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Advanced Corrosion and High Temperature Protection through Surface Modification and...
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Advanced Corrosion and High Temperature Protection through Surface Modification and Coatings

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Corrosion, Wear and Erosion".

Deadline for manuscript submissions: closed (30 November 2023) | Viewed by 5810

Special Issue Editors

Dr. Artur Mariano De Sousa Malafaia

E-Mail Website
Guest Editor
Department of Mechanical and Industrial Engineering, Federal University of São João del-Rei, São João del-Rei 36301-352, Brazil
Interests: oxidation of metals at high temperature; corrosion behaviours of biomaterials coatings; surface modifications
Prof. Dr. Renato Baldan

E-Mail Website
Guest Editor
Campus of Itapeva, São Paulo State University (UNESP), Itapeva 18409-010, São Paulo, Brazil
Interests: cyclic and isothermal oxidation of high temperature materials; superalloys; heat-treatment; microstructural characterization; thermodynamic simulation
Dr. Frederico Augusto Pires Fernandes

E-Mail Website
Guest Editor
CECS, Universidade Federal do ABC, São Bernardo do Campo 09606-070, Brazil
Interests: metallic materials; biomaterials; surface engineering; protection of metals and alloys against corrosion and wear

Special Issue Information

Dear Colleagues,

Coatings and surface modifications enable the improved performance of materials in applications where the surface is exposed to atmospheres that promote damage. Thus, materials applied in environments that are prone to suffering wet corrosion or high temperature oxidation (dry corrosion) phenomena often see their surfaces modified in order to achieve improved performance. Due to this, research on new methods to coat materials is always relevant.

This Special Issue is not limited to but intends to receive papers related to coating methods with mechanisms that act to promote improved behaviour at corrosion or high temperature oxidation:

  • Biomaterials: the field related to complex environments uses materials which are submitted to (bio)corrosion and wear. In these conditions, different surface modification methods are applied to confer corrosion protection and biocompatibility.
  • Aeronautics/Aerospace: the study of thermal barrier coatings is a field that presents interesting perspectives with high entropy coating (alloys) and additive manufacturing.
  • Oil and gas: bio-inspired coatings, self-healing, polymeric and composite-based coatings have all been recently employed to avoid corrosion in the petroleum extraction; the acting mechanisms are still under investigation.
  • Modelling/experimental papers that address the potential of computational tools in this field are also welcome.

Dr. Artur Mariano De Sousa Malafaia
Prof. Dr. Renato Baldan
Dr. Frederico Augusto Pires Fernandes
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. 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

  • coating mechanisms
  • surface modification
  • corrosion
  • oxidation at high temperature
  • performance at applications

Published Papers (5 papers)

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Editorial

Jump to: Research

5 pages, 218 KiB  
Editorial
Advanced Corrosion and High-Temperature Protection through Surface Modification and Coatings
by Frederico Augusto Pires Fernandes, Renato Baldan and Artur Mariano de Sousa Malafaia
Coatings 2023, 13(11), 1940; https://doi.org/10.3390/coatings13111940 - 14 Nov 2023
Viewed by 763
Abstract
Coatings and surface modifications have long been applied in a broad variety of areas including petrochemical, automotive, power generation, aerospace and even in the medical industry [...] Full article
(This article belongs to the Special Issue Advanced Corrosion and High Temperature Protection through Surface Modification and Coatings)

