Corrosion behavior and mechanism of ductile iron with different degrees of deterioration of cement mortar lining in reclaimed water pipelines
The deterioration of cement mortar lining (CML) has a significant impact on the corrosion of ductile iron pipes, and further affects the water quality of transported reclaimed water. In this study, the different coverage levels of CML (such as lined (100%), 90% and 50% lining coverage and unlined) w...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9057434/ https://www.ncbi.nlm.nih.gov/pubmed/35515357 http://dx.doi.org/10.1039/d0ra08042j |
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author | Liu, Yunhui Tian, Yimei Zhang, Rufang Guo, Hao Zhao, Weigao Huang, Jianjun |
author_facet | Liu, Yunhui Tian, Yimei Zhang, Rufang Guo, Hao Zhao, Weigao Huang, Jianjun |
author_sort | Liu, Yunhui |
collection | PubMed |
description | The deterioration of cement mortar lining (CML) has a significant impact on the corrosion of ductile iron pipes, and further affects the water quality of transported reclaimed water. In this study, the different coverage levels of CML (such as lined (100%), 90% and 50% lining coverage and unlined) were used for simulating different degrees of deterioration of CML. Electrochemical measurements, water quality testing and corrosion product microanalysis were carried out to monitor the corrosion process and investigate the corrosion mechanism. The results showed that the order of maximum corrosion rate under different conditions was: 50% lining coverage (0.159 mm a(−1)) > unlined (0.110 mm a(−1)) > 90% lining coverage (0.042 mm a(−1)) > 100% lining coverage (0.007 mm a(−1)). The complete lining can provide a higher pH to passivate the ductile iron to achieve perfect protection. When the damage of CML was very small, the self-healing of the lining can restore the protection ability to a great extent. The corrosion of the ductile iron with 50% lining was even more serious than the unlined ductile iron. The negative effect of the silicate dissolved from the lining on the crystal structure, growth and stabilization process of the corrosion products was considered to be the reason for the more acute corrosion of the pipeline with a large area lining spalling. |
format | Online Article Text |
id | pubmed-9057434 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-90574342022-05-04 Corrosion behavior and mechanism of ductile iron with different degrees of deterioration of cement mortar lining in reclaimed water pipelines Liu, Yunhui Tian, Yimei Zhang, Rufang Guo, Hao Zhao, Weigao Huang, Jianjun RSC Adv Chemistry The deterioration of cement mortar lining (CML) has a significant impact on the corrosion of ductile iron pipes, and further affects the water quality of transported reclaimed water. In this study, the different coverage levels of CML (such as lined (100%), 90% and 50% lining coverage and unlined) were used for simulating different degrees of deterioration of CML. Electrochemical measurements, water quality testing and corrosion product microanalysis were carried out to monitor the corrosion process and investigate the corrosion mechanism. The results showed that the order of maximum corrosion rate under different conditions was: 50% lining coverage (0.159 mm a(−1)) > unlined (0.110 mm a(−1)) > 90% lining coverage (0.042 mm a(−1)) > 100% lining coverage (0.007 mm a(−1)). The complete lining can provide a higher pH to passivate the ductile iron to achieve perfect protection. When the damage of CML was very small, the self-healing of the lining can restore the protection ability to a great extent. The corrosion of the ductile iron with 50% lining was even more serious than the unlined ductile iron. The negative effect of the silicate dissolved from the lining on the crystal structure, growth and stabilization process of the corrosion products was considered to be the reason for the more acute corrosion of the pipeline with a large area lining spalling. The Royal Society of Chemistry 2020-10-29 /pmc/articles/PMC9057434/ /pubmed/35515357 http://dx.doi.org/10.1039/d0ra08042j Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/ |
spellingShingle | Chemistry Liu, Yunhui Tian, Yimei Zhang, Rufang Guo, Hao Zhao, Weigao Huang, Jianjun Corrosion behavior and mechanism of ductile iron with different degrees of deterioration of cement mortar lining in reclaimed water pipelines |
title | Corrosion behavior and mechanism of ductile iron with different degrees of deterioration of cement mortar lining in reclaimed water pipelines |
title_full | Corrosion behavior and mechanism of ductile iron with different degrees of deterioration of cement mortar lining in reclaimed water pipelines |
title_fullStr | Corrosion behavior and mechanism of ductile iron with different degrees of deterioration of cement mortar lining in reclaimed water pipelines |
title_full_unstemmed | Corrosion behavior and mechanism of ductile iron with different degrees of deterioration of cement mortar lining in reclaimed water pipelines |
title_short | Corrosion behavior and mechanism of ductile iron with different degrees of deterioration of cement mortar lining in reclaimed water pipelines |
title_sort | corrosion behavior and mechanism of ductile iron with different degrees of deterioration of cement mortar lining in reclaimed water pipelines |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9057434/ https://www.ncbi.nlm.nih.gov/pubmed/35515357 http://dx.doi.org/10.1039/d0ra08042j |
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