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Stability of an Electrodeposited Nanocrystalline Ni-Based Alloy Coating in Oil and Gas Wells with the Coexistence of H(2)S and CO(2)
The stability of an electrodeposited nanocrystalline Ni-based alloy coating in a H(2)S/CO(2) environment was investigated by electrochemical measurements, weight loss method, and surface characterization. The results showed that both the cathodic and anodic processes of the Ni-based alloy coating we...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5554013/ https://www.ncbi.nlm.nih.gov/pubmed/28772995 http://dx.doi.org/10.3390/ma10060632 |
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author | Sui, Yiyong Sun, Chong Sun, Jianbo Pu, Baolin Ren, Wei Zhao, Weimin |
author_facet | Sui, Yiyong Sun, Chong Sun, Jianbo Pu, Baolin Ren, Wei Zhao, Weimin |
author_sort | Sui, Yiyong |
collection | PubMed |
description | The stability of an electrodeposited nanocrystalline Ni-based alloy coating in a H(2)S/CO(2) environment was investigated by electrochemical measurements, weight loss method, and surface characterization. The results showed that both the cathodic and anodic processes of the Ni-based alloy coating were simultaneously suppressed, displaying a dramatic decrease of the corrosion current density. The corrosion of the Ni-based alloy coating was controlled by H(2)S corrosion and showed general corrosion morphology under the test temperatures. The corrosion products, mainly consisting of Ni(3)S(2), NiS, or Ni(3)S(4), had excellent stability in acid solution. The corrosion rate decreased with the rise of temperature, while the adhesive force of the corrosion scale increased. With the rise of temperature, the deposited morphology and composition of corrosion products changed, the NiS content in the corrosion scale increased, and the stability and adhesive strength of the corrosion scale improved. The corrosion scale of the Ni-based alloy coating was stable, compact, had strong adhesion, and caused low weight loss, so the corrosion rates calculated by the weight loss method cannot reveal the actual oxidation rate of the coating. As the corrosion time was prolonged, the Ni-based coating was thinned while the corrosion scale thickened. The corrosion scale was closely combined with the coating, but cannot fully prevent the corrosive reactants from reaching the substrate. |
format | Online Article Text |
id | pubmed-5554013 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-55540132017-08-14 Stability of an Electrodeposited Nanocrystalline Ni-Based Alloy Coating in Oil and Gas Wells with the Coexistence of H(2)S and CO(2) Sui, Yiyong Sun, Chong Sun, Jianbo Pu, Baolin Ren, Wei Zhao, Weimin Materials (Basel) Article The stability of an electrodeposited nanocrystalline Ni-based alloy coating in a H(2)S/CO(2) environment was investigated by electrochemical measurements, weight loss method, and surface characterization. The results showed that both the cathodic and anodic processes of the Ni-based alloy coating were simultaneously suppressed, displaying a dramatic decrease of the corrosion current density. The corrosion of the Ni-based alloy coating was controlled by H(2)S corrosion and showed general corrosion morphology under the test temperatures. The corrosion products, mainly consisting of Ni(3)S(2), NiS, or Ni(3)S(4), had excellent stability in acid solution. The corrosion rate decreased with the rise of temperature, while the adhesive force of the corrosion scale increased. With the rise of temperature, the deposited morphology and composition of corrosion products changed, the NiS content in the corrosion scale increased, and the stability and adhesive strength of the corrosion scale improved. The corrosion scale of the Ni-based alloy coating was stable, compact, had strong adhesion, and caused low weight loss, so the corrosion rates calculated by the weight loss method cannot reveal the actual oxidation rate of the coating. As the corrosion time was prolonged, the Ni-based coating was thinned while the corrosion scale thickened. The corrosion scale was closely combined with the coating, but cannot fully prevent the corrosive reactants from reaching the substrate. MDPI 2017-06-09 /pmc/articles/PMC5554013/ /pubmed/28772995 http://dx.doi.org/10.3390/ma10060632 Text en © 2017 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 Sui, Yiyong Sun, Chong Sun, Jianbo Pu, Baolin Ren, Wei Zhao, Weimin Stability of an Electrodeposited Nanocrystalline Ni-Based Alloy Coating in Oil and Gas Wells with the Coexistence of H(2)S and CO(2) |
title | Stability of an Electrodeposited Nanocrystalline Ni-Based Alloy Coating in Oil and Gas Wells with the Coexistence of H(2)S and CO(2) |
title_full | Stability of an Electrodeposited Nanocrystalline Ni-Based Alloy Coating in Oil and Gas Wells with the Coexistence of H(2)S and CO(2) |
title_fullStr | Stability of an Electrodeposited Nanocrystalline Ni-Based Alloy Coating in Oil and Gas Wells with the Coexistence of H(2)S and CO(2) |
title_full_unstemmed | Stability of an Electrodeposited Nanocrystalline Ni-Based Alloy Coating in Oil and Gas Wells with the Coexistence of H(2)S and CO(2) |
title_short | Stability of an Electrodeposited Nanocrystalline Ni-Based Alloy Coating in Oil and Gas Wells with the Coexistence of H(2)S and CO(2) |
title_sort | stability of an electrodeposited nanocrystalline ni-based alloy coating in oil and gas wells with the coexistence of h(2)s and co(2) |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5554013/ https://www.ncbi.nlm.nih.gov/pubmed/28772995 http://dx.doi.org/10.3390/ma10060632 |
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