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In vitro corrosion evaluation of nitrogen ion implanted titanium in simulated body fluid
Author(s) -
Sundararajan T.,
Kamachi Mudali U.,
Nair K. G. M.,
Rajeswari S.,
Subbaiyan M.
Publication year - 1999
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/(sici)1521-4176(199906)50:6<344::aid-maco344>3.0.co;2-4
Subject(s) - corrosion , titanium , ion , nitrogen , ion implantation , simulated body fluid , materials science , plasma immersion ion implantation , nuclear chemistry , analytical chemistry (journal) , metallurgy , chemistry , composite material , scanning electron microscope , chromatography , organic chemistry
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 × 10 15 to 2.5 × 10 17 ions/cm 2 . 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 × 10 16 and 7 × 10 16 ions/cm 2 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.