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The effect of MEVVA ion implantation of Zr on the corrosion behaviour of PVD TiN coatings |
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| Authors: | K.P. Purushotham N. Brack P. Evans R.R. Manory |
| Affiliation: | a Guest Scientist, Nanometrology Group, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD 20899, United States b School of Civil and Chemical Engineering, RMIT University, GPO Box 2476V, Melbourne, Vic 3001, Australia c School of Physics, LaTrobe University, Melbourne, Australia d Australian Nuclear Science and Technology Organisation, Private Mail Bag 1, Menai, NSW 2234, Australia e M&H Materials, 4/485 New Street, Brighton, Vic 3186, Australia |
| Abstract: | The use of TiN coatings as corrosion barriers is limited by the presence of defects such as pin-holes. In this study Zr ions were implanted into PVD deposited TiN coatings at varying doses, to improve the corrosion resistance. The corrosion behaviour was assessed in saline environments using linear polarisation techniques and the corroded surface of the coatings characterised using XPS and SEM. Overall, ion implantation resulted in an increase in the coating’s corrosion resistance. Protection was attributed to closure of existing pin-holes and the formation of various nitrides, oxides and oxynitrides of Ti and Zr. |
| Keywords: | A. Ceramic A. Zirconium B. Ion Implantation B. Polarisation B. XPS |
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