Microstructure and corrosion behavior of coated AZ91 alloy by microarc oxidation for biomedical application

Corrosion resistance and surface biocompatibility of a microarc oxidation coating on a Mg–Ca alloy

“…Moreover, the MAO technique is very effective in the preparation of coatings for other biomedical magnesium alloys, e.g. AZ91 [33] and AZ91D [14,15], exhibiting a 2-3 order reduction in current density. …”

Corrosion behavior of a self-sealing pore micro-arc oxidation film on AM60 magnesium alloy

“…Without additional sealing-pore post treatments, the pores in the MAO film are self-sealed during the film growth. Meanwhile, the novel MAO film also contain more chemically stable titanium oxides besides magnesium oxides [12,13]. As a result, the corrosion resistance of the self-sealing pore film is enhanced 3-5 times over that obtained with traditional electrolyte systems [3,14].…”

The n-MAO/EPD bio-ceramic composite coating fabricated on ZK60 magnesium alloy using combined micro-arc oxidation with electrophoretic deposition

“…MAO is a novel and unique surface treatment technique based on anodic oxidation, by introducing the work zone into the high voltage discharge zone, in situ grown ceramic coating is directly formed on the surface of magnesium-based materials in a suitable electrolyte [6,7]. Some researchers have proven that the MAO coating can improve corrosion resistance of Mg and its alloys substrate in the SBF [7][8][9][10][11]. However, it is undeniable that the MAO coating still have some defects, such as micro-pores, micro-cracks, lack of biological activity, etc.…”