Characterisation of electrodeposited Co–W–P amorphous coatings on carbon steel

Yun, Hongseok; Dulal, S.M.S.I.; Shin, Chee Burm; Kim, Chang‐Koo

doi:10.1016/j.electacta.2008.07.068

Cited by 15 publications

(2 citation statements)

References 34 publications

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“…The peaks at 40.93 and 52.55° correspond to Co 2 P phase (JCPDS 32−306), whereas the peaks at 44.29, 47.11, 76.05 and 92.2° are associated with hcp-Co. 9 Appearance of Co 2 P phase in heat treated Co−P coatings at low P concentrations in this study is supported by the preceding reports on such types of coatings. 20,21 However, heat treatment of the coatings at lower temperature also shows the XRD patterns similar to 400 °C.…”

Section: Xrd Studiesmentioning

confidence: 94%

CHARACTERIZATION AND HARDNESS OFCo–PCOATINGS OBTAINED FROM DIRECT CURRENT ELECTRODEPOSITION USING GLUCONATE BATH

et al. 2013

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Direct current electrodeposition of Co – P alloy coatings were carried out using gluconate bath and they were characterized by employing techniques like XRD, FESEM, DSC and XPS. Broad XRD lines demonstrate the amorphous nature of Co – P coatings. Spherical and rough nodules are observed on the surface of coatings as seen from FESEM images. Three exothermic peaks around 290, 342 and 390°C in DSC profiles of Co – P coatings could be attributed to the crystallization and formation of Co 2 P phase in the coatings. As-deposited coatings consist of Co metal and oxidized Co species as revealed by XPS studies. Bulk alloy P ( P δ-) as well as oxidized P ( P 5+) are present on the surface of coatings. Concentrations of Co metal and P δ- increase with successive sputtering of the coating. Observed microhardness value is 1005 HK when Co – P coating obtained from 10 g L-1 NaH 2 PO 2 is heated at 400°C that is comparable with hard chromium coatings.

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Section: Xrd Studiesmentioning

confidence: 94%

CHARACTERIZATION AND HARDNESS OFCo–PCOATINGS OBTAINED FROM DIRECT CURRENT ELECTRODEPOSITION USING GLUCONATE BATH

et al. 2013

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“…It should be pointed out that the well-known theories in the case of electrochemical nucleation and growth have been developed for single metal and/or single phase electrodeposition, such as Scharifker et al [45,46] and Heerman-Tarallo [47,48] models. However, a literature survey shows that in many cases these models have been successfully utilized not only for binary alloy [1,6,16,[49][50][51][52][53][54][55][56][57][58][59][60][61] but also for ternary alloy electrodeposition [62][63][64]. The well-known model of Scharifker and Hills [45] has been used for many multicomponent electrodeposition systems such as Fe-Ni [1,59], Fe-Co [50,60], Fe-Zn [61], Pd-Rh-Ru [62] and Fe-Pd [6].…”

Section: Effect Of Substrate On Nucleation and Growthmentioning

confidence: 99%

Electrochemical Behavior of Nanostructured Fe-Pd Alloy During Electrodeposition on Different Substrates

Rezaei

Haghshenas

Ghorbani

et al. 2018

J. Electrochem. Sci. Technol

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In this work, Fe-Pd alloy films have been electrodeposited on different substrates using an electrolyte containing [Pd(NH 3) 4 ] 2 + (0.02 M) and [Fe-Citrate] 2 + (0.2 M). The influences of substrate and overpotential on chemical composition, nucleation and growth kinetics as well as the electrodeposited films morphology have been investigated using energy dispersive X-ray spectroscopy (EDS), current-time transients, scanning electron microscopy (SEM), atomic force microscopy (AFM) and X-ray diffraction (XRD) patterns. In all substrates-brass, copper and sputtered fluorine doped tin oxide on glass (FTO/glass)-Fe content of the electrodeposited alloys increases by increasing the overpotential. Also the cathodic current efficiency is low due to high rate of H 2 co-reduction. Regarding the chronoamperometry current-time transients, it has been demonstrated that the nucleation mechanism is instantaneous with a typical three dimensional (3D) diffusion-controlled growth in the case of brass and copper substrates; while for FTO, the growth mode changes to 3D progressive. At a constant overpotential, the calculated number of active nucleation sites for metallic substrates is much higher than that of FTO/glass; however by increasing the overpotential, the number of active nucleation sites increases. The SEM micrographs as well as the XRD patterns reveal the formation of Fe-Pd alloy thin films with nanostructure arrangement and ultrafine grains.

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Surface Characteristics and High Temperature Oxidation Resistance Performance of Stainless Steel Foam Modified by Pack Aluminizing and Moderate Oxidation

Huo

Zhou

Wang

et al. 2011

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Characterisation of electrodeposited Co–W–P amorphous coatings on carbon steel

Cited by 15 publications

References 34 publications

CHARACTERIZATION AND HARDNESS OFCo–PCOATINGS OBTAINED FROM DIRECT CURRENT ELECTRODEPOSITION USING GLUCONATE BATH

CHARACTERIZATION AND HARDNESS OFCo–PCOATINGS OBTAINED FROM DIRECT CURRENT ELECTRODEPOSITION USING GLUCONATE BATH

Electrochemical Behavior of Nanostructured Fe-Pd Alloy During Electrodeposition on Different Substrates

Surface Characteristics and High Temperature Oxidation Resistance Performance of Stainless Steel Foam Modified by Pack Aluminizing and Moderate Oxidation

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