Electrochemical profiling of multi-clad aluminium sheets used in automotive heat exchangers

Kirill Bordo; Visweswara  C. Gudla; Lionel Peguet; Andreas Afseth; Rajan Ambat

doi:10.1016/j.corsci.2017.11.011

Electrochemical profiling of multi-clad aluminium sheets used in automotive heat exchangers

Kirill Bordo, Visweswara C. Gudla^*, Lionel Peguet, Andreas Afseth, Rajan Ambat

^*Corresponding author for this work

Constellium Technology Center

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

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Abstract

A combination of glow discharge optical emission spectroscopy sputtering and local electrochemical measurements was used to determine electrochemical changes upon brazing in a multi-layered Aluminium sheet (AA4343/AA3xxx/AA4343) with an additional low-Cu (AA3xxx) interlayer. Ecorr values from potentiodynamic polarization, galvanic corrosion behaviour by ZRA, microstructure and composition by SEM and TEM were investigated and compared to those obtained for sheet without the interlayer. Inward diffusion of Si from clad, and outward diffusion of Cu from core are found to degrade the corrosion properties of conventional sheet, whereas presence of interlayer reduced outward diffusion of Cu and hence improved corrosion protection.

Original language	English
Journal	Corrosion Science
Volume	131
Pages (from-to)	28-37
ISSN	0010-938X
DOIs	https://doi.org/10.1016/j.corsci.2017.11.011
Publication status	Published - 2018

Keywords

A. Aluminium
A. Intermetallics
B. Sem
B. Polarization
B. Tem

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title = "Electrochemical profiling of multi-clad aluminium sheets used in automotive heat exchangers",

abstract = "A combination of glow discharge optical emission spectroscopy sputtering and local electrochemical measurements was used to determine electrochemical changes upon brazing in a multi-layered Aluminium sheet (AA4343/AA3xxx/AA4343) with an additional low-Cu (AA3xxx) interlayer. Ecorr values from potentiodynamic polarization, galvanic corrosion behaviour by ZRA, microstructure and composition by SEM and TEM were investigated and compared to those obtained for sheet without the interlayer. Inward diffusion of Si from clad, and outward diffusion of Cu from core are found to degrade the corrosion properties of conventional sheet, whereas presence of interlayer reduced outward diffusion of Cu and hence improved corrosion protection.",

keywords = "A. Aluminium, A. Intermetallics , B. Sem, B. Polarization, B. Tem",

author = "Kirill Bordo and {C. Gudla}, Visweswara and Lionel Peguet and Andreas Afseth and Rajan Ambat",

year = "2018",

doi = "10.1016/j.corsci.2017.11.011",

language = "English",

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pages = "28--37",

journal = "Corrosion Science",

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T1 - Electrochemical profiling of multi-clad aluminium sheets used in automotive heat exchangers

AU - Bordo, Kirill

AU - C. Gudla, Visweswara

AU - Peguet, Lionel

AU - Afseth, Andreas

AU - Ambat, Rajan

PY - 2018

Y1 - 2018

N2 - A combination of glow discharge optical emission spectroscopy sputtering and local electrochemical measurements was used to determine electrochemical changes upon brazing in a multi-layered Aluminium sheet (AA4343/AA3xxx/AA4343) with an additional low-Cu (AA3xxx) interlayer. Ecorr values from potentiodynamic polarization, galvanic corrosion behaviour by ZRA, microstructure and composition by SEM and TEM were investigated and compared to those obtained for sheet without the interlayer. Inward diffusion of Si from clad, and outward diffusion of Cu from core are found to degrade the corrosion properties of conventional sheet, whereas presence of interlayer reduced outward diffusion of Cu and hence improved corrosion protection.

AB - A combination of glow discharge optical emission spectroscopy sputtering and local electrochemical measurements was used to determine electrochemical changes upon brazing in a multi-layered Aluminium sheet (AA4343/AA3xxx/AA4343) with an additional low-Cu (AA3xxx) interlayer. Ecorr values from potentiodynamic polarization, galvanic corrosion behaviour by ZRA, microstructure and composition by SEM and TEM were investigated and compared to those obtained for sheet without the interlayer. Inward diffusion of Si from clad, and outward diffusion of Cu from core are found to degrade the corrosion properties of conventional sheet, whereas presence of interlayer reduced outward diffusion of Cu and hence improved corrosion protection.

KW - A. Aluminium

KW - A. Intermetallics

KW - B. Sem

KW - B. Polarization

KW - B. Tem

U2 - 10.1016/j.corsci.2017.11.011

DO - 10.1016/j.corsci.2017.11.011

M3 - Journal article

SN - 0010-938X

VL - 131

SP - 28

EP - 37

JO - Corrosion Science

JF - Corrosion Science

ER -

Electrochemical profiling of multi-clad aluminium sheets used in automotive heat exchangers

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