Erosion-corrosion is a dominant degradation in plant assets and influenced by various attributes of erodent such as velocity, corrosivity, shape, size, density, angle of attack and hardness, etc. Although Ni-P electroless coatings are famous for anti-corrosion and anti-wear properties; there is still room to improve these attributes that will pave its way towards various industrial applications. In this research work, various compositions of ternary Ni-P-graphene coatings were produced via the addition of different concentrations of graphene (30 mg/L, 60 mg/L, and 100 mg/L) into the electroless plating bath. Microstructural characterizations of coatings were conducted along with surface topography. Erosion-corrosion behaviors of the produced coatings were characterized using slurry pot erosion-corrosion testing employing AFS 50-70 Silica sand and 3.5 wt.% NaCl solution. The dominant wear mechanisms were identified using the SEM examination of surfaces after the erosion-corrosion test. High hardness, impermeability, and electrical properties of graphene concurrently improved the pure erosion, and erosion-corrosion attributes.

Subject
Nickel coatings, Steel surfaces, Coatings, Materials, Slurry, Plating, Corrosion rate, Mass loss, Roughness, Pure erosion, Erosion, Erosion corrosion, Hardness
Keywords:
Ni-P coatings, graphene, erosion-corrosion, synergistic effects
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2021
Association for Materials Protection and Performance (AMPP)
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