Recent Progress in the Application of Nickel/Nickel Oxide Nanoparticles/Nanocomposites as Corrosion Inhibitors

This review paper examines the potential of using NPNi/NPNiO and NC as CI for MS and other ferrous alloys in a variety of aggressive corrosive media.A survey of previous literature revealed that higher Ct of NPNi has significantly reduced CR and has increased corrosion IE(%) for different ferrous alloys in various corrosive media.These CI effectively protect the substrate, even at low Ct, by forming a dense passive film which adheres to the metal surface and inhibits anodic or cathodic reactions that cause metal corrosion.Their enhanced corrosion protection ability is due to the presence of more available active sites for adsorption of destructive ions, caused by their high surface area to volume ratio.NPNi are very stable, even at higher T and in aggressive salt environments, due to their large surface area, high hardness and excellent thermal stability.These CI have a unique advantage over other traditional organic and green inhibitors, because they are not easily washed away by corrosive fluids during industrial operations, and are chemically stable under harsh conditions and elevated T. Different methods for synthesis and characterization of NPNi, as well as environmental and safety considerations associated with the use of these CI, are also herein discussed.