Tribocorrosion Analysis of Cobalt–nickel–molybdenum–graphene (Co–ni–mo–g) Nanocomposite Coatings

To protect steel surfaces in industrial applications and enhance their wear and corrosion resistance, researchers are focusing on graphene-based nanocomposite coatings. This study depicts the wear and corrosion properties of coatings made from cobalt–nickel–molybdenum (Co–Ni–Mo), Co–Ni–Mo withFormula: see text0.15 weight percent graphene (Co–Ni–Mo-G 0.15Formula: see textwt.%), and Co–Ni–Mo with 0.45Formula: see textweight percent graphene (Co–Ni–Mo-G 0.45Formula: see textwt.%) applied to mild steel substrates using the pulsed electrodeposition technique. The results revealed that the addition of graphene, particularly at 0.45Formula: see textwt.%, to the Co–Ni–Mo coating significantly improved its ductile load-bearing capacity and wear resistance. This enhancement is attributed to graphene’s ability to strengthen the matrix, refine grain structure, and enable efficient grain size control. Additionally, the Co–Ni–Mo-G 0.45Formula: see textwt.% coating demonstrated superior corrosion resistance compared to the plain Co–Ni–Mo coating. The presence of graphene in the nanocomposite composition resulted in better grain strength and enhanced surface properties, making it a promising material for industrial applications requiring robust steel surface protection.