INVESTIGATION OF THE CORROSION RESISTANCE PROPERTIES OF LASER-FORMED COATINGS BASED ON Nİ-BASED POWDERS

This study investigates the corrosion resistance properties of coatings formed by laser cladding using Ni-based powders. Laser cladding technology is widely applied to improve the surface performance of engineering components operating under aggressive environments. In this process, Ni-based powders are deposited onto the substrate surface, forming a dense and metallurgically bonded coating layer with enhanced protective properties. The research focuses on the influence of Ni-based powder compositions on the microstructure and corrosion resistance of the laser-formed coatings. Due to rapid heating and cooling during the laser cladding process, a refined and homogeneous microstructure is formed, which contributes to improved mechanical and chemical stability. The presence of nickel and alloying elements such as chromium and boron promotes the formation of stable passive films on the coating surface, significantly increasing resistance to corrosion. The results demonstrate that laser-formed Ni-based coatings exhibit higher corrosion resistance compared to the untreated base material. The improved performance is attributed to the dense structure of the coating, reduced porosity, and strong metallurgical bonding between the coating and the substrate. These characteristics make Ni-based laser coatings promising for applications in oil and gas equipment, mechanical engineering, and other industries where components operate in corrosive and wear-prone environments. The findings of this study confirm that laser cladding with Ni-based powders is an effective method for enhancing the corrosion resistance and service life of metallic components. Keywords: Ni-based powders, laser cladding, corrosion resistance, surface engineering, microstructure, laser technology.