Electron microscopy analysis of grain boundaries and intergranular corrosion in aged Al-Mg-Si alloy doped with 0.05 wt% Cu

Emad H. Bartawi; Oleg V. Mishin; Ghada Shaban; Jan H. Nordlien; Rajan Ambat

doi:10.1016/j.corsci.2022.110758

Electron microscopy analysis of grain boundaries and intergranular corrosion in aged Al-Mg-Si alloy doped with 0.05 wt% Cu

Emad H. Bartawi^*, Oleg V. Mishin, Ghada Shaban, Jan H. Nordlien, Rajan Ambat

^*Corresponding author for this work

Norsk Hydro

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Abstract

The microstructure and intergranular corrosion have been studied in an extruded and aged Al-Mg-Si alloy doped with 0.05 wt% Cu after immersing the material in an acidified salt solution. Intergranular corrosion takes place in this alloy despite the low Cu content. Electron microscopy analysis of the surface exposed to the corrosive environment does not reveal any significant difference in the fraction of corroded random and coincident site lattice high angle boundaries. Low angle boundaries with misorientations below 10° are found to be consistently more resistant to intergranular corrosion than any other boundary type.

Original language	English
Article number	110758
Journal	Corrosion Science
Volume	209
Number of pages	10
ISSN	0010-938X
DOIs	https://doi.org/10.1016/j.corsci.2022.110758
Publication status	Published - 2022

Keywords

Alloy
Aluminium
Intergranular corrosion
SEM
STEM
TEM

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title = "Electron microscopy analysis of grain boundaries and intergranular corrosion in aged Al-Mg-Si alloy doped with 0.05 wt% Cu",

abstract = "The microstructure and intergranular corrosion have been studied in an extruded and aged Al-Mg-Si alloy doped with 0.05 wt% Cu after immersing the material in an acidified salt solution. Intergranular corrosion takes place in this alloy despite the low Cu content. Electron microscopy analysis of the surface exposed to the corrosive environment does not reveal any significant difference in the fraction of corroded random and coincident site lattice high angle boundaries. Low angle boundaries with misorientations below 10° are found to be consistently more resistant to intergranular corrosion than any other boundary type.",

keywords = "Alloy, Aluminium, Intergranular corrosion, SEM, STEM, TEM",

author = "Bartawi, {Emad H.} and Mishin, {Oleg V.} and Ghada Shaban and Nordlien, {Jan H.} and Rajan Ambat",

year = "2022",

doi = "10.1016/j.corsci.2022.110758",

language = "English",

volume = "209",

journal = "Corrosion Science",

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TY - JOUR

T1 - Electron microscopy analysis of grain boundaries and intergranular corrosion in aged Al-Mg-Si alloy doped with 0.05 wt% Cu

AU - Bartawi, Emad H.

AU - Mishin, Oleg V.

AU - Shaban, Ghada

AU - Nordlien, Jan H.

AU - Ambat, Rajan

PY - 2022

Y1 - 2022

N2 - The microstructure and intergranular corrosion have been studied in an extruded and aged Al-Mg-Si alloy doped with 0.05 wt% Cu after immersing the material in an acidified salt solution. Intergranular corrosion takes place in this alloy despite the low Cu content. Electron microscopy analysis of the surface exposed to the corrosive environment does not reveal any significant difference in the fraction of corroded random and coincident site lattice high angle boundaries. Low angle boundaries with misorientations below 10° are found to be consistently more resistant to intergranular corrosion than any other boundary type.

AB - The microstructure and intergranular corrosion have been studied in an extruded and aged Al-Mg-Si alloy doped with 0.05 wt% Cu after immersing the material in an acidified salt solution. Intergranular corrosion takes place in this alloy despite the low Cu content. Electron microscopy analysis of the surface exposed to the corrosive environment does not reveal any significant difference in the fraction of corroded random and coincident site lattice high angle boundaries. Low angle boundaries with misorientations below 10° are found to be consistently more resistant to intergranular corrosion than any other boundary type.

KW - Alloy

KW - Aluminium

KW - Intergranular corrosion

KW - SEM

KW - STEM

KW - TEM

U2 - 10.1016/j.corsci.2022.110758

DO - 10.1016/j.corsci.2022.110758

M3 - Journal article

SN - 0010-938X

VL - 209

JO - Corrosion Science

JF - Corrosion Science

M1 - 110758

ER -

Electron microscopy analysis of grain boundaries and intergranular corrosion in aged Al-Mg-Si alloy doped with 0.05 wt% Cu

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