Behavior of a Co-Cr-Mo Biomaterial in Simulated Body Fluid Solutions Studied by Electrochemical and Surface Analysis Techniques
نویسندگان
چکیده
O comportamento do biomaterial Co-Cr-Mo (usado em próteses dentárias) em saliva artificial (AFNOR S90-701), saliva artificial com temperatura e pH modificados e contendo fluoreto foi estudado por técnicas eletroquímicas (potencial de circuito aberto e polarização potenciodinâmica) e de análise de superfície (Microscopia Eletrônica de Varredura (MEV) e Espectroscopia de Energia Dispersiva (EED)). Os resultados revelaram que a morfologia da superfície após a polarização potenciodinâmica é heterogênea, exibindo três regiões de composição distinta. Espécies solúveis como CrO 4 2– foram liberadas para a solução durante a polarização. A temperatura e o pH da solução exerceram influência acentuada sobre a cinética de dissolução do biomaterial, enquanto que a presença de fluoreto não alterou as características do sistema.
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