Akademik Veri Yönetim Sistemi
Electrochimica Acta, cilt.557, 2026 (SCI-Expanded, Scopus)
Cr-Ni-Fe coatings were electrodeposited from an aqueous electrolyte consisting of chloride salts of each metal and boric acid. The boric acid effect was investigated. A binary potential loop of -0.7 V and -1.8 V was applied in sequence during the specified time interval and charge amount, respectively. Before electrodeposition, the solutions were optically and electrochemically analyzed by ultraviolet-visible spectroscopy and cyclic voltammetry (CV). The complexes of [Cr(H2O)6]3+, [Cr(H2O)5Cl]2+ and [Cr(H2O)4Cl2]+ formed natively in solution. Also, the crystal field, Racah and ligand field parameters were calculated for the solutions without and with boric acid. The boric acid makes the bonds less covalent in character. According to the CV curves, the current becomes smooth with the boric acid content due to the buffering effect. X-ray diffraction patterns showed that the coatings were crystallized in cubic δ-phase as a result of the dominance of Cr content. The reason for the cracks on the surface was studied by the Fourier-transformed infrared spectroscopy, optical profilometry, scanning electron microscopy and energy dispersive X-ray (EDX) spectroscopy. The magnetic properties were searched by vibrating sample magnetometry, which proved the magnetic content (Ni and Fe) of the coating, consistent with the EDX results. The corrosion behavior was studied by electrochemical impedance spectroscopy and Tafel plots. The highest corrosion resistance was found for the coatings deposited from a solution having 0.12 M boric acid.