Electrochemical behaviour of Ni-Co amorphous alloys in alkaline solutions

Barbosa, M. R.; Gassa, Liliana Mabel; Ruiz, Edgar J.

doi:10.1007/s100080000189

Cited by 4 publications

(2 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The electrochemical behaviour of Ni-Co amorphous alloys G15 (Ni 58 Co 20 B 12 Si 10 ) and G16 (Ni 25 Co 50 B 10 Si 15 ) in carbonate-bicarbonate buffers of pH 8.9 to 10.5 were studied by Barbosa et al [74] using voltammetry and stationary polarization techniques combined with electrochemical impedance spectroscopy and X-ray photoelectron spectroscopy (XPS). The results indicated that the electrochemical processes were dependent on the applied potential, the alloy composition, the pH value, and ionic strength of the electrolyte.…”

Section: Mechanism Of Co-depositionmentioning

confidence: 99%

Recent developments in the electrodeposition of nickel and some nickel-based alloys

Oriňáková¹,

Turoňová²,

Kladeková³

et al. 2006

J Appl Electrochem

214

View full text Add to dashboard Cite

The numerous theoretical and practical studies of the electrodeposition of nickel and its binary and selected ternary alloys with copper and cobalt over the last 10-15 years are reviewed. The reported mechanisms of the electrodeposition processes and accompanying evolution of hydrogen are considered. The complex influence of different bath compositions, pHs, current densities or potential ranges and temperature on the formation of single or multiple deposition layers are compared. The determination of the structure and morphology of the deposits on different substrates, including solid surfaces and particulate materials, using a range of analytical techniques are reported.

show abstract

Section: Mechanism Of Co-depositionmentioning

confidence: 99%

Recent developments in the electrodeposition of nickel and some nickel-based alloys

Oriňáková¹,

Turoňová²,

Kladeková³

et al. 2006

J Appl Electrochem

214

View full text Add to dashboard Cite

show abstract

“…Molybdenum is a good candidate to be added to CoNi alloys as it is a highly corrosion resistant metal and also bears high mechanical strength. Although electrochemical impedance spectroscopy (EIS) is a powerful technique for corrosion studies, most of the studies with Co-based films employ the linear potential sweep method and very few studies were already reported (1,2). Barbosa and coworkers (1) studied the dissolution of CoNi-based amorphous alloys in alkaline carbonate-bicarbonate solutions using impedance and XPS techniques.…”

Section: Introductionmentioning

confidence: 99%

EIS Corrosion Study of Co, Ni, CoNi, and CoNiMo Electrodeposited Thin Films

Esteves

Sumodjo

2006

ECS Trans.

View full text Add to dashboard Cite

Co, Ni, Co78Ni22 and Co75Ni22Mo3 magnetic thin films (5 micron) were electrodeposited galvanostatically from chloride baths containing sodium citrate as additive. These films were kept during 24 hours in a 5 wt. % NaCl solution (pH 6.4). During this period, OCP measurements and EIS were used to tail the corrosion of each film. The films were also analyzed by SEM before and after the corrosion experiments. The OCP of Ni, Co and CoNi decreased during the first seven hours of immersion, whilst for CoNiMo, it increased during the first eight hours due to the presence of a MoO2 layer below the film. In both cases, OCP remained constant thereafter. Different equivalent circuits were adjusted to the EIS data. From these circuits, charge transfer resistance and double layer capacitance of each film could be evaluated.

show abstract