Cargando…

Nitrite producing bacteria inhibit reinforcement bar corrosion in cementitious materials

Chemicals and synthetic coatings are widely used to protect steel against corrosion. Bio-based corrosion inhibition strategies can be an alternative in the arising bioeconomy era. To maintain the good state of steel reinforcement in cracked concrete, microbe-based self-healing cementitious composite...

Descripción completa

Detalles Bibliográficos
Autores principales: Erşan, Yusuf Çağatay, Van Tittelboom, Kim, Boon, Nico, De Belie, Nele
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6148264/
https://www.ncbi.nlm.nih.gov/pubmed/30237506
http://dx.doi.org/10.1038/s41598-018-32463-6
_version_ 1783356729170329600
author Erşan, Yusuf Çağatay
Van Tittelboom, Kim
Boon, Nico
De Belie, Nele
author_facet Erşan, Yusuf Çağatay
Van Tittelboom, Kim
Boon, Nico
De Belie, Nele
author_sort Erşan, Yusuf Çağatay
collection PubMed
description Chemicals and synthetic coatings are widely used to protect steel against corrosion. Bio-based corrosion inhibition strategies can be an alternative in the arising bioeconomy era. To maintain the good state of steel reinforcement in cracked concrete, microbe-based self-healing cementitious composites (MSCC) have been developed. Yet, proposed strategies involve reasonably slow crack filling by biomineralization and thus risk the possible rebar corrosion during crack healing. Here we upgrade the rebar protection to a higher level by combining MSCC with microbial induced corrosion inhibition. Presented NO(3)(−) reducing bacterial granules inhibit rebar corrosion by producing the anodic corrosion inhibitor NO(2)(−) and meanwhile heal a 300-µm-wide crack in 28 days. During 120 days exposure to 0.5 M Cl(−) solution, the rebars in cracked MSCC keep showing open circuit potentials above the critical value of −250 mV and they lose less than 2% of the total rebar material which corresponds to half the material loss in cracked plain mortar. Overall, the obtained rebar protection performance is comparable with that of uncracked mortar and mortar containing chemical inhibitor, hence the microbe-based system becomes an alternative to the traditional methods.
format Online
Article
Text
id pubmed-6148264
institution National Center for Biotechnology Information
language English
publishDate 2018
publisher Nature Publishing Group UK
record_format MEDLINE/PubMed
spelling pubmed-61482642019-02-12 Nitrite producing bacteria inhibit reinforcement bar corrosion in cementitious materials Erşan, Yusuf Çağatay Van Tittelboom, Kim Boon, Nico De Belie, Nele Sci Rep Article Chemicals and synthetic coatings are widely used to protect steel against corrosion. Bio-based corrosion inhibition strategies can be an alternative in the arising bioeconomy era. To maintain the good state of steel reinforcement in cracked concrete, microbe-based self-healing cementitious composites (MSCC) have been developed. Yet, proposed strategies involve reasonably slow crack filling by biomineralization and thus risk the possible rebar corrosion during crack healing. Here we upgrade the rebar protection to a higher level by combining MSCC with microbial induced corrosion inhibition. Presented NO(3)(−) reducing bacterial granules inhibit rebar corrosion by producing the anodic corrosion inhibitor NO(2)(−) and meanwhile heal a 300-µm-wide crack in 28 days. During 120 days exposure to 0.5 M Cl(−) solution, the rebars in cracked MSCC keep showing open circuit potentials above the critical value of −250 mV and they lose less than 2% of the total rebar material which corresponds to half the material loss in cracked plain mortar. Overall, the obtained rebar protection performance is comparable with that of uncracked mortar and mortar containing chemical inhibitor, hence the microbe-based system becomes an alternative to the traditional methods. Nature Publishing Group UK 2018-09-20 /pmc/articles/PMC6148264/ /pubmed/30237506 http://dx.doi.org/10.1038/s41598-018-32463-6 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Erşan, Yusuf Çağatay
Van Tittelboom, Kim
Boon, Nico
De Belie, Nele
Nitrite producing bacteria inhibit reinforcement bar corrosion in cementitious materials
title Nitrite producing bacteria inhibit reinforcement bar corrosion in cementitious materials
title_full Nitrite producing bacteria inhibit reinforcement bar corrosion in cementitious materials
title_fullStr Nitrite producing bacteria inhibit reinforcement bar corrosion in cementitious materials
title_full_unstemmed Nitrite producing bacteria inhibit reinforcement bar corrosion in cementitious materials
title_short Nitrite producing bacteria inhibit reinforcement bar corrosion in cementitious materials
title_sort nitrite producing bacteria inhibit reinforcement bar corrosion in cementitious materials
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6148264/
https://www.ncbi.nlm.nih.gov/pubmed/30237506
http://dx.doi.org/10.1038/s41598-018-32463-6
work_keys_str_mv AT ersanyusufcagatay nitriteproducingbacteriainhibitreinforcementbarcorrosionincementitiousmaterials
AT vantittelboomkim nitriteproducingbacteriainhibitreinforcementbarcorrosionincementitiousmaterials
AT boonnico nitriteproducingbacteriainhibitreinforcementbarcorrosionincementitiousmaterials
AT debelienele nitriteproducingbacteriainhibitreinforcementbarcorrosionincementitiousmaterials