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Molecules
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Electrochemistry and Corrosion Protection of Metallic Materials
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Electrochemistry and Corrosion Protection of Metallic Materials

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Materials Chemistry".

Deadline for manuscript submissions: closed (30 September 2022) | Viewed by 9544

Special Issue Editors

Dr. Mosab Kaseem

E-Mail Website
Guest Editor
Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 05006, Republic of Korea
Interests: corrosion matter of protective metallic materials via plasma electrolysis; surface modification via organic–inorganic conjugation; electrochemical interpretation per equivalent circuit model; plasticity control and mechanical modeling of nanostructured crystalline solid; biodegradable polymers; development of bioactive coatings on metallic materials
Special Issues, Collections and Topics in MDPI journals
Dr. Burak Dikici

E-Mail Website
Guest Editor
Department of Mechanical Engineering, Ataturk University, 25240 Erzurum, Turkey
Interests: manufacturing processes of bio-coatings; in vitro corrosion of biomaterials; biodegradable metallic materials; high-entropy alloy coatings; sol-gel; PVD/CVD-based coatings; bioceramic coatings; plasma electrolytic oxidation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Degradation of metallic materials, under the action of the surrounding environments due to chemical or electrochemical reactions, is a serious issue limiting the use of metallic materials in advanced engineering applications. To solve this problem, understanding the electrochemical kinetics between metal surfaces and their environment involved in the corrosion process and modification of surfaces with extraordinary performance are needed. The purpose of this special issue on ‘Electrochemistry and Corrosion Protection of Metallic Materials’ is to publish the latest experimental and theoretical developments related to the corrosion behavior of metallic materials as well as methods that can lead to suppressing such phenomenon. This issue highlights advances in this growing field in various topics of interest include, but are not restricted to, the novel approaches to tailor coating with a myriad of functional purposes in a general or specific service environment, the corrosion performance of protective coatings, the corrosion mechanism based on the evaluation of electrochemical behavior, and any other aspects related to corrosion of metals. All manuscripts are thoroughly reviewed and those accepted will be published immediately online in an on-going fashion in this Special Issue.

Prof. Dr. Mosab Kaseem
Prof. Dr. Burak Dikici
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. Molecules is an international peer-reviewed open access semimonthly 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 2700 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

  • Metallic materials
  • Metal matrix composites
  • Functional metallic materials
  • Metal-based biomaterials
  • Coatings
  • Corrosion
  • Corrosion inhibitors
  • Corrosion products
  • Corrosion mechanism
  • Corrosion protection
  • Corrosion monitoring
  • Tribocorrosion
  • Electrochemical techniques
  • Passivation
  • Theoretical approaches – computational evaluation

Published Papers (4 papers)

