Corrosion behaviour of niobium in phosphate buffered saline solutions with different concentrations of bovine serum albumin

Wei Wang, Farzad Mohammadi, Akram Alfantazi

Research output: Contribution to journalArticlepeer-review

92 Scopus citations

Abstract

The corrosion behaviour of Nb was studied in phosphate buffered saline (PBS) solutions at a presence of 0-6gL -1 bovine serum albumin (BSA). Addition of BSA to PBS solutions lowered the open circuit potential (OCP). OCP, polarization resistance and impedance increased over immersion time. The adsorption process of BSA on Nb surface was found to be faster than that of the PO 4 3-. According to X-ray Photoelectron Spectroscopy (XPS) a competitive adsorption between PO 4 3- and BSA was in effect during the immersion process. Based on the analysis of effective capacitances, a surface distribution of time-constants was proposed.

Original languageBritish English
Pages (from-to)11-21
Number of pages11
JournalCorrosion Science
Volume57
DOIs
StatePublished - Apr 2012

Keywords

  • A. Niobium
  • B. EIS
  • B. Polarization
  • B. XPS

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