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Metals
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Mechanical Properties and Corrosion Behavior of Metals after Surface Modification
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Mechanical Properties and Corrosion Behavior of Metals after Surface Modification

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Corrosion and Protection".

Deadline for manuscript submissions: 30 November 2024 | Viewed by 2593

Special Issue Editors

Dr. Chengxi Wang

E-Mail Website
Guest Editor
Faculty of Transportation Engineering, Kunming University of Science and Technology, 650093, Kunming, China
Interests: shot peening; residual stress; XRD analysis; microstructure characterization; coatings
Special Issues, Collections and Topics in MDPI journals
Dr. Zhou Wang

E-Mail Website
Guest Editor
School of Automotive Engineering, Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan 430070, China
Interests: shot peening; materials processing; mechanical behavior of materials; surface properties; finite element analysis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

It is known that the surface is the first layer of defense. Enhancing the surface properties and performance is definitely a cost-effective way to extend the durability and thus the whole lifespan of critical parts and elements. Shot peening, laser shock peening, deep rolling, laser cladding, laser surface melting, ultrasonic peening, additive manufacturing, SMAT, SMGT, and various coating technologies are widely used to modify the surface properties. Just as every coin has two sides, each surface treating technique has its own drawbacks, and it should be selected and formulated correctly to meet the specific requirements.

Based on these considerations, this Special Issue aims to present the recent research advancements regarding mechanical properties and corrosion behaviors of metals after surface modification. The main focus includes, but is not limited to, the effects to strength, corrosion, fatigue, and wear properties of metallic materials. We hope to increase our understanding and thus manipulate surface technology to improve reliability and durability.

Dr. Chengxi Wang
Dr. Zhou Wang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Metals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • surface modification
  • surface enhancement
  • coating
  • severe plastic deformation
  • additive manufacturing
  • corrosion
  • fatigue
  • wear
  • strength

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Published Papers (3 papers)

