Electrodeposition of nanocrystalline Ni–Cu alloy from environmentally friendly lactate bath

Kamel, Mahmoud; Anwer, Zeinab M.; Abdel-Salam, I. T.; Ibrahim, Izni Syahrizal

doi:10.1002/sia.5525

Cited by 15 publications

(3 citation statements)

References 31 publications

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“…The overpotential often tends to increase, the deposit's crystal size decreases. Additionally, there is a decrease in the tendency to create and develop dendrites [49]. All the Co-Cu alloy plates that were prepared are, in general, attached to the steel substrate.…”

Section: Morphology and Structure Of Co-cu Alloy Coatingsmentioning

confidence: 99%

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Electrodeposition of Nanostructured Co–Cu Thin Alloy Films on to Steel Substrate from an Environmentally Friendly Novel Lactate Bath under Different Operating Conditions

Alsaiari,

Kamel,

Mohamed

2024

Coatings

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A new lactate bath was proposed to deposit Co–Cu thin alloy films in nanostructure form onto a steel cathode. The deposition bath contained CuSO4.5H2O, CoSO4.7H2O, CH3CHOHCOOH, and anhydrous Na2SO4 at pH 10. The effects of [Co2+]/[Cu2+] molar ratios, lactate ion concentration, current density (CD), and bath temperature on cathodic polarization, cathodic current efficacy (CCE), composition, and structure of the Co–Cu alloys were investigated. The new bath had a high cathodic current efficiency of 85%, which increased with the applied CD. However, it decreased as the temperature increased. The produced coatings have an atomic percentage of Cu ranging from 19.8 to 99%. The deposition of the Co–Cu alloy belonged to regular codeposition. The Co content of the deposit increased with the amount of Co2+ ions in the bath, lactate concentration, and current density but decreased as the temperature increased. Cobalt hexagonal close-packed (HCP) and copper-rich, face-centered cubic (FCC) Co–Cu phases combine to form the polycrystalline structure of the electrodeposited Co–Cu alloy. The average crystallite size ranges between 46 and 89 nm. Energy dispersive X-ray (EDX) examination confirmed that the deposit contained Cu and Co metals. The throwing power and throwing index of the alkaline lactate bath were evaluated and found to be satisfactory.

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Section: Morphology and Structure Of Co-cu Alloy Coatingsmentioning

confidence: 99%

“…Lactate ions can be employed as a substitute complexing agent for the electrodeposition of metal coatings. When combined with Cu (II) and other metal (II) ions, lactate anions form stable complexes [49][50][51][52].…”

Section: Introductionmentioning

confidence: 99%

Electrodeposition of Nanostructured Co–Cu Thin Alloy Films on to Steel Substrate from an Environmentally Friendly Novel Lactate Bath under Different Operating Conditions

Alsaiari,

Kamel,

Mohamed

2024

Coatings

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“…A high current density causes the crystal plane to be oriented in the (111) plane, the lattice size to be smaller, and the atomic distance to be less (20). The grain size becomes smaller when the current density is high, and the morphological shape resembles that of a cauliflower (21). As a result of a high current density, the coating will be thicker, and the composition of the Ni weight fraction will also be higher.…”

Section: Introductionmentioning

confidence: 99%

Effect of Current Density on Magnetic and Hardness Properties of Ni-Cu Alloy Coated on Al via Electrodeposition

Rosyidan,

Kurniawan,

Soegijono

et al. 2024

IJE

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Nickel (Ni)-rich single-phase nickel-copper (Ni-Cu) alloy coatings were produced on aluminum (Al) substrates by electrodeposition in stabilized citrate baths. Electrodeposition experiments were performed at four different current densities. Increasing the current density resulted in the metal deposition rate increasing faster than the hydrogen evolution rate; thus, the cathodic current efficiency increased. The crystal systems of the Ni-Cu alloys were face center cubic (fcc), with the (111) plane as the preferred crystal plane. Scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDS) measurements showed that the Ni content in the coating increased with increasing current density. The Ni-Cu 40 sample had the most Ni content and showed a homogeneous and compact morphology. It was found that the higher the concentration of Ni in the solution, the smaller the grain size. Measurements recorded with a vibrating sample magnetometer (VSM) showed that the Ni-Cu 40 sample provided magnetic saturation, with the highest value being 0.108 emu/g. The microhardness method produced 404 HV on the Ni-Cu 40 sample. In conclusion, higher current densities were associated with a higher Ni composition and increased thickness, which were responsible for the increases in the magnetic properties and hardness.

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Nanocrystalline Deposits

Péter

2021

Monographs in Electrochemistry

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Electrodeposition of nanocrystalline Ni–Cu alloy from environmentally friendly lactate bath

Cited by 15 publications

References 31 publications

Electrodeposition of Nanostructured Co–Cu Thin Alloy Films on to Steel Substrate from an Environmentally Friendly Novel Lactate Bath under Different Operating Conditions

Electrodeposition of Nanostructured Co–Cu Thin Alloy Films on to Steel Substrate from an Environmentally Friendly Novel Lactate Bath under Different Operating Conditions

Effect of Current Density on Magnetic and Hardness Properties of Ni-Cu Alloy Coated on Al via Electrodeposition

Nanocrystalline Deposits

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