Effect of rhenium on corrosion behavior of electrodeposited Co-Cu alloy coating at room temperature and high temperature

Ye, Lin; Chen, Yiheng; Tong, Zhangzhang; Zhang, Hu; Gao, Zhiming

doi:10.1016/j.mtcomm.2023.105579

Cited by 2 publications

(2 citation statements)

References 11 publications

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“…Moreover, at a high current density (11.11 mA cm −2 ), needle-shaped crystallites are observed, as well as larger ones with a spheroidal shape (Figure 9b). The bubbles of hydrogen gas cause the deposit to become rougher with a more dendritic or nodular morphology [73]. This shape might be ascribed to the deposit's increase in Co% as the current density increases.…”

Section: Morphology and Structure Of Co-cu Alloy Coatingsmentioning

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 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%

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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“…Rhenium is a rare-earth metal that is widely used in heat-resistant superalloys, platinum-rhenium catalysts, and prospective structural materials for rocket and space technology [1][2][3][4][5][6][7][8][9][10][11][12][13]. The trend of providing various industries with high-tech products in the next 150 years will lead to the exhaustion of the proven reserves of rhenium in the Earth's crust [14].…”

Section: Introductionmentioning

confidence: 99%

Melting Behavior and Densities of K2B2OF6 Melts Containing KReO4

Chernyshev,

Apisarov,

Isakov

et al. 2023

Processes

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Methods of simultaneous thermal analysis (differential scanning calorimetry, thermogravimetry) and an analysis of cooling curves were used to study the melting of K2B2OF6–(0–15 wt. %) KReO4 melts. The synthesis of K2B2OF6 was performed by alloying KF, KBF4, and B2O3 components. The liquidus temperature dependence on the content of potassium perrhenate in the K2B2OF6–(0–15 wt. %) KReO4 melts was determined. It was found that the addition of up to 6 wt. % KReO4 caused an increase in the melt liquidus temperature to 733 K. Further increases in potassium perrhenate did not change the temperature of the primary crystallization (733 ± 5 K) of the K2B2OF6–KReO4 melt. This fact testifies to the presence of the monotectic reaction. It was found that the relative loss of mass of the K2B2OF6–(0–15 wt. %) KReO4 melts did not exceed 2.1%. The delamination of the K2B2OF6–KReO4 melt was revealed according to the values of the primary crystallization temperatures (liquidus temperatures) in different layers of the melt. The density of the K2B2OF6–KReO4 melts as a function of potassium perrhenate content (0–15 wt. %) was investigated at 628–933 K. The temperature dependence of the K2B2OF6–KReO4 melts’ densities was recorded. They are presented as linear functions. The curves of the density temperature dependence of the K2B2OF6–KReO4 melts were used to determine the critical temperatures, i.e., the boundaries of the miscibility gap. The miscibility gap of the K2B2OF6–KReO4 melts is limited to 1 wt. % and 15 wt. % KReO4 content.

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Effect of rhenium on corrosion behavior of electrodeposited Co-Cu alloy coating at room temperature and high temperature

Cited by 2 publications

References 11 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

Melting Behavior and Densities of K2B2OF6 Melts Containing KReO4

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