| Issue |
MATEC Web Conf.
Volume 370, 2022
2022 RAPDASA-RobMech-PRASA-CoSAAMI Conference - Digital Technology in Product Development - The 23rd Annual International RAPDASA Conference joined by RobMech, PRASA and CoSAAMI
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|---|---|---|
| Article Number | 06008 | |
| Number of page(s) | 9 | |
| Section | Process Development | |
| DOI | https://doi.org/10.1051/matecconf/202237006008 | |
| Published online | 01 December 2022 | |
The electrochemical corrosion behaviour of Ti-48Al-2Nb-0.7Cr-0.3Si alloy in 3.5%NaCl
1 Council of Scientific Industrial Research, Materials Science and Manufacturing, Light metals, Meiring Naude Road, P O Box 395 Pretoria, South Africa.
2 Department of Material Science and Metallurgical Engineering, Faculty of Engineering, Built Environment and Information Technology, University of Pretoria, South Africa.
3 Department of Physics, University of the Western Cape, Private Bag X 17, Bellville 7535, South Africa
* Corresponding author: magogodistevens@gmail.com
Titanium aluminides (TiAl) have attracted industrial interest, particularly for high temperature applications owing to their promising mechanical properties. Due to the application of these materials to the marine environment it is therefore important to understand their performance under such conditions. In this study, the corrosion behaviour of Ti-48Al-2Nb-0.7Cr-0.3Si alloy produced by vacuum arc melting was investigated using the potentiodynamic polarization method. The corroded surface and Ti-Al phases were investigated by scanning electron microscopy (SEM), optical microscopy, and X-ray diffraction (XRD). Hardness was examined by a Vickers micro hardness tester with a diamond indenter. Pitting was observed to occur within the surface defects and caused severe corrosion.
© The Authors, published by EDP Sciences, 2022
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