Substantially Higher Corrosion Resistance in AE42 Magnesium Alloy through Corrosion Layer Stabilization by ECAP Treatment

• Authors: P. Minárik , R. Král , B. Hadzima
• Languages of publication: EN

Abstracts

EN

The corrosion properties of magnesium alloy AE42, just extruded and with posterior eight passes through equal channel angular pressing after extrusion, were investigated in 0.1 M NaCl by electrochemical impedance spectroscopy. The obtained samples were compared using scanning electron microscopy micrographs of the corrosion layers created on the surface of the specimens. The background of the substantial higher corrosion resistance of the samples after equal channel angular pressing treatment was found to be the much thicker and stable corrosion layer and smaller separating fragments in comparison with the just extruded samples. The lowering of the grain size by severe plastic deformation, especially by the equal channel angular pressing treatment was found to be also responsible for the enhancement of the corrosion resistance in AE42 class of magnesium alloys.

Keywords

EN

81.05.-t; 82.45.Bb

Discipline

• 82.45.Bb: Corrosion and passivation(see also 81.65.Kn Corrosion protection and 81.65.Rv Passivation in surface treatments)
• 81.05.-t: Specific materials: fabrication, treatment, testing, and analysis(for superconducting materials, see 74.70.-b, and 74.72.-h; for magnetic materials, see 75.50.-y; for optical materials, see 42.70.-a; for dielectric materials, see 77.84.-s; for disperse systems and complex fluids, see 82.70.-y; see also 82.75.-z Molecular sieves, zeolites, clathrates, and other complex solids; for materials properties, see sections 60 and 70)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 122
• Issue: 3
• Pages: 614-617

Dates

published

2012-09

Contributors

author

P. Minárik

• Department of Physics of Materials, Charles University, Ke Karlovu 5, CZ-12116 Prague 2, Czech Republic

author

R. Král

• Department of Physics of Materials, Charles University, Ke Karlovu 5, CZ-12116 Prague 2, Czech Republic

author

B. Hadzima

• University of Žilina, Department of Materials Engineering, Žilina, Slovak Republic

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Identifiers

DOI

10.12693/APhysPolA.122.614