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Electrochemical and Corrosion Behavior of Promising Metallic Materials in the...
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Electrochemical and Corrosion Behavior of Promising Metallic Materials in the Field of Recent Research

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

Deadline for manuscript submissions: closed (10 November 2023) | Viewed by 6403

Special Issue Editor

Dr. Leoš Doskočil

E-Mail Website
Guest Editor
Faculty of Chemistry, Institute of Materials Chemistry Institution, Brno University of Technology, Brno, Czech Republic
Interests: corrosion; electrochemistry; corrosion protection; super-hydrophobic coatings; corrosion inhibitors; natural organic matter; characterization of corrosion products and organic matter; magnesium and its alloys
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Magnesium and its alloys have excellent physical and chemical properties such as low density, high strength, thermal conductivity, good damping performance, biocompatibility, recyclability etc. They are considered to have great application potential especially in the fields of transportation (including aerospace) and biomedical applications. Unfortunately, poor corrosion resistance is the most important property that limits the industrial application of magnesium-based materials. In recent years, efforts have been made to develop new compositions, surface modifications, or deformation processes to improve the corrosion resistance of magnesium and its alloys. Despite the large scientific progress, there is still potential for the development of new solutions and overcoming the knowledge gap.
 
The scope of this Special Issue should provide comprehensive insight on corrosion processes in different environments and under different conditions, anti-corrosion coatings of different origins including current trends and advanced strategies such as superhydrophobic treatments, smart materials, corrosion inhibitors etc. Review papers are also welcome.
 
Of course, recent research is not limited to magnesium alloys, but also to other metallic materials. Therefore, the Special Issue is open to the publication of original articles that provide information on the electrochemical and corrosion properties of surface-treated metallic materials or materials interacting in corrosive environments, which have not yet been sufficiently studied.
 
Moreover, the Special Issue offers the opportunity to publish Perspective articles that describe new directions for topical areas of interest in corrosion research of metallic materials. They should present novel assimilation of scientific information in current or emerging fields that indicate potential trends or innovative applications. Prospective articles may not include data. Their main purpose is to highlight and stimulate a new direction of research. 
 
Dr. Leoš Doskočil
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

  • Magnesium based materials
  • Corrosion  
  • Corrosion protection
  • Biomedical applications
  • Superhyrophobic surfaces and coating
  • Smart materials (e.g. self-healing and slow-release coatings)
  • Corrosion inhibitors
  • Sacrificial anode
  • Electrochemical characterization

Published Papers (3 papers)

