Abstract
This paper describes the influence of sodium-containing contaminants on the corrosion of Si3N4 in a combustion exhaust gas. The ceramic, containing 9% (by weight) Y2O3 was exposed to the salt contaminated gas in a low-velocity burner rig in the temperature range 800°C to 1300°C. Below 1000°C, the compound Na2SO4 was continuously deposited on specimen surfaces throughout exposure. Nevertheless, a protective silicon-rich oxide surface scale was formed. No deposition occurred at temperatures above 1000°C, where sodium played a more active role in the corrosion process. Specific aspects of the test methodology are addressed and the results of burner rig corrosion tests are presented.
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Baxter, D. (1994). Burner RIG Hot-Salt Corrosion of Si3N4 in the Temperature Range 800°C to 1300°C. In: Nickel, K.G. (eds) Corrosion of Advanced Ceramics. NATO Science Series E: (closed), vol 267. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-1182-9_19
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DOI: https://doi.org/10.1007/978-94-011-1182-9_19
Publisher Name: Springer, Dordrecht
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