An ideal bioresorbable foam for bone replacement should have porous structure similar to the architecture of natural bones, suitable mechanical properties, and disappear entirely after a proper healing time. In that way, magnesium is the element that combines the property of being both biocompatible and bioresorbable, while accelerates the bone regeneration [1]. Its natural degradation property can avoid the need for a second surgical procedure to remove the implant. However, since, magnesium degrades to fast it is crucial to retard the surface corrosion mostly in the early stage to avoid hydrogen release and enhance tissue integration [2]. In the present work, AZ31 foams with 65% porosity and 420 µm pore size, prepared by infiltration casting, were modified by Directed plasma nano synthesis (DPNS) at different low energy values. This surface modification varied the amount of Al content on the near surface and created dynamic interactions between the foam surface and the environment when exposed to simulated body fluid. Moreover, a specific combination of DPNS parameters, 400 eV ion energy and 1E18 fluence, led to the growth of a bioactive and corrosion protective hydroxyapatite interface.