Abstract
Aluminum coatings on Mg alloy AZ31 were fabricated using the thermal spraying technique, and then sealed with silane. The surface morphology and chemical groups were discerned using scanning electron microscopy and examined using Fourier transformation infrared spectroscopy, respectively. The salt fog tests and the potentiodynamic electrochemical technique were applied to evaluate the influence of silane on corrosion of the AZ31 alloy with aluminum coatings. The results showed that the corrosion resistance of the aluminum-coated AZ31 alloy was superior to that of the substrate. The aluminum coating sealed with various silane layers led to a further increase in the corrosion resistance of the alloy. Double silane layers were more corrosion-resistant than the single one. Also, it was no longer significant for more than two silane layers to improve the corrosion resistance. It implied that the optimum choice for silane treatment on the aluminum coatings was two layers.
Similar content being viewed by others
References
Zeng R.C., Ke W., Xu Y.B., and Han E.H., Recent development and application of magnesium alloys, Acta Metall. Sin. (in Chinese), 2001, 37(7): 673.
Zeng R.C., Zhang J., Huang W.J., Dietzel W., Kainer K.U., Blawert C., and Ke W., Review of studies on corrosion of magnesium alloys, Trans. Nonferrous Met. Soc. China, 2006, 16(Suppl.1): s763.
Zhou W.Q., Shan D.Y., Han E.H., and Ke W., Structure and formation mechanism of phosphate conversion coating on die-cast AZ91D magnesium alloy, Corros. Sci., 2008, 50(2): 329.
Zucchi F., Frignani A., Grassi V., Trabanelli G., and Monticelli C., Stannate and permanganate conversion coatings on AZ31 magnesium alloy, Corros. Sci., 2007, 49(12): 4542.
Lin C.S., Lin H.C., Lin K.M., and Lai W.C., Formation and properties of stannate conversion coatings on AZ61 magnesium alloys, Corros. Sci., 2006, 48(1): 93.
Ardelean H., Frateur I, and Marcus P., Corrosion protection of magnesium alloys by cerium, zirconium and niobium-based conversion coatings, Corros. Sci., 2008, 50(7): 1907.
Shi Z.M., Song G.L., and Atrens A., The corrosion performance of anodised magnesium alloys, Corros. Sci., 2006, 48(11): 3531.
Huang C.A., Wang T.H., Weirich T., and Neubert V., Electrodeposition of a protective copper/nickel deposit on the magnesium alloy (AZ31), Corros. Sci., 2008, 50(5): 1385.
Gray J.E. and Luan B., Protective coatings on magnesium and its alloys-a critical review, J. Alloys Compd., 2002, 336(1–2): 88.
Jun Y., Sun G.P., Wang H.Y., Jia S.Q., and Jia S.S., Laser (Nd:YAG) cladding of AZ91D magnesium alloys with Al + Si + Al2O3, J. Alloys Compd., 2006, 40(1–2): 201.
Zhu L.Q. and Song G.L., Improved corrosion resistance of AZ91D magnesium alloy by an aluminum-alloyed coating, Surf. Coat. Technol., 2006, 200(8): 2834.
Chiu L.H., Chen C.C., and Yang C.F., Improvement of corrosion properties in an aluminum-sprayed AZ31 magnesium alloy by a post-hot pressing and anodizing treatment, Surf. Coat. Technol., 2005, 191(2–3): 181.
Pokhmurskaa H., Wielagea B., Lampkea T., Grunda T., Studentb M., and Chervinska N., Post-treatment of thermal spray coatings on magnesium, Surf. Coat. Technol., 2008, 202(18): 4515.
Zhang J., Wang Y., Zeng R.C., and Huang W.J., Effects of post heat treatment on the interfacial characteristics of aluminum coated AZ91D magnesium alloy, Mater. Sci. Forum, 2007, 546–549: 529.
Van Ooij W.J., Zhu D., Stacy M., Seth A., Mugada T., Gandhi J., and Puomi P., Corrosion protection properties of or-ganofunctional silanes-An overview, Tsinghua Sci. Technol., 2005, 10(6): 639.
Zucchi F., Grassi V., Frignani A., Monticelli C., and Trabanelli G., Influence of a silane treatment on the corrosion resistance of a WE43 magnesium alloy, Surf. Coat. Technol., 2006, 200(12–13): 4136.
Deflorian F., Rossi S., and Fedrizzi L., Silane pre-treatments on copper and aluminium, Electrochem. Acta, 2006, 51(27): 6097.
Chen M.A., Yang X., Zhang X.M., Li H.Z., Lu X.B., and Liu C.R., Structure and corrosion resistance of self-assembled sulf-silane film on surface of Mg-Gd-Y-Zr alloy, Chin. J. Nonferrous Met. (in Chinese), 2008, 18: 24.
Zhang J., Wu C.Y, Huang F.X., and Zhang W., Surface treatment on the AZ31B magnesium alloys by silane, J. Chin. Soc. Corros. Prot. (in Chinese), 2008, 28(3): 146.
Gao Y., Xu X., Yan Z., and Xin G., High hardness alumina coatings prepared by low power plasma spraying, Surf. Coat. Technol., 2002, 154(2–3): 189.
Shan F.J., Liu C.S., Wang S.H., and Qi G.C., Corrosion resistance of hot dip galvanized steel pretreated with bis-functional silanes modified with nanoalumina, Acta Metall. Sin., 2008, 21(4): 245.
Mohseni M., Mirabedini M., Hashemi M., and Thompson G.E., Adhesion performance of an epoxy clear coat on aluminum alloy in the presence of vinyl and amino-silane primers, Prog. Org. Coat., 2006, 57(4): 307.
Zand B.N. and Mahdaian M., Evaluation of the effect of vinyltrimethoxysilane on corrosion resistance and adhesion strength of epoxy coated AA1050, Electrochim. Acta, 2007, 52(23): 6438.
Zeng R.C., Han E.H., and Ke W., Corrosion of artificial aged magnesium alloy AZ80 in 3.5 wt.% NaCl solution, J. Mater. Sci. Technol., 2007, 23(3): 363.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Zeng, R., Chen, J., Kuang, J. et al. Influence of silane on corrosion resistance of magnesium alloy AZ31 with thermally sprayed aluminum coatings. Rare Metals 29, 193–197 (2010). https://doi.org/10.1007/s12598-010-0033-3
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12598-010-0033-3