J. Mater. Sci. Technol. ›› 2018, Vol. 34 ›› Issue (12): 2271-2282.DOI: 10.1016/j.jmst.2018.05.005

Special Issue: Corrosion in 2018 Biomaterials 2018

• Orginal Article • Previous Articles     Next Articles

Initial formation of corrosion products on pure zinc in simulated body fluid

Lijun Liua, Yao Menga, Chaofang Dongab, YuY anb, Alex A. Volinskyc, Lu-Ning Wanga*()   

  1. a State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
    b Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China
    c Department of Mechanical Engineering, University of South Florida, Tampa, FL, 33620, USA
  • Received:2018-01-12 Revised:2018-02-25 Accepted:2018-03-13 Online:2018-12-20 Published:2018-11-15
  • Contact: Wang Lu-Ning

Abstract:

Zinc was recently suggested to be a potential candidate material for degradable coronary artery stent. The corrosion behavior of pure zinc exposed to r-SBF up to 336?h was investigated by electrochemical measurements and immersion tests. The morphology and chemical composites of the corrosion products were investigated by scanning electron microscope, grazing-incidence X-ray diffraction, X-ray photoelectron spectroscopy and Fourier transform infrared spectrometer. The results demonstrate that the initial corrosion products on the pure zinc mainly consist of zinc oxide/hydroxide and zinc/calcium phosphate compounds. The pure Zn encounters uniform corrosion with an estimated corrosion rate of 0.02-0.07?mm?y-1 during the immersion, which suggests the suitability of pure Zn for biomedical applications.

Key words: Zinc, Stent, Corrosion, Simulated body fluid