The advantage of ultrasound during electrodeposition on morphology and corrosion stability of Zn-Co alloy coatings

Riđošić, Marija; García-Lecina, Eva; Salicio-Paz, Asier; Bajat, Jelena B.

doi:10.1080/00202967.2020.1748390

Cited by 26 publications

(9 citation statements)

References 30 publications

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“…The activity at the metal substrate could be presented by values of charge-transfer resistance, R ct , derived from fitting of the EIS data by commonly used equivalent electrical circuits for coatings comprising one or two time constants [6,14]. The small initial decrease of R ct for all coatings (Figure 15) was related to contact of the electrolyte with the metal substrate.…”

Section: Polarization Tests and Electrochemical Impedance Spectroscopymentioning

confidence: 99%

“…Zinc-based protective coatings are widely applied in different fields of industries for steel protection. In order to achieve prolonged service life, zinc coating is usually alloyed with Ni [1,2], Fe [3,4] or Co [5][6][7]. The constant demands imposed by industry for thinner, more efficient and long-term steel protection have led to more intensive research on different composite coatings.…”

Section: Introductionmentioning

confidence: 99%

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Zn-Co-CeO2 vs. Zn-Co Coatings: Effect of CeO2 Sol in the Enhancement of the Corrosion Performance of Electrodeposited Composite Coatings

Riđošić

Nikolić

Salicio-Paz

et al. 2021

Metals

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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.

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Section: Polarization Tests and Electrochemical Impedance Spectroscopymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Zn-Co-CeO2 vs. Zn-Co Coatings: Effect of CeO2 Sol in the Enhancement of the Corrosion Performance of Electrodeposited Composite Coatings

Riđošić

Nikolić

Salicio-Paz

et al. 2021

Metals

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“…A positive effect of ultrasonic agitation on surface roughness reduction was also observed by Sheng et al for electrodeposited Ni-Co coatings [ 37 ]. The presence of ultrasound during electrodeposition enhances mass transfer, influencing the kinetics of the electrode reactions, reducing grain size and the influencing processes of the desorption of gas bubbles from the electrode surface [ 38 , 39 ]. This, in turn, resulted in the reduction of the number of pores and the longitudinal traces resulting from the displacement of hydrogen bubbles, as indicated by the presented results.…”

Section: Resultsmentioning

confidence: 99%

Ultrasound Supported Galvanostatic Deposition of Zn Coatings Reinforced with Nano-, Submicro-, and Micro-SiC Particles—Weak Acidic Chloride Baths

2021

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In this paper, we present results concerning the electrochemical deposition of Zn-SiC composite coatings reinforced with nano-, submicro-, and microparticles. The influence of current density, particle size, and ultrasound on functional parameters which are especially important from a practical point of view (i.e., concentration of particles in coatings, current efficiency, morphology, reflectivity, roughness, hardness, and corrosion resistance) are investigated and discussed. Coatings were deposited from commercial, chloride-based electrolytes dedicated for the deposition of Zn coatings in a weakly acidic environment. Electrodeposited composites contained up to 1.58, 4.08, and 1.15 wt. % of SiC for coatings reinforced with nano, submicro, and micrometric particles, respectively. The process proceeded with relatively high efficiency, exceeding 80% in almost all cases. The results indicate that ultrasounds strongly increase Faradaic efficiency and affect the kinetics of electrode processes and the properties of synthesized coatings. Moreover, the obtained results show that it is possible to synthesize composite coatings with slightly higher mechanical properties while retaining corrosion resistance compared to metallic Zn coatings.

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“…Ultrasonic-assisted electrodeposition facilitates the uniform distribution of particles in solution and metallic matrix composites [25] . Besides, ultrasound can promote mass transport, reduce the diffuse layer thickness [26] , [27] and increase the growth rate of the Ni/diamond composite coatings.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic-assisted electrodeposition of Ni/diamond composite coatings and its structure and electrochemical properties

Mei

Chu

et al. 2021

Ultrasonics Sonochemistry

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Highlights Ni/diamond composite coating have been synthesized by ultrasonic-assisted electrodeposition. Influences of current density and agitation modes on structural and properties were evaluated. The consistency of the grain orientation can be optimized under ultrasonic assistance. Grain refinement and corrosion resistance were improved with ultrasonic assistance. Ultrasonic agitation and 4 A dm −2 is helpful to the enhancement of anti-corrosion capability.

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The advantage of ultrasound during electrodeposition on morphology and corrosion stability of Zn-Co alloy coatings

Cited by 26 publications

References 30 publications

Zn-Co-CeO2 vs. Zn-Co Coatings: Effect of CeO2 Sol in the Enhancement of the Corrosion Performance of Electrodeposited Composite Coatings

Zn-Co-CeO2 vs. Zn-Co Coatings: Effect of CeO2 Sol in the Enhancement of the Corrosion Performance of Electrodeposited Composite Coatings

Ultrasound Supported Galvanostatic Deposition of Zn Coatings Reinforced with Nano-, Submicro-, and Micro-SiC Particles—Weak Acidic Chloride Baths

Ultrasonic-assisted electrodeposition of Ni/diamond composite coatings and its structure and electrochemical properties

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