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Corrosion and tribocorrosion of hafnium in simulated body fluids
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.
Institute of Engineering Thermofluids, Surfaces and Interfaces, School of Mechanical Engineering, Universiy of Leeds.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0001-8676-8819
2014 (English)In: Journal of Biomedical Materials Research. Part B - Applied biomaterials, ISSN 1552-4973, E-ISSN 1552-4981, Vol. 102, no 6, p. 1157-1164Article in journal (Refereed) Published
Abstract [en]

Hafnium is a passive metal with good biocompatibility and osteogenesis, however, little is known about its resistance to wear and corrosion in biological environments. The corrosion and tribocorrosion behavior of hafnium and commercially pure (CP) titanium in simulated body fluids were investigated using electrochemical techniques. Cyclic polarization scans and open circuit potential measurements were performed in 0.9% NaCl solution and 25% bovine calf serum solution to assess the effect of organic species on the corrosion behavior of the metal. A pin-on-plate configuration tribometer and a three electrode electrochemical cell were integrated to investigate the tribocorrosion performance of the studied materials. The results showed that hafnium has good corrosion resistance. The corrosion density currents measured in its passive state were lower than those measured in the case of CP titanium; however, it showed a higher tendency to suffer from localized corrosion, which was more acute when imperfections were present on the surface. The electrochemical breakdown of the oxide layer was retarded in the presence of proteins. Tribocorrosion tests showed that hafnium has the ability to quickly repassivate after the oxide layer was damaged; however, it showed higher volumetric loss than CP titanium in equivalent wear-corrosion conditions

Place, publisher, year, edition, pages
2014. Vol. 102, no 6, p. 1157-1164
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Research subject
Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-10338DOI: 10.1002/jbm.b.33097ISI: 000339106300005PubMedID: 24376175Scopus ID: 2-s2.0-84904012253Local ID: 9221205b-4b6a-4072-a638-de57da535697OAI: oai:DiVA.org:ltu-10338DiVA, id: diva2:983280
Note
Validerad; 2014; 20140102 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Sin, Jorge RituertoEmami, Nazanin

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