TY - JOUR
T1 - Effects of Sr incorporation on surface structure and corrosion resistance of hydroxyapatite coated Mg-4Zn alloy for biomedical applications
AU - ZHAO, Da peng
AU - SHI, Wei
AU - SHANG, Peng
AU - NIE, He min
AU - ZHANG, Yuan
AU - TANG, Jin cheng
N1 - Publisher Copyright:
© 2018 The Nonferrous Metals Society of China
PY - 2018/8
Y1 - 2018/8
N2 - Hydroxyapatite (HA) and strontium (Sr) incorporated HA coatings with different Sr contents were prepared on Mg-4Zn substrates by electrochemical deposition method. Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and electrochemical workstation were applied for the composition, phase constitution, morphology analyses and corrosion tests. The results reveal that the incorporation of Sr in coatings does not lead to dramatical change of functional groups and the crystal structure of the HA phase, but the crystal size and crystallinity decrease with increasing Sr content, which should be attributed to the lattice distortion and different occupancies of Sr and Ca ions. The 10SrHA@Mg-4Zn samples show the lowest corrosion current density and the highest corrosion potential, and also exhibit the lowest amount of hydrogen evolution among all coated samples.
AB - Hydroxyapatite (HA) and strontium (Sr) incorporated HA coatings with different Sr contents were prepared on Mg-4Zn substrates by electrochemical deposition method. Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and electrochemical workstation were applied for the composition, phase constitution, morphology analyses and corrosion tests. The results reveal that the incorporation of Sr in coatings does not lead to dramatical change of functional groups and the crystal structure of the HA phase, but the crystal size and crystallinity decrease with increasing Sr content, which should be attributed to the lattice distortion and different occupancies of Sr and Ca ions. The 10SrHA@Mg-4Zn samples show the lowest corrosion current density and the highest corrosion potential, and also exhibit the lowest amount of hydrogen evolution among all coated samples.
KW - Mg-4Zn alloy
KW - corrosion resistance
KW - electrochemical polarization
KW - strontium-incorporated hydroxyapatite
UR - http://www.scopus.com/inward/record.url?scp=85054354814&partnerID=8YFLogxK
U2 - 10.1016/S1003-6326(18)64798-3
DO - 10.1016/S1003-6326(18)64798-3
M3 - 文章
AN - SCOPUS:85054354814
SN - 1003-6326
VL - 28
SP - 1563
EP - 1570
JO - Transactions of Nonferrous Metals Society of China (English Edition)
JF - Transactions of Nonferrous Metals Society of China (English Edition)
IS - 8
ER -