aluminium

KW - B. Polarization

KW - C. Anodic dissolution

KW - C. Passive films

KW - C. Pitting corrosion

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DO - 10.1016/j.corsci.2021.109626

M3 - Article

AN - SCOPUS:85108100690

VL - 189

JO - Corrosion Science

JF - Corrosion Science

SN - 0010-938X

M1 - 109626

ER -

On the corrosion of a high solute Al-Zn-Mg alloy produced by laser powder bed fusion

Abstract

Keywords

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Centre for Electron Microscopy (MCEM)

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