Open AccessPreparation and Characterization of Hydroxyapatite Coating on AZ31 Mg Alloy for Implant Applications
Author(s) -
S. A. Salman,
Kensuke Kuroda,
Masazumi Okido
Publication year - 2013
Publication title -
bioinorganic chemistry and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.865
H-Index - 35
eISSN - 1565-3633
pISSN - 1687-479X
DOI - 10.1155/2013/175756
Subject(s) - biocompatibility , corrosion , magnesium , coating , apatite , simulated body fluid , magnesium alloy , alloy , biodegradation , chemistry , metal , immersion (mathematics) , metallurgy , chemical engineering , materials science , nanotechnology , mineralogy , organic chemistry , mathematics , pure mathematics , engineering
Magnesium alloys as biodegradable metal implants in orthopaedic research received a lot of interest in recent years. They have attractive biological properties including being essential to human metabolism, biocompatibility, and biodegradability. However, magnesium can corrode too rapidly in the high-chloride environment of the physiological system, loosing mechanical integrity before the tissue has sufficiently healed. Hydroxyapatite (HAp) coating was proposed to decrease the corrosion rate and improve the bioactivity of magnesium alloy. Apatite has been cathodically deposited on the surface of Mg alloy from solution that composed of 3 mM Ca(H 2 PO 4 ) 2 and 7 mM CaCl 2 at various applied potentials. The growing of HAp was confirmed on the surface of the coatings after immersion in SBF solution for 7 days. The coating obtained at −1.4 V showed higher corrosion resistance with bioactive behaviors.
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