Abstract
Dicalcium phosphate dihydrate (DCPD) brushite coating with flake like crystal structure for the protection of AZX310 and AM50 magnesium (Mg) alloys was prepared through chemical deposition treatment. Chemical deposition treatment was employed using Ca(NO3)2·4H2O and KH2PO4 along with subsequent heat treatment. The morphological results revealed that the brushite coating with dense and uniform structures was successfully deposited on the surface of AZX310 and AM50 alloys. The X-ray diffraction (XRD) patterns and Attenuated total reflectance infrared (ATR-IR) spectrum also revealed the confirmation of DCPD layer formation. Hydrophilic nature of the DCPD coatings was confirmed by Contact angle (CA) measurements. Moreover, electrochemical immersion and in vitro studies were evaluated to measure the corrosion performance and biocompatibility performance. The deposition of DCPD coating for HTI AM50 enables a tenfold increase in the corrosion resistance compared with AZX310. Hence the ability to offer such significant improvement in corrosion resistance for HTI AM50 was coupled with more bioactive nature of the DCPD coating is a viable approach for the development of Mg-based degradable implant materials.
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Acknowledgements
The authors acknowledged for the financial supports received from the funding agencies of Brazil government such as CAPES (BEX 5383/15-3), (PNPD-PhD scholarships) CNPq (304051/2014-4) and FAPERJ (E-26/110.087/2014, 13.577/2015 and /216.730/2015).
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Sasikumar, Y., Kumar, A.M., Babu, R.S. et al. Biocompatible hydrophilic brushite coatings on AZX310 and AM50 alloys for orthopaedic implants. J Mater Sci: Mater Med 29, 123 (2018). https://doi.org/10.1007/s10856-018-6131-8
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DOI: https://doi.org/10.1007/s10856-018-6131-8