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Research

13 pages, 2272 KiB  
Article
Surface Engineering of Ti6Al4V: Impact of Rhenium–Carbon Coatings with Molybdenum Anchors on Biocompatibility and Corrosion Behavior
by Giovany Orozco-Hernández, Sara V. Mosquera-Diaz, Juliana V. Ramírez-Monroy, Willian Aperador, Adriana P. Corredor-Figueroa and Yaneth Pineda-Triana
Metals 2024, 14(10), 1144; https://doi.org/10.3390/met14101144 - 8 Oct 2024
Viewed by 713
Abstract
Titanium alloys, particularly Ti6Al4V, are widely used in biomedical applications due to their excellent mechanical properties and inherent biocompatibility. However, enhancing their surface characteristics, such as biocompatibility and corrosion resistance, remains a key challenge for their long-term use in medical implants. In this [...] Read more.
Titanium alloys, particularly Ti6Al4V, are widely used in biomedical applications due to their excellent mechanical properties and inherent biocompatibility. However, enhancing their surface characteristics, such as biocompatibility and corrosion resistance, remains a key challenge for their long-term use in medical implants. In this study, we investigate the effects of rhenium–carbon coatings deposited on Ti6Al4V substrates via magnetron sputtering, incorporating a molybdenum anchoring layer. X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS) analyses confirmed the formation of rhenium carbides, elemental rhenium, and rhenium oxides within the coatings. Despite these successful depositions, scanning electron microscopy (SEM) revealed significant delamination and poor adhesion of the coatings to the Ti6Al4V substrates. Corrosion resistance, evaluated through potentiodynamic polarization tests, showed an increase in corrosion current densities and more negative corrosion potentials, indicating a detrimental effect on the substrate’s corrosion resistance. Biocompatibility assessments using PK15 cells demonstrated a marked decrease in cell viability and metabolic activity, particularly in samples with higher surface roughness. These findings underscore the critical need for the optimization of surface preparation and deposition processes to improve both the adhesion and biocompatibility of rhenium–carbon coatings on Ti6Al4V substrates. Future research should aim to refine coating technique to enhance adhesion, explore the mechanisms of cytotoxicity related to surface roughness, and expand biocompatibility studies across different cell lines and biological environments. Full article
(This article belongs to the Special Issue Mechanical Properties and Corrosion Behavior of Metals after Surface Modification)
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23 pages, 17525 KiB  
Article
The Preparation and Properties of a Ni-SiO2 Superamphiphobic Coating Obtained by Electrodeposition
by Jianguo Liu, Songlin Tong, Shuaihua Wang, Zhiyao Wan, Xiao Xing and Gan Cui
Metals 2024, 14(9), 1047; https://doi.org/10.3390/met14091047 - 14 Sep 2024
Viewed by 566
Abstract
Superamphiphobic coatings have shown great potential in many fields such as with their anti-corrosion, high-temperature resistance, self-cleaning, and drag reduction properties. However, due to the poor stability of their coatings, it is difficult to apply them on a large scale. In this paper, [...] Read more.
Superamphiphobic coatings have shown great potential in many fields such as with their anti-corrosion, high-temperature resistance, self-cleaning, and drag reduction properties. However, due to the poor stability of their coatings, it is difficult to apply them on a large scale. In this paper, two kinds of SiO2 particles and nickel were co-deposited on the surface of steel to construct a micro/nano dual-scale structure by composite electrodeposition. The surface of the coating was then fluorinated with the low-surface-energy material 1H,1H,2H,2H-Perfluorodecyltriethoxysilane (AC-FAS) to prepare a Ni-SiO2 superamphiphobic coating. The coating has a water contact angle of 159° and an oil contact angle of 151°. The effect of nanoparticle concentration on the wettability and surface morphology of the coating was systematically studied. Comparative experiments revealed that the optimal micro/nanoparticle concentrations were 8 g/L of 20 nm SiO2 and 2 g/L of 1 μm SiO2. This preparation method greatly improves the corrosion resistance, wear resistance, chemical stability, and high-temperature resistance of the coating. Full article
(This article belongs to the Special Issue Mechanical Properties and Corrosion Behavior of Metals after Surface Modification)
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11 pages, 6172 KiB  
Article
Influence of Grain Size and Film Formation Potential on the Diffusivity of Point Defects in the Passive Film of Pure Aluminum in NaCl Solution
by Xiuhua Hu, Kunyuan Gao, Xiangyuan Xiong, Hui Huang, Xiaolan Wu, Shengping Wen, Wu Wei, Zuoren Nie and Dejing Zhou
Metals 2024, 14(7), 782; https://doi.org/10.3390/met14070782 - 3 Jul 2024
Viewed by 830
Abstract
The influence of grain size on the corrosion behavior of pure aluminum and the defect density and diffusion coefficient of surface passive films were investigated using electron backscatter diffraction (EBSD) and electrochemical testing techniques, based on the point defect model (PDM). Samples with [...] Read more.
The influence of grain size on the corrosion behavior of pure aluminum and the defect density and diffusion coefficient of surface passive films were investigated using electron backscatter diffraction (EBSD) and electrochemical testing techniques, based on the point defect model (PDM). Samples with three different grain sizes (23 ± 11, 134 ± 52, and 462 ± 203 μm) were obtained by annealing at different temperatures and times. The polarization curves and electrochemical impedance spectroscopy results for the pure aluminum in the 3.5% NaCl solution showed that with decreasing grain size, the corrosion current (icorr) decreased monotonously, giving rise to a noble corrosion potential and a large polarization resistance. The Motte–Schottky results showed that the passive films that formed on pure aluminum with fine grains of 23 ± 11 μm had a low density (3.82 × 1020 cm−3) of point defects, such as oxygen vacancies and/or metal interstitials, and a small diffusion coefficient (1.94 × 10−17 cm2/s). The influence of grain size on corrosion resistance was discussed. This work demonstrated that grain refinement could be an effective approach to achieving high corrosion resistance of passive metals. Full article
(This article belongs to the Special Issue Mechanical Properties and Corrosion Behavior of Metals after Surface Modification)
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