title: Electrochemical behavior of near-beta titanium biomedical alloys in phosphate buffer saline solution.
abstract: The electrochemical behavior of three different near-β titanium alloys (composed by Ti, Nb and Sn) obtained by powder metallurgy for biomedical applications has been investigated. Different electrochemical and microscopy techniques were used to study the influence of the chemical composition (Sn content) and the applied potential on the microstructure and the corrosion mechanisms of those titanium alloys. The addition of Sn below 4wt.% to the titanium powder improves the microstructural homogeneity and generates an alloy with high corrosion resistance with low elastic modulus, being more suitable as a biomaterial. When the Sn content is above 4%, the corrosion resistance considerably decreases by increasing the passive dissolution rate; this effect is enhanced with the applied potential.
authors.affiliation: Institute for Industrial, Radiophysical and Environmental Safety Universidad Politécnica de Valencia, P.O. BOX 22012, E-46071 Valencia, Spain. Electronic address: aldalbor@posgrado.upv.es.
authors.forename: A
authors.initials: A
authors.lastname: Dalmau
authors.affiliation: Institute for Industrial, Radiophysical and Environmental Safety Universidad Politécnica de Valencia, P.O. BOX 22012, E-46071 Valencia, Spain.
authors.forename: V
authors.initials: V
authors.lastname: Guiñón Pina
authors.affiliation: Institute of Materials Technology, Universidad Politécnica de Valencia, P.O. BOX 22012, E-46071 Valencia, Spain.
authors.forename: F
authors.initials: F
authors.lastname: Devesa
authors.affiliation: Institute of Materials Technology, Universidad Politécnica de Valencia, P.O. BOX 22012, E-46071 Valencia, Spain.
authors.forename: V
authors.initials: V
authors.lastname: Amigó
authors.affiliation: Institute for Industrial, Radiophysical and Environmental Safety Universidad Politécnica de Valencia, P.O. BOX 22012, E-46071 Valencia, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Igual Muñoz
mesh_terms: D000497:Alloys / Q000737:chemistry*; D001672:Biocompatible Materials / Q000737:chemistry; D002021:Buffers; D003343:Corrosion; D055664:Electrochemical Techniques; D008422:Materials Testing / Q000379:methods; D009556:Niobium / Q000737:chemistry; D010710:Phosphates; D012996:Solutions; D014001:Tin / Q000737:chemistry; D014025:Titanium / Q000737:chemistry*
chemical_list: D000497:Alloys; D001672:Biocompatible Materials; D002021:Buffers; D010710:Phosphates; D012996:Solutions; C023988:beta titanium; D009556:Niobium; D014001:Tin; D014025:Titanium
keywords: Biomaterials; Corrosion; Electrochemical impedance spectroscopy (EIS); Near-β titanium alloys; Passivation