Corrosion of gold alloys and titanium in artificial saliva

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Abstract
Two types of Au alloys and 1 type of pure Ti were submitted to corrosion in artificial saliva for periods of up to .apprx. 2 mo. The release of Cu, Au or Ag from the Au alloys, as well as Ti from the Ti matrix, was measured with a nuclear tracer technique. The physical/chemical state of the corrosion products of Au alloys referring to the ionic state or presence in particulate form has been examined retaining the particulate matter on a glass filter. Cu was present mainly in the ionic state. Considerable amounts of Au were observed to be retained on the glass filter, explained by the presence of Au in particulate form or as a component of a dispersed colloidal phase. The estimation of the release of Ti was registered by the tracer nuclide 46Sc, assuming particulate matter to be deteriorated from the Ti surface.

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