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Research Progress on Coatings Degradation and Atmospheric Corrosion of Metal...
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Research Progress on Coatings Degradation and Atmospheric Corrosion of Metal Surfaces

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

Deadline for manuscript submissions: 30 December 2024 | Viewed by 4547

Special Issue Editor

Dr. Steven A. Policastro

E-Mail Website
Guest Editor
Center for Corrosion Science and Engineering, U.S. Naval Research Laboratory, Washington, DC 20375, USA
Interests: physics-based models of coatings degradation and atmospheric corrosion of aircraft and marine materials

Special Issue Information

Dear Colleagues,

Coatings and coating systems are frequently the first line of defense against corrosion for metals and alloys; this is especially the case in atmospheric corrosion scenarios because of the limited ability to provide for cathodic protection. However, exposure to the service environment causes ageing and degradation to the protective coatings themselves. The need to develop a new understanding of organic and inorganic coating degradation in various exposure environments so that predictions of coating protection can be made is driving new advances in experimental activities and modeling capabilities.

We hope that this Special Issue will serve as a forum for original research articles and reviews that are inclusive of—but not limited to—the following areas:

  • Theoretical and experimental research on changes in the mechanical and visual properties of coatings, especially under atmospheric exposure conditions.
  • Theoretical and experimental research on methods for evaluating the state of a coating.
  • Theoretical and experimental research on mechanisms of coating degradation through environmental exposure and loading conditions.
  • Computer modeling and simulations that can predict coating properties, performance, durability and reliability in service environments.
  • Experimental and theoretical research on accelerated test methods for predicting coating performance and reliability that incorporate physical, chemical, and electrochemical interactions, with an emphasis on relating test techniques with field performance data.

We look forward to receiving your contributions!

Dr. Steven A. Policastro
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

  • organic coatings
  • inorganic coatings
  • modeling and simulation of coating degradation
  • accelerated test methods
  • atmospheric corrosion
  • coating performance prediction
  • marine coatings

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Further information on MDPI's Special Issue polices can be found here.

Published Papers (3 papers)

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Research

14 pages, 5157 KiB  
Article
Research on the Optimal Protection Parameters of Graphene Composite Conductive Coatings Combined with Impressed Current Cathodic Protection Technology in Marine Atmospheric Environments
by Jiezhen Hu, Dahai Liu, Peichang Deng, Juyu Shangguan, Guo Zheng and Jingrong Yang
Coatings 2024, 14(10), 1263; https://doi.org/10.3390/coatings14101263 - 1 Oct 2024
Viewed by 763
Abstract
Based on the principle of a micropore-filling electrolyte, a graphene composite conductive coating combined with impressed current cathodic protection (ICCP) technology was constructed and applied in a marine atmospheric environment. To further explore the optimal protection parameters of the graphene composite conductive coating [...] Read more.
Based on the principle of a micropore-filling electrolyte, a graphene composite conductive coating combined with impressed current cathodic protection (ICCP) technology was constructed and applied in a marine atmospheric environment. To further explore the optimal protection parameters of the graphene composite conductive coating combined with ICCP technology in a marine atmospheric environment, the effects of the coating damage area (A), impressed voltage (B), and distance from the contact point (C) on the protective performance of the coating were investigated via orthogonal experiments. The optimal protection voltage and effective protection distance were verified by super-depth-of-field morphology observations and electrochemical tests. The orthogonal experimental results show that the primary and secondary orders affecting the protective performance of the conductive graphene composite coating are as follows: applied voltage (B) > coating damage area (A) > distance from the point of contact (C). The optimal protective parameters of the coating in the marine atmospheric environment are an applied voltage of 0.7 V, a damage rate of ≤1%, and a distance from the point of contact of 190 mm. The experimental results show that the corrosion potential of the sample is the highest under an applied voltage of 0.7 V, and the corrosion products do not diffuse to the surface of the coating. When the polarization resistance (Rp) values at 110 mm and 190 mm from the negative electrode at the point of contact are greater, the corrosion rate is lower, and the coating protection performance is better. Full article
(This article belongs to the Special Issue Research Progress on Coatings Degradation and Atmospheric Corrosion of Metal Surfaces)
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18 pages, 9818 KiB  
Article
Tensile Properties of Aircraft Coating Systems and Applied Strain Modeling
by Attilio Arcari, Rachel M. Anderson, Carlos M. Hangarter, Erick B. Iezzi and Steven A. Policastro
Coatings 2024, 14(1), 91; https://doi.org/10.3390/coatings14010091 - 10 Jan 2024
Viewed by 1195
Abstract
In this work, we develop a structural model for the fracturing of an aircraft coating system applied to a complex airframe structure that includes aluminum panels and stainless-steel fasteners. The mechanical properties of the coating system, which consisted of an MIL-PRF-85582E, Type II, [...] Read more.
In this work, we develop a structural model for the fracturing of an aircraft coating system applied to a complex airframe structure that includes aluminum panels and stainless-steel fasteners. The mechanical properties of the coating system, which consisted of an MIL-PRF-85582E, Type II, Class C1, two-part epoxy primer and an MIL-PRF-85285 Rev E, Type IV, Class H, two-part polyurethane topcoat, were measured before and after 8 months of atmospheric exposure. The loads applied to the coating occurred from local deformations of the fastener-panel system in response to flight stresses. Two types of flight stresses, compression dominated and tension dominated, were modeled. The degradation of the mechanical properties of the coating after atmospheric exposure increases the severity of cracking of the coating at a critical fastener–skin interface. Full article
(This article belongs to the Special Issue Research Progress on Coatings Degradation and Atmospheric Corrosion of Metal Surfaces)
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27 pages, 10706 KiB  
Article
Incorporating Physics-Based Models into Equivalent Circuit Analysis of EIS Data from Organic Coatings
by Steven A. Policastro, Rachel M. Anderson, Carlos M. Hangarter, Attilio Arcari and Erick B. Iezzi
Coatings 2023, 13(7), 1285; https://doi.org/10.3390/coatings13071285 - 22 Jul 2023
Cited by 8 | Viewed by 2053
Abstract
Electrochemical impedance spectroscopy (EIS) is a widely used method for monitoring coatings because it can be done in situ and causes little damage to the coating. However, interpreting the impedance data from coatings in order to determine the state of the coating and [...] Read more.
Electrochemical impedance spectroscopy (EIS) is a widely used method for monitoring coatings because it can be done in situ and causes little damage to the coating. However, interpreting the impedance data from coatings in order to determine the state of the coating and its protective abilities is challenging. A modified version of the rapid electrochemical assessment of paint (REAP) equivalent circuit is developed here, along with a method to calculate the impedance of a circuit using matrix algebra. This new equivalent circuit and the calculation method are used to analyze EIS data obtained from a two-layer commercial organic coating system immersed in NaCl solutions with different concentrations and at different temperatures. The matrix calculation method is validated by comparing results obtained from commercial analysis software to this method for two different equivalent circuits, and the parameter values are nearly equal. Physics-based models of the equivalent circuit elements are derived and used to obtain both initial estimates for the regressions and physics-based constraints on the model parameters. These models are integrated into the regression procedure, and the corrected Akaike information criterion (AICc) is used to compare fits between the new circuit and classic equivalent circuits. The AICc values indicate the new circuit results in better fits than classic equivalent circuits used for coatings analysis. Full article
(This article belongs to the Special Issue Research Progress on Coatings Degradation and Atmospheric Corrosion of Metal Surfaces)
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