Corrosion behaviour of porous Ti–39Nb alloy for biomedical applications

• Published in: Corrosion science Vol. 71; pp. 78 - 83
• Main Authors: Fojt, Jaroslav, Joska, Luděk, Málek, Jaroslav
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01-06-2013; Elsevier
• Subjects: A. Alloy; A. Titanium; Alloy powders; Applied sciences; B. EIS; B. Polarization; Biocompatibility; C. Crevice corrosion; Corrosion; Corrosion environments; Corrosion tests; Exact sciences and technology; Metals. Metallurgy; Porosity; Surgical implants; Titanium base alloys; C. Crevice corrosion; A. Alloy; B. EIS; B. Polarization; A. Titanium; Crevice corrosion; Impedance; Medical application; Porous metal
• ISSN: 0010-938X; 1879-0496
• DOI: 10.1016/j.corsci.2013.03.007

•Corrosion behaviour of a porous titanium-based alloy was studied.•Materials of a high porosity are susceptible to crevice corrosion.•Localization of the corrosion process increases with increasing porosity.
The presented work was aimed to describe the effect of porosity on the corrosion behaviour of Ti–39Nb alloy produced by the powder metallurgy technology, which represents a prospective material for medical applications. Corrosion properties of specimens with a porosity ranging from 0% to 33% were studied in simulated body environments, using electrochemical techniques and exposure tests. The results of measurements proved the occurrence of a localized form of corrosion in the material with a porosity of 24% and 33%. Distinct localization of the corrosion process was recorded in an environment containing fluoride ions.