Luca Bertolini is Full Professor in the field of materials science and technology at the Polytechnic University of Milan, Italy, where he teaches Construction Materials and Durability of Materials to students of Civil Engineering and Building Engineering Faculties. The scientific activity of Luca Bertolini is focused on the durability of building materials, especially reinforced concrete. Bernhard Elsener is Professor for materials science at the Faculty of Engineering at the University of Cagliari, Italy, and a lecturer at ETH Zurich, Switzerland. He is an internationally well-known expert on the durability of reinforced and prestressed concrete structures. His extensive research work and numerous publications focus on non-destructive methods to detect and quantify corrosion, the use of new electrically isolated post-tensioning tendons and electrochemical restoration techniques. Pietro Pedeferri (1938-2008), a graduate in chemical engineering and former Professor of Electrochemistry at the University of Bari, has been Professor of Corrosion and Protection of Materials at the Technical University of Milan since 1983. His work has been mainly concerned with the corrosion of steel in concrete, and he has published more than 300 papers and a dozen books in the field of corrosion and materials technology. Elena Redaelli is Assistant Professor in the field of materials science and technology at the Polytechnic University of Milan where she teaches Construction Materials to Building Engineering students. Her main scientific interests are connected with the corrosion of steel in concrete, its characterization and methods to prevent and control it. In particular, her research activity has focused on electrochemical techniques in concrete and methods for durability design of concrete structures. Rob B. Polder is a senior materials scientist at the Netherlands Organization for Applied Scientific Research, and a full professor of materials and durability at Delft University of Technology in the Faculty of Civil Engineering and Geosciences. The main focus of his work is on corrosion of steel in concrete, from modeling and prediction to prevention and remediation, including electrochemical methods.