Corrosion protection of AA7449-T7951 friction stir welds by laser surface melting with an Excimer laser

C. Padovani; A.J. Davenport; B.J. Connolly; S.W. Williams; E. Siggs; A. Groso; M. Stampanoni

doi:10.1016/j.corsci.2011.07.043

Corrosion protection of AA7449-T7951 friction stir welds by laser surface melting with an Excimer laser

C. Padovani, A.J. Davenport, B.J. Connolly, S.W. Williams, E. Siggs, A. Groso, M. Stampanoni

Metallurgy and Materials

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

30 Citations (Scopus)

Abstract

The corrosion protection afforded by laser surface melting (LSM) AA7449-T7951 friction stir welds was investigated. LSM produced melting of the constituent particles and formation of a homogeneous 3-5 mu m thick layer. Electrochemical tests showed a reduction in cathodic reactivity after LSM. The breakdown potentials, however, did not change significantly, indicating an anodically reactive surface. In situ and ex situ observation after immersion in 0.1 M NaCl showed that LSM reduced the depth attack in the weld region (particularly the HAZ), affording sacrificial protection to the substrate. Delamination of the treatment can occur during corrosion propagation. (C) 2011 Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	3956-3969
Number of pages	14
Journal	Corrosion Science
Volume	53
Issue number	12
DOIs	https://doi.org/10.1016/j.corsci.2011.07.043
Publication status	Published - 1 Dec 2011

Keywords

Aluminium
Welding

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10.1016/j.corsci.2011.07.043

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title = "Corrosion protection of AA7449-T7951 friction stir welds by laser surface melting with an Excimer laser",

abstract = "The corrosion protection afforded by laser surface melting (LSM) AA7449-T7951 friction stir welds was investigated. LSM produced melting of the constituent particles and formation of a homogeneous 3-5 mu m thick layer. Electrochemical tests showed a reduction in cathodic reactivity after LSM. The breakdown potentials, however, did not change significantly, indicating an anodically reactive surface. In situ and ex situ observation after immersion in 0.1 M NaCl showed that LSM reduced the depth attack in the weld region (particularly the HAZ), affording sacrificial protection to the substrate. Delamination of the treatment can occur during corrosion propagation. (C) 2011 Elsevier Ltd. All rights reserved.",

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T1 - Corrosion protection of AA7449-T7951 friction stir welds by laser surface melting with an Excimer laser

AU - Padovani, C.

AU - Davenport, A.J.

AU - Connolly, B.J.

AU - Williams, S.W.

AU - Siggs, E.

AU - Groso, A.

AU - Stampanoni, M.

PY - 2011/12/1

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N2 - The corrosion protection afforded by laser surface melting (LSM) AA7449-T7951 friction stir welds was investigated. LSM produced melting of the constituent particles and formation of a homogeneous 3-5 mu m thick layer. Electrochemical tests showed a reduction in cathodic reactivity after LSM. The breakdown potentials, however, did not change significantly, indicating an anodically reactive surface. In situ and ex situ observation after immersion in 0.1 M NaCl showed that LSM reduced the depth attack in the weld region (particularly the HAZ), affording sacrificial protection to the substrate. Delamination of the treatment can occur during corrosion propagation. (C) 2011 Elsevier Ltd. All rights reserved.

AB - The corrosion protection afforded by laser surface melting (LSM) AA7449-T7951 friction stir welds was investigated. LSM produced melting of the constituent particles and formation of a homogeneous 3-5 mu m thick layer. Electrochemical tests showed a reduction in cathodic reactivity after LSM. The breakdown potentials, however, did not change significantly, indicating an anodically reactive surface. In situ and ex situ observation after immersion in 0.1 M NaCl showed that LSM reduced the depth attack in the weld region (particularly the HAZ), affording sacrificial protection to the substrate. Delamination of the treatment can occur during corrosion propagation. (C) 2011 Elsevier Ltd. All rights reserved.

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KW - Welding

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DO - 10.1016/j.corsci.2011.07.043

M3 - Article

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JO - Corrosion Science

JF - Corrosion Science

IS - 12

ER -

Corrosion protection of AA7449-T7951 friction stir welds by laser surface melting with an Excimer laser

Abstract

Keywords

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