Corrosion Behavior of Al₂O₃ Ceramics in the Acid and Alkaline Solutions

Abstract:

Al₂O₃ materials were used in a very wide range due to its good mechanical properties and relative low manufacture cost. The corrosion resistance of Al₂O₃ materials in acid, alkaline and sea water solutions gained more and more attention because many application situations are severe and the working life is shorten due to the corrosion. In this paper, the corrosion behavior of Al₂O₃ based materials in acid and alkaline solutions was studied and effect of corrosion time on the corrosion behavior of Al₂O₃ materials was investigated. The microstructure of as prepared Al₂O₃ materials was characterized by SEM. Possible corrosion process and mechanism was discussed in details. The results reveal that the as prepared Al₂O₃ materials show better corrosion resistance in alkaline solution than in acid solutions. In both acid and alkaline conditions, the corrosion mainly occurs in the grain boundary. Mass loss increased with increasing corrosion time, while the corrosion rate was decreased.

• Periodical: Key Engineering Materials (Volumes 512-515)
• Pages: 509-512
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.512-515.509
• Online since: June 2012
• Authors: Long Huang, Shan Shan Luo, Wen Kui Li
• Keywords: Acid Solutions, Al₂O₃, Alkaline Solutions, Corrosion Behavior

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