Abstract
In this paper, we are interested in the study of electrochemical, morphological and structural characteristics of the properties of the deposits of Zn-Ni-TiO2 obtained by electrodeposition on the mild steel substrate in a bath of sulfate. The principal aim is to improve the coatings with better properties, by incorporation of titanium oxide, which is a hard compound, chemically stable and irreducible. The characterization of the coatings was carried out by scanning electron microscopy (SEM) and by X-ray diffraction. The morphology of the film surface varies with the concentration of oxide titanium and it was found higher values of microhardness. Electrochemical characterization of the composites had been carried out through potentiodynamic polarization. The results showed that better corrosion resistance with the incorporation of oxide titanium.
Highlights
The materials, like humans, need to be well protected from external attack
Zn-Ni alloy is widely used for the corrosion protection of steel, especially in the automotive industry [4]
Vlasa et al [13] indicated that the porous nanocomposite coatings exhibit higher corrosion resistance when compared to pure Zn coatings and is strongly affected by the TiO2 structure and concentration
Summary
The materials, like humans, need to be well protected from external attack. The main aggressive agents are wear and corrosion. The use of zinc and zinc alloys to improve the corrosion resistance of coated steel sheets has been widely studied due to its importance in industrial contexts. TiO2 with a metallic coating significantly contributes to wear and corrosion resistance, better [8,9,10, 12]. Vlasa et al [13] indicated that the porous nanocomposite coatings exhibit higher corrosion resistance when compared to pure Zn coatings and is strongly affected by the TiO2 structure and concentration.
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