Chemical composition variation of the Ni–W alloy as a function of parameters used in the electrodeposition process

da Silva, Cicero Romerio Pereira; Costa, Josiane Dantas; de Almeida, Arthur Filgueira; de Santana, Renato Alexandre Costa; Campos, Ana Regina Nascimento; Alves, José Jailson Nicácio; de Abreu Santos, Tiago Felipe

doi:10.1007/s10800-023-01992-y

Cited by 3 publications

(1 citation statement)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to Mishra et al [68], for a perfect capacitor, the α value is equal to 1. However, this value is lower than 1 due to the roughness of the coating or its inhomogeneity; thus, the behavior of a non-ideal capacitor is observed [68][69][70][71][72]. The values of the parameters Rs, Rp, and QPE, obtained from the equivalent electrical circuit, are shown in Table 4.…”

Section: Corrosion Measurementsmentioning

confidence: 99%

Effects of Current Density and Bath Temperature on the Morphological and Anticorrosive Properties of Zn-Ni Alloys

Costa,

Almeida,

Santana

et al. 2023

Metals

View full text Add to dashboard Cite

The effect of current density and bath temperature in the electroplating process on resistance to corrosion of Zn-Ni alloys was evaluated in this work. The electrolytic bath consisted of nickel sulfate, zinc sulfate, sodium sulfate, boric acid, and sodium citrate at pH 7.0. The current density was varied in the range 20–80 mA/cm2 and the bath temperature in the range 30–60 °C. Increasing, independently, the current density or the bath temperature increased the nickel content in the obtained alloy, which affected the alloy microstructure, with a predominant γ phase and cauliflower-like morphology. The nickel content in the alloys was in the range 20–42%wt. A synergistic effect between the current density and bath temperature was observed from a design of experiments and response surface models. The maximum resistance to corrosion occurred for the alloy containing 42%wt. nickel. This alloy was obtained at upper levels of current density and bath temperature, presenting a corrosion potential of −0.789 V and polarization resistance of 4136 Ω.cm2.

show abstract