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Corrosão e Protecção de Materiais

versão impressa ISSN 0870-1164

Resumo

CARVALHO, Ricardo  e  BRETT, Christopher M. A.. Influence of mucin on the corrosion mechanism of dental amalgams in artificial saliva. Corros. Prot. Mater. [online]. 2008, vol.27, n.4, pp.108-113. ISSN 0870-1164.

In this work the influence of adsorption of mucin protein on the surface properties and on the corrosion behaviour of the high-copper dental amalgam Tytin® has been studied. Different concentrations of mucin, in a solution of an inorganic, artificial saliva of high ionic concentration, were studied for immersion times of 4 hours and for longer immersion times up to 96 hours. Techniques used were open circuit potential and its variation with time, polarisation curves and electrochemical impedance spectroscopy. Evidence was found for the adsorption of mucin on the amalgam surface and also for its role in the prevention of the formation of a passive oxide layer.

Palavras-chave : High Copper Dental Amalgams; Proteins; Mucin; Corrosion.

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