K. Wykpis, M. Popczyk
Zn–Ni coatings were deposited under galvanostatic conditions at varying current densities of 20–60 mA ⋅ cm–2 to investigate their properties. The objective was to analyze the influence of current density on surface morphology, chemical and phase compositions, and corrosion resistance of the coatings. Methodology included structural investigations using X-ray diffraction (XRD), surface morphology assessments with a JEOL JSM-6480 scanning electron microscope, and electrochemical tests in a 5% NaCl solution through potentiodynamic and electrochemical impedance spectroscopy (EIS) methods. Additionally, the local corrosion resistance was determined via the Scanning Kelvin Probe (SKP) method. Results indicated that while the chemical and phase compositions of the Zn–Ni coatings depend minimally on current density, this parameter significantly affects the quantity of zinc co-deposited with nickel, influencing the formation of intermetallic compounds or solid solutions. Variations in the local Kelvin potential were observed due to small differences in chemical composition and uneven distribution of Zn(Ni) and Ni2Zn11 phases on coating surfaces. Ultimately, optimal current density values for enhanced corrosion resistance were determined to be between 30 and 40 mA ⋅ cm–2.
@article{8448378f-c801-454b-a8da-00325c9a460c,
title={INFLUENCE OF THE CURRENT DENSITY OF DEPOSITION ON THE PROPERTIES OF Zn–Ni COATINGS},
author={K. Wykpis and M. Popczyk},
year={2012},
language={en}
}TY - JOUR TI - INFLUENCE OF THE CURRENT DENSITY OF DEPOSITION ON THE PROPERTIES OF Zn–Ni COATINGS AU - K. Wykpis AU - M. Popczyk PY - 2012 LA - en ER -
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