Correlations between electrochemical mechanisms and growth of ceria based coatings onto nickel substrates

Bouchaud, B.; Balmain, J.; Bonnet, Gilles; Pedraza, F.

doi:10.1016/j.electacta.2012.10.112

Cited by 25 publications

(15 citation statements)

References 61 publications

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“…For PEO coatings, a nano-scale corrosion process might occur in the inner layer leading to an increase in the pH, inducing Ce 3+ deposition that can stabilize the inner layer. The mechanism of deposition with reactions can be found elsewhere [52,53].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Silicate-based Plasma Electrolytic Oxidation (PEO) coatings with incorporated CeO2 particles on AM50 magnesium alloy

2015

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Section: Accepted Manuscriptmentioning

confidence: 99%

Silicate-based Plasma Electrolytic Oxidation (PEO) coatings with incorporated CeO2 particles on AM50 magnesium alloy

2015

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“…The metallic coating systems such as diffusion aluminide and NiAl overlay coating with RE additives are believed to have the capability to form a thin, strong and uniform alumina layer, which acts as an effective barrier to prevent oxidation and deterioration of the substrate alloys. According to [28], have stronger oxide-forming ability than Al may effect oxidation performance in Nickel-based alloy. RE addition has capability to reduce oxidation rate on Al outward diffusion and this effect may happen when RE ions are relatively larger and has low solubility.…”

Section: Reactive Element In Bond Coatmentioning

confidence: 99%

Review on Nickel Aluminide based Bond Coat Properties and Oxidation Performance for Thermal Barrier Coating (TBC) Application

Kadir

Manap²,

Satgunam³

et al. 2018

IJET

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Thermal Barrier Coating (TBC) as protective coatings are applied to maintain efficiency and prevent structural failures mainly in gas turbine system. This paper reviews on recent bond coating from Nickel aluminide bond coat with addition of Reactive Elements (RE). This paper also reviews the major concern in TBC with presence of different Reactive Element (RE) added in term of RE composition, properties and oxidation test performance. Recent studies are more focusing on few REs including Ce, Hf, La, Y and Zr based on oxidation property test results. The comparisons clearly show that ceramics addition are superior for bond coat mechanical and thermal properties improvement while RE addition such as Ce and Zr present excellent oxidation performance at 900°C and above.

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“…A significant change in the current intensity was observed for solutions based on the mixture of La-and Y-nitrate salts, leading to an evident hysteresis in the reverse scan, in agreement with the previous research on rare-earth conversion coatings. 3,19 Additionally, we obtain the best current density with the [La 3+ ]/[Y 3+ ] ratio of 3/1 since oxygen-and water-reduction reactions provide for higher amounts of OH -ions necessary for obtaining a thicker deposit with a more compact structure, able to stop the diffusion of oxygen dissolved to reduce or prevent corrosion.…”

Section: Lanthanum-and Yttrium-conversion Coatingsmentioning

confidence: 99%

Improvement of the corrosion behavior of aluminum alloy 6061-T6 with yttrium and lanthanum conversion coatings

Bekhiti¹,

Creus²,

Mesrati³

et al. 2018

Mater. Tehnol.

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In this study, yttrium-and lanthanum-based conversion coatings were deposited on a 6061-T6 aluminum alloy with cathodic electrochemical deposition using Y-and La-nitrate precursors. The optimum] ratio was evaluated with cyclic-voltammetry (CV) curves. The influence of the conversion-treatment time was studied by performing the experiment for periods of 10 and 20 minutes. Optical microscopy was used to determine the coating morphology and the anticorrosive properties were studied using linear polarization (LP) and electrochemical impedance spectroscopy (EIS) in a 5-g/L NaCl solution. The electrochemical results revealed an obvious improvement in the corrosion resistance against the aggressive media after an extended imersion test for 48 h, indicating a good efficiency of the Y-and La-conversion coating. Keywords: aluminum alloy, 6061-T6, conversion coating, rare earth elements, lanthanum, yttrium V pri~ujo~em~lanku avtorji opisujejo nanos konverzijske (pretvorbene) prevleke na osnovi itrija in lantana na Al zlitino 6061-T6 s katodno elektrokemijsko depozicijo (nanosom) z uporabo Y in La-nitratnih prekurzorjev (izhodnih surovin). S cikli~nimi voltametri~nimi (CV; angl.: Cyclic Voltammetry) krivuljami so ovrednotili optimalno razmerje[tudirali so vplive~asa na pretvorbo z izvedbo 10 in 20 minutnih preizkusov. S pomo~jo svetlobnega mikroskopa so podali morfologijo prevleke. S pomo~jo linearne polarizacije (LP) in elektrokemi~ne impedan~ne spektroskopije (EIS) v 5 g/L NaCl pa so {tudirali korozijsko odpornost prevleke. Rezultati elektrokemijskih preiskav so pokazali jasno izbolj{anje protikorozijske za{~ite v agresivnem mediju po podalj{anem 48 urnem potopnem preizkusu. To ka`e na dobro u~inkovitost izbrane obdelave za izdelavo Y in La pretvorbenih prevlek. Klju~ne besede: zlitina na osnovi aluminija, 6061-T6, pretvorbena prevleka, redki elementi zemlje, lantan, itrij

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Correlations between electrochemical mechanisms and growth of ceria based coatings onto nickel substrates

Cited by 25 publications

References 61 publications

Silicate-based Plasma Electrolytic Oxidation (PEO) coatings with incorporated CeO2 particles on AM50 magnesium alloy

Silicate-based Plasma Electrolytic Oxidation (PEO) coatings with incorporated CeO2 particles on AM50 magnesium alloy

Review on Nickel Aluminide based Bond Coat Properties and Oxidation Performance for Thermal Barrier Coating (TBC) Application

Improvement of the corrosion behavior of aluminum alloy 6061-T6 with yttrium and lanthanum conversion coatings

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