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Temporary Inhibition of the Corrosion of AZ31B Magnesium Alloy by Formation of Bacillus subtilis Biofilm in Artificial Seawater

It is well known that microorganisms tend to form biofilms on metal surfaces to accelerate/decelerate corrosion and affect their service life. Bacillus subtilis was used to produce a dense biofilm on an AZ31B magnesium alloy surface. Corrosion behavior of the alloy with the B. subtilis biofilm was e...

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Autores principales: Kang, Yaxin, Li, Lei, Li, Shunling, Zhou, Xin, Xia, Ke, Liu, Chang, Qu, Qing
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6384576/
https://www.ncbi.nlm.nih.gov/pubmed/30744166
http://dx.doi.org/10.3390/ma12030523
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author Kang, Yaxin
Li, Lei
Li, Shunling
Zhou, Xin
Xia, Ke
Liu, Chang
Qu, Qing
author_facet Kang, Yaxin
Li, Lei
Li, Shunling
Zhou, Xin
Xia, Ke
Liu, Chang
Qu, Qing
author_sort Kang, Yaxin
collection PubMed
description It is well known that microorganisms tend to form biofilms on metal surfaces to accelerate/decelerate corrosion and affect their service life. Bacillus subtilis was used to produce a dense biofilm on an AZ31B magnesium alloy surface. Corrosion behavior of the alloy with the B. subtilis biofilm was evaluated in artificial seawater. The results revealed that the biofilm hampered extracellular electron transfer significantly, which resulted in a decrease of i(corr) and increase of R(t) clearly compared to the control group. Moreover, an ennoblement of E(corr) was detected under the condition of B. subtilis biofilm covering. Significant reduction of the corrosion was observed by using the cyclic polarization method. All of these prove that the existence of the B. subtilis biofilm effectively enhances the anti-corrosion performance of the AZ31B magnesium alloy. This result may enhance the usage of bio-interfaces for temporary corrosion control. In addition, a possible corrosion inhibition mechanism of B. subtilis on AZ31B magnesium alloy was proposed.
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spelling pubmed-63845762019-02-23 Temporary Inhibition of the Corrosion of AZ31B Magnesium Alloy by Formation of Bacillus subtilis Biofilm in Artificial Seawater Kang, Yaxin Li, Lei Li, Shunling Zhou, Xin Xia, Ke Liu, Chang Qu, Qing Materials (Basel) Article It is well known that microorganisms tend to form biofilms on metal surfaces to accelerate/decelerate corrosion and affect their service life. Bacillus subtilis was used to produce a dense biofilm on an AZ31B magnesium alloy surface. Corrosion behavior of the alloy with the B. subtilis biofilm was evaluated in artificial seawater. The results revealed that the biofilm hampered extracellular electron transfer significantly, which resulted in a decrease of i(corr) and increase of R(t) clearly compared to the control group. Moreover, an ennoblement of E(corr) was detected under the condition of B. subtilis biofilm covering. Significant reduction of the corrosion was observed by using the cyclic polarization method. All of these prove that the existence of the B. subtilis biofilm effectively enhances the anti-corrosion performance of the AZ31B magnesium alloy. This result may enhance the usage of bio-interfaces for temporary corrosion control. In addition, a possible corrosion inhibition mechanism of B. subtilis on AZ31B magnesium alloy was proposed. MDPI 2019-02-10 /pmc/articles/PMC6384576/ /pubmed/30744166 http://dx.doi.org/10.3390/ma12030523 Text en © 2019 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Kang, Yaxin
Li, Lei
Li, Shunling
Zhou, Xin
Xia, Ke
Liu, Chang
Qu, Qing
Temporary Inhibition of the Corrosion of AZ31B Magnesium Alloy by Formation of Bacillus subtilis Biofilm in Artificial Seawater
title Temporary Inhibition of the Corrosion of AZ31B Magnesium Alloy by Formation of Bacillus subtilis Biofilm in Artificial Seawater
title_full Temporary Inhibition of the Corrosion of AZ31B Magnesium Alloy by Formation of Bacillus subtilis Biofilm in Artificial Seawater
title_fullStr Temporary Inhibition of the Corrosion of AZ31B Magnesium Alloy by Formation of Bacillus subtilis Biofilm in Artificial Seawater
title_full_unstemmed Temporary Inhibition of the Corrosion of AZ31B Magnesium Alloy by Formation of Bacillus subtilis Biofilm in Artificial Seawater
title_short Temporary Inhibition of the Corrosion of AZ31B Magnesium Alloy by Formation of Bacillus subtilis Biofilm in Artificial Seawater
title_sort temporary inhibition of the corrosion of az31b magnesium alloy by formation of bacillus subtilis biofilm in artificial seawater
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6384576/
https://www.ncbi.nlm.nih.gov/pubmed/30744166
http://dx.doi.org/10.3390/ma12030523
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