Synthesis and characterisation of thin cerium oxide coatings elaborated by cathodic electrolytic deposition on steel substrate

Creus, J.; Brezault, F.; Rébéré, C.; Gadouleau, M.

doi:10.1016/j.surfcoat.2005.04.027

Cited by 99 publications

(51 citation statements)

References 25 publications

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“…cation (Raman mode in metal dioxides with fluorite structure), while the weaker band at 250 cm can be referred to cubic CeO 2 second order scattering [43,44]. The main line at 452 cm -1 is in good agreement with the value of 454.2 cm -1 reported in [45] for ceria films cathodically deposited on steel substrate from Ce(III) chloride solution, while it is sensibly different from the frequency of 466 cm -1 often reported in the literature for single crystal CeO 2 . The peak around 600 cm -1 is usually assigned to the oxygen vacancies due to the nonstoichiometry of CeO 2 and often reported in literature for nanocrystalline ceria [46,47].…”

Section: Resultssupporting

confidence: 86%

From ceria nanotubes to nanowires through electrogeneration of base

2009

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The preparation of Ce(OH) 3 /CeO 2 nanostructures (NSs) through electrogeneration of base into anodic alumina membranes was studied. The effects of solvent (alcohol and/or water), Ce 3? partner anion nature (chloride or nitrate) and concentration, applied potential or current density in driving the morphology toward nanowires (NWs) and/or nanotubes (NTs) was described. The structural analysis performed by X-Ray Diffraction and Raman Spectroscopy allowed to evidence that the presence of Ce(IV) into the nanostructures strongly depends on the oxygen content in the growing environment.

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Section: Resultssupporting

confidence: 86%

From ceria nanotubes to nanowires through electrogeneration of base

2009

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“…Studies like the one of Olivier et al 4 have shown that cerium-based conversion coatings (CeCC) can be the most effective ones compared to other lanthanide-based layers, such as yttrium and lanthanum. Deposition and corrosion properties of CeCC have been studied not only on aluminum alloys but also on other such as magnesium alloys [5][6][7][8] and steel [9][10][11][12] . Most of the research on CeCC on aluminum alloys has been widely focused on protection of high strength alloys with aerospace applications such as AA2024 [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32] and AA7075 20,[33][34][35][36][37][38][39][40] .…”

Section: Introductionmentioning

confidence: 99%

Deposition and Characterization of Cerium-Based Conversion Coating on HPDC Low Si Content Aluminum Alloy

Eslami¹,

Fedel²,

Speranza³

et al. 2017

J. Electrochem. Soc.

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Cerium-based conversion coatings were deposited on high pressure die cast (HPDC) Al-Si alloys using an immersion method. Hydrogen peroxide and sodium chloride were added to the conversion solution to accelerate the coating formation and to understand its formation mechanism. These studies showed that the deposition of cerium hydroxide/oxide conversion layer starts from iron-rich intermetallic particles, which are located inside the eutectic region and then the coating growth continues to cover the entire alloy surface. This phenomenon passivates the active interfaces between iron-rich intermetallic particles and/or the eutectic silicon phase and the aluminum matrix, which are prone to localized corrosion in chloride ions containing environments. Accordingly, values of the total impedance in EIS measurements significantly increased for the treated substrates. Morphologies of the conversion coatings and the oxidation state of cerium compounds were found to be dependent on the composition of the solution and the presence of chloride ions and/or hydrogen peroxide. Aluminum alloy with higher silicon content showed a more active surface during immersion in the conversion solution. This makes it more difficult to be treated using aggressive conversion solutions.

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“…Some researches demonstrated that treatments with aqueous solutions of rare earth salts inhibited the corrosion of aluminium alloys [4][5][6], steels [7][8], galvanized steels [9][10], and magnesium and its alloys [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Improvement in corrosion resistance of magnesium coating with cerium treatment

et al. 2009

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Corrosion protection afforded by a magnesium coating treated in cerium salt solution on steel substrate was investigated using open circuit potential, polarization curves, and electrochemical impedance spectroscopy (EIS) in 0.005 M sodium chloride solution (NaCl). The morphology of the surface was characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD). The cerium treated coating was obtained by immersion in CeCl 3 solution. The results showed that the corrosion resistance of the treated magnesium coating was improved. The corrosion potential of the treated coating was found to be nobler than that of the untreated magnesium coating and the corrosion current decreased significantly. Impedance results showed that the cerium treatment increased corrosion protection. The improvement of anti-corrosion properties was attributed to the formation of cerium oxides and hydroxides that gave rise to a physical barrier effect.

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Synthesis and characterisation of thin cerium oxide coatings elaborated by cathodic electrolytic deposition on steel substrate

Cited by 99 publications

References 25 publications

From ceria nanotubes to nanowires through electrogeneration of base

From ceria nanotubes to nanowires through electrogeneration of base

Deposition and Characterization of Cerium-Based Conversion Coating on HPDC Low Si Content Aluminum Alloy

Improvement in corrosion resistance of magnesium coating with cerium treatment

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