High Corrosion Resistance Zinc-Nickel-SiO₂ Composite Plating with Excellent Hydrogen Embrittlement Properties

Abstract

The investigation of the film structure and hydrogen embrittlement resistance of Zn-Ni-SiO₂ composite plating film and Ti-Cd plating film with excellent hydrogen embrittlement resistance demonstrated that the Zn-Ni-SiO₂ composite plating film plated from acidic chloride bath had equal hydrogen permeability to that of the Ti-Cd plating film. Furthermore, cross-sectional observation revealed the structure of Zn-Ni-SiO₂ composite plating film. This crack structure presumably supports the high hydrogen permeability and the porous structure of Ti-Cd plating film.

These findings suggest that the Zn-Ni-SiO₂ composite plating film from an acid chloride bath has high functionality and effectiveness for application to high-strength components. This paper introduces the structure and hydrogen embrittlement resistance properties of this composite coating.