Abstract
The influence of pre-oxidation on the liquid zinc corrosion resistance of high Nb-TiAl alloys was investigated. The pre-oxidation was performed by heating the specimens, buried in silica powder and encapsulated in a silica tube under a vacuum of 1.3×10−3 Pa at 950°C for 12 h. Experimental results showed that the preoxidized sample exhibited much higher liquid zinc corrosion resistance than that for the comparative samples. This excellent liquid zinc corrosion resistance was attributed to the formation of high-quality oxide scale during peroxidation. The corrosion of all the samples in liquid zinc was caused by a localized breakdown in the oxide scales. The continuous and dense oxide scale formed during preoxidation substantially may prevent the liquid zinc from diffusing to the substrate, and its good continuity may also reduce the possibility of localized breakdown in the oxide scale.
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References
Seonga B G, Hwanga S Y, Kim M C, et al. Reaction of WC/Co coating with molten zinc in a zinc pot of a continuous galvanizing line. Surf Coat Technol, 2001, 138: 101–110
Zhang K, Battiston L. Friction and wear characterization of some cobalt- and iron-based superalloys in zinc alloy baths. Wear, 2002, 252: 332–344
Zhang K, Battiston L. Sliding wear of various materials in molten zinc. Mater Sci Tech, 2002, 18: 1551–1560
Kekare S A, Aswath P B. Oxidation of TiAl based intermetallics. J Mater Sci, 1997, 32: 2485–2499
Dimiduk D M. Gamma titanium aluminide alloys-an assessment within the competition of aerospace structural materials. Mater Sci & Eng A, 1999, 263: 281–288
Lin J P, Zhao L L, Li G Y, et al. Effect of Nb on oxidation behavior of high Nb containing TiAl alloys. Intermetallics, 2011, 19: 131–136
Wang W J, Lin J P, Wang Y L, et al. Isothermal corrosion TiAl-Nb alloy in liquid zinc. Mater Sci & Eng A, 2007, 452: 194–201
Taniguchi S, Shibata T, Murakami A, et al. Improvement in the oxidation resistance of TiAl by preoxidation in a TiO2-powder pack. Oxid Met, 1994, 42: 17–29
Taniguchi S, Shibata T, Murakami A. Improvement in the oxidation resistance of TiAI by preoxidation in a SiO2-powder pack. Oxid Met, 1994, 41: 103–113
Zhao L L, Li G Y, Zhang L Q, et al. Influence of Y addition on the long time oxidation behaviors of high Nb containing TiAl alloys at 900°C. Intermetallics, 2010, 18: 1586–1596
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Sun, P., Zhang, L., Zhang, L. et al. Improvement in the liquid zinc corrosion resistance of high Nb-TiAl alloys by pre-oxidation in a SiO2-powder pack. Sci. China Technol. Sci. 55, 505–509 (2012). https://doi.org/10.1007/s11431-011-4700-x
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DOI: https://doi.org/10.1007/s11431-011-4700-x