Research

Jump to: Editorial

17 pages, 5542 KiB  
Article
Research on Arc Erosion Resistance of High-Entropy Alloy-Modified Aluminum Alloy Armature Based on Molecular Dynamics Simulation
by Yuanxin Teng, Li Zhang, Guan Wang, Meiying Wu, Chenlu Fan and Shushuai Liu
Coatings 2024, 14(2), 187; https://doi.org/10.3390/coatings14020187 - 31 Jan 2024
Viewed by 662
Abstract
In an electromagnetic launch system, the surface of the aluminum alloy armature is subjected to high-temperature ablation, leading to the generation of significant metal vapor and the initiation of high-energy arcs. This damages the armature structure and can result in a launch failure. [...] Read more.
In an electromagnetic launch system, the surface of the aluminum alloy armature is subjected to high-temperature ablation, leading to the generation of significant metal vapor and the initiation of high-energy arcs. This damages the armature structure and can result in a launch failure. Enhancing the ablation resistance of the armature surface is crucial for improving launch efficiency. In this study, a model for the surface modification of an aluminum alloy armature was constructed. The impact of the CoCrNiFeAlx surface-modified material on the resistance to ablation and structural changes of the armature during arc ablation was elucidated through molecular dynamics simulation. Results show that adding a CoCrNiFeAlx fused cladding layer can effectively enhance the material’s high-temperature resistance. The CoCrNiFeAlx fused cladding significantly reduces the depth of arc intrusion. The CoCrNiFeAlx aluminum alloy model exhibits a narrower strain range on the bombarded surface and a more flattened bombardment crater shape. CoCrNiFeAlx fused cladding helps to reduce damage from substrate bombardment. Comparing simulation results indicates that CoCrNiFeAl0.25 performs best in high-temperature resistance and impact strength, making it the most preferred choice. This study elucidates the law of high-entropy alloy arc ablation resistance and its micromechanism in armature surface modification. It provides a theoretical basis and technical support for preparing high-entropy alloy–aluminum alloy-modified armatures with superior ablation resistance performance. Full article
(This article belongs to the Special Issue Advanced Corrosion and High Temperature Protection through Surface Modification and Coatings)
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15 pages, 11397 KiB  
Article
Experimental Investigation of the Initial Stage of the Oxidation Mechanism of Co Coating for Solid Oxide Fuel Cell Interconnects at 650 °C
by Jingwen Mao, Enhua Wang, Hewu Wang, Minggao Ouyang, Haoran Hu, Languang Lu, Dongsheng Ren and Yadi Liu
Coatings 2023, 13(7), 1144; https://doi.org/10.3390/coatings13071144 - 24 Jun 2023
Cited by 2 | Viewed by 856
Abstract
The evolution of Co coating in solid oxide fuel cells (SOFCs) under low and medium temperatures (<700 °C) is different from that under high temperatures. In this context, the oxidation corrosion of 441 ferritic stainless steel (FSS) with a Co coating in air [...] Read more.
The evolution of Co coating in solid oxide fuel cells (SOFCs) under low and medium temperatures (<700 °C) is different from that under high temperatures. In this context, the oxidation corrosion of 441 ferritic stainless steel (FSS) with a Co coating in air under 650 °C was investigated. The results indicated that the Co coating was oxidized rapidly and a Co3O4 spinel layer formed in the initial exposure of 5 min, which improved the oxidation resistance of 441 steel. After oxidation at 650 °C for 120 h, a Cr2O3 layer with a thickness of 0.2–0.4 μm was observed on the surface of bare 441 steel, while the surface oxide scale of Co-coated 441 steel samples was composed of an inner Cr2O3 and Fe2O3 solid solution (0.1–0.3 μm thick), an intermediate (Fe, Co)3O4 layer and an outer Co3O4 spinel layer, respectively. The Co-coated 441 steel sample exhibited better electrical properties. After oxidation at 650 °C for 120 h, the area-specific resistance (ASR) of the Co-coated steel was 3.73 mΩ·cm2, which was 25.4% lower than that of bare 441 steel as 5 mΩ·cm2. Furthermore, the thermal growth process and protection mechanism of Co coating at 650 °C were discussed. Full article
(This article belongs to the Special Issue Advanced Corrosion and High Temperature Protection through Surface Modification and Coatings)
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16 pages, 4769 KiB  
Article
