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Coatings
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Smart Polymeric Coatings for Corrosion Mitigation
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Smart Polymeric Coatings for Corrosion Mitigation

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 December 2023) | Viewed by 3384

Special Issue Editor

Dr. Xiaolei Guo

E-Mail Website
Guest Editor
Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210, USA
Interests: corrosion; advanced manufacturing; materials informatics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Over the last two decades, interest has been growing in applying “smart coatings” in protecting against metal corrosion, owing to their capability of responding to a broad spectrum of environmental stimuli on demand, including temperature, pH, aggressive ions, heat, light, or mechanical stress. Polymers with diverse and tailorable functional groups are the perfect materials for such a purpose and therefore have been extensively explored. Organic or inorganic corrosion inhibitors are often embedded into the polymeric coating substrate either by direct dispersion or encapsulation, thereby allowing the metal substrate to self-heal upon corrosion damage. However, several challenges still exist in this actively developing area. For example, even after encapsulation in micro-/nanocarriers, highly soluble corrosion inhibitors can still leach from the coating substrate and create defects inside the smart coating, thereby undermining the long-term durability of the coating. Sophisticated approaches are also needed to create polymers with high compatibility with several highly effective organic/inorganic corrosion inhibitors. Therefore, the purpose of this Special Issue is to collect high-quality research or review articles focusing on smart polymeric coatings for corrosion mediation. We encourage researchers to publish their articles in this journal, providing their novel solutions to developing novel polymeric coatings and addressing some of the existing challenges.

We look forward to receiving your contributions.

Dr. Xiaolei Guo
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

  • active corrosion protection
  • encapsulation
  • functional polymers
  • smart coatings
  • self-healing

Published Papers (2 papers)

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Research

14 pages, 3894 KiB  
Article
Deposition and Characterisation of a Diamond/Ti/Diamond Multilayer Structure
by Awadesh Kumar Mallik, Fernando Lloret, Marina Gutierrez, Rozita Rouzbahani, Paulius Pobedinskas, Wen-Ching Shih and Ken Haenen
Coatings 2023, 13(11), 1914; https://doi.org/10.3390/coatings13111914 - 08 Nov 2023
Cited by 1 | Viewed by 970
Abstract
In this work, a diamond/Ti/diamond multilayer structure has been fabricated by successively following thin-film CVD and PVD routes. It has been found that a combined pre-treatment of the silicon base substrate, via argon plasma etching for creating surface roughness and, thereafter, detonation nanodiamond [...] Read more.
In this work, a diamond/Ti/diamond multilayer structure has been fabricated by successively following thin-film CVD and PVD routes. It has been found that a combined pre-treatment of the silicon base substrate, via argon plasma etching for creating surface roughness and, thereafter, detonation nanodiamond (DND) seeding, helps in the nucleation and growth of well-adherent CVD diamond films with a well-defined Raman signal at 1332 cm−1, showing the crystalline nature of the film. Ti sputtering on such a CVD-grown diamond surface leads to an imprinted bead-like microstructure of the titanium film, generated from the underlying diamond layer. The cross-sectional thickness of the titanium layer can be found to vary by as much as 0.5 µm across the length of the surface, which was caused by a subsequent hydrogen plasma etching process step of the composite film conducted after Ti sputtering. The hydrogen plasma etching of the Ti–diamond composite film was found to be essential for smoothening the uneven as-grown texture of the films, which was developed due to the unequal growth of the microcrystalline diamond columns. Such hydrogen plasma surface treatment helped further the nucleation and growth of a nanocrystalline diamond film as the top layer, which was deposited following a similar CVD route to that used in depositing the bottom diamond layer, albeit with different process parameters. For the latter, a hydrogen gas diluted with PH3 precursor recipe produced smaller nanocrystalline diamond crystals for the top layer. The titanium layer in between the two diamond layers possesses a very-fine-grained microstructure. Transmission electron microscopy (TEM) results show evidence of intermixing between the titanium and diamond layers at their respective interfaces. The thin films in the composite multilayer follow the contour of the plasma-etched silicon substrate and are thus useful in producing continuous protective coatings on 3D objects—a requirement for many engineering applications. Full article
(This article belongs to the Special Issue Smart Polymeric Coatings for Corrosion Mitigation)
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20 pages, 6354 KiB  
Article
Cure Kinetics of Commercial Epoxy-Amine Products with Iso-Conversional Methods
by Muhammad Ahsan Bashir
Coatings 2023, 13(3), 592; https://doi.org/10.3390/coatings13030592 - 09 Mar 2023
Cited by 2 | Viewed by 2032
Abstract
The dependence of the apparent activation energy for the epoxy-amine reaction on the degree of conversion can be obtained by applying iso-conversional methods to the non-isothermal cure data obtained by using differential scanning calorimetry (DSC). The application of three iso-conversional methods has been [...] Read more.
The dependence of the apparent activation energy for the epoxy-amine reaction on the degree of conversion can be obtained by applying iso-conversional methods to the non-isothermal cure data obtained by using differential scanning calorimetry (DSC). The application of three iso-conversional methods has been utilized for the analysis of non-isothermal DSC cure data for three commercial high solids epoxy-amine coatings. The average apparent activation energy for cure of the fully formulated commercial product(s) is very similar to that previously reported for the epoxy-amine clear coats, indicating that the presence of additives does not influence the epoxy-amine apparent activation energy. Among the methods tested, Friedman’s method performed the best in fitting the experimental DSC data. In addition, all three methods underpredict the experimental isothermal cure data for three commercial products at two different cure conditions (i.e., 23 °C/50% RH and 40 °C/70% RH), showing that the non-isothermal DSC experiments cannot capture the catalytic effect of water on the curing reaction of epoxy-amine coatings. Furthermore, for high-solids epoxy-amine products, at least 60% conversion is required to achieve the time when the applied coating will not show any tackiness (i.e., the T2 time measured using the Beck Koller method). Full article
(This article belongs to the Special Issue Smart Polymeric Coatings for Corrosion Mitigation)
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