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Coatings
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Detection and Monitoring of Corrosion in Steel Structures
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Detection and Monitoring of Corrosion in Steel Structures

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

Deadline for manuscript submissions: closed (31 October 2024) | Viewed by 7143

Special Issue Editor

Dr. Qunfeng Zeng

E-Mail Website
Guest Editor
School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China
Interests: tribology; corrosion; tribocorrosion; superlubricity; ultra-low wear; new materials; surface coatings; lubricants
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The process of identifying the elements that lead to corrosion or rust on metals after exposure to typical atmospheric conditions is known as corrosion detection. This is essential for determining the materials' ability to withstand the existing environmental factors and vital in identifying the strength of materials before use in building, construction or any other operation.

Corrosion can be one of the biggest threats to the longevity of metals. It can pose safety risks to people working with metallic objects, huge equipment costs, and subsequent environmental damage. However, through its detection, it is possible to determine, examine and predict the strength and durability of the materials in use. This is why surface degradation monitoring and rust detection are so important. They help mitigate these risks and expenses by preventing the degradation of metallic surfaces over time, allowing problems to be addressed before they reach a critical point. It also improves safety, reduces costs and increases the efficiency of the monitored structures.

Based on all this, the suggested scope of this Special Issue includes (but is not limited to) the following concepts:

  • Advanced corrosion detection and monitoring techniques;
  • Improved knowledge of corrosion protection of steel surfaces;
  • Intelligent industrial corrosion monitoring technology online;
  • Novel anti-corrosion coatings or surface treatments with improved durability;
  • New protection techniques of metals in extreme environments and conditions;
  • Corrosion detection data information system.

Dr. Qunfeng Zeng
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

  • corrosion detection
  • corrosion monitoring
  • surface degradation
  • steel protection
  • anti-corrosion coatings

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Published Papers (4 papers)

