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Advanced Coatings with Noble and Refractory Alloy Metals in Extreme...
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Advanced Coatings with Noble and Refractory Alloy Metals in Extreme Environments

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Surface Characterization, Deposition and Modification".

Deadline for manuscript submissions: closed (1 April 2024) | Viewed by 2005

Special Issue Editor

Dr. Wangping Wu

E-Mail Website
Guest Editor
School of Mechanical Engineering and Rail Transit, Changzhou University, Changzhou 213164, China
Interests: metal/alloy coating and film for corrosion, oxidation, and catalysis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Recent theoretical and experimental developments in noble metal and its alloy coatings, refractory metal coatings, and surface modification technologies are among the most highly exploited research systems in the field of materials science and engineering and engineering mechanical components. They are spurred primarily by durability in demanding the environmental conditions required by current applications ranging from aerospace, medical, and automotive and chemical industries to oil and gas technologies. Driven by the current state of knowledge of high-temperature protection and corrosion prevention mechanisms, the need to maintain structural material integrity and reliability assets under harsh environments and a renewed impetus towards the durability of new nanostructured coating systems have seen a huge demand in experimental, theoretical, and modelling activities.

The manufacture, design, and test of high-performance nanostructured coating materials that are either high in terms of conductivity and corrosion-resistant noble metals (e.g., platinum, gold, silver, etc.) or are capable of serving as physical protection layers with high-temperature and wear-resistant refractory metals (tungsten, molybdenum, etc.), or a combination of these, provides unprecedented functionality and opportunities for multifunctional coatings protecting metallic structures (steels, stainless steels, aluminium, and magnesium, etc.).

This scope of this Special Issue will serve as a forum for papers in the following areas:

  1. Theoretical and experimental research, knowledge, and new ideas in corrosion protective and preventive coatings mechanisms of noble metal and refractory metal coatings.
  2. Recent developments in surface modification and strengthening techniques for multi-functional coatings, involving noble and refractory metals.
  3. A new initiative aims to reduce the amount of noble metal in its alloy coatings and to enhance their performance.
  4. Coatings produced by different processes, including, but not limited to, additive manufacturing processes, thermal spray, laser and plasma processing, CVD, electrodeposition, etc.
  5. Experiment and processing of high-performance coatings with exposure to high temperatures, high stress, and other extreme environment applications.
  6. Understanding the degradation mechanisms of coatings through friction, wear, or other dynamic loading condition and corrosion.
  7. The latest development of test methods considering the interplay between mechanical, chemical, and electrochemical interactions and the ability to predict performance and reliability.
  8. Computer modelling, simulation to predict coating properties, performance, durability, and reliability in service environments.

Dr. Wangping Wu
Guest Editor

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

  • protective coatings
  • extreme environments
  • noble metal
  • refractory metal
  • surface reinforcement

Published Papers (2 papers)

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Research

17 pages, 5240 KiB  
Article
Tailoring the Silicon Cementation Applied to P265GH Grade Steel
by Mihai Branzei, Mihai Ovidiu Cojocaru, Mircea Dan Morariu and Leontin Nicolae Druga
Coatings 2024, 14(1), 74; https://doi.org/10.3390/coatings14010074 - 04 Jan 2024
Viewed by 762
Abstract
Increasing the serviceability of industrial components intended for the petrochemical industry is possible through their superficial saturation with silicon (silicon cementation). Obtaining a silicon-rich surface coating results in a considerable increase in corrosion resistance, refractoriness, and wear resistance. One of the most economically [...] Read more.
Increasing the serviceability of industrial components intended for the petrochemical industry is possible through their superficial saturation with silicon (silicon cementation). Obtaining a silicon-rich surface coating results in a considerable increase in corrosion resistance, refractoriness, and wear resistance. One of the most economically convenient options for silicon cementation is pack siliconizing in powdery solid media. This paper presents the possibility of pack siliconizing that contains ferrosilicon (FeSi75C) and a thermite mixture (SiO2 + Al) as active, silicon-providing components, in P265GH grade steel, which is frequently used in the petrochemical industry. The aim of the study was to determine the most suitable active component of the two that were analyzed and at the same time identify the processing conditions in which the siliconized coating has the greatest thickness, is free of porosity, and is in direct contact with the support. The use of experimental programming methods allowed the optimization of the operation to obtain the optimal solution. It was concluded that the thermite mixture is not compatible with pack siliconizing because it results in a superficial saturation predominantly composed of aluminum. When ferrosilicon is used as the active component, it determines the particularly intense formation kinetics of the non-porous siliconized coating with its maximum thickness being reached at high processing temperature values (over 1100 °C) with a proportion of 60% FeSi75 and, simultaneously, with the lowest possible proportion of ammonium chloride (max. 3%), which is the surface activation/cleaning component. Full article
(This article belongs to the Special Issue Advanced Coatings with Noble and Refractory Alloy Metals in Extreme Environments)
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19 pages, 8114 KiB  
Article
Enhanced Wear Behavior of a Stainless Steel Coating Deposited on a Medium-Carbon Low-Alloy Steel Using Ultrasonic Impact Treatment
by Li Li, Shudong Guo, Lu Jia, Li Zhang, Jiangang Li, Xigang Wang, Nannan Zhang, Hongyan Gan, Yanhui Guo and Suyan Zhao
Coatings 2023, 13(12), 2024; https://doi.org/10.3390/coatings13122024 - 30 Nov 2023
Viewed by 924
Abstract
This study aims to explore the effects of ultrasonic impact parameters on the surface modification of a stainless steel coating deposited on a medium-carbon low-alloy steel using argon arc surfacing welding. Ultrasonic impact treatment (UIT), at three different vibration strike numbers (40,000 times/(mm [...] Read more.
This study aims to explore the effects of ultrasonic impact parameters on the surface modification of a stainless steel coating deposited on a medium-carbon low-alloy steel using argon arc surfacing welding. Ultrasonic impact treatment (UIT), at three different vibration strike numbers (40,000 times/(mm2), 57,600 times/(mm2), and 75,000 times/(mm2)) marked UIT–1, UIT–2, and UIT–3, respectively, was carried out to modify the surface structure and properties of the stainless steel coating. The surface morphological and structural features, phase compositions, grain size, topography, micro-mechanical properties, as well as the wear resistance of the coating before and after UIT with different impact parameters were experimentally investigated. The results of optical microscopy (OM), scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), and X-ray diffraction (XRD) analyses revealed that the grain refinement accompanied by the formation of the strain-induced α′–martensite occurred on the UIT-treated coating surface. With the increase in the vibration strike number, the surface grain size and roughness decreased, while the α′–martensite content increased. Micro-hardness after UIT was increased by about 19% (UIT–1), 39% (UIT–2), and 57% (UIT–3), and the corresponding wear rate obtained was decreased by 39%, 72%, and 85%, respectively. Significant improvements in wear resistance were achieved using UIT. However, an excessive vibration strike number on the per unit area (/mm2) might result in unwanted micro-cracks and delamination on the treated surface, deteriorating the performance of the coating. These findings validate that UIT parameters (such as the vibration strike number on per unit area) are of great importance to bringing about improvements in wear performance, and UIT is found to have a high potential in modifying the surface characteristics and optimizing the mechanical performances of the deposited coating for a wide range of potential applications. Full article
(This article belongs to the Special Issue Advanced Coatings with Noble and Refractory Alloy Metals in Extreme Environments)
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