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Research

17 pages, 4364 KiB  
Article
Contributions of Microelectrochemical Scanning Techniques for the Efficient Detection of Localized Corrosion Processes at the Cut Edges of Polymer-Coated Galvanized Steel
by Dániel Filotás, Javier Izquierdo, Bibiana M. Fernández-Pérez, Lívia Nagy, Géza Nagy and Ricardo M. Souto
Molecules 2022, 27(7), 2167; https://0-doi-org.brum.beds.ac.uk/10.3390/molecules27072167 - 27 Mar 2022
Cited by 4 | Viewed by 2112
Abstract
Spatially resolved information on corrosion reactions operating at the cut edges of coated metals can be obtained using microelectrochemical scanning techniques using a suitable selection of operation modes and scanning probes. The scanning vibrating electrode technique (SVET) provides current density maps with a [...] Read more.
Spatially resolved information on corrosion reactions operating at the cut edges of coated metals can be obtained using microelectrochemical scanning techniques using a suitable selection of operation modes and scanning probes. The scanning vibrating electrode technique (SVET) provides current density maps with a spatial resolution of the order of the dimensions of the sample, which allows the temporal evolution of the corrosion reactions to be followed over time. This leads to the identification and localization of cathodic and anodic sites, although the technique lacks chemical specificity for the unequivocal identification of the reactive species. The application of scanning electrochemical microscopy (SECM) was previously limited to image cathodic reaction sites, either due to oxygen consumption in the amperometric operation or by the alkalinisation of the electrolyte in potentiometric operation. However, it is shown that anodic sites can be effectively monitored using an ion-selective microelectrode (ISME) as a probe. The ISME probes detected differences in the local concentrations of Zn2+ and OH− ions from the cut edges of a complete coil coating system compared to the same system after the polymeric layers were removed. In this way, it has been shown that the inhibitor loading in the polymer layers effectively contributes to reducing the corrosion rates at the cut edge, thus helping to extend the useful life of the sacrificial galvanized layer bonded directly to the steel matrix. Additionally, these two probe configurations can be integrated into a multi-electrode tip for potentiometric operation to simultaneously monitor localized changes in pH values and metal ion dissolution in a single scan. Spatial and temporal distributions were further investigated using different rastering procedures, and the potential of constructing pseudomaps for 2D-imaging is described. Full article
(This article belongs to the Special Issue Electrochemistry and Corrosion Protection of Metallic Materials)
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16 pages, 4137 KiB  
Article
Long-Term Potentiodynamic Testing and Tribometric Properties of Amorphous Alloy Coatings under Saline Environment
by Amjad Iqbal, Ayesha Iqbal, Grzegorz Moskal, Muhammad Yasir, Abdullah I. Al-Mansour, Mohammad Amir Khan, Shamshad Alam, Muhammad Shahbaz, Adeel Zia and Ahsan Ejaz
Molecules 2022, 27(4), 1421; https://0-doi-org.brum.beds.ac.uk/10.3390/molecules27041421 - 19 Feb 2022
Cited by 6 | Viewed by 2551
Abstract
Protective coatings for harsh environments are always welcome, but they must overcome profound challenges, including corrosion and wear resistance. The purpose of this study is to look into the long-term potentiodynamic polarization measurements and dry tribometric behavior of plasma-sprayed amorphous coatings on AISI [...] Read more.
Protective coatings for harsh environments are always welcome, but they must overcome profound challenges, including corrosion and wear resistance. The purpose of this study is to look into the long-term potentiodynamic polarization measurements and dry tribometric behavior of plasma-sprayed amorphous coatings on AISI 1035 mild steel. To investigate the impact of unique active polarization potentials on the electrochemical studies of the iron-based amorphous layer, which compares favorably to AISI 1035 mild steel, the active potential polarization curve and friction coefficient tests were performed. Scanning electron microscopy (SEM) and energy dispersive x-ray (EDX) analyses were used to investigate the coating’s corrosion behavior. Their mechanical (Tribometric tests at higher sliding speeds) and chemical properties (electrochemical potentiodynamic polarization investigations) have also been thoroughly investigated. There is enough validation that these protective coatings can be used in hostile environments. The effects of long-term corrosion for 24 and 48 h were thoroughly examined. Tribometric examinations revealed that amorphous layers are highly resistant under dry conditions, as they offered a very low and stable friction coefficient less than 4 μ with micro Vickers hardness 1140 ± 22.14 HV, which is more than twice as compared to mild steel AISI 1035. The corrosion resistance of coatings in 3.5 wt % NaCl solution displays active transition characteristics of activation, passivation, over passivation, and pitting, as shown by the potentiodynamic polarization curves. Full article
(This article belongs to the Special Issue Electrochemistry and Corrosion Protection of Metallic Materials)
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17 pages, 2810 KiB  
Article
Role of Surface Preparation in Corrosion Resistance Due to Silane Coatings on a Magnesium Alloy
by Abhishek Saxena and R. K. Singh Raman
Molecules 2021, 26(21), 6663; https://0-doi-org.brum.beds.ac.uk/10.3390/molecules26216663 - 3 Nov 2021
Cited by 5 | Viewed by 1689
Abstract
Coating of an organo-silane (Bis-1,2-(TriethoxySilyl)Ethane (BTSE)) has been observed to improve the corrosion resistance of magnesium alloy AZ91D. Three different types of surface preparations have been employed before condensing the silane coating on to the substrate. Corrosion resistance was investigated using electrochemical impedance [...] Read more.
Coating of an organo-silane (Bis-1,2-(TriethoxySilyl)Ethane (BTSE)) has been observed to improve the corrosion resistance of magnesium alloy AZ91D. Three different types of surface preparations have been employed before condensing the silane coating on to the substrate. Corrosion resistance was investigated using electrochemical impedance spectroscopy (EIS). A specific alkali treatment of the substrate prior to the coating has been found to improve the corrosion resistance of the coated alloy, which has been attributed to the ability of the treatment in facilitating the condensation of a relatively compact siloxane film. Full article
(This article belongs to the Special Issue Electrochemistry and Corrosion Protection of Metallic Materials)
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20 pages, 7592 KiB  
Article
Surface Properties of Graphene Functionalized TiO2/nHA Hybrid Coatings Made on Ti6Al7Nb Alloys via Plasma Electrolytic Oxidation (PEO)
by Oktay Yigit, Niyazi Ozdemir, Burak Dikici and Mosab Kaseem
Molecules 2021, 26(13), 3903; https://0-doi-org.brum.beds.ac.uk/10.3390/molecules26133903 - 25 Jun 2021
Cited by 18 | Viewed by 2175
Abstract
Nano-hydroxyapatite (nHA)-matrix coatings containing graphene nanosheets (GNS)-nHA were coated on Ti6Al7Nb alloys by plasma electrolytic oxidation (PEO) treatment for the improvement of their surface properties. Crystallographic properties, functional groups, and elemental analysis of coatings were characterized by XRD, ATR–FTIR, and EDS analysis. Surface [...] Read more.
Nano-hydroxyapatite (nHA)-matrix coatings containing graphene nanosheets (GNS)-nHA were coated on Ti6Al7Nb alloys by plasma electrolytic oxidation (PEO) treatment for the improvement of their surface properties. Crystallographic properties, functional groups, and elemental analysis of coatings were characterized by XRD, ATR–FTIR, and EDS analysis. Surface morphological changes of the coated surfaces were investigated by AFM and SEM. The electrochemical corrosion behavior of the coatings was examined by using the potentiodynamic scanning (PDS) tests under in-vitro conditions in simulated body fluid (SBF). The results showed that the GNS was successfully deposited in ceramic matrix coatings on Ti6Al7Nb alloys. Also, the microstructural observations revealed that the coatings have a porous and rough structure. The XRD and ATR–FTIR quantitative analysis have proved the appearance of HA and GNS in the coating layers. An increase in the coating thickness, surface hardness, and anatase/rutile transformation rate was determined, while the GNS ratio in the coating layers was increased. The microhardness of the nHA coating reinforced with 1.5 wt% GNS was measured at 862 HV, which was significantly higher than that of GNS-free (only nHA) coating (584 HV). The best in-vitro resistance to corrosion in SBF was observed in the nHA/1.5GNS wt% coating. Full article
(This article belongs to the Special Issue Electrochemistry and Corrosion Protection of Metallic Materials)
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