Planned intervention: On Wednesday April 3rd 05:30 UTC Zenodo will be unavailable for up to 2-10 minutes to perform a storage cluster upgrade.
Published March 31, 2020 | Version v1
Journal article Open

Electrodeposition of Fe–W Alloys from Citrate Bath: Impact of Anode Material

  • 1. Institute of Applied Physics
  • 2. Shevchenko Pridnestrovie State University
  • 3. Lithuanian Energy Institute
  • 4. Institute of Applied Physics/Shevchenko Pridnestrovie State University

Description

The effect of the anode material on the rate of electrodeposition of Fe-W alloy coatings from a citrate bath is studied. Both Fe and Ni soluble anodes and Pt and graphite insoluble anodes are addressed. The effects associated with the anode material are attributed to anodic oxidation of an Fe(II)-citrate complex involved in electrodeposition. In addition to its likely oxidation at the anode, this complex catalyzes reduction of W-containing species and acts as precursor to Fe deposition; these processes unfold via the formation of corresponding intermediates, their surface coverage determining the alloy composition. X-ray photoelectron spectroscopy characterization of deposited alloys indicates that the intermediate FeOHads is oxidized by water to form surface oxides. This process can explain the previously reported macroscopic size effect, i.e., the effect of the volume current density on the microhardness of deposited alloys. By using a soluble iron anode, we achieve an unprecedentedly high rate of alloy de position (25 μm/h at a current density of 20 mA/cm2).

Notes

This is a post-peer-review version of an article published in Surface Engineering and Applied Electrochemistry. The final authenticated version is available online at: DOI: 10.3103/S1068375520010020

Files

Belevschii _2020.pdf

Files (1.1 MB)

Name Size Download all
md5:3acbd550761a3ad98f215c02bb6c9df9
1.1 MB Preview Download

Additional details

Funding

SMARTELECTRODES – Multiscaled Smart Metallic and Semiconductor Electrodes for Electrochemical Processing and Devices 778357
European Commission