Effect of Stabilizing Treatment on the Intergranular Corrosion Behavior of High Strength Al-Mg Alloys


Article Preview

In order to improve the intergranular corrosion resistance of high strength Al-Mg alloys, the effect of stabilizing treatment was systematically investigated. Microstructure evolutions of Al-Mg alloys after different stabilizing treatments have been studied by scanning electron microscopy and optical microscopy. Mechanical properties and corrosion resistance were measured. It was found that the mass loss of samples after sensitizing treatment decreased with an increase in the stabilizing temperature. It was suggested that the susceptibility to intergranular corrosion for high strength Al-Mg alloys has a strong relation to the stabilizing temperature that modify the morphology and distribution of precipitates. The precipitates continuously precipitated along the grain boundary when the stabilizing temperature was lower than 250°C, corresponding to a poor corrosion resistance. However, the precipitates randomly precipitated in the matrix as globular particles, and discontinuously precipitated at the grain boundary after stabilized at 250°C and 275°C, resulted in an improved intergranular corrosion resistance.



Materials Science Forum (Volumes 794-796)

Edited by:

Knut Marthinsen, Bjørn Holmedal and Yanjun Li




C. Y. Meng et al., "Effect of Stabilizing Treatment on the Intergranular Corrosion Behavior of High Strength Al-Mg Alloys", Materials Science Forum, Vols. 794-796, pp. 253-258, 2014

Online since:

June 2014




* - Corresponding Author

[1] L. Kramer, M. Phillippi, W.T. Tack, C. Wong, Locally reversing sensitization in 5xxx aluminum plate, J. Mater. Eng. Perform. 21(2012) 1025-1029.

DOI: https://doi.org/10.1007/s11665-011-9998-9

[2] J. Buczynski, Characterization of the β-phase (Al3Mg2) in 5XXX aluminum alloys, DOD Corrosion Conference. (2011) 1-5.

[3] R.H. Jones, D.R. Baer, M.J. Danielson, J.S. Vetrano, Role of Mg in the stress corrosion cracking of an Al-Mg alloy, Metall. Mater. Trans. A. 32(2001) 1699-1711.

DOI: https://doi.org/10.1007/s11661-001-0148-0

[4] M.C. Carroll, P.I. Gouma, M.J. Mills, G.S. Daehn, B.R. Dunbar, Effects of Zn additions on the grain boundary precipitation and corrosion of Al-5083, Scripta Mater. 42(2000) 335-340.

DOI: https://doi.org/10.1016/s1359-6462(99)00349-8

[5] J.L. Searles, P.I. Gouma, R.G. Buchheit, Stress corrosion cracking of sensitized AA5083 (Al-4. 5Mg-1. 0Mn), Metall. Mater. Trans. A. 32(2001) 2859-2867.

DOI: https://doi.org/10.1007/s11661-001-1036-3

[6] I.N.A. Oguocha, O.J. Adigun, S. Yannacopoulos, Effect of sensitization heat treatment on properties of Al–Mg alloy AA5083-H116, J. Mater. Sci. 43(2008) 4208-4214.

DOI: https://doi.org/10.1007/s10853-008-2606-1

[7] M.C. Carroll, P.I. Gouma, M.J. Mills, G.S. Daehn, B.R. Dunbar, Effects of Zn additions on the grain boundary precipitation and corrosion of Al-5083, Scripta Mater, 42(2000) 335-340.

DOI: https://doi.org/10.1016/s1359-6462(99)00349-8

[8] L.F. Mondolfo, Aluminum alloys : structure and properties, London : Butter Worths, London, (1976).

[9] R.E. Sanders Jr, P.A. Hollinshead, E.A. Simielli, Industrial development of non-heat treatable aluminum alloys, Mater. Sci. Forum, 28(2004) 53-64.

[10] E.H. Dix, W.A. Andersen Jr, Influence of service temperature on the resistance of wrought aluminum-magnesium alloys to corrosion, Corros. Sci. 2(1959) 55-62.

[11] S. Bensaada, M.T. Bouziane, F. Mohammedi, Effect of the temperature on the mechanism of the precipitation in Al-8% mass. Mg alloy, Mater. Lett. 65(2011) 2829-2832.

DOI: https://doi.org/10.1016/j.matlet.2011.05.087

[12] M. Popović, E. Romhanji, Characterization of microstructural changes in an Al-6. 8wt. % Mg alloy by electrical resistivity measurements, Mater. Sci. Eng. A. 492(2008) 460-467.

DOI: https://doi.org/10.1016/j.msea.2008.04.001

[13] Standard test method for determining the susceptibility to intergranular corrsosion of 5xxx series aluminum alloys by mass loss after exposure to nitric acid (NAMLT test), ASTM G67, 2004, p.3.

DOI: https://doi.org/10.1520/g0067

[14] C.Y. Meng, D. Zhang, H. Cui, J.S. Zhang, L.Z. Zhuang, Effect of Zn addtion on the intergranular corrosion behavior of high strength Al-Mg alloys, unpublished result.

[15] S. Nebti, D. Hamana, G. Cizeron, Calorime study of pre-precipitation and precipition in Al-Mg alloy, Acta Mater. 43(1995) 3583-3588.

DOI: https://doi.org/10.1016/0956-7151(95)00023-o

[16] M. Bouchear, D. Hamana, T. Laoui, GP zones and precipitate morphology in aged Al-Mg alloys, Philos. Mag. A. 73(1996) 1733-1740.

DOI: https://doi.org/10.1080/01418619608243010

[17] R.C. Picu, D. Zhang, Atomistic study of pipe diffusion in Al–Mg alloys, Acta Mater. 52(2004) 161-171.

DOI: https://doi.org/10.1016/j.actamat.2003.09.002

[18] R. Goswami, G. Spanos, P.S. Pao, R.L. Holtz, Precipitation behavior of the β phase in Al-5083, Mater. Sci. Eng. A. 527(2010) 1089-1095.

DOI: https://doi.org/10.1016/j.msea.2009.10.007

Fetching data from Crossref.
This may take some time to load.