Effect of NiO–NiCr2O4 nano-oxides on the microstructural, mechanical and corrosion properties of Ni-coated carbon steel

Mechanical, morphological, and corrosion features of Ni–Cr oxide nanocomposite coating deposited on SS304 by EPD

“…However, a higher coating thickness led to defects, cracks, and pores (Figures 3–5). The extended penetration paths in the thicker coatings lead to greater distance and complicated paths for the transfer of material and charge, which can hinder the corrosion rate 2 . Figure 16B shows the Bode plots of the 60–40 coating applied in 3 min, which shows a significant improvement in corrosion resistance.…”

“…The extended penetration paths in the thicker coatings lead to greater distance and complicated paths for the transfer of material and charge, which can hinder the corrosion rate. 2 Figure 16B shows the Bode plots of the 60-40 coating applied in 3 min, which shows a significant improvement in corrosion resistance. The equivalent circuit fitted to the EIS data also shows that the number of sample-electrolyte interfaces (the number of capacitive semicircles) has decreased, confirming the Nyquist plot.…”

“…Due to their small size, nanomaterials have a high surfaceto-volume ratio, which causes considerable changes in material properties, such as decreasing the thermal conductivity coefficient, improving the ability of the material to store energy and the malleability of brittle materials. [1][2][3] Regarding the mechanical properties of materials, it is reported that the hardness has increased up to seven times in the nanoscale. 3 In addition, composite materials can be employed to improve the material properties and achieve the required characteristics.…”

“…[7][8][9][10][11] Moreover, the chemical stability of NiO particles has caused it to be a suitable inhibitor to prevent the substrate reaction with the surrounding environment in coating applications. 2,12,13 Green particles of Cr 2 O 3 with antibacterial features, chemical stability, thermal stability, and high hardness are used in medical fields, improving the corrosion properties of metals at high temperatures and forming wear-resistant coatings in dry and wet environments. [13][14][15][16][17] Moreover, due to its low-friction coefficient, Cr oxide is used in the formation of self-lubricating coatings in order to reduce the wear rate.…”

“…NiO nanoparticles with favorable magnetic, optical, photochemical, photocatalytic, and dielectric properties have various applications, such as making gas sensors, supercapacitors, solar cells, and drug delivery materials 7–11 . Moreover, the chemical stability of NiO particles has caused it to be a suitable inhibitor to prevent the substrate reaction with the surrounding environment in coating applications 2,12,13 . Green particles of Cr 2 O 3 with antibacterial features, chemical stability, thermal stability, and high hardness are used in medical fields, improving the corrosion properties of metals at high temperatures and forming wear‐resistant coatings in dry and wet environments 13–17 .…”