Advanced Thermal Spraying Technology

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Plasma Coatings, Surfaces & Interfaces".

Deadline for manuscript submissions: closed (28 February 2024) | Viewed by 1424

Special Issue Editors


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Guest Editor
Department of Chemical Engineering, Materials and Environment (DICMA), Sapienza University of Rome, Via Eudossiana, 18, 00184 Rome, Italy
Interests: thermal spray coatings; tribology; coatings for harsh environments; cermet coatings
Institute of New Materials, Guangdong Academy of Sciences, Guangzhou 510651, China
Interests: cold spray; thermal spray; additive manufacturing; metal coatings; metal matrix composite coatings; anti-corrosion coatings; tribological properties
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Special Issue Information

Dear Colleagues,

Thermal spray is a versatile family of deposition processes, useful to obtain coatings for several industrial applications – from naval to aeronautics and energy, and for protection from thermally harsh environments, as well as from wear and corrosion mechanisms, just to cite a few examples. Through the years, the research around process parameters, materials to be deposited and coatings characterization never ceased attracting the interest of the scientific community, meaning that such techniques still play a crucial role in the field of surface engineering. In fact, although thermal spray is a rather mainstream processing route, widely employed wherever either thermal or mechanical protection is needed, it still is a research hot topic due to its versatility and reliability.

This Special Issue aims to collect recent developments around thermal spray techniques, from the deposition process to the characterization of coatings. The topics of interest for this Special Issue, in particular, include (but are not restricted to):

  • Novelties in the utilization of existing deposition processes;
  • Modifications of the process parameters and configurations;
  • New coatings formulations and compositions;
  • Environmentally friendly processes and coatings;
  • Novel applications of thermal spray coatings;
  • Advancements in coatings characterization.

Dr. Lidia Baiamonte
Dr. Wen Sun
Guest Editors

Manuscript Submission Information

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Keywords

  • thermal spray processes
  • thermal sprayed coatings
  • coatings characterization
  • wear-resistant coatings
  • corrosion-resistant coatings
  • thermal and environmental barrier coatings

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Published Papers (1 paper)

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Research

16 pages, 9462 KiB  
Article
Effect of Heat Treatment on the Electrochemical and Tribological Properties of Aluminum-Bronze Coatings Deposited Used the Thermal Spraying Process
by Jose Alfredo Morales, Oscar Piamba, Jhon Olaya and Fabio Vallejo
Coatings 2024, 14(4), 423; https://doi.org/10.3390/coatings14040423 - 31 Mar 2024
Viewed by 1029
Abstract
The corrosion and wear resistance of aluminum-bronze coatings deposited by thermal flame spraying were investigated after a 10 h heat treatment at 500 °C in a nitrogen atmosphere. The coatings were characterized by SEM, EDS, XRD, and XRF. Corrosion resistance was evaluated by [...] Read more.
The corrosion and wear resistance of aluminum-bronze coatings deposited by thermal flame spraying were investigated after a 10 h heat treatment at 500 °C in a nitrogen atmosphere. The coatings were characterized by SEM, EDS, XRD, and XRF. Corrosion resistance was evaluated by Tafel and EIS tests, while wear resistance was assessed using a ball-on-disc test. Results showed the heat treatment compacted the coating microstructure, increased oxide content, and improved splat bonding through diffusion mechanisms. This led to enhanced corrosion resistance, evidenced by reduced corrosion current density in electrochemical tests, resulting from densification impeding electrolyte penetration. Heat treatment also increased wear resistance, as indicated by lower wear rates in ball-on-disc tests, attributable to increased hardness, reduced friction coefficients, and annealing-induced microstructural changes. Overall, the heat treatment optimizes the anticorrosive and tribological properties of thermally sprayed aluminum-bronze coatings via favorable alterations in composition, morphology, and physical characteristics. The research provides a new understanding of how thermal spray parameters and post-deposition heat treatment can be utilized to enhance the corrosion and wear resistance of aluminum-bronze coatings for marine applications. Full article
(This article belongs to the Special Issue Advanced Thermal Spraying Technology)
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