Abstract No.:	2579
Title:	Densification of low temperature HVOF Ti coating and its electrochemical characterizations
Authors:	ChunMing Deng / Guangdong Institute of New Materials, P.R. China Min Liu / GuangZhou research institute of nonferrous metals, china Jian-Qiang Chen/ GuangZhou research institute of nonferrous metals, china Ke-Song Zhou/ GuangZhou research institute of nonferrous metals, china
Abstract:	Fundamental properties of Titanium coating prepared by low temperature HVOF process aided by injection of water had been published by our research group. The results showed that low temperature HVOF process provided as a good means for the deposition of comparatively dense Ti coating, however the interconnected pores observed in Ti coating degraded corrosion resistance of Ti coating, therefore it was necessary to manufacture denser Ti coating. Two processes were respectively applied for the densification of Ti coating. One process was to perform post heat treatment for as-sprayed Ti coating with conventional Ti powder as feedstock. The other process was to modify thermal spray powder. Ti powder mixing with spherical alumina powder was used to deposit denser Ti coating as a result of shot peening effect of hard alumina powder. Finally the corrosion resistance for densified Ti coatings was evaluated by electrochemical characterization.

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