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Fractal, tribo-mechanical and corrosion characterization of hydrophobic and lead free electroless Ni-B mono and bi-layer coating developed using artificial intelligence

2025; IOP Publishing; Linguagem: Inglês

10.1088/2051-672x/adad8d

2051-672X

Asha Kumar, Tamonash Jana, Sushanta Ghuku, Arkadeb Mukhopadhyay,

Advanced Machining and Optimization Techniques

Abstract A quaternary, lead free electroless Ni-B-Cu-Sn coating was obtained using experimental design, artificial neural network and genetic algorithm based on higher hardness and deposition rate. A high predicted as-deposited hardness of 1138 HV 0.05 and deposition rate of 10 µm/hr was achieved. Coating surface had nodular, self-similar fractal nature with higher density for the bi-layered variant. The surface roughness and tribological behaviour was better for the single layered coating. Adoption of double layered coating only had a mild improvement in the corrosion resistance. The bi-layered coatings also exhibit hydrophobic nature with contact angle ~121-130°. The first critical load of failure of both the coatings were around 20 N which is nearly like lead stabilized electroless Ni-B coating. This new coating variant can possibly be a newer replacement to the conventional coatings.