Abstract: A corrosion protection structure for protecting an outer covering on a porous metal body from corrosive undermining. The corrosion protection structure includes an inner protective material within the pores of a metal body having an outer surface, pores communicating with the outer surface, and a covering of solid outer protective material that is bonded to the outer surface and bridges over the pores. The inner protective material is a liquid medium, preferably oil, which is substantially impervious to atmospheric corrosive agents, having therein a suspension of finely divided particulate material, preferably paint pigment.