Surface Modification with Phosphate and Hydroxyapatite of Porous Magnesium Scaffolds Fabricated by Binder Jet Additive Manufacturing

The presence of porosity within magnesium-based orthopaedic implants is known to be beneficial, promoting cell proliferation and vascularisation. However, the increases surface area available for corrosion, compounding issue high corrosion rates which has long been plaguing materials. This work looks at influence hydroxyapatite phosphate conversion coatings on performance conventionally cast, dense Mg-Zn-Zr alloys binder jet additive manufactured porous scaffolds. coating was found more effective than scaffold, with discrepancies attributed both microstructure geometric manufactured, not only rate hydrogen evolution but also reduces ability gas generated pore channels escape sample’s surface. restricts effectiveness application Mg scaffold. Furthermore, limited diffusion can result in differing localized environments, causing between localised environment that bulk electrolyte.