Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Electrochemical behavior of Calcium Titanate Coated Ti-6Al-4V Substrate in Artificial Saliva

  • Lee, Byoung-Cheon (Department of Materials Engineering, Paichai University) ;
  • Balakrishnan, A. (Department of Materials Engineering, Paichai University) ;
  • Ko, Myung-Won (Department of Materials Engineering, Paichai University) ;
  • Choi, Je-Woo (Department of Materials Engineering, Paichai University) ;
  • Park, Joong-Keun (Department of Materials Science & Engineering, KAIST) ;
  • Kim, Taik-Nam (Department of Materials Engineering, Paichai University)
  • Published : 2008.01.31
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Abstract

In this study, calcium titanate $(CaTiO_3)$ gel was prepared by mixing calcium nitrate and titanium isopropoxide in 2-methoxy-ethanol. $CaTiO_3$ gel was single-layer coated on Ti-6Al-4V using a sol-gel dip-coating technique. The coating was calcined at $750^{\circ}C$ in air by utilizing a very slow heating rate of $2^{\circ}C/min$. The crystalline phases of the coating were characterized by x-ray diffraction using a slow scan rate of $1^{\circ}/min$. The morphology of the coating was analyzed by scanning electron microscopy. The corrosion behavior of Ti-6Al-4V samples coated with $CaTiO_3$ films were tested in an artificial saliva solution by potentiodynamic polarization and were quantified by the Tafel extrapolation method. The electrochemical parameters showed a considerable increase in the corrosion resistance for the $CaTiO_3$-coated Ti-6Al-4V samples compared to bare substrates.

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References

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