Effect of TiB2 on the Corrosion Resistance Behavior of In Situ Al Composites

This research focuses on a detailed investigation for understanding the corrosion behavior of A356 Al alloy-based metal matrix composites reinforced with in situ TiB 2 particles. The aforesaid newer composite samples were fabricated by adopting in situ technique using halide salts by stir casting ro...

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Bibliographic Details
Published in:International journal of metalcasting 2020, Vol.14 (1), p.84-91
Main Authors: Senthil Kumar, P., Kavimani, V., Soorya Prakash, K., Murali Krishna, V., Shanthos Kumar, G.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Materials Science
Metallic Materials
Structural Materials
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Summary:This research focuses on a detailed investigation for understanding the corrosion behavior of A356 Al alloy-based metal matrix composites reinforced with in situ TiB 2 particles. The aforesaid newer composite samples were fabricated by adopting in situ technique using halide salts by stir casting route under various pouring temperatures of 750 °C, 780 °C and 810 °C maintained at a constant holding time of 20 min. The so-developed Al MMC samples were then subjected to microstructure and electrochemical studies. Surface morphology of samples showcases for the formation of TiB 2 particles over and above the surface of fabricated composite specimens. Corrosion behavior of the samples were investigated exhaustively by using Tafel polarization and electrochemical impedance spectroscopy under 3.5 wt% NaCl solution. The attained results depict that whenever there is a gradual increase in pouring temperature, substantial improvement in the corrosion resistance of developed samples is also evidenced.
ISSN:1939-5981
2163-3193
DOI:10.1007/s40962-019-00330-3