Fig. 1: Schematic diagram of experimental design and specimen installation.
From: Mechanisms and kinetic model for steel corrosion in unsaturated cementitious materials

The specimens are exposed to three typical corrosion conditions a corrosion behaviors in simulated pore solution, b corrosion behaviors in saturated mortar at RH 97%, and c corrosion behaviors in partially saturated mortar at RH 84%, 69%, and 43%.