Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Hao, Xiangping, Yang, Kexin, Yuan, Yiding, Zhang, Dawei, Lu, Lin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
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
_version_ 1784896447041241088
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
work_keys_str_mv AT haoxiangping investigatingdifferentlocalpolyurethanecoatingsdegradationeffectsandcorrosionbehaivorsbytalaromycesfuniculosusviawirebeamelectrodes
AT yangkexin investigatingdifferentlocalpolyurethanecoatingsdegradationeffectsandcorrosionbehaivorsbytalaromycesfuniculosusviawirebeamelectrodes
AT yuanyiding investigatingdifferentlocalpolyurethanecoatingsdegradationeffectsandcorrosionbehaivorsbytalaromycesfuniculosusviawirebeamelectrodes
AT zhangdawei investigatingdifferentlocalpolyurethanecoatingsdegradationeffectsandcorrosionbehaivorsbytalaromycesfuniculosusviawirebeamelectrodes
AT lulin investigatingdifferentlocalpolyurethanecoatingsdegradationeffectsandcorrosionbehaivorsbytalaromycesfuniculosusviawirebeamelectrodes