In this research, binary Mg-Zn (up to 3 wt% Zn) and ternary Mg-Zn-Gd (up to 3 wt% Gd, 3 wt% Zn) alloys were prepared by induction melting in an argon atmosphere. The structures of these alloys were characterized using light and scanning electron microscopy, energy dispersive spectrometry, X-ray diffraction and X-ray fluorescence. In addition, Brinell hardness measurements were taken to supplement these studies. Corrosion behavior was evaluated by immersion tests and potentiodynamic measurements in a physiological solution (9 g/l NaCl). Depending on the composition, structures of the as-cast alloys contained α-Mg dendrites, MgZn, Mg5Gd and Mg3Gd2Zn3 phases. Compared to pure Mg, zinc improved the corrosion resistance of binary Mg-Zn. Gadolinium also improved the corrosion resistance in the case of Mg-1Zn-3Gd alloy. The highest corrosion rate was observed for Mg-3Zn-3Gd alloy. Our results improve the understanding of the relationships between the structure and corrosion behavior of our studied alloy systems.

Department of Metals and Corrosion Engineering Institute of Chemical Technology Prague Technická 5 166 28 Prague 6 Czech Republic

Zobrazit více v PubMed

Acta Biomater. 2009 Sep;5(7):2790-9 PubMed

Acta Biomater. 2010 May;6(5):1824-33 PubMed

J Endovasc Ther. 2005 Feb;12(1):1-5 PubMed

Acta Biomater. 2010 May;6(5):1680-92 PubMed

Biomaterials. 2008 Apr;29(10):1329-44 PubMed

Mol Aspects Med. 2003 Feb-Jun;24(1-3):27-37 PubMed

Acta Biomater. 2010 May;6(5):1772-82 PubMed

Acta Biomater. 2011 Apr;7(4):1452-9 PubMed

Acta Biomater. 2010 May;6(5):1714-25 PubMed

J Interv Cardiol. 2004 Dec;17(6):391-5 PubMed

Biomaterials. 2006 Mar;27(9):1728-34 PubMed

Acta Biomater. 2010 Feb;6(2):626-40 PubMed

Nat Mater. 2009 Nov;8(11):887-91 PubMed

Lancet. 2007 Jun 2;369(9576):1869-1875 PubMed

Acta Biomater. 2010 May;6(5):1756-62 PubMed

Biomaterials. 2010 Feb;31(6):1093-103 PubMed

J Mater Sci Mater Med. 2010 Sep;21(9):2623-35 PubMed

J Biomed Mater Res A. 2009 Oct;91(1):221-30 PubMed