Abstract.
The effect of micro-alloying AM60B (Mg-6Al-0.3Mn) with As (well-known cathodic hydrogen gas (H2) evolution poison) on the reducing corrosion in 3.5 wt.% NaCl (aq) was determined. Custom permanent mold casting AM60B material, with and without, 0.23 wt.% micro-alloyed As was made for this purpose. Microstructure characterization was carried out using light optical microscopy and scanning electron microscopy with associated X-ray energy-dispersive spectroscopy. Corrosion rates were measured using mass loss and volumetric hydrogen gas evolution measurements. Potentiodynamic polarization measurements were made to reveal the global anode and cathode kinetics. Micro-alloying with As is somewhat beneficial in reducing corrosion, but not to the extent reported for unalloyed Mg. More importantly, corrosion involves toxic arsine gas (AsH3) evolution, in addition to H2, consistent with thermodynamic predictions. Alternative micro-alloying routes are proposed for improved corrosion control via micro-alloying with non-toxic cathode poisons.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Abbott TB. Magnesium: industrial and research developments over the last 15 years. Corrosion. 2015;71:120–7. https://doi.org/10.5006/1474.
Luo AA. Magnesium: current and potential automotive applications. JOM. 2002;54:42–8. https://doi.org/10.1007/BF02701073.
Esmaily M, Svensson JE, Fajardo S, Birbilis N, Frankel GS, Virtanen S, Arrabal R, Thomas S, Johansson LG. Fundamentals and advances in magnesium alloy corrosion. Prog Mater Sci. 2017;89:92–193. https://doi.org/10.1016/j.pmatsci.2017.04.011.
Thomas S, Medhekar NV, Frankel GS, Birbilis N. Corrosion mechanism and hydrogen evolution on Mg. Curr Opin Solid State Mater Sci. 2015;19:85–94. https://doi.org/10.1016/j.cossms.2014.09.005.
Eaves D, Williams G, McMurray HN. Inhibition of self-corrosion in magnesium by poisoning hydrogen recombination on iron impurities. Electrochim Acta. 2012;79:1–7. https://doi.org/10.1016/j.electacta.2012.05.148.
Birbilis N, Williams G, Gusieva K, Samaniego A, Gibson MA, McMurray HN. Poisoning the corrosion of magnesium. Electrochem Commun. 2013;34:295–8. https://doi.org/10.1016/j.elecom.2013.07.021.
Barbagallo S, Laukli HI, Lohne O, Cerri E. Divorced eutectic in a HPDC magnesium–aluminum alloy. J Alloys Compd. 2004;378:226–32. https://doi.org/10.1016/j.jallcom.2003.11.174.
Jönsson M, Thierry D, LeBozec N. The influence of microstructure on the corrosion behaviour of AZ91D studied by scanning Kelvin probe force microscopy and scanning kelvin probe. Corros Sci. 2006;48:1193–208. https://doi.org/10.1016/j.corsci.2005.05.008.
Andreatta F, Apachitei I, Kodentsov AA, Dzwonczyk J, Duszczyk J. Volta potential of second phase particles in extruded AZ80 magnesium alloy. Electrochim Acta. 2006;51:3551–7. https://doi.org/10.1016/j.electacta.2005.10.010.
Danaie M, Asmussen RM, Jakupi P, Shoesmith DW, Botton GA. The cathodic behaviour of AlMn precipitates during atmospheric and saline aqueous corrosion of a sand-cast AM50 alloy. Corros Sci. 2014;83:299–309. https://doi.org/10.1016/j.corsci.2014.02.030.
Trasatti S. Electrocatalysis of hydrogen evolution: progress in cathode activation. In: Gerischer H, Tobias C, editors. Advances in electrochemical science & engineering, vol. 2. New York: VCH Publishers Inc.; 1992. p. 1–86. https://onlinelibrary.wiley.com/doi/pdf/10.1002/9783527616763#page=8.
Gusieva K, Davies CHJ, Scully JR, Birbilis N. Corrosion of magnesium alloys: the role of alloying. Int Mater Rev. 2015;60:169–94. https://doi.org/10.1179/1743280414Y.0000000046.
Gusieva K, Birbilis N, Hammond VH, Labukas JP, Placzankis BE. The influence of novel alloying additions on the performance of magnesium alloy AZ31B. Report No. ARL-MR-856, Army Research Lab Aberdeen Proving Ground MD Weapons and Materials Research Directorate; 2013.
Acknowledgments
Financial support was provided by the Natural Science and Engineering Research Council of Canada (NSERC) in the form of an Engage grant with Alliance Magnesium as the industry partner.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2023 The Author(s), under exclusive license to Springer Nature Switzerland AG
About this paper
Cite this paper
Kish, J., Fu, D., McNally, B., Feenstra, D., Javaid, A., Sadayappan, K. (2023). Corrosion of Mg Alloy AM60B Micro-Alloyed with As. In: Proceedings of the 61st Conference of Metallurgists, COM 2022. COM 2022. Springer, Cham. https://doi.org/10.1007/978-3-031-17425-4_32
Download citation
DOI: https://doi.org/10.1007/978-3-031-17425-4_32
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-031-17424-7
Online ISBN: 978-3-031-17425-4
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)