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: closed (10 March 2024) | Viewed by 2096

Special Issue 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

Published Papers (2 papers)

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0 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 701
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
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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 2 | Viewed by 1125
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
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