Controlling initial biodegradation of magnesium by a biocompatible strontium phosphate conversion coating.
XB Chen, DR Nisbet, RW Li, PN Smith, TB Abbott, MA Easton, D-H Zhang, N Birbilis
Acta Biomater | Published : 2014
A simple strontium phosphate (SrP) conversion coating process was developed to protect magnesium (Mg) from the initial degradation post-implantation. The coating morphology, deposition rate and resultant phases are all dependent on the processing temperature, which determines the protective ability for Mg in minimum essential medium (MEM). Coatings produced at 80 °C are primarily made up of strontium apatite (SrAp) with a granular surface, a high degree of crystallinity and the highest protective ability, which arises from retarding anodic dissolution of Mg in MEM. Following 14 days' immersion in MEM, the SrAp coating maintained its integrity with only a small fraction of the surface corrode..View full abstract