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Preparation of Binary and Ternary Deep Eutectic Systems
Published on: October 31, 2019
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Deposition of Zinc⁻Cerium Coatings from Deep Eutectic Ionic Liquids
Miguel Marín-Sánchez1, Elena Gracia-Escosa2, Ana Conde3
1Department of Surface Engineering, Corrosion and Durability, National Center for Metallurgical Research CENIM-CSIC, Av. Gregorio del Amo 8, 28040 Madrid, Spain. mgl.marin.sanchez@gmail.com.
Materials (Basel, Switzerland)
|October 24, 2018
Summary
Electrodeposited zinc-cerium coatings on carbon steel offer potential anti-corrosion properties. Cerium migration in Zn-Ce coatings aids sacrificial protection, though further research is needed for enhanced performance.
Area of Science:
- Materials Science
- Electrochemistry
- Corrosion Engineering
Background:
- Carbon steel is susceptible to corrosion, necessitating protective coatings.
- Ionic liquids offer novel electrolytes for electrodeposition.
- Developing coatings with self-repairing and sacrificial properties is crucial for enhanced durability.
Purpose of the Study:
- To electrodeposit zinc-cerium (Zn-Ce) coatings on carbon steel using a choline chloride-based ionic liquid.
- To investigate the influence of current density on coating composition and morphology.
- To evaluate the anti-corrosion, sacrificial, and self-repairing properties of the Zn-Ce coatings.
Main Methods:
- Electrodeposition using a choline chloride-urea deep eutectic solvent.
- Hull cell tests to optimize current density.
- Surface characterization using SEM, EDX, and XPS.
- Electrochemical corrosion tests and scratched tests.
Main Results:
- Successful cathodic deposition of Zn-Ce coatings achieved for the first time in this electrolyte.
- Cerium incorporated as oxide or mixed oxide within the zinc matrix.
- Coating composition and morphology varied with current density.
- Similar corrosion rates observed for all coatings, but cerium oxide migration noted in scratched tests.
Conclusions:
- Zn-Ce coatings show potential for sacrificial protection due to cerium migration.
- Current density significantly impacts coating characteristics.
- Further optimization is required to improve the overall corrosion protection efficacy for carbon steel applications.
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