Special Issue "Testing of Anticorrosion Coatings for Specific Industrial Applications"

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

Deadline for manuscript submissions: 20 March 2023 | Viewed by 2968

Special Issue Editor

Dr. Andrzej Miszczyk
E-Mail Website
Guest Editor
Department of Electrochemistry, Corrosion and Materials Engineering, Chemical Faculty, Gdańsk University of Technology, 11/12 Narutowicza St., 80-233 Gdansk, Poland
Interests: organic coatings in corrosion protection; multilayer coating systems; multifunctional coatings; degradation of organic coatings; application of impedance spectroscopy in the field of coating testing; anticorrosion pigments for coatings; use of chemometric methods in coating studies

Special Issue Information

Dear Colleagues,

The ultimate goal of research in the field of coating protection for metals is to translate the achievements of research into real industrial and infrastructure needs. This will always be the true measure of the value of our research. We need methods and tools to analyze the effectiveness of solutions in specific, often very aggressive industrial conditions.

People from the industry expect new and relatively simple solutions that will help them to ensure the continuous operation of devices and systems. With the numerous products of different companies available on the market, how can we check their suitability for specific conditions? We currently have a resource of modern research methods. In recent decades, for example, impedance spectroscopy has become widely available, with its use beginning to extend beyond the laboratory to real conditions. We also have tools to analyze large amounts of data, though it is still unclear how we can use these methods in analysis. The purpose of this Special Issue of Coatings is to serve as a platform for ‘brainstorming’ on these topics. I encourage you to share your achievements.

Topics of interest include but are not limited to:

  • New concepts and ideas for testing established or new coating products, in the laboratory but also in real industrial or infrastructural conditions;
  • Testing of high-performance coatings exposed to high temperatures, pressures, stresses, vibrations, and other extreme environmental conditions;
  • Understanding the mechanisms of degradation of coatings in industrial conditions, in the presence of friction, wear, vibration or other dynamic loads, and a chemical environment;
  • New test methods that take into account the interaction of mechanical, chemical, and electrochemical factors;
  • Accelerated performance testing of coatings and the relationship between the test data and field performance data to predict performance and reliability;
  • The use of new techniques for processing large amounts of data (big data analytics) to characterize the resistance of coatings in industrial conditions.

Dr. Andrzej Miszczyk
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 2200 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

  • anticorrosion coatings
  • industrial environments
  • testing in the field
  • reliability coatings

Published Papers (3 papers)

