Electrodeposition of Homogeneous and Functionally Graded Ni-Co/SiC Nanostructured Coatings: Erosion, Wear, and Corrosion Behavior

Saadatbakhsh, Meisam; Lari Baghal, Seyed Mohamad; Gheisari, Khalilollah

doi:10.22050/ijogst.2025.532097.1745

Electrodeposition of Homogeneous and Functionally Graded Ni-Co/SiC Nanostructured Coatings: Erosion, Wear, and Corrosion Behavior

Document Type : Research Paper

Authors

Meisam Saadatbakhsh ¹ ^¶

seyed mohamad Lari Baghal ²

Khalilollah Gheisari ³

¹ PHD Student,Department of Materials Science and Engineering, Faculty of Engineering, Shahid Chamran University of Ahvaz, Iran

² Associate Professor, Department of Materials Science and Engineering, Faculty of Engineering, Shahid Chamran University of Ahvaz, , Iran

³ Associate Professor, Department of Materials Science and Engineering, Faculty of Engineering, Shahid Chamran University of Ahvaz, Iran

10.22050/ijogst.2025.532097.1745

Abstract

In this study, nanostructured homogeneous and functionally graded (FG) Ni-Co/SiC coatings were fabricated on aluminum substrates via electrodeposition using a square pulse current. The FG coating was produced by continuously varying the concentration of SiC particles (0–40 g/L) in the electrolyte, resulting in a graded particle distribution across the coating thickness. The microstructure and morphology of the coatings were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). Mechanical and electrochemical properties were evaluated through microhardness testing, T-peel adhesion testing, pin-on-disk wear testing, erosion testing, and potentiodynamic polarization and impedance spectroscopy. The results revealed that the SiC content in the FG coating gradually increased from 0 wt.% at the substrate interface to 6 wt.% at the surface. Compared to the homogeneous Ni-Co/SiC coatings, the FG coating demonstrated 40% higher adhesion strength and twice the wear resistance. Additionally, the FG coating exhibited improved corrosion resistance and overall mechanical performance, highlighting its potential for demanding industrial applications.

Keywords

Functionally graded coatings

Ni-Co/SiC

Nanostructure

Corrosion

Wear

Subjects