Self-healing effect of ceria electrodeposited thin films on stainless steel in aggressive 0.5 mol/L NaCl aqueous solution

Guergova, Desislava; Stoyanova, E.; Stoychev, D.; Avramova, I.; Stefanov, P.

doi:10.1016/s1002-0721(14)60548-2

Cited by 31 publications

(16 citation statements)

References 56 publications

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“…Then, the Eocp moved to anodic direction reaching the steel substrate potential (−0.492 mV/SCE). The fluctuation of Eocp between 50 and 350 h close to the potential of steel can be related to a transient stage in which the establishment and dissolution of corrosion film on the substrate surface are concomitant . Between 350 and 500 h, the Eocp evolved toward the substrate potential.…”

Section: Resultsmentioning

confidence: 99%

“…The fluctuation of Eocp between 50 and 350 h close to the potential of steel can be related to a transient stage in which the establishment and dissolution of corrosion film on the substrate surface are concomitant. [47] Between 350 and 500 h, the Eocp evolved toward the substrate potential. These results indicate that the sample is still under active corrosion process where the coating is unable to provide protection.…”

Section: Protection Afforded By the Depositsmentioning

confidence: 99%

“…Most of such iron‐based corrosion products are known to be not protective due to their porosity and low adhesion to the steel substrate . Yet, cerium oxides films have been reported to act as effective cathodic coating and to restore the passive state of steel after being disturbed in NaCl 3.5% solution “self‐healing mechanism” through the formation of secondary layer of Ce(OH) 4 , CeO 2 , Fe(OH) 2 , and Fe 2 O 3 in scratched area …”

Section: Introductionmentioning

confidence: 99%

“…[19] Yet, cerium oxides films have been reported to act as effective cathodic coating and to restore the passive state of steel after being disturbed in NaCl 3.5% solution "self-healing mechanism" through the formation of secondary layer of Ce(OH) 4 , CeO 2 , Fe(OH) 2 , and Fe 2 O 3 in scratched area. [20] Therefore, the use of additives in the electrodeposition bath is often recommended. Generally, small amounts of additives affect mainly the electrodeposition reaction kinetics either by adsorption or complexation.…”

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confidence: 99%

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Effect of the pH of the electrolyte on the formation and on the corrosion properties of ceria based coating on carbon steel

Bourenane

Hamlaoui

Rémazeilles

et al. 2018

Materials & Corrosion

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The effects of the modification of the pH in 0.1 M cerium nitrate solutions in the elaboration and corrosion resistance of ceria based coatings on carbon steel are investigated. Increasing the concentration of acetic acid impedes an efficient electrodeposition. At low concentrations, acetic acid seems to prevent the precipitation of Ce(OH)3 and the formation of even films of cerium oxides is favored. The increase of pH through the addition of NaOH to the cerium nitrate solutions with 0.008 M of acetic acid is shown to provide superior corrosion resistance for exposures in air and immersed in 0.5 M NaCl for 30 days.

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Section: Resultsmentioning

confidence: 99%

Section: Protection Afforded By the Depositsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Effect of the pH of the electrolyte on the formation and on the corrosion properties of ceria based coating on carbon steel

Bourenane

Hamlaoui

Rémazeilles

et al. 2018

Materials & Corrosion

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“…Cerium oxide can be electrodeposited, both anodic and cathodically. Anodically, the electrodeposited oxide shows as stoichiometry closer to cerium oxide (IV) [ 23 , 24 ], while cathodic electrodeposition produces a mixture Ce (III)/Ce (IV) oxides [ 25 , 26 , 27 ]. The electrodeposition of cerium, like any other element, can be carried out from different electrolytes such as molten salts, organic or aqueous solutions [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

Deposition of Zinc–Cerium Coatings from Deep Eutectic Ionic Liquids

Marín-Sánchez¹,

Gracia-Escosa²,

Conde³

et al. 2018

Materials

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This work studies the electrodeposition of zinc and cerium species on carbon steel substrates from choline chloride-based ionic liquid bath in order to develop a protective coating with anti-corrosion, sacrificial, and self-repairing properties. Hull cell tests were used to study the influence of the current density on composition of the coatings and their morphology. Surface morphology, chemical composition and oxidation state of the obtained coatings were examined by scanning electron microscopy (SEM), Energy Dispersive X-ray spectroscopy (EDX), and X-ray photoelectron spectroscopy (XPS), respectively. Furthermore, electrochemical characterization and corrosion tests were performed in order to evaluate the corrosion properties of the electrodeposited Zn–Ce coatings. The cathodic deposition of Zn–Ce was achieved for the first time using the deep eutectic solvent choline chloride-urea as an electrolyte. Cerium was incorporated in the coating as oxide or mixed oxide within the Zn metal matrix. The composition and morphology of the electrodeposited coating were dependent on the applied current density. Electrochemical corrosion tests showed similar corrosion rates for all the coatings. Nevertheless on scratched tests with a ratio area of 15:1, for Zn–Ce coatings cerium oxide somehow migrates from the coating to the high pH cathodic areas developed on the surface of the bare steel substrate. Further study is still necessary to improve the corrosion protection of the Zn–Ce coating for carbon steel.

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Electrochemical investigation of ceria nanoparticles as a corrosion inhibitor for steel in alkaline medium

Bourenane

Hamlaoui

Pedraza

2023

Materials & Corrosion

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This work investigates the synthesis and the corrosion inhibitor efficiency ceria nanoparticles may exert on steel reinforcement in an alkaline solution of saturated Ca(OH)2 + 0.5 M CaCl2 up to 50°C. The corrosion mechanisms are thoroughly investigated by electrochemical and various characterization techniques. The electrochemical results show that ceria nanoparticles act as an anodic inhibitor and provide maximum inhibition efficiency (80%) at a concentration of 800 ppm. The resulting surface is smooth and free from corrosion products due to the formation of a physically adsorbed film according to the thermodynamic calculations.

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Self-healing effect of ceria electrodeposited thin films on stainless steel in aggressive 0.5 mol/L NaCl aqueous solution

Cited by 31 publications

References 56 publications

Effect of the pH of the electrolyte on the formation and on the corrosion properties of ceria based coating on carbon steel

Effect of the pH of the electrolyte on the formation and on the corrosion properties of ceria based coating on carbon steel

Deposition of Zinc–Cerium Coatings from Deep Eutectic Ionic Liquids

Electrochemical investigation of ceria nanoparticles as a corrosion inhibitor for steel in alkaline medium

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