This study uses nickel nanoparticles coated on the nickel–chromium
(Ni–Cr) alloy by the electrodeposition technique to protect
the alloy against corrosion. An open-circuit potential and potentiodynamic
and linear polarization resistance in a 1 M H
2
SO
4
solution saturated with carbon dioxide were used to study the anticorrosion
performance of nanoparticle coatings. When coated with nanomaterials,
the corrosion rate of Ni–Cr alloy was lower than when it was
bare, and the potential for corrosion increased from −0.433
V for uncoated Ni–Cr alloy to −0.103 V when the electrodes
were exposed to saturated calomel. Electrochemical experiments show
that nickel-coated Ni–Cr alloy corrosion in sulfuric acid media
has high protective characteristics, with an efficiency of 83.69%
at 0.165 mA/cm
2
current density when pH = 1 is used. As
demonstrated by the results of this research, the nickel–chromium
alloy can be protected from corrosion in acidic media by a low-acidity
bath coating layer. Surface morphologies have shown that coatings
at different acidic scales may be able to resist an acid attack because
of their excellent adherence to the nickel–chromium alloy surface.
Measures for determining and studying the composition of the alloy
surface’s protective covering were improved using X-ray diffraction
(XRD).
So the use of Fe3O4@SiO2–ZrCl2-MNPs leads to an improved protocol in terms of the compatibility with the environment, yields of the products, reaction times and the amount of the catalyst when compared with other catalysts.
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