This volume in the European Federation of Corrosion series brings together the full papers presented in the successful session "Corrosion of Steel in Concrete" at EUROCORR '99 held in Aachen, Germany. The papers, grouped under the two headings "Corrosion Mechanisms and Corrosion Measurements" and "Corrosion Protection of Reinforced Concrete Structures" provide a bridge between theory and practice and will be of value to both scientists and engineers.