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Article Dans Une Revue Oxidation of Metals Année : 2016

Corrosion of Pure Cr and Ni-30Cr Alloy by Soda-Lime-Silicate Melts: Study of Simplified Systems

Carine Petitjean
Pierre-Jean Panteix
Eric Schmucker
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Christophe Rapin
Michel Vilasi

Résumé

The corrosion characteristics of model chromia-forming alloys (i.e. pure Cr and Ni-30 wt%Cr alloy) were studied in molten soda-lime-silicate (i.e. Na2O-CaO-xSiO(2), x = 3 or 6, molar composition) at 1100 and 1150 A degrees C using electrochemical techniques coupled with ex situ observations. High Cr activity of pure Cr led to high corrosion rates and also the inability of the material to develop a long term protective oxide scale after a preoxidation treatment. By contrast, the Cr2O3 scale built on preoxidized Ni-30Cr exhibited a protective behavior at 1100 A degrees C. The variation of basicity of the silicate melts showed a minor influence on the corrosion behavior of both materials. An increase in the temperature up to 1150 A degrees C led to higher solubility of Cr2O3, and thus did not allow the growth of a protective oxide scale on Ni-30Cr.
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Dates et versions

hal-01295110 , version 1 (30-03-2016)

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Citer

T. K. Abdullah, Carine Petitjean, Pierre-Jean Panteix, Eric Schmucker, Christophe Rapin, et al.. Corrosion of Pure Cr and Ni-30Cr Alloy by Soda-Lime-Silicate Melts: Study of Simplified Systems. Oxidation of Metals, 2016, 85 (1-2, SI), pp.3-16. ⟨10.1007/s11085-015-9571-2⟩. ⟨hal-01295110⟩
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