Journals Proceedings

Abstract

Anodic oxidation (AO) is a chemically electrode reactions between electric field driven metal and oxygen ion diffusion to the formation of an oxide film on anode surface. This method able to modified the oxide layer of titanium (Ti) from smooth (bioinert) to porous surface (bioactive) by thickening the oxide film which enhance osseointegration and corrosion resistance of the Ti. This paper presents a study of surface characterisations of anodised titanium in sulphuric acid (H2SO4) formed via anodic oxidation. Anodic films were obtained by using AO method in sulphuric acid, where the concentration and voltage were varied in the range of 0.3-1.8 M and 50-200 V respectively. The samples are examined by using X-ray diffractometer (XRD), field emission scanning electron microscopy (FESEM) and atomic force microscopy (AFM). From XRD analysis, oxide conversion is identified from very small amount of anatase (50 V) to high crystallinity of anatase at 100 V and mixture of anatase and rutile at 200 V. The FESEM results show that the surface of titanium changed from smooth to rough surface by increasing the applied voltage and concentration of electrolyte. The surface roughness (Ra) of anodic titanium increased with increment of the voltage and concentration of sulphuric acid.