Artículos de revistas
New material for orthopedic implants: Electrochemical study of nickel free P558 stainless steel in minimum essential medium
Fecha
2010Registro en:
MATERIALS LETTERS, v.64, n.13, p.1476-1479, 2010
0167-577X
10.1016/j.matlet.2010.03.066
Autor
JAIMES, Ruth Flavia Vera Villamil
AFONSO, Monica Luisa Chaves de Andrade
ROGERO, Sizue Otta
AGOSTINHO, Silvia Maria Leite
BARBOSA, Celso Antonio
Institución
Resumen
Nickel, a component of stainless steels (SS) applied in orthopedic implants may cause allergic processes in human tissues P558 nickel free SS was studied to verify its viability as a substitute for stainless steel containing nickel Its performance is compared to ISO 5832-9 and F138 most used nowadays grades in implants fabrications, in minimum essential medium. MEM, at 37 degrees C. Potentiodynamic polarization curves, electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM) and ""in vitro"" cytotoxicity were used as techniques. From the electrochemical point of view P558 SS is comparable to ISO 5832-9 SS in MEM It remains passivated until the transpassivation potential, above which generalized corrosion occurs F138 presents pitting corrosion at 370 mV/SCE. The cytotoxicity results showed that P558. ISO 5832-9 and F138 do not present cytotoxic character Therefore, these results suggest that P558 SS can be applied in orthopedic implants (C) 2010 Elsevier BV All rights reserved