Corrosion Behavior of Incoloy-800H Alloy Surface Nickel Plating in Chloride Molten Salts

A pure nickel coating was prepared on the surface of Incoloy-800H alloy by electroplating technology, and its corrosion behavior in static high temperature chloride molten salt environment was studied. It was found that the pure nickel metal coating with good performance and strong adhesion could be obtained by electroplating in the nickel sulfamate plating solution. The nickel coating could protect element Cr from corrosion due to avoiding the direct contact between Cr and molten salt and effectively preventing the diffusion of element Cr, which effectively reduced the corrosion rate of the material. Applying Fick's second law, it was concluded that the diffusion coefficient of Cr in the nickel coating was about 9.18×10^-13 cm²/s in the chloride molten salt at 700 ℃.