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Preparation of nanosized porous oxide layers on titanium by asymmetric AC electrolysis in sulfuric acid

Published online by Cambridge University Press:  29 January 2019

Noriyuki Y. Iwata*
Department of Materials Science and Engineering, National Institute of Technology, Kurume College, 1-1-1 Komorino, Kurume, Fukuoka 830-8555, Japan
Shin-ichi Tanaka
Department of Materials Science and Engineering, National Institute of Technology, Kurume College, 1-1-1 Komorino, Kurume, Fukuoka 830-8555, Japan
Yuriko Fukushima
Advanced Engineering School, National Institute of Technology, Kurume College, 1-1-1 Komorino, Kurume, Fukuoka 830-8555, Japan
Gregory Jerkiewicz
Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, ON. K7L 3N6, Canada
Address all correspondence to N.Y. Iwata at
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The formation of nanosized porous oxide layers on titanium (Ti) by asymmetric alternating current anodizing in sulfuric acid has been studied using electrochemical techniques. In order to prevent spark discharge at Ti electrode upon its anodization in 1.0 M H2SO4 solution, the magnitude of the cathodic current is reduced using a special electrical circuit consisting of a variable resistor and two diodes. The unique surface treatment approach gives rise to the formation of nanosized porous layer in a very short period of time and without spark discharge. The surface of porous layers thus obtained has in vitro apatite-forming ability.

Research Letters
Copyright © Materials Research Society 2019 

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