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Electroless nickel (EN) coatings have attract much attention due to their ability to provide a corrosion-resistant hard surface. However, the technological advancement demands the development of reinforced coatings with improved tribological performances. In this work, electroless nickel/black phosphorus nanosheets (EN-BP) coatings were prepared by an electroless plating method to provide friction-reducing and antiwear properties for a Q235 carbon steel. The influences of the concentration of black phosphorus and testing conditions on the tribological performances of the coatings were investigated. The results showed that the hardness of the EN-BP coating increased by 48.98% with the introduction of 0.01 g/L BP nanosheets in the plating solution, and the coefficient of friction reduced by 44.5% in pH 8 NaHCO 3  solution, respectively, compared with those in pure water. The friction reduction and antiwear mechanism was ascribed to the action roles of the interlayer shear of BP nanosheets and protective lubrication films composed of NiO, Ni(OH) 2 , SiO 2 , and P x O y  generated on the sliding coating surfaces. The excellent tribological properties of the EN-BP coatings show their promising application prospects in marine industry.

Tribological Behavior and Surface Analysis of Electroless Nickel Coatings Reinforced With Black Phosphorus Nanosheets