4.6 Article

Comparative Investigation on Corrosion Resistance of Stainless Steels Coated with Titanium Nitride, Nitrogen Titanium Carbide and Titanium-Diamond-like Carbon Films

Journal

COATINGS
Volume 11, Issue 12, Pages -

Publisher

MDPI
DOI: 10.3390/coatings11121543

Keywords

dental brace; anticorrosive coating; electrochemical test; titanium-diamond-like carbon film; titanium carbide cluster

Funding

  1. National Nature Science Foundation of China [52164042, 51804271]
  2. Natural Science Foundation of Hunan Province, China [2019JJ80055]
  3. Guangxi Natural Science Foundation [2018GXNSFAA281237]
  4. Scientific Research Foundation of Hunan Provincial Education Department [19B550]

Ask authors/readers for more resources

The study compared the corrosion resistance of TiN, TiCN, and Ti-DLC films on 316L stainless steel. TiCN and Ti-DLC films showed significantly improved corrosion resistance due to TiC crystals, while TiN had the lowest corrosion resistance. Among them, Ti-DLC film demonstrated the most suitable corrosion protection for 316L SS substrates, especially in electrolytes with high Cl- and H+ concentrations.
In this study, the corrosion resistance of titanium nitride (TiN), nitrogen titanium carbide (TiCN) and titanium-diamond-like carbon (Ti-DLC) films deposited on 316L stainless steel (SS) were compared via differences in the surface and section-cross morphologies, open circuit potential tests, electrochemical impedance spectroscopy and potentiometric tests. The corrosion resistance of the TiCN and Ti-DLC films significantly improved because of the titanium carbide (TiC) crystals that obstruct the corrosive species penetrating the as-deposited film in the electrolyte atmosphere. TiN exhibited the lowest corrosion resistance because of its low thickness and high volume of defects. The Ti-DLC film showed the lowest corrosion current density (approximately 4.577 mu A/cm(2)) and thickness reduction (approximately 0.12 mu m) in different electrolytes, particularly those with high Cl- and H+ concentrations, proving to be the most suitable corrosion protection material for 316L SS substrates.

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