Alkaline etching and desmutting of aluminium alloy: The behaviour of Mg2Si particles

Zelong Jin; Changrun Cai; Teruo Hashimoto; Yudie Yuan; Daehoon Kang; John Hunter; Xiaorong Zhou

doi:10.1016/j.jallcom.2020.155834

Alkaline etching and desmutting of aluminium alloy: The behaviour of Mg2Si particles

Zelong Jin, Changrun Cai, Teruo Hashimoto, Yudie Yuan, Daehoon Kang, John Hunter, Xiaorong Zhou

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

Abstract

In the present study, the behaviour of coarse constituent Mg2Si particles during alkaline etching and desmutting of AA5052 aluminium alloy is investigated by monitoring the morphological and compositional evolution of the particles using quasi in-situ electron microscopy. An etching product film, consisting of Mg(OH)2, and SiO2·xH2O sublayers, is formed on particle surface during alkaline etching, which renders the particles inert. During desmutting in nitric acid, the etching product film is dissolved and dealloying of Mg occurs rapidly, resulting in Si-rich remnant. However, the population density of Si-rich remnant on alloy surface is similar to that of the initial Mg2Si particles.

Original language	English
Pages (from-to)	155834
Journal	Journal of Alloys and Compounds
Early online date	30 May 2020
DOIs	https://doi.org/10.1016/j.jallcom.2020.155834
Publication status	Published - 2020

Keywords

Aluminium alloy
Mg2Si
Dealloying
Etching
Desmutting

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10.1016/j.jallcom.2020.155834Licence: CC BY

https://linkinghub.elsevier.com/retrieve/pii/S0925838820321988

LightForm: Embedding Materials Engineering in Manufacturing with Light Alloys
Prangnell, P. (PI), Curioni, M. (CoI), Haigh, S. (CoI), Quinta Da Fonseca, J. (CoI), Robson, J. (CoI), Shanthraj, P. (CoI) & Zhou, X. (CoI)
1/10/17 → 18/10/23
Project: Research
Future Liquid Metal Engineering Hub
Zhou, X. (PI)
1/11/15 → 31/10/23
Project: Research

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title = "Alkaline etching and desmutting of aluminium alloy: The behaviour of Mg2Si particles",

abstract = "In the present study, the behaviour of coarse constituent Mg2Si particles during alkaline etching and desmutting of AA5052 aluminium alloy is investigated by monitoring the morphological and compositional evolution of the particles using quasi in-situ electron microscopy. An etching product film, consisting of Mg(OH)2, and SiO2·xH2O sublayers, is formed on particle surface during alkaline etching, which renders the particles inert. During desmutting in nitric acid, the etching product film is dissolved and dealloying of Mg occurs rapidly, resulting in Si-rich remnant. However, the population density of Si-rich remnant on alloy surface is similar to that of the initial Mg2Si particles.",

keywords = "Aluminium alloy, Mg2Si, Dealloying, Etching, Desmutting",

author = "Zelong Jin and Changrun Cai and Teruo Hashimoto and Yudie Yuan and Daehoon Kang and John Hunter and Xiaorong Zhou",

year = "2020",

doi = "10.1016/j.jallcom.2020.155834",

language = "English",

pages = "155834",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier BV",

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TY - JOUR

T1 - Alkaline etching and desmutting of aluminium alloy: The behaviour of Mg2Si particles

AU - Jin, Zelong

AU - Cai, Changrun

AU - Hashimoto, Teruo

AU - Yuan, Yudie

AU - Kang, Daehoon

AU - Hunter, John

AU - Zhou, Xiaorong

PY - 2020

Y1 - 2020

N2 - In the present study, the behaviour of coarse constituent Mg2Si particles during alkaline etching and desmutting of AA5052 aluminium alloy is investigated by monitoring the morphological and compositional evolution of the particles using quasi in-situ electron microscopy. An etching product film, consisting of Mg(OH)2, and SiO2·xH2O sublayers, is formed on particle surface during alkaline etching, which renders the particles inert. During desmutting in nitric acid, the etching product film is dissolved and dealloying of Mg occurs rapidly, resulting in Si-rich remnant. However, the population density of Si-rich remnant on alloy surface is similar to that of the initial Mg2Si particles.

AB - In the present study, the behaviour of coarse constituent Mg2Si particles during alkaline etching and desmutting of AA5052 aluminium alloy is investigated by monitoring the morphological and compositional evolution of the particles using quasi in-situ electron microscopy. An etching product film, consisting of Mg(OH)2, and SiO2·xH2O sublayers, is formed on particle surface during alkaline etching, which renders the particles inert. During desmutting in nitric acid, the etching product film is dissolved and dealloying of Mg occurs rapidly, resulting in Si-rich remnant. However, the population density of Si-rich remnant on alloy surface is similar to that of the initial Mg2Si particles.

KW - Aluminium alloy

KW - Mg2Si

KW - Dealloying

KW - Etching

KW - Desmutting

U2 - 10.1016/j.jallcom.2020.155834

DO - 10.1016/j.jallcom.2020.155834

M3 - Article

SN - 0925-8388

SP - 155834

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Alkaline etching and desmutting of aluminium alloy: The behaviour of Mg2Si particles

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Keywords

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Future Liquid Metal Engineering Hub

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