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Research

14 pages, 5208 KiB  
Article
Non-Linear Evaluation of Coatings Performance: Evaluation of Polyester/Melamine Coil Coating Hydrolysis in NSS Test
by Esteban M. García-Ochoa, Xenia I. Suárez-Corrales, Pablo J. Maldonado-Rivas, William A. Talavera-Pech and Francisco Corvo
Coatings 2023, 13(8), 1327; https://doi.org/10.3390/coatings13081327 - 28 Jul 2023
Viewed by 759
Abstract
Coating is one of the most common and effective ways to protect metallic elements from corrosion. The evaluation of a coating’s performance is related to its quality and durability. Neutral salt spray (NSS) is a common accelerated test used for coatings. Commercial polyester/melamine [...] Read more.
Coating is one of the most common and effective ways to protect metallic elements from corrosion. The evaluation of a coating’s performance is related to its quality and durability. Neutral salt spray (NSS) is a common accelerated test used for coatings. Commercial polyester/melamine coil coatings applied on aluminum specimens were exposed to NSS and recorded at 0, 200,400, 600 and 1000 h of exposure. Coating performance changed with time of exposure. The main degradation process is due to the hydrolysis of the coating. A decrease in corrosion rate was observed due to the sealing of the coating, probably due to the deposition of corrosion products, salts, or a mixture of both. EN (electrochemical noise) was a more sensitive technique comapred to EIS (electrochemical impedance spectroscopy). The first changes in the coating were detected after 400 h of exposure by EIS and after 200 h by EN. EIS and EN showed equivalent results in studying the corrosion evolution of coated aluminum. Non-linear analysis using recursive plots (RP) showed the chaotic dynamics occurring with time and the interaction of micro electrochemical cells that formed on the metallic surface; it offered information similar tothe traditional EIS technique and adds complementary data to understand the corrosion phenomenon. Full article
(This article belongs to the Special Issue Electrochemical and Corrosion Behavior of Promising Metallic Materials in the Field of Recent Research)
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15 pages, 2428 KiB  
Article
Electrochemical Corrosion Behavior of Pure Mg Processed by Powder Metallurgy
by Jozef Minda, Stanislava Fintová, Branislav Hadzima, Pavel Doležal, Michaela Hasoňová, Leoš Doskočil and Jaromír Wasserbauer
Coatings 2021, 11(8), 986; https://doi.org/10.3390/coatings11080986 - 19 Aug 2021
Cited by 4 | Viewed by 2278
Abstract
Pure Mg samples were prepared by powder metallurgy using the cold and hot compacting methods. Cold compacted pure Mg (500 MPa/RT) was characterized by 5% porosity and the mechanical bonding of powder particles. Hot compacted samples (100 MPa/400 °C and 500 MPa/400 °C) [...] Read more.
Pure Mg samples were prepared by powder metallurgy using the cold and hot compacting methods. Cold compacted pure Mg (500 MPa/RT) was characterized by 5% porosity and the mechanical bonding of powder particles. Hot compacted samples (100 MPa/400 °C and 500 MPa/400 °C) exhibited porosity below 0.5%, and diffusion bonding combined with mechanical bonding played a role in material compaction. The prepared pure Mg samples and wrought pure Mg were subjected to corrosion tests using electrochemical impedance spectroscopy. Similar material corrosion behavior was observed for the samples compacted at 500 MPa/RT and 100 MPa/400 °C; however, hot compacted samples processed at 500 MPa/400 °C exhibited longer corrosion resistance in 0.9% NaCl solution. The difference in corrosion behavior was mainly related to the different binding mechanisms of the powder particles. Cold compacted samples were characterized by a more pronounced corrosion attack and the creation of a porous layer of corrosion products. Hot compacted samples prepared at 500 MPa/400 °C were characterized by uniform corrosion and the absence of a layer of corrosion products on the specimen surface. Powder-based cold compacted samples exhibited lower corrosion resistance compared to the wrought pure Mg, while the corrosion behavior of the hot compacted samples prepared at 500 MPa/400 °C was similar to that of wrought material. Full article
(This article belongs to the Special Issue Electrochemical and Corrosion Behavior of Promising Metallic Materials in the Field of Recent Research)
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19 pages, 54199 KiB  
Article
Characterization and Corrosion Properties of Fluoride Conversion Coating Prepared on AZ31 Magnesium Alloy
by Juliána Dziková, Stanislava Fintová, Daniel Kajánek, Zuzana Florková, Jaromír Wasserbauer and Pavel Doležal
Coatings 2021, 11(6), 675; https://doi.org/10.3390/coatings11060675 - 02 Jun 2021
Cited by 15 | Viewed by 2569
Abstract
Wrought AZ31 magnesium alloy was used as the experimental material for fluoride conversion coating preparation in Na[BF4] molten salt. Two coating temperatures, 430 °C and 450 °C, and three coating times, 0.5, 2, and 8 h, were used for the coating [...] Read more.
Wrought AZ31 magnesium alloy was used as the experimental material for fluoride conversion coating preparation in Na[BF4] molten salt. Two coating temperatures, 430 °C and 450 °C, and three coating times, 0.5, 2, and 8 h, were used for the coating preparation. A scanning electron microscope and energy-dispersive X-ray spectroscopy were used for an investigation of the surface morphology and the cross-sections of the prepared coatings including chemical composition determination. The corrosion resistance of the prepared specimens was investigated in terms of the potentiodynamic tests, electrochemical impedance spectroscopy and immersion tests in the environment of simulated body fluids at 37 ± 2 °C. The increase in the coating temperature and coating time resulted in higher coatings thicknesses and better corrosion resistance. Higher coating temperature was accompanied by smaller defects uniformly distributed on the coating surface. The defects were most probably created due to the reaction of the AlxMny intermetallic phase with Na[BF4] molten salt and/or with the product of its decomposition, BF3 compound, resulting in the creation of soluble Na3[AlF6] and AlF3 compounds, which were removed from the coating during the removal of the secondary Na[MgF3] layer. The negative influence of the AlxMny intermetallic phase was correlated to the particle size and thus the size of created defects. Full article
(This article belongs to the Special Issue Electrochemical and Corrosion Behavior of Promising Metallic Materials in the Field of Recent Research)
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