Thermodynamic Aspects of Coating Preparation, Especially for Corrosion Protection

A special issue of Coatings (ISSN 2079-6412).

Deadline for manuscript submissions: closed (30 June 2022) | Viewed by 2773

Special Issue Editors


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Guest Editor
Department of Mechanical Engineering, Faculty of Technology, Institute of Technology and Business in České Budějovice, Okružní 10, 370 01 České Budějovice, Czech Republic
Interests: applied physics/thermodynamics; measurements/analysis and interpretation of measurement results; creation of physical–mathematical models for the description of technological processes
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Co-Guest Editor
1. Institute of Electrical Engineering, Automation, Informatics and Physics, Faculty of Engineering, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
2. Institute of Technology and Business in České Budějovice, Okružní 10, 370 01 České Budějovice, Czech Republic
Interests: modelling; materials; surface engineering; mechanical parameters; neural networks
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The thermodynamic aspects of coating preparation are specific and challenging issues for many reasons. In most coating depositions, the energy fluxes carried by the particles to the coating site are extremely high, and the process is extremely fast and takes place under a state of significant temperature rise and considerable thermodynamic imbalance. The properties of such types of coatings also differ significantly from the properties of the same material in a large volume. In practice, the required properties of the prepared coating are most often only estimated on the basis of empirical and experimentally obtained knowledge. An important contribution to the targeted research of coating preparation is the thermodynamic aspect, especially with regard to the thermodynamics of thin, super-thin, hard, and super-hard layers. The technologically set temperature does not correspond to the temperature distribution in the applied layers; therefore, the study of enthalpy/entropy for different types of coatings on different types of substrates and with different depositions can help to predict and solve the main coating problems. For this Special Issue of Coatings, contributions will be welcome on both theoretical thermodynamics and experimental works dealing with the measurement of the temperature dependencies of coating formation. Works focused on researching tool coatings resistant to extreme temperatures and friction with the formation and propagation of thermal fatigue cracks are also considered very beneficial. Thermodynamically unstable state is the primary cause of corrosion for most metals. Thermodynamics also provides important information about the course of spontaneous corrosion process, it can predict whether the reaction will take place under given conditions.

Potential topics for this Special Issue are as follows:

  • Research of the thermodynamic properties of layers (especially of thin, super-thin, hard, and super-hard layers);
  • Research of enthalpy/entropy for different types of coatings;
  • Research on tool coatings resistant to extreme temperatures;
  • Measurement of the temperature dependencies of coating formation;
  • Thermodynamic aspects of corrosion;
  • Thermodynamic conditions of the formation of anticorrosive coatings.

Dr. Milena Kušnerová
Dr. Marta Harničárová
Guest Editors

Manuscript Submission Information

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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.

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Keywords

  • thermodynamics
  • coating preparation
  • layers
  • enthalpy/entropy

Published Papers (1 paper)

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Research

14 pages, 5073 KiB  
Article
Study of Intumescent Coatings Growth for Fire Retardant Systems in Naval Applications: Experimental Test and Mathematical Model
by Elpida Piperopoulos, Gabriele Grifò, Giuseppe Scionti, Mario Atria, Luigi Calabrese, Giancarlo Consolo and Edoardo Proverbio
Coatings 2022, 12(8), 1180; https://doi.org/10.3390/coatings12081180 - 15 Aug 2022
Cited by 7 | Viewed by 2081
Abstract
Onboard ships, fire is one of the most dangerous events that can occur. For both military and commercial ships, fire risks are the most worrying; for this reason they have an important impact on the design of the vessel. The intumescent coatings react [...] Read more.
Onboard ships, fire is one of the most dangerous events that can occur. For both military and commercial ships, fire risks are the most worrying; for this reason they have an important impact on the design of the vessel. The intumescent coatings react when heated or in contact with a living flame, and a multi-layered insulating structure grows up, protecting the underlying structure. In this concern, the aim of the paper is to evaluate the intumescent capacity of different composite coatings coupling synergistically modeling and experimental tests. In particular, the experiments have been carried out on a new paint formulation, developed by Colorificio Atria S.r.l., in which the active components are ammonium polyphosphate or pentaerythritol. The specimens were exposed to a gas-torch flame for about 70 s. The degree of thermal insulation of the coating was monitored by means of a thermocouple placed on the back of the sample. In order to get insights into the intumescent mechanism, experimental data was compared with the results of a mathematical model and a good agreement is detected. Furthermore, a predictive model on the swelling rate is addressed. The results highlight that all coatings exhibit a clear intumescent and barrier capacity. The best results were observed for coating enhanced with NH4PO3 where a regular and thick, porous char was formed during exposure to direct flame. Full article
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