Cover Picture: Materials and Corrosion. 3/2016

Cover: Upper Left : SEM micrograph of magnetite disc (doughnut‐like) formed at the mild steel/rust interface when steel is exposed to a chloride‐very rich atmosphere. Upper Right : Secondary electron image of the same magnetite disc conducted at 2 keV, showing with higher resolution the microstructure inside the doughnut which is composed of numerous lamellas. Lower Left : Later stage when the magnetite disc is invaded by akaganeite crystals. Lower Right : SEM micrograph corresponding to aggregates of akaganeite nanocrystals. More detailed information can be found in: D. de la Fuente, I. Díaz, J. Alcántara, B. Chico, J. Simancas, I. Llorente, A. García‐Delgado, J. A. Jiménez, P. Adeva and M. Morcillo , Corrosion mechanisms of mild steel in chloriderich atmospheres, Materials and Corrosion 2016 , 67, page 227.