Characterization of Localized Corrosion in an Al-Cu-Li Alloy

Chen Luo; Xinxin Zhang; Xiaorong Zhou; Zhihua Sun; Xiaoyun Zhang; Zhihui Tang; Feng Lu; George E. Thompson

doi:10.1007/s11665-016-2010-y

Characterization of Localized Corrosion in an Al-Cu-Li Alloy

Chen Luo^*, Xinxin Zhang, Xiaorong Zhou, Zhihua Sun, Xiaoyun Zhang, Zhihui Tang, Feng Lu, George E. Thompson

^*Corresponding author for this work

Beijing Institute of Aeronautical Materials

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

Abstract

Corrosion behaviors of recently developed 2A97-T6 aluminum-copper-lithium alloy in sodium chloride solution are investigated using scanning electron and transmission electron microscopies in conjunction with electron backscatter diffraction. It has been found that corrosion product rings were established on the alloy surface as early as 5 min during immersion in sodium chloride solution. Meanwhile, hydrogen continuously evolved from within the rings. Pitting corrosion is evident with crystallographic dependant corrosion channel facets mainly parallel to {100} planes. Non-uniform distribution of misorientation in the 2A97 aluminum alloy results in a portion of grains of relatively high stored energy. Such grains were preferentially attacked, serving as local anodes, during the development of crystallographic pitting.

Original language	English
Pages (from-to)	1811-1819
Number of pages	9
Journal	Journal of Materials Engineering and Performance
Volume	25
Issue number	5
Early online date	30 Mar 2016
DOIs	https://doi.org/10.1007/s11665-016-2010-y
Publication status	Published - 1 May 2016

Keywords

aluminum-copper-lithium alloy
corrosion product
crystallographic orientation
grain stored energy
intermetallic particle
localized corrosion

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10.1007/s11665-016-2010-y

Cite this

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title = "Characterization of Localized Corrosion in an Al-Cu-Li Alloy",

abstract = "Corrosion behaviors of recently developed 2A97-T6 aluminum-copper-lithium alloy in sodium chloride solution are investigated using scanning electron and transmission electron microscopies in conjunction with electron backscatter diffraction. It has been found that corrosion product rings were established on the alloy surface as early as 5 min during immersion in sodium chloride solution. Meanwhile, hydrogen continuously evolved from within the rings. Pitting corrosion is evident with crystallographic dependant corrosion channel facets mainly parallel to {100} planes. Non-uniform distribution of misorientation in the 2A97 aluminum alloy results in a portion of grains of relatively high stored energy. Such grains were preferentially attacked, serving as local anodes, during the development of crystallographic pitting.",

keywords = "aluminum-copper-lithium alloy, corrosion product, crystallographic orientation, grain stored energy, intermetallic particle, localized corrosion",

author = "Chen Luo and Xinxin Zhang and Xiaorong Zhou and Zhihua Sun and Xiaoyun Zhang and Zhihui Tang and Feng Lu and Thompson, {George E.}",

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doi = "10.1007/s11665-016-2010-y",

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TY - JOUR

T1 - Characterization of Localized Corrosion in an Al-Cu-Li Alloy

AU - Luo, Chen

AU - Zhang, Xinxin

AU - Zhou, Xiaorong

AU - Sun, Zhihua

AU - Zhang, Xiaoyun

AU - Tang, Zhihui

AU - Lu, Feng

AU - Thompson, George E.

PY - 2016/5/1

Y1 - 2016/5/1

N2 - Corrosion behaviors of recently developed 2A97-T6 aluminum-copper-lithium alloy in sodium chloride solution are investigated using scanning electron and transmission electron microscopies in conjunction with electron backscatter diffraction. It has been found that corrosion product rings were established on the alloy surface as early as 5 min during immersion in sodium chloride solution. Meanwhile, hydrogen continuously evolved from within the rings. Pitting corrosion is evident with crystallographic dependant corrosion channel facets mainly parallel to {100} planes. Non-uniform distribution of misorientation in the 2A97 aluminum alloy results in a portion of grains of relatively high stored energy. Such grains were preferentially attacked, serving as local anodes, during the development of crystallographic pitting.

AB - Corrosion behaviors of recently developed 2A97-T6 aluminum-copper-lithium alloy in sodium chloride solution are investigated using scanning electron and transmission electron microscopies in conjunction with electron backscatter diffraction. It has been found that corrosion product rings were established on the alloy surface as early as 5 min during immersion in sodium chloride solution. Meanwhile, hydrogen continuously evolved from within the rings. Pitting corrosion is evident with crystallographic dependant corrosion channel facets mainly parallel to {100} planes. Non-uniform distribution of misorientation in the 2A97 aluminum alloy results in a portion of grains of relatively high stored energy. Such grains were preferentially attacked, serving as local anodes, during the development of crystallographic pitting.

KW - aluminum-copper-lithium alloy

KW - corrosion product

KW - crystallographic orientation

KW - grain stored energy

KW - intermetallic particle

KW - localized corrosion

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U2 - 10.1007/s11665-016-2010-y

DO - 10.1007/s11665-016-2010-y

M3 - Article

AN - SCOPUS:84963774673

SN - 1059-9495

VL - 25

SP - 1811

EP - 1819

JO - Journal of Materials Engineering and Performance

JF - Journal of Materials Engineering and Performance

IS - 5

ER -

Characterization of Localized Corrosion in an Al-Cu-Li Alloy

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Keywords

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Light Alloys towards environmentally sustainable transport: 2nd generation solutions for Advanced Metallic Systems ( LATEST 2 )

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Characterization of Localized Corrosion in an Al-Cu-Li Alloy

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Light Alloys towards environmentally sustainable transport: 2nd generation solutions for Advanced Metallic Systems ( LATEST 2 )

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