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Research

Article
Evaluating the Corrosion Inhibition Efficiency of Pyridinium-Based Cationic Surfactants for EN3B Mild Steel in Acidic-Chloride Media
Coatings 2022, 12(11), 1701; https://doi.org/10.3390/coatings12111701 - 08 Nov 2022
Viewed by 568
Abstract
Two new effective corrosion inhibitors, namely N-(n-octyl)-3-methylpyridinium bromide (Py8) and N-(n-dodecyl)-3-methylpyridinium bromide (Py12), have been presented. The cationic pyridinium-based surfactants were analyzed for the corrosion protection of general purpose steel (EN3B) against a strong corrosive media (3.5% NaCl, pH 1.5). The results of [...] Read more.
Two new effective corrosion inhibitors, namely N-(n-octyl)-3-methylpyridinium bromide (Py8) and N-(n-dodecyl)-3-methylpyridinium bromide (Py12), have been presented. The cationic pyridinium-based surfactants were analyzed for the corrosion protection of general purpose steel (EN3B) against a strong corrosive media (3.5% NaCl, pH 1.5). The results of the electrochemical measurements, i.e., Tafel polarization, linear polarization resistance (LPR) and electrochemical impedance spectroscopy (EIS) revealed a mixed-type behavior of both inhibitors, and the maximum inhibition efficiency (IE) achieved with Py8 and Py12 was 85% and 82%, respectively. The process of adsorption of synthesized inhibitors followed the Langmuir adsorption isotherm, and a higher value of Kads highlighted the existence of strong interaction between inhibitors and the EN3B mild steel surface. Furthermore, the values of Δads were calculated to be −32 kJ mol−1 for Py8 and −33 kJ mol−1 for Py12, indicating the coexistence of both physisorbed and chemisorbed molecules. The surface morphology of EN3B mild steel samples was observed by scanning electron microscopy (SEM) and atomic force microscopy (AFM), where the reduced surface roughness in the presence of Py8 and Py12 in chloride media further supported the evidence of an efficient inhibition process. Density functional theory (DFT) calculations reveal excellent correlation with the experimental results, with Py8 showing superior corrosion inhibition potential, signifying that the alkyl chain length and intramolecular charge transfer are crucial factors in deciding the inhibition performance of the synthesized cationic surfactants. Furthermore, this study proposes the mechanism for the adsorption of the surfactant-based inhibitors over the EN3B mild steel surface, which leads to the formation of an effective and protective anticorrosive film. Full article
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Article
Neural-Network-Based Ultrasonic Inspection of Offshore Coated Concrete Specimens
Coatings 2022, 12(6), 773; https://doi.org/10.3390/coatings12060773 - 04 Jun 2022
Cited by 1 | Viewed by 910
Abstract
A thin layer of protective coating material is applied on the surface of offshore concrete structures to prevent its degradation, thereby extending the useful life of the structures. The main reasons for the reduction in the protective capability of coating layers are loss [...] Read more.
A thin layer of protective coating material is applied on the surface of offshore concrete structures to prevent its degradation, thereby extending the useful life of the structures. The main reasons for the reduction in the protective capability of coating layers are loss of adhesion to concrete and flattening of the coating layer wall. Usually, the state of the coating layer is monitored in the setting of water immersion using ultrasonic inspection methods, and the method of inspection still needs improvement in terms of speed and accuracy. In this study, the ultrasonic pulse echo method was used in a water immersion test of the coated specimens, and continuous wavelet transform (CWT) with complex Morlet wavelets was implemented to define the received waveforms’ time of flight and instantaneous center frequency. These allow one to evaluate the thickness of the coating layer during water immersion. Furthermore, phases of reflected echoes at CWT local peaks were computed using a combination of Hilbert transforms (HT) and wave parameters derived from CWT. In addition, three relative wave parameters of echoes were also used to train deep neural networks (DNN), including instantaneous center frequency ratio, CWT magnitude ratio, and phase difference. With the use of three relative waveform parameters of the DNN, the debonded layer detection accuracy of our method was 100%. Full article
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Article
Selection of Organic Coating Systems for Corrosion Protection of Industrial Equipment
Coatings 2022, 12(4), 523; https://doi.org/10.3390/coatings12040523 - 13 Apr 2022
Cited by 1 | Viewed by 954
Abstract
The most important element of corrosion protection in industrial conditions is the protective coating system. However, selecting the right coating can often be a real problem due to the sheer number of coating manufacturers and their products on the market. A quantitative approach [...] Read more.
The most important element of corrosion protection in industrial conditions is the protective coating system. However, selecting the right coating can often be a real problem due to the sheer number of coating manufacturers and their products on the market. A quantitative approach based on the data mining technique used to analyze the obtained multi-site exposure data has been proposed. This was demonstrated by the example of the selection of a coating system to protect an industrial ball mill located in a hall for the enrichment of copper ore at the Polish company KGHM Polska Miedz S.A. A collection of 21 two-layer coating systems from different manufacturers was tested for one year. Multiple areas on the industrial ball mill, subjected to varying degrees of vibrations and abrasion, were painted. In addition, sets of samples that can be detached from the mill housing were mounted, as well as the set exposed in the hall without vibrations. The condition of the coatings after exposure was assessed using impedance spectroscopy. The obtained data from many different exposure areas were analyzed using principal components analysis (PCA). In this way, the most advantageous coating systems for the specific conditions in the hall were indicated. Additionally, on this basis, the contribution of various destructive factors, including vibrations and abrasion, to the protective properties of the tested coatings, was estimated. Full article
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