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Research

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14 pages, 8016 KiB  
Article
Study on Electrochemical Corrosion of Q235 Steel in Sand Containing HA Solution under a Natural Air-Dried State
by Ruizhen Xie, Yage Bao, Ruicheng Geng, Qi Zhang, Haosheng Hou, Yakang Wang, Boqiong Li, Pengju Han, Zhenxia Wang, Shiying Wang, Naiming Lin and Baojie Dou
Coatings 2024, 14(4), 491; https://doi.org/10.3390/coatings14040491 - 16 Apr 2024
Viewed by 1025
Abstract
To explore the corrosion of Q235 steel in sand containing a simulated haze aqueous solution (HA solution) under a natural air-dried state, the effect of moisture (age) on the corrosion of Q235 steel in sand was comprehensively studied by EIS, polarization curve, SEM, [...] Read more.
To explore the corrosion of Q235 steel in sand containing a simulated haze aqueous solution (HA solution) under a natural air-dried state, the effect of moisture (age) on the corrosion of Q235 steel in sand was comprehensively studied by EIS, polarization curve, SEM, EDS and XPS. The physical and chemical properties of the sand showed that the sand containing the HA solution was basically neutral under natural air drying, and the temperature was around 20 °C. After 14 days, the moisture content gradually decreased from 30% to 0%, and the salinity decreased from 1.26% to 0.04%. With the increase in age, the Eocp gradually positively skews, indicating the corrosion kinetics of the Q235 steel decrease. The impedance spectra showed that in the frequency of 10−2–103 Hz, the impedance spectra exhibited a flat capacitive loop, and the corrosion of Q235 steel was the strongest in the sand containing HA solution on the 8 d. The polarization curves showed that with increasing age, the degree of corrosion of Q235 steel changed from medium or above to slight corrosion in the sand containing HA solution. The pitting characteristics of anode branch for polarization curve also indicate the faster corrosion kinetics of Q235 steel in the early age (1–5 d). The corrosion current density Io first increased and then decreased, and the highest value was 3.44 × 10−5 A/cm2 at 6 d. The average corrosion rate was 0.1629 mm/a. HA solution accelerates the corrosion of Q235 steel in sand without HA solution (average corrosion rate, 1.51 × 10−2 mm/a). A large amount of brown-yellow corrosion products (iron oxides, about 70–200 μm) presented on the surface of the Q235 steel. The corrosion of Q235 steel belonged to local corrosion, and the corrosion pits were connected to form a large dimple-like area. The HA solution and the porous structure of sand jointly affect the electrochemical corrosion of Q235 steel. Full article
(This article belongs to the Special Issue Detection and Monitoring of Corrosion in Steel Structures)
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14 pages, 3350 KiB  
Article
Effect of Electrode Spacing on the Detection of Coating Defects in Buried Pipelines Using Direct Current Voltage Gradient Method
by Seung-Heon Choi, Young-Ran Yoo and Young-Sik Kim
Coatings 2023, 13(8), 1471; https://doi.org/10.3390/coatings13081471 - 21 Aug 2023
Cited by 1 | Viewed by 1384
Abstract
Buried piping is subject to soil corrosion, which can be prevented by combining coatings and cathodic protection to maximize corrosion control. However, even with both methods, coatings are subject to damage from external factors and various causes. Buried piping may expose the metal [...] Read more.
Buried piping is subject to soil corrosion, which can be prevented by combining coatings and cathodic protection to maximize corrosion control. However, even with both methods, coatings are subject to damage from external factors and various causes. Buried piping may expose the metal and alter the current flow, which in turn causes corrosion. Therefore, this study analyzed the effect of detection electrode spacing on the direct current voltage gradient (DCVG) magnitude formed for coated pipelines buried in the soil. The DCVG was measured using a real-time coating defect detection system. FEM model simulations were carried out, and then the result was compared to the measured DCVG magnitude. When the spacing of the detection electrodes increased, the detected signal and signal location changed. The detection reliability increased as the noise signal is eliminated at the optimum detection electrode spacing. However, the detection reliability decreased at higher selection electrode spacing as the noise signal and detected signals together were eliminated. The location of the detected signal shifted as the spacing of the detection electrodes increased due to the change in the detection reference point and signal magnitude. Full article
(This article belongs to the Special Issue Detection and Monitoring of Corrosion in Steel Structures)
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11 pages, 2089 KiB  
Article
The Effects of a Multifunctional Rust Inhibitor on the Rust Resistance Mechanism of Carbon Steel and the Properties of Concrete
by Zhiqiang Niu, Xiaoming Lu and Yanan Luo
Coatings 2023, 13(8), 1375; https://doi.org/10.3390/coatings13081375 - 5 Aug 2023
Cited by 1 | Viewed by 1498
Abstract
To address rebar corrosion in existing concrete structures, a multifunctional compound rust inhibitor was developed. This study investigates the impact of this inhibitor on carbon steel rust resistance, as well as the mechanical properties and durability of concrete. The results demonstrate a significant [...] Read more.
To address rebar corrosion in existing concrete structures, a multifunctional compound rust inhibitor was developed. This study investigates the impact of this inhibitor on carbon steel rust resistance, as well as the mechanical properties and durability of concrete. The results demonstrate a significant reduction in weight loss of carbon steel when using a multifunctional rust inhibitor, with a rust inhibition efficiency of 82.6%. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) were employed to observe and analyze the surface elements of carbon steel, both with and without the presence of a rust inhibitor. The findings indicate that the use of a rust inhibitor leads to a smoother and more stable surface film. The results of the experiments on compressive strength, chloride ion electromobility, and the rapid carbonation test of concrete with varying rust inhibitor contents indicate that increasing the amount of rust inhibitor can improve the compressive performance of concrete and can regulate the mobility of chloride ions. Specifically, when the rust inhibitor content reaches 4%, it has a notable positive impact on the performance of concrete, and further increases in content lead to smoother results. Full article
(This article belongs to the Special Issue Detection and Monitoring of Corrosion in Steel Structures)
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Review

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30 pages, 6330 KiB  
Review
A Systematic Review of the Recent Advances in Superlubricity Research
by Qunfeng Zeng and Wenling Zhang
Coatings 2023, 13(12), 1989; https://doi.org/10.3390/coatings13121989 - 23 Nov 2023
Cited by 5 | Viewed by 2593
Abstract
Friction and the wear caused by friction will not only lead to energy dissipation, but will also cause damage to the function of mechanical parts, affecting the precision and lifespan of mechanical devices. Superlubricity as an ideal state of zero friction has become [...] Read more.
Friction and the wear caused by friction will not only lead to energy dissipation, but will also cause damage to the function of mechanical parts, affecting the precision and lifespan of mechanical devices. Superlubricity as an ideal state of zero friction has become a hot research topic in recent years. There have been many reviews on the concept, origin, and research progress of superlubricity, but, among them, there are more presentations on the research status of solid superlubricity and liquid superlubricity; however, the theoretical summarization of solid–liquid combined superlubricity and high-temperature superlubricity is still imperfect and lacks a systematic and comprehensive review. The mechanism of superlubricity is not explicitly presented in many reviews, which are clearly summarized in this paper. This paper introduces superlubricity from friction, and then introduces the origin of superlubricity, and presents the research progress on superlubricityby separating it into in four categories: liquid superlubricity, solid superlubricity, solid–liquid combined superlubricity, and high-temperature superlubricity. By analyzing the superlubricity system, the mechanism of realizing various types of superlubricity, such as incommensurability, hydration, and oxidation, is summarized. Based on the research progress of superlubricity, the development prospects, opportunities, and challenges of superlubricity in the future are discussed. Full article
(This article belongs to the Special Issue Detection and Monitoring of Corrosion in Steel Structures)
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