Synthesis and characterization of sol–gel derived glass-ceramic and its corrosion protection on 316L SS |
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Authors: | U. Vijayalakshmi S. Rajeswari |
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Affiliation: | (1) Department of Analytical chemistry, University of Madras, Guindy Campus, Chennai, 600 025, India |
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Abstract: | Glass-ceramic was prepared by sol–gel method using Ca(NO3)2·4H2O and P2O5 as Ca and P precursors, respectively. In order to improve the bioactivity of the implant material, glass-ceramic (β-Ca2P2O7) coating was developed on 316L SS substrate by spin coating method. Coating was annealed at different temperatures and its corrosion resistance was evaluated by electrochemical polarization and impedance analysis using Ringer’s solution as electrolyte. The results from the present study, show excellent corrosion resistance for coated 316L SS, corroborated by the high values of charge transfer resistance from impedance analysis and higher breakdown and repassivation potential with the corresponding lower current density from polarization measurements. Based on the results, the glass-ceramic coating on 316L SS can be considered as a corrosion resistant material. |
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Keywords: | Sol– gel Glass-ceramic Corrosion Impedance |
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