Preparation and Characterization of Co-Diamond Composite Coatings Obtained in a Single-Step Hybrid Electrophoretic Deposition Process
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2025-03-15 |
| Journal | Materials |
| Authors | Diana UČu, Roxana Muntean, Iasmina-MÄdÄlina Anghel, Iosif Hulka, Ion-DragoČ UČu |
| Institutions | Polytechnic University of TimiÅoara, Victor BabeČ University of Medicine and Pharmacy TimiČoara |
Abstract
Section titled āAbstractāThe electrochemical co-deposition of various hard particles with metals or metal alloys has been recently studied, especially for developing wear-resistant coatings. In the current work, pure cobalt and cobalt-diamond composite coatings were electrochemically deposited onto a low-alloy steel substrate and further investigated in terms of microstructure, corrosion behavior, and tribological characteristics. The electrodeposition process was carried out using direct current, from an additive-free electrolyte containing 300 g Lā1 CoSO4, 50 g Lā1 CoCl2, and 30 g Lā1 H3BO3 with and without diamond particles. Scanning electron microscopy (SEM) combined with energy-dispersive X-ray spectroscopy (EDS) was used for the microstructural characterization correlated with the chemical composition identification of the resulting coatings. The pure Co coatings showed a dense microstructure with a nodular morphology. In contrast, for the Co-diamond composite coatings, more elongated grains were observed containing a uniform distribution of the reinforcing diamond particles. The corrosion resistance was evaluated by potentiostatic polarization measurements in 3.5 wt.% NaCl solution, while the sliding wear resistance was assessed using the ball-on-disk testing method. The experimental results demonstrated that incorporating diamond particles into the cobalt deposition electrolyte positively impacted the tribological performance of the resulting composite coatings without significantly affecting the corrosion properties. Both cobalt and the composite coatings demonstrated substantially superior wear characteristics and corrosion resistance compared to the steel substrate.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
Section titled āReferencesā- 2020 - Global Impact of Corrosion: Occurrence, Cost and Mitigation
- 2022 - Recent Advances in Nanotechnology-Based Functional Coatings for the Built Environment [Crossref]
- 2022 - A Review of the Tribological Behavior of Electrodeposited Cobalt (Co) Based Composite Coatings
- 2015 - Methods of Composite Coating: A Review
- 2013 - Multiscale Modeling of Inclusions and Precipitation Hardening in Metal Matrix Composites: Application to Advanced High-Strength Steels [Crossref]