Microstructure and corrosion characterization of the interfacial region in dissimilar friction stir welded AA5083 to AA7023

Davoodi, Ali, Esfahani, Zohreh, & Sarvghad, Madjid (2016) Microstructure and corrosion characterization of the interfacial region in dissimilar friction stir welded AA5083 to AA7023. Corrosion Science, 107, pp. 133-144.

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Microstructure and the corrosion behaviour of friction stir weld region in an aluminium AA5083/AA7023 dissimilar joint was studied using SEM/EDS, potentiodynamic polarization, EIS and AFM/SKPFM techniques. In the presence of an inhomogeneous borderline consisting of Al-Mg-Zn precipitates, a galvanic cell was formed at the interfacial region. Corrosion tests showed that the corrosion resistance of FSW region is in between that of AA5083 and AA7023. AA5083 possesses lower Volta potential compared to AA7023, however, corrosion initiates from both the FSW borderline and areas around intermetallic particles, particularly in AA7023 side.

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ID Code: 95793
Item Type: Journal Article
Refereed: Yes
Keywords: Aluminium, AFM, EIS, Polarization, Interfaces, Welding
DOI: 10.1016/j.corsci.2016.02.027
ISSN: 0010-938X
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Facilities: Central Analytical Research Facility
Copyright Owner: Copyright 2016 Elsevier Ltd.
Deposited On: 26 May 2016 23:02
Last Modified: 29 May 2016 22:10

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