Wetting significantly influences corrosion and related processes. Wetting of a metal surface refers to the ability of a liquid to maintain contact with the surface of a solid metal. This interaction is governed by the balance of intermolecular forces between the liquid and the metal. Dwyer et al. investigated water dissociation on clean and oxidized Fe(110) surfaces at different temperatures (160, 225, 315, and 460 K) using ultraviolet photoemission spectroscopy (UPS). It was observed that spontaneous water dissociation at 215 K formed a mixed adlayer of hydrogen (-H) and hydroxyl (-OH) groups on clean Fe(110) surfcae. Further heat of this surface resulted in the decomposition of hydroxyl groups to produce molecular hydrogen and oxygen adlayer. The maximum oxygen coverage was found to be 0.4 ML, even with additional water exposure. When the pre-oxidized surface (0.4 ML) was exposed to water at 225 K, on the other hand, surface hydroxyl groups were doubled compared to the clean surface, indicating further oxidation of water. This increment in hydroxyl groups compared to the clean surface may be due to the absence of hydrogen atoms on the surface. Upon increasing the temperature to 315 K, molecular hydrogen and water began to evolve, leaving the oxygen atoms on the surface through the decomposition of surface hydroxyl groups, thereby regenerating the 0.4 ML oxygen adlayer. However, the oxidation of bulk iron was not observed in the conditions employed in an earlier study, which suggested that a critical amount of chemisorbed oxygen is required to initiate the bulk oxidation process. Such the critical chemisorbed oxygen was not achieved until 360 K for the Fe(110) and water system. Similar observations for the Fe(100) surface were obtained using LEED and EELS techniques by Hung et al. The complex system was studied using DFT calculations. Eder et al. examined the initial stage of iron oxidation by monitoring the interaction between Fe(100) and Fe(110) surfaces, respectively, with water using spin-polarized DFT calculations with ultrasoft pseudopotentials. The energy analysis demonstrated that the water molecules tend to spontaneously dissociate into hydroxyl and hydrogen (H2O* → *OH + *H) on the surfaces at low water coverages. Once the iron surfaces are covered with H or OH, however, the water molecules dissociate in a non-spontaneous manner. Compared to the Fe(110) surface, the Fe(100) surface exhibited a lower energy barrier of +0.08 eV for water dissociation, calculated using the nude elastic band (NEB) transition state finding method. On the other hand, the Fe(100) surface was found to be chemically more reactive than Fe(110), due to the low dense packing of the Fe(100) surface compared to the Fe(110) surface. Other DFT calculations employed to examine the interaction of water with the Fe(100)