Effect of nano silver reinforced of bio-composite coatings on metal substrate

¹ Materials Engineering Department, University of Technology- Iraq, Baghdad 10066, Iraq
² Production Engineering & Metallurgy College, University of Technology-Iraq, Baghdad 10066, Iraq

Published online: 24 June 2026

Abstract

Stainless steel 316L is one of the metal biomaterials used in implant applications due it it's so strong. For improved biocompatibility and mental activity, metal surfaces must be coated. Consequently, this study tries to increase the osseointegration of the alloy while retaining its good mechanical characteristics. Firstly, by dipping the substrate material, stainless steel 316L, into the acidic electroless bath solution, silver nanopowder coating is produced. The stainless-steel sample was prepared with a catalyst solution. Then deposit the composite layer by the EDS method. X-ray diffraction was used to characterize the crystallinity and crystal structures of the coating layers. The scanning electron microscopy (FESEM) and energy dispersive spectroscopy (EDS) results demonstrated that the composite coating, which is thick with homogeneous absorbents and continuous with a very homogeneous mixture inside the coating, had a significantly enhanced microhardness and adhesion strength. Furthermore, the biological behavior of materials was investigated by examining the roughness and wetting characteristics of the coated samples. The results showed that the average coating thickness for the nanocoated silver sample is 59.1 um, and the average composite thickness of the multilayer coating is 86.6 um for 4% NiO, 88.5 um for 8% NiO, and 89.6 for 8% NiO. Moreover, those layers were created to be consistent, homogenous, and crack-free, and the surface was extremely wettable.