Abstract
Electrodeposition and characterization of novel ceria-doped Zn-Co composite coatings was the main goal of this research. Electrodeposited composite coatings were compared to pure Zn-Co coatings obtained under the same conditions. The effect of two ceria sources, powder and home-made sol, on the morphology and corrosion resistance of the composite coatings was determined. During the electrodeposition process the plating solution was successfully agitated in an ultrasound bath. The source of the particles was found to influence the stability and dispersity of plating solutions. The application of ceria sol resulted in an increase of the ceria content in the resulting coating and favored the refinement from cauliflower-like morphology (Zn-Co) to uniform and compact coral-like structure (Zn-Co-CeO2 sol). The corrosion resistance of the composite coatings was enhanced compared to bare Zn-Co as evidenced by electrochemical impedance spectroscopy and scanning Kelvin probe results. Zn-Co doped with ceria particles originating from ceria sol exhibited superior corrosion resistance compared to Zn-Co-CeO2 (powder) coatings. The self-healing rate of artificial defect was calculated based on measured Volta potential difference for which Zn-Co-CeO2 (sol) coatings exhibited a self-healing rate of 73.28% in a chloride-rich environment.
Highlights
Zinc-based protective coatings are widely applied in different fields of industries for steel protection
The stability of aqueous ceria sol and ceriapowder powder particlesdispersed dispersed inwater water was studied in terms of zeta potential (ξ) and particle size distribution (PSD)
Since it is imstudied in terms of zeta potential (ξ) and particle size distribution (PSD)
Summary
Zinc-based protective coatings are widely applied in different fields of industries for steel protection. Co-deposition of TiO2 [8], YSZ (yttria-stabilized zirconia) [9], Al2 O3 [10], SiO2 [11], SiC [12] particles into zinc matrixes has enhanced a wide range of coatings properties, like hardness, corrosion resistance, wear properties, etc. Due to their superior characteristics (exceptional corrosion resistance, low thermal conductivity, high ionic conductivity, antioxidant property, high oxygen storage capacity, etc.), rare-earthbased materials, especially ceria (CeO2 ) particles, have found application in different fields, such as material science, catalysis (very effective photocatalyst), fuel cells, biomaterials, ceramics, cosmetics and medicine [13]. The synergistic effect of the ceria presence and ultrasound applied during electrodeposition on the morphology and corrosion resistance of the Zn-Co coatings is studied
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
