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Metals
Special Issues
Electrochemical Analysis of Metal Corrosion
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Electrochemical Analysis of Metal Corrosion

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

Deadline for manuscript submissions: closed (29 February 2024) | Viewed by 2182

Special Issue Editors

Dr. Rui Ding

E-Mail Website
Guest Editor
School of Ocean, Yantai University, Yantai 264005, China
Interests: intelligent anti-corrosion coatings; corrosion inhibitors; electrochemistry; marine corrosion; photoelectric anti-corrosion
Jing Lv

E-Mail Website
Guest Editor Assistant
School of Materials Science and Engineering, Ocean University of China, Qingdao, China
Interests: photoelectric anti-corrosion; intelligent anti-corrosion coatings; marine corrosion

Special Issue Information

Dear Colleagues,

Metal corrosion is the destruction of metal materials caused by chemical or electrochemical reaction between a metal and the environment. Metal corrosion is a common phenomenon in both manufacturing and daily life. Serious corrosion not only causes material failure, but may also cause unexpected disasters, resulting in economic losses and security incidents. In the 1870s, the British government assessed the impact of metal corrosion and protection on the national economy. The result showed that the annual cost of repairing damaged metal structures accounted for 3% of the annual GDP. In 2013, according to the National Association of Corrosion Engineering (NACE) survey, the cost of restoration reached 3.4% of the US annual GDP. In China, the total cost of metal corrosion in 2014 calculated by the Uhlig methods was USD 313 billion, accounting for 3.34% of annual GDP. Metal corrosion thus has a massive economic impact. In order to solve the problem of metal corrosion, a variety of advanced intelligent coatings with self-repairing function, efficient bio-based corrosion inhibitors and photoelectric anti-corrosion materials and technology have been developed. In addition, in recent years, special application scenarios have increasingly challenged the performance of metal materials. Therefore, the corrosion mechanisms of metal and anti-corrosion materials and technologies in special environments are emerging research fields.

Electrochemistry is an important science for the study of metal corrosion and anti-corrosion. In recent years, micro-area electrochemical technologies such as scanning probe technology, scanning electrochemical microscopy, in situ electrochemical technology, and the combination of electrochemistry and spectroscopy (X-ray spectroscopy, infrared spectroscopy, Raman spectroscopy, etc.) have made great progress.

This Special Issue of Metals focuses on new electrochemical research methods for the study of metal corrosion and anti-corrosion. The papers presented in this Special Issue will give an account of the scientific and technical status of new electrochemical analysis and research methods targeting the corrosion of special metals, metal corrosion in special environments, and advanced anti-corrosion materials (see the keywords/topics below). Your contribution to this Issue would be highly valuable and appreciated, and we therefore invite you to contribute your research.

Dr. Rui Ding
Guest Editors

Jing Lv
Guest Editor Assistant

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

  • micro-area electrochemistry
  • in situ electrochemical technology
  • spectroelectrochemistry
  • corrosion of special metals
  • corrosion in special environments
  • intelligent anti-corrosion coatings
  • new corrosion inhibitors
  • photoelectric anti-corrosion materials

Published Papers (2 papers)

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Research

25 pages, 6196 KiB  
Article
Use of Electrochemical Noise for the Study of Corrosion by Passivated CUSTOM 450 and AM 350 Stainless Steels
by Facundo Almeraya-Calderon, Miguel Villegas-Tovar, Erick Maldonado-Bandala, Maria Lara-Banda, Miguel Angel Baltazar-Zamora, Griselda Santiago-Hurtado, Demetrio Nieves-Mendoza, Luis Daimir Lopez-Leon, Jesus Manuel Jaquez-Muñoz, Francisco Estupiñán-López and Citlalli Gaona-Tiburcio
Metals 2024, 14(3), 341; https://doi.org/10.3390/met14030341 - 16 Mar 2024
Viewed by 721
Abstract
Precipitation-hardening stainless steels, like AM 350 and Custom 450, are extensively utilized in various aerospace applications. The latter steel is utilized for applications needing great strength and corrosion resistance. In contrast, the former steel has a good corrosion resistance and moderate strength. The [...] Read more.
Precipitation-hardening stainless steels, like AM 350 and Custom 450, are extensively utilized in various aerospace applications. The latter steel is utilized for applications needing great strength and corrosion resistance. In contrast, the former steel has a good corrosion resistance and moderate strength. The purpose of this study was to analyze transient frequencies in the electrochemical noise of Custom 450 and AM 350 stainless steels that had been passivated for 60 and 90 min at 25 and 49 °C using baths of citric and nitric acid and then immersed in solutions containing 1% sulfuric acid (H2SO4) and 5% sodium chloride (NaCl). The potentiodynamic polychromatic curves employed electrochemical techniques and noise (EN) based on the ASTM-G5 and G199 standards. Two methods of data analysis were applied concerning EN: the domain of frequencies (power spectral density, PSD) and the time–frequency domain (Hilbert-Huang Transform). The PHSS passivated in citric acid indicated current densities in the H2SO4 solution between 10−2 and 10−3 mA/cm2, while those in the NaCl solution were recorded around 10−4 and 10−5 mA/cm2. The citric acid functions as a passivating agent. The results of the electrochemical noise analysis show that the PHSS passivated in nitric acid displayed a greater corrosion resistance. Moreover, there is a tendency for PHSS to be passivated in nitric acid to corrode locally. Full article
(This article belongs to the Special Issue Electrochemical Analysis of Metal Corrosion)
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15 pages, 5100 KiB  
Article
Intergranular Corrosion Analysis of Austenitic Stainless Steels in Molten Nitrate Salt Using Electrochemical Characterization
by Noparat Kanjanaprayut, Thamrongsin Siripongsakul and Piyorose Promdirek
Metals 2024, 14(1), 106; https://doi.org/10.3390/met14010106 - 16 Jan 2024
Viewed by 995
Abstract
This study investigates the influence of molten nitrate salt exposure on the intergranular corrosion (IGC) behavior of three grades of austenitic stainless steel (namely, AISI 304, AISI 304H, and AISI 321H). Two electrochemical techniques, double loop electrochemical potentiokinetic reactivation and potentiodynamic polarization methods, [...] Read more.
This study investigates the influence of molten nitrate salt exposure on the intergranular corrosion (IGC) behavior of three grades of austenitic stainless steel (namely, AISI 304, AISI 304H, and AISI 321H). Two electrochemical techniques, double loop electrochemical potentiokinetic reactivation and potentiodynamic polarization methods, are applied after stainless steel is exposed to 600 °C molten nitrate salt, 60% NaNO3, and 40% KNO3 for varying immersion durations. Corrosion morphology is examined using optical microscopy and scanning electron microscopy images to assess susceptibility to IGC. IGC is prompted by the presence of chromium carbides at grain boundaries, which leads to chromium depletion around these carbides. The findings of the experiments reveal distinct IGC behavior among stainless steel grades. For AISI 304, the degree of sensitization (DOS) increases as exposure time progresses. However, AISI 304H and AISI 321H stainless steel exhibit diminishing DOS after 100 and 10 h of exposure, respectively. This trend is attributed to desensitization or the healing effect when stainless steel is exposed to molten salt for a prolonged time. The depletion and recovery of Cr near grain boundaries are confirmed by the inverse relationship to DOS of pitting potential. Full article
(This article belongs to the Special Issue Electrochemical Analysis of Metal Corrosion)
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