Etching Operation of NaCl Electrolytically Oxidized Water on the Surface of Pure Nickel Material

Abstract

This paper describes the influence of electrolytically oxidized water dilute NaCl on the surface of pure nickel. First, we clarified the etching characteristic of electrolytically-oxidized water of dilute NaCl against the surface of pure nickel using HCl solution for comparative immersion experiments. The results show electrolytically-oxidized water works well for the etching operation, and if the ORP/pH value of the electrolytically-oxidized water is high, the etching speed becomes correspondingly fast. The etching rate of electrolytically-oxidized water is high (about 3 times) compared with the HCl solution of the same pH value. Next, by the observation of the SEM image and surface roughness, the influence of electrolytically oxidized water on the shape of the pure nickel surface became clear. Lastly, auger analysis revealed that the natural-oxidation film of the pure nickel can be removed with electrolytically oxidized water. The study indicates that electrolytically oxidized water can be applied to the surface treatment and washing of pure nickel.