Abstract:

Objective:The purpose of this study was to investigate the effects of chemical polishing on pure titanium castings. Methods: Three groups of pure titanium castings (15 mm x 15 mm x 1.4 mm) were prepared, and each group contained 5 castings. Group A was sandblasted for 5 minutes; After sandblasted, Group B and C were polished using conventional machine-grinding and chemical- polishing method for about 60 seconds, respectively. And then the weight loss of Group B and Group C, surface roughness and thickness of oxidized membrane of all castings were measured. The effects were evaluated by naked eye examination. Results: The castings in Group C were polished chemically to mirror surface. The weight loss of the castings polished chemically was more than that polished using the conventional machine-grinding method. The Ra values were significantly different among the three groups. The metalloscopy indicated that the surface was evenly covered with a layer of oxidized membrane of 8 fan after polishing. Conclusion : The chemical polishing of pure titanium castings is efficient method, which can be available in clinic.

Key words: pure titanium, surface roughness, weightloss ratio, chemical polishing