The effect of Al2O3 nanoparticles on tribological and corrosion behavior of electroless Ni-B-Al2O3 composite coating

In this study, the Ni-B-Al2O3 composite was successfully coated on the surface of Ck45 steel by elecroless method. X-Ray diffraction analysis (XRD) and scanning electron microscopy (SEM) were utilized in order to investigate and identify the coating properties. Wear behavior of the coating was studied by the pinon- disk test. Corrosion behavior of the Ni-B and Ni-B-Al2O3 coatings was investigated by using Tafel polarization diagrams in the 3.5% NaCl solution at room temperature. The obtained data demonstrate that the addition of Al2O3 nanoparticles to the coating has resulted in improving the tribological behavior of the coating due to the presence of the composite nanoparticles. Also, the results of electrochemical testing show that corrosion resistance of the electroless Ni-B coating with Al2O3 nanoparticles has dramatically increased.