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Investigating Different Local Polyurethane Coatings Degradation Effects and Corrosion Behaivors by Talaromyces funiculosus via Wire Beam Electrodes
The degradation effect of mold on the coating in a hot and humid environment is one of the important factors that cause layer failure. Combined with the wire beam electrode (WBE) and the traditional surface analysis technique, the local biodegradation of the coatings and the corrosion behaviors of m...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9964212/ https://www.ncbi.nlm.nih.gov/pubmed/36837032 http://dx.doi.org/10.3390/ma16041402 |
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author | Hao, Xiangping Yang, Kexin Yuan, Yiding Zhang, Dawei Lu, Lin |
author_facet | Hao, Xiangping Yang, Kexin Yuan, Yiding Zhang, Dawei Lu, Lin |
author_sort | Hao, Xiangping |
collection | PubMed |
description | The degradation effect of mold on the coating in a hot and humid environment is one of the important factors that cause layer failure. Combined with the wire beam electrode (WBE) and the traditional surface analysis technique, the local biodegradation of the coatings and the corrosion behaviors of metal substrates can be characterized accurately by a WBE. Herein, a WBE was used to study the degradation impact of Talaromyces funiculosus (T. funiculosus) isolated from a tropical rainforest environment on the corrosion of polyurethane (PU) coating. After immersion for 14 days, the local current density distribution of the WBE surface can reach ~10(−3) A/cm(2) in the fungal liquid mediums but maintains ~10(−7) A/cm(2) in sterile liquid mediums. The |Z|(0.01Hz) value of the high current densities area (#85 electrode) was 1.06 × 10(9) Ω cm(2) in a fungal liquid medium after 14 days of immersion. After being attacked by T. funiculosus, the degradation of the PU was more severe, and there were wrinkles, cracks, blisters, and even micro-holes distributed randomly on the surface of electrodes. This resulted from the self-corrosion caused by the T. funiculosus degradation of the coating; the corrosion caused by the electric coupling effect of the coating was introduced. Energy dispersive spectroscopy (EDS) and Raman spectra results showed that the corrosion products were flakey and globular, which consisted of γ-FeOOH, γ-Fe(2)O(3), and α-FeOOH. |
format | Online Article Text |
id | pubmed-9964212 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-99642122023-02-26 Investigating Different Local Polyurethane Coatings Degradation Effects and Corrosion Behaivors by Talaromyces funiculosus via Wire Beam Electrodes Hao, Xiangping Yang, Kexin Yuan, Yiding Zhang, Dawei Lu, Lin Materials (Basel) Article The degradation effect of mold on the coating in a hot and humid environment is one of the important factors that cause layer failure. Combined with the wire beam electrode (WBE) and the traditional surface analysis technique, the local biodegradation of the coatings and the corrosion behaviors of metal substrates can be characterized accurately by a WBE. Herein, a WBE was used to study the degradation impact of Talaromyces funiculosus (T. funiculosus) isolated from a tropical rainforest environment on the corrosion of polyurethane (PU) coating. After immersion for 14 days, the local current density distribution of the WBE surface can reach ~10(−3) A/cm(2) in the fungal liquid mediums but maintains ~10(−7) A/cm(2) in sterile liquid mediums. The |Z|(0.01Hz) value of the high current densities area (#85 electrode) was 1.06 × 10(9) Ω cm(2) in a fungal liquid medium after 14 days of immersion. After being attacked by T. funiculosus, the degradation of the PU was more severe, and there were wrinkles, cracks, blisters, and even micro-holes distributed randomly on the surface of electrodes. This resulted from the self-corrosion caused by the T. funiculosus degradation of the coating; the corrosion caused by the electric coupling effect of the coating was introduced. Energy dispersive spectroscopy (EDS) and Raman spectra results showed that the corrosion products were flakey and globular, which consisted of γ-FeOOH, γ-Fe(2)O(3), and α-FeOOH. MDPI 2023-02-07 /pmc/articles/PMC9964212/ /pubmed/36837032 http://dx.doi.org/10.3390/ma16041402 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Hao, Xiangping Yang, Kexin Yuan, Yiding Zhang, Dawei Lu, Lin Investigating Different Local Polyurethane Coatings Degradation Effects and Corrosion Behaivors by Talaromyces funiculosus via Wire Beam Electrodes |
title | Investigating Different Local Polyurethane Coatings Degradation Effects and Corrosion Behaivors by Talaromyces funiculosus via Wire Beam Electrodes |
title_full | Investigating Different Local Polyurethane Coatings Degradation Effects and Corrosion Behaivors by Talaromyces funiculosus via Wire Beam Electrodes |
title_fullStr | Investigating Different Local Polyurethane Coatings Degradation Effects and Corrosion Behaivors by Talaromyces funiculosus via Wire Beam Electrodes |
title_full_unstemmed | Investigating Different Local Polyurethane Coatings Degradation Effects and Corrosion Behaivors by Talaromyces funiculosus via Wire Beam Electrodes |
title_short | Investigating Different Local Polyurethane Coatings Degradation Effects and Corrosion Behaivors by Talaromyces funiculosus via Wire Beam Electrodes |
title_sort | investigating different local polyurethane coatings degradation effects and corrosion behaivors by talaromyces funiculosus via wire beam electrodes |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9964212/ https://www.ncbi.nlm.nih.gov/pubmed/36837032 http://dx.doi.org/10.3390/ma16041402 |
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