Comparison between mechanochemical effect on die cast and extruded magnesium alloys

Abstract

The mechanochemical effect (MCE) of several magnesium based alloys, obtained by both die casting and extrusion methods, was studied by potentiodynamic polarisation and electrochemical impedance spectroscopy (EIS) techniques. The mechanochemical behaviour of each alloy was evaluated as a function of die cast parameter, environment, and alloy composition. Electrochemical tests were performed in a buffer solution of sodium tetraborate, (Na₂B₄O₇) with and without magnesium hydroxide (Mg(OH)₂). The MCE was correlated with the microstructure of the Mg alloys.

Keywords

MAGNESIUM ALLOYS MECHANOCHEMICAL EFFECT

Get full access to this article

View all access options for this article.

References

BABOIAN

(ed.): ‘Corrosion tests and standards: application and interpretation’, Chap. 45; 1995, Philadelphia, PA, ASTM.

GUTMAN

E. M.

: ‘Mechanochemistry of solid surfaces’, 1994, Singapore, World Scientific.

BACKER

, FISCHER

and SHCHEMME

: in: ‘Magnesium alloys and their applications’, 1998, Germany, Mat-Info.

ELIEZER

, GUTMAN

E. M.

, ABRAMOV

and AGHION

: Mater. Sci. Forum, 1998, 289 – 292, 517 – 528.

BONORA

P. L.

, ANDREI

, ELIEZER

and GUTMAN

E. M.

: Corros. Sci., 2002, 44, 729– 749.

POURBAIX

: ‘Atlas of electrochemical equilibria in aqueous solutions’, 141; 1974, Brussels, Cebelcor.

BOUKAMP: ‘Equivalent circuit software - users manual’, 6-26; 1988, The Netherlands University of Twente.

LUNDER

, LEIN

J. E.

, T. KR. AUNE and K. NISANCIOGLU: Corrosion, 1989, 45, 741.

ELIEZER

, ABRAMOV

and GUTMAN

E. M.

: ‘Magnesium 97 — Proc. of the 1st Israeli Int. Conf. on Magnesium Science & Technology’, (ed. Aghion

and Eliezer

), Dead Sea, Israel, 192-201; 1997, Beer Sheva, MRI.