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Article

Investigation of Accelerated Degradation Methods to Cause Blisters for Non-Defective Vinyl Ester Resin Glass Flake Organic Coatings

1
National Research Institute of Fire and Disaster, 4-35-3, Jindaiji-Higashimachi, Chofu, Tokyo 182-8508, Japan
2
Graduate School of Engineering, Yokohama National University, 79-5, Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
3
Japan Oil, Gas and Metals National Corporation, 10-1, Toranomon, 2-Chome Minato-ku, Tokyo 105-0001, Japan
*
Author to whom correspondence should be addressed.
Academic Editors: Claudio Mele and Csaba Balázsi
Coatings 2022, 12(1), 76; https://doi.org/10.3390/coatings12010076
Received: 22 November 2021 / Revised: 28 December 2021 / Accepted: 28 December 2021 / Published: 10 January 2022
Organic coatings are applied as a corrosion prevention measure, but their effectiveness may degrade over time. In this study, the acceleration effects of typical degradation methods in non-defective vinyl ester resin organic coatings containing glass flakes such as high-temperature immersion and immersion in chemical accelerators are clarified using physiochemical techniques. Immersion in an acetic acid (AcOH) aqueous solution causes resin swelling, and the behaviors are quantitatively evaluated through gravimetric, thickness, and electrochemical impedance spectroscopy (EIS) measurements. Furthermore, a combined process of immersion in hydrofluoric acid and an AcOH aqueous solution reduces the electrical properties and eventually blisters the thick coating surface. This result suggests that an appropriate combination of the resin swelling and the glass degradation (glass dissolution and/or formation of the gap between glass and resin) decrease mechanical properties of the glass flake coating and causes blisters. In order to help the health diagnosis of the visually non-defective aged glass flake coating, the relationship between the electrical characteristic values and the invisible degradation by accelerated tests is finally indicated. View Full-Text
Keywords: glass/polymer composite coating; accelerated degradation test; blisters; electrochemical impedance spectroscopy glass/polymer composite coating; accelerated degradation test; blisters; electrochemical impedance spectroscopy
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MDPI and ACS Style

Tokutake, K.; Okazaki, S.; Kodama, S. Investigation of Accelerated Degradation Methods to Cause Blisters for Non-Defective Vinyl Ester Resin Glass Flake Organic Coatings. Coatings 2022, 12, 76. https://doi.org/10.3390/coatings12010076

AMA Style

Tokutake K, Okazaki S, Kodama S. Investigation of Accelerated Degradation Methods to Cause Blisters for Non-Defective Vinyl Ester Resin Glass Flake Organic Coatings. Coatings. 2022; 12(1):76. https://doi.org/10.3390/coatings12010076

Chicago/Turabian Style

Tokutake, Koya, Shinji Okazaki, and Shintaro Kodama. 2022. "Investigation of Accelerated Degradation Methods to Cause Blisters for Non-Defective Vinyl Ester Resin Glass Flake Organic Coatings" Coatings 12, no. 1: 76. https://doi.org/10.3390/coatings12010076

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