Corrosion and tribocorrosion behaviour of β-type Ti-Nb and Ti-Mo surfaces designed by diffusion treatments for biomedical applications. (1st August 2018)

• Record Type: Journal Article
• Authors: Ureña, J.; Tsipas, S.; Pinto, A.M.; Toptan, F.; Gordo, E.; Jiménez-Morales, A.
• Is Part Of: Corrosion science. Volume 140(2018)
• Page Start: 51
• Page End: 60
• Publication Date: 2018-08-01
• Subjects: β-Gradient titanium -- Powder technology -- Nb and Mo surface treatments -- Corrosion -- Tribocorrosion; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2018.06.024
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: Effect of Nb and Mo diffusion treatments in Ti corrosion and tribocorrosion behaviour. β-Ti gradient surfaces with Young's modulus closer to that of bone exhibited better anticorrosive properties than cp-Ti. These Ti surfaces with Nb or Mo presented lower tendency to corrosion under tribological action. The Mo + NH4 Cl diffusion resulted in the hardest surface with the best tribocorrosion behaviour. Abstract: Corrosion and tribocorrosion behaviour of modified Ti surfaces through thermochemical treatments has been studied. Electrochemical Impedance Spectroscopy (EIS) and reciprocating sliding tests using a ball-on-plate tribometer under 1 N load and alumina as counter-material were used to evaluate the influence of Nb and Mo on titanium corrosion and tribocorrosion properties. Ti-Nb and Ti-Mo surfaces exhibited better anticorrosive properties than CP-titanium. Under tribological action the modified Ti surfaces showed similar coefficient of friction and lower tendency to corrosion compared to CP-Ti. Furthermore, Nb diffusion increased the repassivation rate with respect to Ti and Ti-Mo surfaces due to its stable passive film.