Tribological Properties and Corrosion Resistance of Stellite 20 Alloy Coating Prepared by HVOF and HVAF
by Zhiqiang Zhou, Jiahui Yong, Jiaoshan Hao, Deen Sun, Qian Cheng, Huan Jing and Zhongyun Zhou
Coatings 2023, 13(4), 806; https://doi.org/10.3390/coatings13040806 - 21 Apr 2023
Cited by 1 | Viewed by 1577
Abstract
This study examines the tribological and corrosion properties of Stellite 20 alloy coatings on F310H heat-resistant stainless steel that were prepared using HVOF and HVAF supersonic flame spraying techniques. To investigate the coatings’ microstructure, phase, microhardness, wear, and corrosion resistance, a range of [...] Read more.
This study examines the tribological and corrosion properties of Stellite 20 alloy coatings on F310H heat-resistant stainless steel that were prepared using HVOF and HVAF supersonic flame spraying techniques. To investigate the coatings’ microstructure, phase, microhardness, wear, and corrosion resistance, a range of characterization techniques, including SEM, EDS, XRD, microhardness, and friction wear-testers, weas employed. The results indicate that both HVOF and HVAF-prepared coatings exhibit a dense structure with porosity of 0.41% and 0.32%, respectively. The coatings are composed of γ-Co solid solution, ε-Co solid solution, Cr-rich solid solution, Cr7C3, WC, and CoCr2O4 phases. The microhardness of the Stellite 20 coatings prepared by HVOF and HVAF methods was 610 HV0.3 and 690 HV0.3, respectively, which is three times higher than that of the F310H stainless steel substrate. The wear mechanism of the HVAF coating is abrasive wear, while the wear mechanism of the HVOF coating is mainly fatigue wear with slight abrasive wear. The HVAF coating demonstrates superior wear resistance due to its higher flame velocity, denser coating, and higher average microhardness. In contrast, the HVOF coating shows a higher friction coefficient stability due to its lower hardness dispersion. The corrosion potentials of the HVOF and HVAF coatings are −0.532 V and −0.376 V, respectively, with corresponding corrosion current densities of 1.692 × 10−7 A·cm−2 and 6.268 × 10−7 A·cm−2, respectively. Compared to the HVOF coating, the Stellite 20 coating prepared using HVAF technology exhibits better wear and corrosion resistance. Full article
(This article belongs to the Special Issue Advanced Corrosion and High Temperature Protection through Surface Modification and Coatings)
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13 pages, 7000 KiB  
Article
Cyclic Oxidation Behavior of Conventional and Niobium-Modified MAR-M246 Superalloy at 900 and 1000 °C
by Filipe Augusto de Faria Cunha, Rodrigo de Andrade Reis, Samantha Pinto Gonçalves, Frederico Augusto Pires Fernandes, Renato Baldan and Artur Mariano de Sousa Malafaia
Coatings 2023, 13(3), 519; https://doi.org/10.3390/coatings13030519 - 25 Feb 2023
Cited by 2 | Viewed by 1328
Abstract
Nickel-based superalloys have excellent properties at high temperatures, which makes them appropriate for applications such as turbocharges and aeronautic gas turbines. MAR-M246 is a superalloy developed for these kinds of applications. The objective of this work was to study the total replacement of [...] Read more.
Nickel-based superalloys have excellent properties at high temperatures, which makes them appropriate for applications such as turbocharges and aeronautic gas turbines. MAR-M246 is a superalloy developed for these kinds of applications. The objective of this work was to study the total replacement of Ta by Nb in atomic percentage for this superalloy, regarding the oxidation resistance. Although both elements have the same role (form the γ’ precipitates) in nickel-based superalloys, Ta is more expensive than Nb. Thus, this replacement leads to the possibility of a price reduction. This work studied both conventional MAR-M246(Ta) and experimental MAR-M246(Nb) on cyclic oxidation tests at 900 and 1000 °C for up to 180 cycles. The oxide products were characterized by SEM/EDS and XRD analysis. The products of oxidation were mainly TiO2, Al2O3, Cr2O3, NiO, and Ni(Co)Cr2O4. Mass gain variation per unit area was stable for both materials and temperatures. However, spalled areas were detected for tests performed at 1000 °C. The results obtained here suggest that use of Nb instead of Ta can be considered regarding high temperature oxidation for MAR-M246 superalloy. Full article
(This article belongs to the Special Issue Advanced Corrosion and High Temperature Protection through Surface Modification and Coatings)
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