Characterization of Co–Cr–Fe–Mn–Ni High-Entropy Alloy Thin Films Synthesized by Pulse Electrodeposition: Part 2: Effect of Pulse Electrodeposition Parameters on the Wettability and Corrosion Resistance

Yoosefan, Fateme; Ashrafi, Ali; Vaghefi, S M Monir

doi:10.1007/s12540-019-00584-w

Cited by 28 publications

(11 citation statements)

References 25 publications

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“…Both of them conclude that Al has a negative effect on the corrosion properties. CoCrFeNi and CoCrCuFeNi films synthesised by vacuum hot sintering [52], CoCrFeMnNi by laser cladding [53] and by electrodeposition [54], and CoCrFeNbNi by plasma spraying [55] effectively protected the substrates and showed similar corrosion resistance to stainless steel 304L in NaCl and in H2SO4. CoCrFeMnNi was more sensitive to pitting corrosion in NaCl and over time the resistance of the passive film was decreasing due to the corrosion of Cr depleted dendrites in H2SO4 [53].…”

Section: Multicomponent Coatings and Thin Filmsmentioning

confidence: 95%

Catalytically active and corrosion resistant cobalt-based thin films

Linder

2022

Linköping Studies in Science and Technology. Licentiate Thesis

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Section: Multicomponent Coatings and Thin Filmsmentioning

confidence: 95%

Catalytically active and corrosion resistant cobalt-based thin films

Linder

2022

Linköping Studies in Science and Technology. Licentiate Thesis

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“…Where i corr0 (in A/cm 2 ) represents the current density of corrosion for substrate and i corr (in A/cm 2 ) for the coating [40].…”

Section: Potentiodynamic Polarizationmentioning

confidence: 99%

Experimental studies on wear and corrosion resistance of pulse electrodeposited Ni-TiO₂ nanocomposite coatings on AISI 304 stainless steel

VELAYUDHAM¹,

ANNAMALAI²

2022

Mater. Res. Express

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Nickel-nano titanium oxide (Ni-TiO2) composite coatings were developed on stainless steel 304 substrate using pulsed electro-deposition technique. Experiments were carried out employing L_27 orthogonal array, taking current density, frequency, and duty cycle as prime parameters. Coating characterization was done using FESEM with EDAX and XRD. Applying the Response Surface Methodology optimization method, the optimized values of the parameters were identified as duty cycle, frequency and current density with values of 24 %, 10 Hz and 0.6 A / cm2 respectively. Vickers micro-hardness, surface roughness, wear resistance and corrosion resistance were measured initially for the as-coated sample. The sample that yielded the optimum parameters were then heat treated for an hour at 400°C in a closed furnace and quenched in SAE 40 grade oil. Test results of post heat-treated sample produced maximum microhardness of 446.45 Hv, reduced surface roughness of 0.292 µm, superior wear rate of 3.20E-07 mm3/Nm and corrosion protection efficiency of 94.52 % of NiTiO2 coating at low frequency, along with enhanced wear and corrosion resistance as compared with the as-coated sample.

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“…Because of the excellent corrosion properties of these HEAs, they have also been synthesized as coatings and thin films. CoCrFeNi and CoCrCuFeNi films synthesized by vacuum hot sintering and CoCrFeMnNi by laser cladding on steel and CoCrFeMnNi by electrodeposition on copper have been reported as effectively protecting the substrates and showed similar corrosion resistance to stainless steel 304 in NaCl and in H 2 SO 4 . The corrosion properties of AlCoCrFeNi thin films deposited by RF magnetron sputtering have been studied by Gao et al and Shi et al However, the corrosion resistance in an alkaline environment is yet to be reported to ensure that the films are suitable, for instance, for an alkaline battery application.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Resistance and Catalytic Activity toward the Oxygen Reduction Reaction of CoCrFe_xNi (0 ≤ x ≤ 0.7) Thin Films

Linder

Rao

Boyd

et al. 2022

ACS Appl. Energy Mater.

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Corrosion resistance and catalytic activity toward the oxygen reduction reaction (ORR) in an alkaline environment are two key properties for water recombination applications. In this work, CoCrFe x Ni (0 ≤ x ≤ 0.7) thin films were deposited by magnetron sputtering on polished steel substrates. The native passive layer was 2–4 nm thick and coherent to the columnar grains determined by transmission electron microscopy. The effect of Fe on the corrosion properties in 0.1 M NaCl and 1 M KOH and the catalytic activity of the films toward ORR were investigated. Electrochemical impedance spectroscopy and potentiodynamic polarization measurements indicate that CoCrFe0.7Ni and CoCrFe0.3Ni have the highest corrosion resistance of the studied films in NaCl and KOH, respectively. The high corrosion resistance of the CoCrFe0.7Ni film in NaCl was attributed to the smaller overall grain size, which leads to a more homogeneous film with a stronger passive layer. For CoCrFe0.3Ni in KOH, it was attributed to a lower Fe dissolution into the electrolyte and the build-up of a thick and protective hydroxide layer. Scanning Kelvin probe force microscopy showed no potential differences globally in any of the films, but locally, a potential gradient between the top of the columns and grain boundaries was observed. Corrosion of the films was likely initiated at the top of the columns where the potential was lowest. It was concluded that Fe is essential for the electrochemical activation of the surfaces and the catalytic activity toward ORR in an alkaline medium. The highest catalytic activity was recorded for high Fe-content films (x ≥ 0.5) and was attributed to the formation of platelet-like oxide particles on the film surface upon anodization. The study showed that the combination of corrosion resistance and catalytic activity toward ORR is possible for CoCrFe x Ni, making this material system a suitable candidate for water recombination in an alkaline environment.

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Characterization of Co–Cr–Fe–Mn–Ni High-Entropy Alloy Thin Films Synthesized by Pulse Electrodeposition: Part 2: Effect of Pulse Electrodeposition Parameters on the Wettability and Corrosion Resistance

Cited by 28 publications

References 25 publications

Catalytically active and corrosion resistant cobalt-based thin films

Catalytically active and corrosion resistant cobalt-based thin films

Experimental studies on wear and corrosion resistance of pulse electrodeposited Ni-TiO₂ nanocomposite coatings on AISI 304 stainless steel

Corrosion Resistance and Catalytic Activity toward the Oxygen Reduction Reaction of CoCrFe_xNi (0 ≤ x ≤ 0.7) Thin Films

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Characterization of Co–Cr–Fe–Mn–Ni High-Entropy Alloy Thin Films Synthesized by Pulse Electrodeposition: Part 2: Effect of Pulse Electrodeposition Parameters on the Wettability and Corrosion Resistance

Cited by 28 publications

References 25 publications

Catalytically active and corrosion resistant cobalt-based thin films

Catalytically active and corrosion resistant cobalt-based thin films

Experimental studies on wear and corrosion resistance of pulse electrodeposited Ni-TiO2 nanocomposite coatings on AISI 304 stainless steel

Corrosion Resistance and Catalytic Activity toward the Oxygen Reduction Reaction of CoCrFexNi (0 ≤ x ≤ 0.7) Thin Films

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Experimental studies on wear and corrosion resistance of pulse electrodeposited Ni-TiO₂ nanocomposite coatings on AISI 304 stainless steel

Corrosion Resistance and Catalytic Activity toward the Oxygen Reduction Reaction of CoCrFe_xNi (0 ≤ x ≤ 0.7) Thin Films