Corrosion Behavior and Surface Engineering of Metallic Materials

A special issue of Metals (ISSN 2075-4701).

Deadline for manuscript submissions: 30 June 2025 | Viewed by 788

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Faculty of Engineering, Universidad Militar Nueva Granada, Bogotá 111111, Colombia
Interests: corrosion; wear; thin films
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Special Issue Information

Dear Colleagues,

Metallic materials are used ubiquitously and, in particular, in engineering due to their versatility, resistance, and recyclability. However, one of the significant challenges faced by metallic materials is corrosion, which can severely impact their performance and longevity. Steel, for example, is primarily used in various applications and environments to withstand extreme conditions, such as heavy loads and high temperatures. Despite their strength, steel and other metals are susceptible to corrosion, especially when exposed to different types of fluids in industrial processes. This exposure can cause oxidation, rapidly reducing the usefulness of the components.

The movement of a corrosive fluid against a metallic surface, combined with mechanical effects, accelerates the rate of corrosion. If the fluid contains solids and suspended particles, the degradation of the material increases further. This makes corrosion a critical issue, leading to significant economic losses worldwide. To combat this, recent advancements have focused on developing coatings that enhance the properties of metals or maintain their integrity under corrosive conditions. These coatings act as a protective barrier, preventing direct contact between the metal and the corrosive environment. In doing so, they significantly extend the lifespan of metallic components and reduce maintenance costs.

Prof. Dr. Willian Aperador
Guest Editor

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Keywords

  • metals
  • corrosion
  • hard coatings
  • physical vapor deposition
  • tribometers
  • fretting corrosion
  • potentiodynamic polarization

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Published Papers (1 paper)

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Research

14 pages, 8263 KiB  
Article
Microstructural, Electrochemical, Mechanical, and Biocompatibility Characterization of ReN Thin Films Synthesized by DC Sputtering on Ti6Al4V Substrates
by Willian Aperador, Giovany Orozco-Hernández, Jonnathan Aperador and Jorge Bautista-Ruiz
Metals 2025, 15(3), 272; https://doi.org/10.3390/met15030272 - 1 Mar 2025
Viewed by 599
Abstract
Thin films of ReN were synthesized by DC sputtering at different nitrogen pressures (120, 140, 160, and 180 mTorr) on silicon and Ti6Al4V substrates. The coatings were evaluated for their microstructural and mechanical properties. Additionally, the biocompatibility and electrochemical properties of the films [...] Read more.
Thin films of ReN were synthesized by DC sputtering at different nitrogen pressures (120, 140, 160, and 180 mTorr) on silicon and Ti6Al4V substrates. The coatings were evaluated for their microstructural and mechanical properties. Additionally, the biocompatibility and electrochemical properties of the films were studied using Hanks’ lactate solution at 37 °C. X-ray diffraction (XRD) confirmed the formation of cubic ReN with higher nitrogen content. The optimized nitrogen pressure (180 mTorr) allowed the complete formation of the cubic phase of ReN. Regarding electrochemical behavior, ReN coatings significantly improve corrosion resistance, reducing the corrosion rate as nitrogen content increases, reaching 0.0145 µm/year at 180 mTorr. Regarding mechanical properties, the deposited ReN films presented an optimal combination of hardness and elastic modulus for the highest nitrogen contents. Cell viability was assessed by comparing uncoated and coated samples using a live/dead staining assay, demonstrating the biocompatibility of the coatings. To complement this study, scanning electron microscopy (SEM) was used to analyze the protein–coating interaction and cell morphology on the surface of the samples. Full article
(This article belongs to the Special Issue Corrosion Behavior and Surface Engineering of Metallic Materials)
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