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Coatings
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Advanced Coatings for Alloy Protection and Performance Enhancement
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Advanced Coatings for Alloy Protection and Performance Enhancement

A special issue of Coatings (ISSN 2079-6412).

Deadline for manuscript submissions: 20 July 2026 | Viewed by 3345

Special Issue Editors

Dr. Xiangkui Liu

E-Mail Website
Guest Editor
School of Materials Science & Engineering, Changzhou University, Changzhou 213164, China
Interests: corrosion resistance; thermal barrier coatings surface engineering; additive manufacturing; high-entropy alloys
Dr. Junxiu Chen

E-Mail Website
Guest Editor
School of Materials Science & Engineering, Changzhou University, Changzhou 213164, China
Interests: biomaterials; surface modification; magnesium
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We would like to invite you to submit your research for this Special Issue, ”Advanced Coatings for Alloy Protection and Performance Enhancement”. Advanced coatings play a pivotal role in enhancing the performance and longevity of alloy materials across industries such as aerospace, energy, and manufacturing. As alloys face increasingly demanding operational environments—including high temperatures, corrosion, and mechanical wear—innovative coating technologies are essential to mitigate degradation and extend service life. This Special Issue explores cutting-edge developments in coating design, deposition techniques, and functionalization strategies, with a focus on improving durability, efficiency, and multi-functionality. Contributions highlight novel materials, scalable processes, and mechanistic insights aimed at addressing current challenges and unlocking new applications for coated alloys in next-generation engineering systems.

Dr. Xiangkui Liu
Dr. Junxiu Chen
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 250 words) can be sent to the Editorial Office for assessment.

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. Coatings 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

  • corrosion resistance
  • thermal barrier coatings
  • surface engineering
  • deposition techniques
  • high-temperature alloys

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (3 papers)

