Corrosion Resistance of Ni/Al2O3 Nanocomposite Coatings

Kucharska, B.; Brojanowska, A.; Popławski, K.; Sobiecki, J. R.

doi:10.5755/j01.ms.22.1.7407

Cited by 2 publications

(4 citation statements)

References 3 publications

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“…Moreover, all Ni-Al2O3 composite coatings preferential grew along the (111) planes and exhibited a significant (220) diffraction peak. No separate alumina peak was observed may be due to its amorphous nanocrystalline nature and low content in the coating and high intensity of nickel diffraction peaks [30] . During the hardness testing process, the coating hardness test will be affected by the substrate hardness.…”

Section: Xrd Spectramentioning

confidence: 94%

Electrodeposition of Ni and Ni-Al2O3 Composite Coatings on Q345 Steels under Different Current Densities

Xie,

Li,

et al. 2024

Preprint

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The effect of current density of electrodeposition on the morphology, hardness, and corrosion resistance of the Ni coatings and Ni-Al2O3 coatings on Q345 steels were investigated. The surface of Ni coatings exhibited the cellular structure, while the surface of Ni-Al2O3 composite coatings showed the finer protrusions structure. The thickness of all coatings increased as the current density of electrodeposition increased from 1.5 A/dm2 to 3.0 A/dm2. After coating, the hardness and corrosion resistance of the Q345 steels were significantly enhanced. Furthermore, for the Ni coatings and Ni-Al2O3 coatings, the highest hardness and best anticorrosion property were obtained at 2.5 A/dm2 of electrodeposition current density. Compared with the Ni coatings, the co-deposition of Al2O3 nanoparticles improved the hardness of Ni-Al2O3 coating due to the second phase strengthen, but reduced the thickness and corrosion resistance due to more defects caused by the coelectrodeposition of the Al2O3 particles.

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Section: Xrd Spectramentioning

confidence: 94%

Electrodeposition of Ni and Ni-Al2O3 Composite Coatings on Q345 Steels under Different Current Densities

Xie,

Li,

et al. 2024

Preprint

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“…Electrodeposition is a simple, inexpensive and versatile one, being widely used in industry. [1][2][3][4] The structure and properties of composite surface coatings can be designed through a careful selection of the matrix and dispersed phase. Among the wide variety of coatings used for tribological applications, nickel composite coatings with alumina particles appear to have a very promising potential.…”

Section: Introductionmentioning

confidence: 99%

“…2,4,[7][8][9][10] However, the recent emergence of nanotechnologies has led to scientific and technological interest in the electrodeposition of Ni/Al 2 O 3 nanocom-posite coatings with Al 2 O 3 particles smaller than 100 nm, mainly devoted to an increase in the abrasion resistance of material surfaces. 3,[5][6][11][12] These performance characteristics are affected primarily by the process parameters, including the electrolyte composition (e.g., the use of organic growth inhibitors), as well as the type (DC, PC, PRC), amplitude and frequency of the used current. Proper optimization of electrodeposition process of Ni/ nm Al 2 O 3 coatings is faced with the fundamental problem of the agglomeration of particles in the electrolyte, and therefore an insufficient and uneven distribution of nanoparticles in the nickel matrix.…”

Section: Introductionmentioning

confidence: 99%

“…2 The researchers' reports include mainly corrosion rate determination. 3,4,[11][12][13][14][15] This allows a good comparison of materials in terms of corrosion resistance, but does not give information about the causes of the corrosion changes and the mechanism of corrosion. Electrochemical impedance spectroscopy can provide significant information regarding the corrosion mechanisms and susceptibility of materials to corrosion in the exposed environment.…”

Section: Introductionmentioning

confidence: 99%

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The effect of current types on the microstructure and corrosion properties of Ni/NANOAl2O3 composite coatings

Kucharska¹,

Krawczyńska²,

Rożniatowski³

et al. 2017

Mater. Tehnol.

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Nickel matrix composite coatings with a ceramic disperse phase have been widely investigated due to their enhanced properties, such as higher hardness and wear resistance in comparison to pure nickel. This paper describes the research on nickel and nickel-alumina coatings. The coatings were obtained from a Watts bath with the presence of nickel grain-growth inhibitors by DC (direct current), PC (pulse current) and PRC (pulsed reverse current) plating. The study includes the composite coatings of microcrystalline and nanocrystalline Ni matrix and nanometric Al2O3 particles. In order to ensure uniform co-embedding of the disperse phase particles with a nickel matrix and producing a stable suspension, mechanical agitation was also used. It was proved in our previous investigations that mechanical agitation is the best way of embedding nano-alumina particles in a nickel matrix. The effect of the electroplating techniques on the microstructure (SEM -scanning electron microscopy, STEMscanning transmission electron microscopy, XRD -X-ray diffraction, surface profile) of Ni and Ni/Al2O3 composite coatings was investigated. In order to evaluate the corrosion resistance of the produced coatings, the corrosion studies were carried out by electrochemical impedance spectroscopy and the potentiodynamic method in a 0.5-M NaCl solution. Bode diagrams obtained by impedance spectroscopy method were established. The equivalent electric circuit and its parameters were determined to interpret impedance spectra. The corrosion current and corrosion potential were determined. Investigations of the corrosion damage to the produced surface layers were performed by scanning microscope techniques. The completed studies have shown that the type of current significantly affects the structure of the nickel and composite coatings, as well as their corrosion properties. Keywords: nanocomposites, Ni/Al 2 O 3 coatings, corrosion resistance, pulse electrodeposition Matrike nikljevih kompozitnih oblog, razpr{enih s kerami~no fazo, so pogosto raziskovali zaradi njihovih izbolj{anih lastnosti, kot na primer zaradi ve~je trdote in odpornosti proti obrabi, v primerjavi s~istim nikljem.^lanek opisuje raziskave na nikljevih in nikelj-aluminijevih premazih. Prevleke so bili narejene iz Watts kopeli s prisotnostjo inhibitorjev rasti zrn niklja s povr{insko obdelavo z enosmernim (DC), impulznim (PC) in impulzno-povratnim (PRC) tokom. [tudija vklju~uje mikrokristalne in nanokristalne prevleke kompozitov Ni matrike in nanometrskih Al2O3 delcev. Da bi zagotovili enotno delovanje vgrajevanja disperzne faze delcev z matriko Ni in pripravo stabilne suspenzije, je bilo uporabljeno tudi mehansko spodbujanje z me{anjem. Dokazano je bilo, da je mehanska spodbuda najbolj{i na~in utrjevanja delcev aluminijevega oksida v Ni matriki. Raziskan je bil u~inek tehnik povr{inske obdelave na mikrostrukturo (SEM -elektronska mikroskopija, STEM -transmisijska elektronska mikroskopija, XRD -rentgenska difrakcija, povr{inski profil) niklja in Ni/Al2O3 kompozita. Da bi ocenili odpo...

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Corrosion Resistance of Ni/Al2O3 Nanocomposite Coatings

Cited by 2 publications

References 3 publications

Electrodeposition of Ni and Ni-Al2O3 Composite Coatings on Q345 Steels under Different Current Densities

Electrodeposition of Ni and Ni-Al2O3 Composite Coatings on Q345 Steels under Different Current Densities

The effect of current types on the microstructure and corrosion properties of Ni/NANOAl2O3 composite coatings

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