The invention relates to an implant comprising a base from a biocorrodible magnesium alloy. Said magnesium alloy contains a plurality of randomly distributed particles of one or more of the elements Y, Zr, Mn, Sc, Fe, Ni, Co, W, Pt and rare earths of atomic numbers 57 to 71 or the particles consist of alloys or compounds that contain one or more of said elements. The average distance of the particles from each other is smaller than a hundred times the average particle diameter.