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Anodization of Al(100), Al(111) and Al Alloy 6063 studied in situ with X-ray reflectivity and electrochemical impedance spectroscopy

Evertsson, Jonas LU ; Bertram, Florian LU ; Rullik, Lisa LU ; Harlow, Gary LU and Lundgren, Edvin LU (2017) In Journal of Electroanalytical Chemistry 799. p.556-562
Abstract

We present results from the anodization of single crystal Al(100) and Al(111) surfaces and the aluminum alloy AA 6063 studied in situ by X-ray reflectivity and electrochemical impedance spectroscopy. We observe that the anodic oxide layer grows linearly with the anodization potential and that the thicknesses are similar for all samples. However, the thicknesses obtained from X-ray reflectivity are higher than that obtained from electrochemical impedance spectroscopy. We attribute the higher thicknesses to an outer porous oxide layer, which is not detected by electrochemical impedance spectroscopy. Both, electrochemical impedance spectroscopy and X-ray reflectivity suggests that a more heterogeneous and rough oxide is formed on AA 6063... (More)

We present results from the anodization of single crystal Al(100) and Al(111) surfaces and the aluminum alloy AA 6063 studied in situ by X-ray reflectivity and electrochemical impedance spectroscopy. We observe that the anodic oxide layer grows linearly with the anodization potential and that the thicknesses are similar for all samples. However, the thicknesses obtained from X-ray reflectivity are higher than that obtained from electrochemical impedance spectroscopy. We attribute the higher thicknesses to an outer porous oxide layer, which is not detected by electrochemical impedance spectroscopy. Both, electrochemical impedance spectroscopy and X-ray reflectivity suggests that a more heterogeneous and rough oxide is formed on AA 6063 due to the influence of the alloying elements and intermetallic particles during the growth.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Aluminum alloy, Aluminum single crystal, Anodization, Electrochemical impedance spectroscopy, X-ray reflectivity
in
Journal of Electroanalytical Chemistry
volume
799
pages
7 pages
publisher
Elsevier
external identifiers
  • scopus:85022340033
  • wos:000411847300074
ISSN
1572-6657
DOI
10.1016/j.jelechem.2017.07.010
language
English
LU publication?
yes
id
1f0829f7-63d7-4619-975d-3ead52e8bdc8
date added to LUP
2017-07-24 10:01:57
date last changed
2018-06-10 05:21:30
@article{1f0829f7-63d7-4619-975d-3ead52e8bdc8,
  abstract     = {<p>We present results from the anodization of single crystal Al(100) and Al(111) surfaces and the aluminum alloy AA 6063 studied in situ by X-ray reflectivity and electrochemical impedance spectroscopy. We observe that the anodic oxide layer grows linearly with the anodization potential and that the thicknesses are similar for all samples. However, the thicknesses obtained from X-ray reflectivity are higher than that obtained from electrochemical impedance spectroscopy. We attribute the higher thicknesses to an outer porous oxide layer, which is not detected by electrochemical impedance spectroscopy. Both, electrochemical impedance spectroscopy and X-ray reflectivity suggests that a more heterogeneous and rough oxide is formed on AA 6063 due to the influence of the alloying elements and intermetallic particles during the growth.</p>},
  author       = {Evertsson, Jonas and Bertram, Florian and Rullik, Lisa and Harlow, Gary and Lundgren, Edvin},
  issn         = {1572-6657},
  keyword      = {Aluminum alloy,Aluminum single crystal,Anodization,Electrochemical impedance spectroscopy,X-ray reflectivity},
  language     = {eng},
  month        = {08},
  pages        = {556--562},
  publisher    = {Elsevier},
  series       = {Journal of Electroanalytical Chemistry},
  title        = {Anodization of Al(100), Al(111) and Al Alloy 6063 studied in situ with X-ray reflectivity and electrochemical impedance spectroscopy},
  url          = {http://dx.doi.org/10.1016/j.jelechem.2017.07.010},
  volume       = {799},
  year         = {2017},
}