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Research

26 pages, 40179 KB  
Article
Electron Beam Remelting for Enhancing Thermally Sprayed Coatings: A Case Study on Self-Fluxing NiCrBSi Powders with Tungsten Carbide
by Piotr Śliwiński, Mateusz Kopyściański, Andrzej N. Wieczorek, Paweł Pogorzelski, Wojciech Szymański and Krzysztof Szymański
Coatings 2026, 16(2), 175; https://doi.org/10.3390/coatings16020175 - 30 Jan 2026
Viewed by 630
Abstract
Thermally sprayed, self-fluxing NiCrBSi-based coatings, subsequently flame-remelted, exhibit notable abrasion and corrosion resistance. While flame remelting facilitates the formation of a homogeneous, pore-free microstructure and promotes adhesion to the substrate, it suffers from low processing efficiency and introduces considerable thermal loads into the [...] Read more.
Thermally sprayed, self-fluxing NiCrBSi-based coatings, subsequently flame-remelted, exhibit notable abrasion and corrosion resistance. While flame remelting facilitates the formation of a homogeneous, pore-free microstructure and promotes adhesion to the substrate, it suffers from low processing efficiency and introduces considerable thermal loads into the material. In contrast, electron beam remelting (EBR) offers enhanced efficiency, reduced heat input, and the potential to achieve metallurgical bonding with the substrate. This study investigates the influence of EBR parameters on the microstructure, hardness, and elemental distribution of NiCrBSi-based coatings. Four powder compositions—with and without tungsten or tungsten carbide (WC) additives—were deposited via thermal spraying and subjected to EBR. The resulting coatings were analyzed using light and scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and Vickers microhardness testing. The optimized EBR process yielded dense, crack- and pore-free coatings with uniform elemental distribution and effective metallurgical bonding. Maximum matrix hardness values up to 881 HV0.1 were achieved, confirming the efficacy of EBR in enhancing the structural and mechanical integrity of thermally sprayed NiCrBSi coatings. It was also found that the addition of different reinforcement phases to the NiCrBSi matrix can significantly affect the overall microstructure and properties of the matrix itself. Full article
(This article belongs to the Special Issue Advanced Coatings for Alloy Protection and Performance Enhancement)
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17 pages, 4787 KB  
Article
Electrodeposition of Copper-Based Nickel–Graphene Coatings: Effect of Current Density on Microstructure and Properties
by Zhongke Zhang, Haonan Wang, Wenhao Ma and Yingbo Ma
Coatings 2025, 15(12), 1360; https://doi.org/10.3390/coatings15121360 - 21 Nov 2025
Viewed by 1441
Abstract
Nickel–graphene (Ni–Gr) coatings were synthesized on brass via electrodeposition to enhance the surface properties. The microstructure was characterized using SEM, XRD, EDS and Raman spectra, whilst microhardness, tribological behaviour, corrosion resistance and thermal conductivity were assessed. The results show that the current density [...] Read more.
Nickel–graphene (Ni–Gr) coatings were synthesized on brass via electrodeposition to enhance the surface properties. The microstructure was characterized using SEM, XRD, EDS and Raman spectra, whilst microhardness, tribological behaviour, corrosion resistance and thermal conductivity were assessed. The results show that the current density during electrodeposition significantly influences the coating properties: at 2 A/dm2, the coating showed a dense structure, refined grains, and broad Ni diffraction peaks, with the graphene nanoplatelet uniformly distributed throughout. Under these conditions, the coating achieved optimal comprehensive properties: a Vickers hardness of 284 HV, the lowest average coefficient of friction (0.43) and minimal mass loss rate (2.01%) in friction and wear testing, and the highest corrosion resistance and the lowest self-corrosion current density (1.8135 × 10−6 A/cm2), with the thermal conductivity reaching its peak value (154 W/m·K, 25 °C). When the current density deviates from 2 A/dm2, nickel grain coarsening occurs, and the graphene nanoplatelet dispersion deteriorates, leading to reduced hardness, corrosion resistance, and thermal conductivity, whereas friction and wear intensify. Thus, 2 A/dm2 represents the optimum current density for electrodepositing copper-based Ni–Gr coatings, simultaneously optimizing the microstructure, mechanical properties, tribological performance, corrosion resistance and thermal conductivity. This study employs electrodeposition technology to provide a practical strategy for developing high-performance nickel-based coatings for copper-based heat sinks. Full article
(This article belongs to the Special Issue Advanced Coatings for Alloy Protection and Performance Enhancement)
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16 pages, 4377 KB  
Article
Effect of Hydroxyapatite Post-Treatment on the Corrosion Resistance, Cytocompatibility and Antibacterial Properties of Copper-Containing Micro Arc Oxidation Coatings on Mg Alloy as Oral GBR Membrane Application
by Tingting Ma, Qiang Chen, Qian Zhang, Yu Xu, Sharafadeen Kunle Kolawole, Muhammad Ali Siddiqui, Honghui Cheng and Junxiu Chen
Coatings 2025, 15(11), 1344; https://doi.org/10.3390/coatings15111344 - 19 Nov 2025
Viewed by 761
Abstract
Biodegradable magnesium (Mg) alloys hold promising application prospects in the field of guided bone regeneration (GBR) membranes, particularly for oral and maxillofacial applications. However, their corrosion resistance requires further improvement. Additionally, Mg alloys are susceptible to bacterial infection upon implantation, while copper (Cu) [...] Read more.
Biodegradable magnesium (Mg) alloys hold promising application prospects in the field of guided bone regeneration (GBR) membranes, particularly for oral and maxillofacial applications. However, their corrosion resistance requires further improvement. Additionally, Mg alloys are susceptible to bacterial infection upon implantation, while copper (Cu) is known for its excellent antibacterial properties. Introducing Cu into the micro-arc oxidation (MAO) coating can enhance both the corrosion resistance and antibacterial performance of Mg alloys. However, the sealing effect of such coatings remains suboptimal. Hydroxyapatite (HA), which possesses outstanding bioactivity, is a promising bone substitute material. This study investigates the influence of HA content on the microstructure, corrosion resistance, cytotoxicity, and antibacterial properties of Cu-containing MAO coatings. The results demonstrate that as the HA concentration increases, the corrosion resistance of the composite coating is significantly enhanced. The corrosion rate decreased from 0.32 mm/y for the untreated MAO coating to 0.27 mm/y and 0.23 mm/y for the HA-treated samples with EDTA–Ca concentrations of 125 mmol/L and 175 mmol/L, respectively. Cytotoxicity assessment indicates that the incorporation of an HA layer significantly improves cell compatibility compared to the bare MAO coating. However, the enhanced corrosion resistance provided by the denser HA layer (at 175 mmol/L EDTA–Ca) unfortunately acts as a barrier, limiting the release of antibacterial Cu2+. Among the coatings tested, the one with 125 mmol/L EDTA–Ca exhibited the best overall performance, demonstrating good corrosion resistance, cytocompatibility, and effective antibacterial properties. Full article
(This article belongs to the Special Issue Advanced Coatings for Alloy Protection and Performance Enhancement)
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