Role of aging time and Cu/Zn additions on the microstructure and intergranular corrosion resistance of 6082 Al-Mg-Si alloy

Emad H. Bartawi; Ghada Shaban; Rajan Ambat

doi:10.1016/j.corsci.2025.113027

Role of aging time and Cu/Zn additions on the microstructure and intergranular corrosion resistance of 6082 Al-Mg-Si alloy

Emad H. Bartawi^*, Ghada Shaban^*, Rajan Ambat

^*Corresponding author for this work

Research output: Contribution to journal › Journal article › Research › peer-review

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Abstract

The influence of aging time (1, 2, 5, and 24 h) and minor additions of Cu (≤ 0.05 wt%), Zn (≤ 0.06 wt%), and Cu/Zn on the microstructure and intergranular corrosion (IGC) resistance of Al-Mg-Si alloy is investigated. Minor Cu or Zn additions negatively affect IGC resistance of these alloys. However, the findings also indicate that a Cu/Zn ratio of approximately 1.54 enhances corrosion resistance across aging conditions, which can be further improved by appropriate heat treatments. Additionally, STEM-EDS analysis indicates that Zn is less detected in grain boundaries (GBs) and intragranular precipitates compared to Cu at identical aging conditions.

Original language	English
Article number	113027
Journal	Corrosion Science
Volume	254
Number of pages	11
ISSN	0010-938X
DOIs	https://doi.org/10.1016/j.corsci.2025.113027
Publication status	Published - 2025

Keywords

6082 Al-Mg-Si alloy
Aging time
Intergranular corrosion
STEM

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title = "Role of aging time and Cu/Zn additions on the microstructure and intergranular corrosion resistance of 6082 Al-Mg-Si alloy",

abstract = "The influence of aging time (1, 2, 5, and 24 h) and minor additions of Cu (≤ 0.05 wt\%), Zn (≤ 0.06 wt\%), and Cu/Zn on the microstructure and intergranular corrosion (IGC) resistance of Al-Mg-Si alloy is investigated. Minor Cu or Zn additions negatively affect IGC resistance of these alloys. However, the findings also indicate that a Cu/Zn ratio of approximately 1.54 enhances corrosion resistance across aging conditions, which can be further improved by appropriate heat treatments. Additionally, STEM-EDS analysis indicates that Zn is less detected in grain boundaries (GBs) and intragranular precipitates compared to Cu at identical aging conditions.",

keywords = "6082 Al-Mg-Si alloy, Aging time, Intergranular corrosion, STEM",

author = "Bartawi, \{Emad H.\} and Ghada Shaban and Rajan Ambat",

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year = "2025",

doi = "10.1016/j.corsci.2025.113027",

language = "English",

volume = "254",

journal = "Corrosion Science",

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TY - JOUR

T1 - Role of aging time and Cu/Zn additions on the microstructure and intergranular corrosion resistance of 6082 Al-Mg-Si alloy

AU - Bartawi, Emad H.

AU - Shaban, Ghada

AU - Ambat, Rajan

PY - 2025

Y1 - 2025

N2 - The influence of aging time (1, 2, 5, and 24 h) and minor additions of Cu (≤ 0.05 wt%), Zn (≤ 0.06 wt%), and Cu/Zn on the microstructure and intergranular corrosion (IGC) resistance of Al-Mg-Si alloy is investigated. Minor Cu or Zn additions negatively affect IGC resistance of these alloys. However, the findings also indicate that a Cu/Zn ratio of approximately 1.54 enhances corrosion resistance across aging conditions, which can be further improved by appropriate heat treatments. Additionally, STEM-EDS analysis indicates that Zn is less detected in grain boundaries (GBs) and intragranular precipitates compared to Cu at identical aging conditions.

AB - The influence of aging time (1, 2, 5, and 24 h) and minor additions of Cu (≤ 0.05 wt%), Zn (≤ 0.06 wt%), and Cu/Zn on the microstructure and intergranular corrosion (IGC) resistance of Al-Mg-Si alloy is investigated. Minor Cu or Zn additions negatively affect IGC resistance of these alloys. However, the findings also indicate that a Cu/Zn ratio of approximately 1.54 enhances corrosion resistance across aging conditions, which can be further improved by appropriate heat treatments. Additionally, STEM-EDS analysis indicates that Zn is less detected in grain boundaries (GBs) and intragranular precipitates compared to Cu at identical aging conditions.

KW - 6082 Al-Mg-Si alloy

KW - Aging time

KW - Intergranular corrosion

KW - STEM

U2 - 10.1016/j.corsci.2025.113027

DO - 10.1016/j.corsci.2025.113027

M3 - Journal article

AN - SCOPUS:105005096160

SN - 0010-938X

VL - 254

JO - Corrosion Science

JF - Corrosion Science

M1 - 113027

ER -

Role of aging time and Cu/Zn additions on the microstructure and intergranular corrosion resistance of 6082 Al-Mg-Si alloy

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