In vitro corrosion evaluation of nitrogen ion implanted titanium in simulated body fluid |
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| Authors: | T Sundararajan U Kamachi Mudali K G M Nair S Rajeswari M Subbaiyan |
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| Affiliation: | 1. Department of Analytical Chemistry, University of Madras, Guindy Campus, Madras–600 025 (India);2. Metallurgy and Materials group, Indira Gandhi Center for Atomic Research, Kalpakkam–603 102 (India) |
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| Abstract: | Surface modification of commercially pure (CP) titanium was attempted by nitrogen ion implantation to investigate corrosion resistance in simulated body fluid. Nitrogen ion was implanted at 70 keV energy for different doses ranging from 5 × 1015 to 2.5 × 1017 ions/cm2. In Vitro Open Circuit Potential (OCP-time measurements and cyclic polarization studies were carried out to evaluate the corrosion resistance of the implanted specimens with reference to the unimplanted one. Specimens implanted at 4 × 1016 and 7 × 1016 ions/cm2 showed optimum corrosion resistance, and implantation beyond this dose deteriorated the corrosion resistance. Gracing Incidence X-ray diffraction (GIXD) was employed on implanted specimens to understand the phases formed with increasing doses. The results of the present investigation indicated that nitrogen ion implantation can be used as a viable method for improving corrosion resistance of titanium. Nature of the surface and reason for the variation and improvement in corrosion resistance are discussed in detail. |
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