Kinetics of anodic oxide-film growth on titanium-I. Acid media

  • Ammar I
  • Kamal I
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Abstract

Studies on the kinetics of anodic oxidation of Ti are made in H2SO4, HNO3HCl and H3PO4solutions of varying concentration. Charging curves are measured at constant cd. Formation rates, and reciprocal capacitance data are reported as functions of the polarizing cd. The exponential relation between ion cd and electric field is also applicable in acid solutions. Values are recorded for the electrolytic parameters A and B. Potential/log (cd) relations are constructed at constant time of polarization, and at constant Q, where Q is the charge passed. While the slope is a function of cd in the first set, linear relations are obtained at constant Q. These allow the calculation of estimates of the pre-immersion oxide thickness. Measurements at high cds indicate breakdown potentials of about 100 V. © 1971.

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Authors

  • I. A. Ammar

  • I. Kamal

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