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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    No. 3    June 2007

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Pulsed electrodeposition of hydroxyapatite on titanium substrate in solution containing hydrogen peroxide
CHEN Xing-yu(陈星宇), ZHAO Zhong-wei(赵中伟),
CHEN Ai-liang(陈爱良), LI Hong-gui(李洪桂)

School of Metallurgical Science and Engineering, Central South University,
Changsha 410083, China

Abstract:Hydroxyapatite(HAP) coatings were prepared on the titanium substrate in the electrolyte containing H2O2 by the pulse electrodeposition. The introduction of H2O2 restrains the evolution of H2 and improves the adhesive strength between coatings and substrate. The results of pulse electrodeposition show that the relaxation time of the pulse is beneficial to growth of HAP because it makes ions diffuse from bulk to the surface of electrode and reduces concentration polarization in the next pulse time. It is beneficial to the increase of the duty circle of the pulse for deposition of HAP, but the result is not good if it is increased excessively. With increasing potential, it is good for the growth of HAP coatings. If the potential is too high, it is easy for HAP coatings to drop off during the process of electrodeposition under too intensive polarization, such as −1.0 V (vs SCE), and there is not many coatings on the substrate. The combination of pulse electrodeposition and addition of hydrogen peroxide can assuredly improve the physico-chemical properties of hydroxyapatite coatings.

 

Key words: pulsed electrodeposition; potentiostatic electrodeposition; hydroxyapatite; titanium substrate; hydrogen peroxide; coatings

ISSN 1672-7029
CN 43-1423/U

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