Influence of surface mechanical attrition treatment attrition media on the surface contamination and corrosion of magnesium

Fabijanic, D., Taylor, A., Ralston, K.D., Zhang, M.X. and Birbilis, N. 2013, Influence of surface mechanical attrition treatment attrition media on the surface contamination and corrosion of magnesium, Corrosion, vol. 69, no. 6, pp. 527-535.

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Title Influence of surface mechanical attrition treatment attrition media on the surface contamination and corrosion of magnesium
Author(s) Fabijanic, D.
Taylor, A.
Ralston, K.D.
Zhang, M.X.
Birbilis, N.
Journal name Corrosion
Volume number 69
Issue number 6
Start page 527
End page 535
Total pages 9
Publisher NACE International
Place of publication Houston, Tex.
Publication date 2013
ISSN 0010-9312
1938-159X
Keyword(s) corrosion
grain size
magnesium
polarization
surface mechanical attrition treatment
Summary Surface mechanical attrition treatment (SMAT) is a mechanical peening process used to generate ultrafine grain surfaces on a metal. SMAT was carried out on pure magnesium using different attrition media (zirconia [ZiO2], alumina [Al2O3], and steel balls) to observe the effect on microstructure, surface residual stress, surface composition, and corrosion. Surface contamination from SMAT was characterized using glow discharge optical emission spectroscopy (GDOES). The SMAT process produced a refined grain structure on the surface of Mg but resulted in a region of elemental contamination extending ~10 μm into the substrate, regardless of the media used. Consequently, SMAT-treated surfaces showed an increased corrosion rate compared to untreated Mg, primarily through increased cathodic kinetics. This study highlights the issue of contamination resulting from the SMAT process, which is a penalty that accompanies the significant grain refinement of the surface produced by SMAT. This must be considered if attempting to exploit grain refinement for improving corrosion resistance.
Language eng
Field of Research 109999 Technology not elsewhere classified
Socio Economic Objective 970110 Expanding Knowledge in Technology
HERDC Research category C1 Refereed article in a scholarly journal
Persistent URL http://hdl.handle.net/10536/DRO/DU:30055451

Document type: Journal Article
Collection: Institute for Frontier Materials
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