RT info:eu-repo/semantics/article
T1 Surface chemistry, film morphology, global, local electrochemical behavior and cytotoxic response of anodized AZ31B magnesium alloy
A1 Souto, Ricardo Manuel
A1 Oliveira, L.A. de
A1 Da Silva, Rejane Maria P.
A1 Rodas, A.C.D.
A1 Antunes, R.A.
A2 Química
A2 Grupo de Electroquímica y Corrosión
Instituto de Materiales y Nanotecnología
K1 AZ31B
K1 magnesium
K1 anodizing
K1 SECM
K1 SKP
AB In this work, we provide a detailed investigation on the correlation between the surfacechemistry, film morphology, global and local electrochemical behavior of the AZ31Balloy anodized under different constant current densities. The anodizing treatment wascarried out in 1.0 M NaOH and 0.5 M Na2SiO3 solution, using three different currentdensities, 5 mA.cm-2, 10 mA.cm-2 and 20 mA.cm-2. The surface morphology andthickness of the anodized layers were examined by scanning electron microscopy. Thesurface chemical states were assessed by X-ray photoelectron spectroscopy. The globalelectrochemical behavior was investigated by electrochemical impedance spectroscopyand potentiodynamic polarization. The local electrochemical activity was monitored byscanning electrochemical microscopy and scanning Kelvin probe. In vitrobiocompatibility was assessed by cytotoxicity tests. The results indicated a markedinfluence of the anodizing current density on the surface morphology and globalelectrochemical behavior of the treated samples. The surface chemistry, in turn, waslittle affected by this parameter. The best corrosion resistance was obtained for thesamples anodized at 20 mA.cm-2
YR 2020
FD 2020
LK http://riull.ull.es/xmlui/handle/915/22005
UL http://riull.ull.es/xmlui/handle/915/22005
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 09-may-2024