Nickel and Chromium Plating

Dennis, J.K.; Such, T. E.

doi:10.1533/9781845698638

Cited by 141 publications

(71 citation statements)

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“…Para o banho eletrolítico, foi utilizada uma fonte marca INSTUTHERM, modelo DC POWER SUPPLY FA-3030 e um agitador magnético marca BIOMIXER, modelo 78HW-1. A composição do banho de níquel Watts é apresentada na Tabela 1 [4].O tempo total de cada eletrodeposição foi de 3horas. O banho foi submetido à agitação através de agitador magnético (aproximadamente 600rpm) e a temperatura aplicada foi de 60ºC.…”

Section: Materiais E Métodosunclassified

“…Recobrimentos de Ni em aço carbono produzem considerável melhora do limite de fadiga, principalmente quando se tem algum tratamento posterior à eletrodeposição para a eliminação de eventuais tensões superficiais [2]. A adição de partículas de Nb ao banho eletrolítico de níquel Watts produz recobrimento de níquel metálico com a presença de particulados de nióbio que concorrem para aumento da dureza superficial [4][5][6]. Aumento de dureza superficial está correlacionado com aumento de resistência à fadiga [2], daí o recobrimento de Ni-Nb ser favorável à melhora dessa propriedade do aço [7,8].…”

Section: Introductionunclassified

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Efeito Da Eletrodeposição De Níquel-Nióbio No Comportamento Em Fadiga De Um Aço Sae 1020

Nunes¹,

Teixeira²,

Signoretti³

et al. 2017

Anais Do Congresso Anual Da ABM

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Section: Materiais E Métodosunclassified

Section: Introductionunclassified

Efeito Da Eletrodeposição De Níquel-Nióbio No Comportamento Em Fadiga De Um Aço Sae 1020

Nunes¹,

Teixeira²,

Signoretti³

et al. 2017

Anais Do Congresso Anual Da ABM

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“…2d for a pure nickel coating deposited at 25 A dm ¹2 . The mechanism of formation of striations is not completely understood but has been attributed to the periodic incorporation of additives present in the plating solution (Dennis & Such, 1993). In alloy plating, Drewien et al (1991) have shown that the striations correlate with periodic fluctuations of composition of iron-zinc electrodeposits.…”

Section: Uniform Coatingsmentioning

confidence: 99%

Structure of electrodeposited graded composite coatings of Ni–Al–Al₂O₃

Barmak

Banovic

Petronis

et al. 1997

Journal of Microscopy

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SummaryThe structure of electrodeposited composite coatings of Ni-Al-Al 2 O 3 , with Ni as the matrix and Al and Al 2 O 3 as second-phase particles, was investigated using light microscopy and scanning electron microscopy. Ni coatings with no particles, which were used as reference samples, had progressively coarser structures with increasing current density. Co-deposition with Al resulted in refinement of the Ni matrix structure at high (>10 A dm ¹2 ) current densities. For single-particle baths, the co-deposition of Al 2 O 3 was more strongly affected by current density and bath particle content than was the co-deposition of Al. However, for baths containing both Al and Al 2 O 3 the amount of incorporated Al 2 O 3 no longer depended on current density. With the choice of appropriate conditions, coatings of Ni with up to 39 vol.% Al 2 O 3 were made. Similar experiments with Al yielded a maximum of 17 . 5 vol.% only. Uniform and graded mixed-particle coatings were also produced. When coatings containing Al were annealed, the reaction of the two elements resulted in the formation of either single-phase g or two-phase g-g 0 alloys, in agreement with the equilibrium phase diagram.

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“…The presence of boric acid in the nickel bath solution inhibits the formation of bubbles insoluble Ni (OH)2. These bubbles disturb homogeneous deposition of nickel on the substrate surface and affect the pH of the solution [7][8].…”

Section: Introductionmentioning

confidence: 99%

“…Experimental data indicate that the hardness of the electroplated nickel layer increases with a higher concentration of nickel ions in the bath and current densities below 10A/dm 2 . For best performance of the electroplating process, the bath pH should be maintained at around 3.5 and temperature approximately 60°C [7].…”

Section: Introductionmentioning

confidence: 99%

Effect of Nickel-Niobium Coating on Fatigue Resistance of SAE 1020 Carbon Steel

Lacerda¹,

Teixeira²,

Signoretti³

et al. 2017

IJERT

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-Effect of nickel-niobium coating by electrodeposition on the fatigue resistance of SAE 1020 carbon steel is studied in this work. The nickel-niobium coating was performed using a nickel Watts bath with added niobium powder. The specimens for fatigue tests were taken from SAE 1020 steel bar with 7.94mm (5/16 '') diameter. The fatigue tests were carried out by rotary bending load control with loading balance. It employed a rotation speed of approximately 1500rpm (25Hz). Vickers microhardness tests were performed on steel and deposited layer of nickel-niobium. Analysis of the electroplated layer connection interface in the steel and fatigue fractures were performed by scanning electron microscopy (SEM). The fatigue tests were performed in order to obtain S-N curves (Wöhler curves). It was observed that nickel-niobium coating gave only a tendency to increase the fatigue strength of the steel, although the coating layer has shown high hardness compared to the steel. The detachment of the deposited nickelniobium layer was regarded as the main cause of noncontribution of the increase in fatigue limit coated steel compared to the same in its original condition.

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Nickel and Chromium Plating

Cited by 141 publications

References 0 publications

Efeito Da Eletrodeposição De Níquel-Nióbio No Comportamento Em Fadiga De Um Aço Sae 1020

Efeito Da Eletrodeposição De Níquel-Nióbio No Comportamento Em Fadiga De Um Aço Sae 1020

Structure of electrodeposited graded composite coatings of Ni–Al–Al₂O₃

Effect of Nickel-Niobium Coating on Fatigue Resistance of SAE 1020 Carbon Steel

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Nickel and Chromium Plating

Cited by 141 publications

References 0 publications

Efeito Da Eletrodeposição De Níquel-Nióbio No Comportamento Em Fadiga De Um Aço Sae 1020

Efeito Da Eletrodeposição De Níquel-Nióbio No Comportamento Em Fadiga De Um Aço Sae 1020

Structure of electrodeposited graded composite coatings of Ni–Al–Al2O3

Effect of Nickel-Niobium Coating on Fatigue Resistance of SAE 1020 Carbon Steel

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Product

Resources

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Structure of electrodeposited graded composite coatings of Ni–Al–Al₂O₃