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Corrosion behavior of bulk amorphous and crystalline Zr-based alloys in simulated body fluid with and without additions of protein
NTNU Norwegian University of Science and Technology, Norway.
RISE, Swerea, KIMAB.
NTNU Norwegian University of Science and Technology, Norway; KTH Royal Institute of Technology, Sweden.
NTNU Norwegian University of Science and Technology, Norway.
2016 (English)In: Materials and corrosion - Werkstoffe und Korrosion, ISSN 0947-5117, E-ISSN 1521-4176, Vol. 67, no 7, p. 748-755Article in journal (Refereed) Published
Abstract [en]

The main aim of the present study has been to investigate the electrochemical behavior of, and oxide film formation on, the bulk amorphous Zr55Cu30Ni5Al10 alloy and the crystalline counterpart in simulated body fluid. Different analytical methods, e.g., polarization and electrochemical impedance measurements, were used to compare the results of the samples when exposed to, phosphate buffered saline (PBS), with or without the addition of protein (albumin). Moreover, the influence of pH on the corrosion behavior of the materials was also investigated. Pitting corrosion was observed to exist on both amorphous and crystalline samples after exposure to the PBS solution, but the passivity region was much smaller for the crystalline material. The addition of protein to the PBS solution improved passive behavior and led to higher pitting potential in the case of the crystalline samples, while the pitting corrosion potential decreased slightly in the case of the amorphous samples. Furthermore, a decrease in the pH level accelerates the dissolution rate of both materials when exposed to the PBS environment, however, in the presence of albumin the pitting corrosion potential increased in the case of both materials. 

Place, publisher, year, edition, pages
Wiley-VCH Verlag , 2016. Vol. 67, no 7, p. 748-755
Keywords [en]
amorphous, BMG, crystalline, impedance, pitting corrosion, polarization curve, simulated body fluid, Zr-based alloy, Amorphous alloys, Amorphous films, Amorphous materials, Body fluids, Copper, Corrosion, Corrosive effects, Crystalline materials, Electric impedance, Oxide films, Polarization, Proteins, Zirconium alloys, Crystalline counterpart, Electrochemical behaviors, Electrochemical impedance measurements, Phosphate-buffered salines, Polarization curves, Simulated body fluids, Pitting
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-41298DOI: 10.1002/maco.201508625Scopus ID: 2-s2.0-84949294644OAI: oai:DiVA.org:ri-41298DiVA, id: diva2:1377323
Available from: 2019-12-11 Created: 2019-12-11 Last updated: 2019-12-11Bibliographically approved

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