Influence of mictrostructure features on the corrosion behaviourof AZ91 alloy in chloride media

Lenka Bukovinová, Michal Bukovina, Filip Pastorek

Abstract


The influence of the microstructure of as-cast AZ91 magnesium alloy, which applied to solution annealing treatment and ageing treatment respectively, was evaluated in terms of its corrosion behaviour in 0.1 M NaCl solution at room temperature. The corrosion process was monitored by electrochemical impedance spectroscopy (EIS) and the surface was characterized by scanning Kelvin probe force microscopy (SKPFM). The extent of corrosion damage was dependent on the microstructure. Surface potential maps indicated that, the surface potential of α-matrix is more positive than surface potential of β phase.

Keywords


AZ91 alloy; solid solution; β phase; EIS; SKPFM

Full Text:

PDF

References


J.P. Weiler, J.T. Wood: J. Alloys Comp. 537 (2012) 133–140.

L. Li, Y. Cheng, H., Y. Zhang: Trans. Nonferrous Met. Soc. China 18 (2008) 722-727.

J. Li, J. Xie, J. Jin, Z. Wang: Trans. Nonferrous Met. Soc. China 22 (2012) 1028-1034.

G. Tong, H. Liu, Y. Liu : Trans. Nonferrous Met. Soc. China 20 (2010) s336-s340.

R. Hu, S. Zhang, J. Bu, Ch. Lin, G. Song: Prog. Org. Coat. 73 (2012) 129– 141.

H. Bayani, E. Saebnoori: J. Rare Earth. 27 (2) ( 2009) 255-258.

K. M. Asl, A. Masoudi, F. Khomamizadeh: Mater. Sci. Eng. A 527 (2010) 2027–2035.

L. Yang, Y. Li, Y. Wei, L. Hou, Y. Li, Y. Tian: Corros. Sci. 52 (2010) 2188–2196.

M. Ö. Öteyaka, E. Ghali, R. Tremblay: Int. J. Corros. 2012 (2012) 10 p.

R. Mahmudi, F. Kabirian, Z. Nematollahi: Mater. Des. 32 (2011) 2583–2589.

H. Krawiec, S. Stanek, V. Vignal, J. Lelito, J.S. Suchy: Corros. Sci. 53 (2011) 3108–3113.

G. Song, A. Atrens, M. Dargusch: Corros. Sci. 41 (1999) 249-273).

F. Pastorek, B. Hadzima: Mater. Eng.-Mater. inž. 20 (2) (2013) 54-63.

A. Pardo, M.C. Merino, A.E. Coy, F. Viejo, R. Arrabal, S. Feliú Jr.: Electrochim. Acta 53 (2008) 7890–7902.

http://www.ntmdt.com/spm-principles/view/kelvin-probe-microscopy

L. Škublová, B. Hadzima, M. Bukovina, V. Škorík: J. Machine Manufacturing 49 (E3-E5) (2009) 18-22.

S. Mathieu, C. Rapin, J. Steinmetz, P. Steinmetz: Corros. Sci. 45 (2003) 2741-2755.


Refbacks

  • There are currently no refbacks.




Copyright (c) 2014 Lenka Bukovinová, Michal Bukovina, Filip Pastorek

License URL: http://creativecommons.org/licenses/by-nc-nd/3.0/

................................

Articles published in the journal of Materials Engineering / Materialove inzinierstvo are indexed in Directory of Open Access Journals, Index Copernicus International, Google Scholar, Open J-GateBielefeld Academic Search Engine, Academic journal database, The Open Access Digital Library, ABC Chemistry - free chemical information, New jour, Academic Keys, Ulrich's Serials Solutions (a Proquest Business), EBSCO Academic Search, SHERPA/RoMEOGenamics JournalSeek, New York University Libraries, TrueserialsProQuest Database: ProQuest Engineering Journals, Cornell University Library,Scientific indexing services. You can find us on Facebook, Google Groups and Linked IN.