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Metals
Special Issues
Corrosion and Protection of Metallic Alloys
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Corrosion and Protection of Metallic Alloys

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Corrosion and Protection".

Deadline for manuscript submissions: closed (31 August 2023) | Viewed by 5891

Special Issue Editor

Prof. Dr. Hualiang Huang

E-Mail Website
Guest Editor
School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430205, China
Interests: corrosion mechanisms; corrosion inhibitors; coatings

Special Issue Information

Dear Colleagues,

When metallic alloys make contact with a corrosive environment, corrosion will inevitably occur, which affects their performance and service life and sometimes causes safety accidents and significant economic losses. Therefore, it is of great theoretical and practical significance to study the corrosion behavior and mechanisms of metallic alloys and establish reliable protective measures, such as corrosion inhibitors and coating.

Prof. Dr. Hualiang Huang
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. Metals 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

  • Mg alloy
  • Al alloy
  • corrosion
  • inhibitors
  • coatings

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Published Papers (3 papers)

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Research

17 pages, 3159 KiB  
Article
Corrosion Resistance of Titanium Alloys Anodized in Alkaline Solutions
by Facundo Almeraya-Calderón, Jesús M. Jáquez-Muñoz, Erick Maldonado-Bandala, Jose Cabral-Miramontes, Demetrio Nieves-Mendoza, Javier Olgui-Coca, Luis Daimir Lopez-Leon, Francisco Estupiñán-López, Alejandro Lira-Martínez and Citlalli Gaona Tiburcio
Metals 2023, 13(9), 1510; https://doi.org/10.3390/met13091510 - 23 Aug 2023
Cited by 10 | Viewed by 2361
Abstract
Titanium alloys present superior electrochemical properties due to the generation of the TiO2 passive layer. The ability to generate an oxide passive layer depends on the anodized alloy. This work mainly studies the corrosion resistance of the alloys Ti-6Al-2Sn-4Zr-2Mo and Ti-6Al-4V anodized [...] Read more.
Titanium alloys present superior electrochemical properties due to the generation of the TiO2 passive layer. The ability to generate an oxide passive layer depends on the anodized alloy. This work mainly studies the corrosion resistance of the alloys Ti-6Al-2Sn-4Zr-2Mo and Ti-6Al-4V anodized in NaOH and KOH at 1 M and 0.025 A/cm2 of current density. The electrochemical techniques were performed in a conventional three-electrode cell exposed to electrolytes of NaCl and H2SO4. Based on ASTM-G61 and G199, cyclic potentiodynamic polarization (CPP) and electrochemical noise (EN) techniques were used. The results indicated that Ti-6Al-2Sn-4Zr-2Mo anodized on NaOH presented a higher passivity range than anodized on KOH, relating to the high reactivity of Na+ ions. The former anodized alloy also demonstrated a higher passive layer rupture potential. In EN, the results showed that Ti-6Al-4V anodized in KOH presented a trend toward a localized process due to the heterogeneity of anodized porosity and the presence of V in the alloy. Full article
(This article belongs to the Special Issue Corrosion and Protection of Metallic Alloys)
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20 pages, 8314 KiB  
Article
Effect of Dissolved CO2 on the Interaction of Stress and Corrosion for Pipeline Carbon Steels in Simulated Marine Environments
by Shamsuddeen Ashurah Abubakar, Stefano Mori and Joy Sumner
Metals 2023, 13(7), 1165; https://doi.org/10.3390/met13071165 - 22 Jun 2023
Cited by 3 | Viewed by 1689
Abstract
Offshore pipelines are subjected to stresses (e.g., from fluid flow, mechanical vibration, and earth movement). These stresses, combined with corrosive environments and in the presence of trace gases (O2, CO2), can increase the pipeline’s corrosion rate and potentially lead [...] Read more.
Offshore pipelines are subjected to stresses (e.g., from fluid flow, mechanical vibration, and earth movement). These stresses, combined with corrosive environments and in the presence of trace gases (O2, CO2), can increase the pipeline’s corrosion rate and potentially lead to cracking. As such, the impact of trace gases such as CO2 (linked to enhanced oil recovery and carbon capture and sequestration) on corrosion is key to determining whether pipelines are at increased risk. American Petroleum Institute (API) 5L X70 and X100 were exposed as stressed C-rings (80% or 95% of yield strength). The tests were conducted with either N2 (control) or CO2 bubbled through 3.5% NaCl, at either 5 °C or 25 °C. Linear polarization resistance was used to assess corrosion rate, while morphology and variation were determined using optical microscopy (generating metal loss distributions) and scanning electron microscopy. The control experiment (N2) showed that corrosion rates correlated with temperature and stress. In this low O2 environment, both alloys showed similar trends. Under CO2 exposure, all samples showed accelerated corrosion rates; furthermore, the morphologies generated were different for the two alloys: undercutting corrosion with discontinuous microcracks (X70) or deep, wide ellipses (X100). Understanding these changes in corrosion response is key when selecting materials for specific operational environments. Full article
(This article belongs to the Special Issue Corrosion and Protection of Metallic Alloys)
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13 pages, 4943 KiB  
Article
Characterization of Iron Aluminide Diffusion Coatings Obtained after Friction Surfacing
by Norberto Martins, Ana Paula Silva, Gilmar Cordeiro da Silva, Ítalo Bruno dos Santos, Carlos Eduardo dos Santos, Fernanda Troysi and Pedro Brito
Metals 2023, 13(3), 461; https://doi.org/10.3390/met13030461 - 23 Feb 2023
Cited by 1 | Viewed by 1449
Abstract
Iron aluminides are considered as candidate materials for high temperature applications for their excellent high temperature corrosion and oxidation resistance. In the present work, iron-aluminide coatings were developed by friction surfacing (6351 aluminum alloy deposited on a low-carbon steel substrate) followed by a [...] Read more.
Iron aluminides are considered as candidate materials for high temperature applications for their excellent high temperature corrosion and oxidation resistance. In the present work, iron-aluminide coatings were developed by friction surfacing (6351 aluminum alloy deposited on a low-carbon steel substrate) followed by a diffusion heat treatment. The initial coatings were found to be geometrically homogenous and adhered well to the steel substrate. The heat treatment process was carried out at 550 °C for 48, 72 and 96 h and the resulting coatings were characterized in terms of microstructure, chemical composition, hardness distribution and phase composition. After heat treatment, the coating/substrate interface morphology was modified and presented patterns typical of Fe-Al intermetallic formation, as well as a substantial increase in hardness (>900 HV) relative to the initial as-deposited condition. With the diffusion treatment, initially Fe2Al5 was found to develop in the coatings, which was converted into FeAl2 after longer exposures. Full article
(This article belongs to the Special Issue Corrosion and Protection of Metallic Alloys)
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