Optimization of Alumina Ceramics Corrosion Resistance in Nitric Acid
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Energoatest Zaštita d.o.o., Potočnjakova 4, HR-10000 Zagreb, Croatia
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Department of Materials, Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, HR-10000 Zagreb, Croatia
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Department of Industrial Engineering, Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, HR-10000 Zagreb, Croatia
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Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, HR-10000 Zagreb, Croatia
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Authors to whom correspondence should be addressed.
Academic Editor: Andrzej Dzierwa
Materials 2022, 15(7), 2579; https://doi.org/10.3390/ma15072579
Received: 12 March 2022
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Revised: 28 March 2022
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Accepted: 30 March 2022
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Published: 31 March 2022
(This article belongs to the Special Issue Friction and Wear of Materials Surfaces)
The development of ceramic materials resistance in various aggressive media combined with required mechanical properties is of considerable importance for enabling the wider application of ceramics. The corrosion resistance of ceramic materials depends on their purity and microstructure, the kind of aggressive media used and the ambient temperature. Therefore, the corrosion resistance of alumina ceramics in aqueous HNO3 solutions of concentrations of 0.50 mol dm−3, 1.25 mol dm−3 and 2.00 mol dm−3 and different exposure times—up to 10 days—have been studied. The influence of temperature (25, 40 and 55 °C) was also monitored. The evaluation of Al2O3 ceramics corrosion resistance was based on the concentration measurements of eluted Al3+, Ca2+, Fe3+, Mg2+, Na+ and Si4+ ions obtained by inductively coupled plasma atomic emission spectrometry (ICP-AES), as well as density measurements of the investigated alumina ceramics. The response surface methodology (RSM) was used for the optimization of parameters within the experimental “sample-corrosive media” area. The exposure of alumina ceramics to aqueous HNO3 solutions was conducted according to the Box–Behnken design. After the regression functions were defined, conditions to achieve the maximum corrosion resistance of the sintered ceramics were determined by optimization within the experimental area.
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Keywords:
alumina ceramic; corrosion; response surface methodology
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MDPI and ACS Style
Ropuš, I.; Ćurković, L.; Cajner, H.; Rončević, S. Optimization of Alumina Ceramics Corrosion Resistance in Nitric Acid. Materials 2022, 15, 2579. https://doi.org/10.3390/ma15072579
AMA Style
Ropuš I, Ćurković L, Cajner H, Rončević S. Optimization of Alumina Ceramics Corrosion Resistance in Nitric Acid. Materials. 2022; 15(7):2579. https://doi.org/10.3390/ma15072579
Chicago/Turabian StyleRopuš, Ivana, Lidija Ćurković, Hrvoje Cajner, and Sanda Rončević. 2022. "Optimization of Alumina Ceramics Corrosion Resistance in Nitric Acid" Materials 15, no. 7: 2579. https://doi.org/10.3390/ma15072579
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