Magnesium and its alloys are considered promising materials for temporary bio-implants because of their mechanical properties, which closely resemble those of natural bone. Higher rates of corrosion and degradation in the physiological environment always limit its practical application as an implant. Extensive research is being conducted to reduce the effect of corrosion on implants. This study dwells on the experimentation of the application of zein-hydroxyapatite-based composite coating on the magnesium AZ31B alloy and the dip coating technique to achieve the coating. The experimental results provide insights into the dip coating technique and also provide the effect of corrosion after the coating. Additionally, the composite coating’s structural and compositional characteristics are analyzed to assess its suitability for biomedical applications. The research concludes by discussing the effects, merits, and demerits of the coating technique and how the zein-hydroxyapatite coating affected the corrosion properties of the alloy.