Localized impedance measurements of AA2024 and AA2024-T3 performed by means of AFM in contact mode

Localized impedance measurements of AA2024 and AA2024-T3 performed by means of AFM in contact mode

Purpose - The purpose of this paper is to present the results of an atomic force microscopy (AFM) based approach to local impedance spectroscopy (LIS) measurement performed on AA2024 and AA2024-T3 aluminium alloys.Design methodology approach - AFM-LIS measurements were performed ex-situ without the...

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Bibliographic Details
Published in:Anti-corrosion methods and materials Vol. 60; no. 2; pp. 67 - 72
Main Authors: Arutunow, Anna, Zieli ski, Artur, Tobiszewski, Mateusz T
Format: Journal Article
Language:English
Published: Bradford Emerald Group Publishing Limited 15-03-2013
Subjects:
Age hardening
Alloys
Aluminium
Aluminum
Aluminum alloys
Aluminum base alloys
Analytical methods
Atomic force microscopy
Case hardenability
Contact
Corrosion
Corrosion potential
Corrosion prevention
Crystals
Electric contacts
Electrochemistry
Electrodes
Electrolytes
Grain boundaries
Impedance
Intergranular corrosion
Investigations
Localization
Materials science
Microscopes
Microscopy
Reagents
Spectrum analysis
Topography
Work stations
Atomic force microscopy
Corrosion
AA2024
Alloys
AA2024-T3
Intergranular corrosion
Local impedance spectroscopy
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Summary:Purpose - The purpose of this paper is to present the results of an atomic force microscopy (AFM) based approach to local impedance spectroscopy (LIS) measurement performed on AA2024 and AA2024-T3 aluminium alloys.Design methodology approach - AFM-LIS measurements were performed ex-situ without the electrolyte environment, so in fact the electrical not electrochemical impedance was obtained.Findings - Relative local impedance values recorded for AA2024 alloy during the researches carried out were maximally approximately three orders of magnitude higher than the ones obtained for age-hardened AA2024-T3 alloy. Moreover, in the case of AA2024-T3 alloy, a region located in the interior of α crystals exhibited localized impedance one order of magnitude higher than that measured at its grain boundary when affected by intergranular corrosion.Originality value - The paper presents differences in localized impedance between grain and grain boundaries activity.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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content type line 23
ISSN:0003-5599
1758-4221
DOI:10.1108/00035591311308038