Abstract
Anodic oxidation of titanium in sulphuric acid has been studied. Morphological changes of the electrode were imaged in situ with scanning force microscopy in the 1–5 μm range. The surface roughness decreases with increasing potential. Mass changes due to dissolution of Ti and the subsequent growth of the passive film were recorded by using an electrochemical quartz crystal microbalance (EQCM). These measurements represent the first use of the EQCM with glued foil electrodes to study the dissolution of an active metal and the growth of thin passive films. The results indicate a complex oxide formation mechanism.
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