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Stability of Protective Oxide Layer Against Corrosion: Solubility Measurements of Chromium in Soda Lime Silicate Melts |
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| Authors: | Tuti Katrina Abdullah Carine Petitjean Pierre-Jean Panteix Christophe Rapin Michel Vilasi Zuhailawati Hussain Afidah Abdul Rahim |
| Affiliation: | 1. Départment CP2S Equipe 206 (Surface et Interface: Réactivité Chimique des Matériaux), IJL-UMR 7198, B.P. 70239, 54506, Vandoeuvre les Nancy Cedex, France 2. School of Materials and Minerals Resources Engineering, Universiti Sains Malaysia, Engineering Campus, Seri Ampangan, 14300, Nibong Tebal, Seberang Perai Selatan, Pulau Pinang, Malaysia 3. School of Chemical Sciences, Universiti Sains Malaysia, 11800, Minden, Pulau Pinang, Malaysia |
| Abstract: | The solubility of chromium oxide (Cr2O3) in soda lime silicate glasses was studied as a function of temperature (1,200 °C ≤ T ≤ 1,350 °C), oxygen fugacity (?12 ≤ log fO2 ≤ ?0.6) and glass composition (Na2O–CaO–xSiO2; x = 3, 4, 5 and 6). The fO2 was proved to induce several oxidation states of Cr for a given glass composition at a fixed temperature. The influence of glass composition on the Cr solubility was interpreted in terms of the optical basicity Λ concept. An increase in the melt basicity led to an increase in the Cr solubility for the experiments conducted under oxidizing conditions. The total dissolved Cr also showed a significant increase with increasing temperature for a given fO2 and glass composition. The results proved that the stability of Cr2O3 scale against corrosion was profoundly influenced by fO2, T and melt basicity. |
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