Ca-P Conversion Coating on AZ60 Magnesium Alloy for Biomedical Application

doi:10.1007/s40242-014-4082-2

Chemical Research in Chinese Universities ›› 2014, Vol. 30 ›› Issue (4): 543-548.doi: 10.1007/s40242-014-4082-2

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Ca-P Conversion Coating on AZ60 Magnesium Alloy for Biomedical Application

CHENG Zhongji, LIAN Jianshe, HU Xiaoli, YANG Xiaohong, LI Guangyu

Key Laboratory of Automobile Materials, Ministry of Education, College of Materials Science and Engineering, Jilin University, Changchun 130022, P. R. China

Online:2014-08-01 Published:2014-05-12
Contact: LI Guangyu E-mail:guangyu@jlu.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China(No.31070841), the National Key Basic Research and Development Program of China(No.2010CB631001) and the Science & Technology Pillar Program of Changchun City, China (No.11KZ30).

Abstract

Abstract:

To improve the anti-corrosion behaviors of magnesium alloy in the inner environment of human body, a bioactive Ca-P coating was deposited on the AZ60 magnesium alloy by a novel simple method. The morphologies of the Ca-P coatings formed under different treatment time were studied by scanning electron microscopy(SEM). The corrosion behaviors of Ca-P coating were investigated by electrochemical polarization test and electrochemical impedance spectroscopy in both 3%(mass fraction) NaCl solution and simulated body fluid(SBF). Immersion test in SBF was performed to evaluate the corrosion rate of Ca-P coated magnesium alloy. X-Ray diffraction(XRD) analysis result shows that the coating mentioned above mainly consists of dicalcium phosphate dehydrate(CaHPO₄·2H₂O, DCPD) and β-tricalcium phosphate dehydrate[β-TCP, Ca₃(PO₄)₂], which exhibits good corrosion resistance. After magnesium alloy was immersed in 1 mol/L NaOH solution at 80℃ for 2 h, hydroxyapatite [Ca₁₀(PO₄)₆(OH)₂, HA] appeared on the magnesium alloy substrate, which can further decrease the corrosion rate of AZ60 magnesium alloy in SBF.

Key words: Ca-P coating, Deposited method, Magnesium alloy, Corrosion rate, Simulated body fluid(SBF)

CHENG Zhongji, LIAN Jianshe, HU Xiaoli, YANG Xiaohong, LI Guangyu. Ca-P Conversion Coating on AZ60 Magnesium Alloy for Biomedical Application[J]. Chemical Research in Chinese Universities, 2014, 30(4): 543-548.

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Ca-P Conversion Coating on AZ60 Magnesium Alloy for Biomedical Application

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