Corrosion of High Zn Content Al-Zn-Mg-Cu Alloy in 3.5 wt.% NaCl Solution

Abstract:

In this paper, the polished specimens of high Zn content Al-Zn-Mg-Cu alloy after various aging treatments were immersed in 3.5 wt.% NaCl for up to 240 mins. The development of corrosion was monitored using scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDX). There are two stages during the corrosion process, the first stage of attack started with localized corrosion of trenching around the Al-Zn-Mg-Cu particles. In the second stage the pitting corrosion appeared at the grain boundaries, and then developed into intergranular corrosion. This phenomenon is related to the potential difference between the matrix and the precipitates.

• Periodical: Applied Mechanics and Materials (Volume 703)
• Pages: 21-28
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.703.21
• Online since: December 2014
• Authors: Fan Qing Ran, Zi Yong Chen*, Li Hua Chai
• Keywords: Ageing Treatment, Al-Zn-Mg-Cu Alloy, Intermetallics Particles, Pitting Corrosion, Trenching

References

[1] Yi Lin Wang, Qing Lin Pan, Li Li Wei, Bo Li and Ying Wang: Mater. Des Vol. 55(2014), pp.857-863.

[2] A. Heinz, A. Haszler, C. Keidel, S. Moldenhauer, R. Benedictus and W.S. Miller: Mater. Sci. Eng., A Vol. 280(2000), pp.102-107.

DOI: 10.1016/s0921-5093(99)00674-7

[3] K. H. Rendigs: Mater. Sci. Forum Vol. 242(1996), pp.11-24.

[4] M. K. Cavanaugh: Modeling the environmental dependence of localized corrosion evolution in AA7075-T651. The Ohio State University, (2009).

[5] T.S. Srivatsan, S. Anand, S. Sriram and V.K. Vasudevan: Mater. Sci. Eng., A Vol. 281(2000), P. 292-304.

[6] J.C. Williams, E. A. Starke Jr: Acta Metall Vol. 51(2003), pp.5775-5799.

[7] Ling-Mei Wu, Wen-Hsiung Wang, Yung-Fu Hsu and Shan Trong: J. Alloys Compd Vol. 456(2008), pp.163-169.

[8] Ziyong Chen, Yuanke Mo and Zuoren Nie: Metall. Mater. Trans. A Vol. 44(2013), pp.3910-3920.

[9] P. Leo and E. Cerri, in: Aluminium Alloys-New Trends in Fabrication and Applications, edited by Zaki Ahmad, chapter, 10, InTech Publishers (2013).

[10] T. Muster, A. E. Hughes, G. E. Thompson, in: Corrosion Research Trends, edited by I. S. Wang, Nova Science Publishers (2009).

[11] A. Boag, A.E. Hughes, A.M. Glenn, T.H. Muster and D. McCulloch: Corros. Sci Vol. 53(2011), pp.17-26.

[12] M. Gao, C. R. Feng and R. P. Wei: Metall. Mater. Trans. A Vol. 29(1998), pp.1145-1151.

[13] J. Wloka and S. Virtanen: Acta Metall Vol. 55(2007), pp.6666-6672.

[14] D. Najjar, T. Magnin and T. J. Warner: Mater. Sci. Eng., A Vol. 238(1997), pp.293-302.

[15] K. Ural: J. Mater. Sci. Lett Vol. 13(1994), pp.383-385.

[16] F. Andreatta, H. Terryn and J. H. W. de Wit: Electrochim. Acta Vol. 49(2004), pp.2851-2862.

[17] T. Ramgopal, P. I. Gouma and G. S. Frankel: Corros. Vol. 58(2002), pp.687-697.

[18] J. Wloka and S. Virtanen: J. Electrochem. Soc Vol. 154(2007), p. C411-C423.

[19] Fengxuan Song, Xinming Zhang, Shengdan Liu, Qi Tan and Dongfeng Li: Corros. Sci. Vol. 78(2014), pp.276-286.

[20] D. K. Xu, P. A. Rometsch, L. Li, L. M. Shen and N. Birbilis: J. Mater. Sci. (2014), pp.1-11.

[21] M. Puiggali, A. Zielinski, J. M. Olive, E. Renauld, D. Desjardins and M. Cid: Corros. Sci. Vol. 40(1998), pp.805-819.

DOI: 10.1016/s0010-938x(98)00002-x

[22] A. E. Hughes, C. MacRae, N. Wilson, A. Torpy, T. H. Muster and A. M. Glenn: Surf. Interface Anal. Vol. 42(2010), pp.334-338.

DOI: 10.1002/sia.3163

[23] Fangzu Zhu: The corrosion resistance and application of non-ferrous metals (Chemical Industry Press, Beijing 1995), In Chinese.

[24] J. R. DAVIES: Corrosion of aluminum and aluminum alloys (ASM International, America, 1999).

[25] Fanqing Ran, Lihua Chai, Kunyuan Gao, Zuoren Nie and Ziyong Chen: Corros Eng Sci Techn Vol. 49(2014), pp.712-718.