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Corrosion Resistance Mechanism of Mica–Graphene/Epoxy Composite Coating in CO(2)-Cl(−) System

The working environment for tubing in oil and gas fields is becoming more and more serious due to the exploration of unconventional oil and gas resources, leading to the increasing need for a protective internal coating to be used in tubing. Therefore, a new mica–graphene/epoxy composite coating wit...

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Autores principales: Zhu, Shi-Dong, Li, Yan-Peng, Wang, Hong-Wei, Li, Jin-Ling, Fu, An-Qing, Chen, Gang, Ma, Dong, Li, Xuan-Peng, Cheng, Frank
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8839737/
https://www.ncbi.nlm.nih.gov/pubmed/35161138
http://dx.doi.org/10.3390/ma15031194
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author Zhu, Shi-Dong
Li, Yan-Peng
Wang, Hong-Wei
Li, Jin-Ling
Fu, An-Qing
Chen, Gang
Ma, Dong
Li, Xuan-Peng
Cheng, Frank
author_facet Zhu, Shi-Dong
Li, Yan-Peng
Wang, Hong-Wei
Li, Jin-Ling
Fu, An-Qing
Chen, Gang
Ma, Dong
Li, Xuan-Peng
Cheng, Frank
author_sort Zhu, Shi-Dong
collection PubMed
description The working environment for tubing in oil and gas fields is becoming more and more serious due to the exploration of unconventional oil and gas resources, leading to the increasing need for a protective internal coating to be used in tubing. Therefore, a new mica–graphene/epoxy composite coating with different graphene contents (0.0, 0.2, 0.5, 0.7, and 1.0 wt.%) was prepared to improve the tubing resistance to a corrosive medium, an autoclave was used to simulate the working environment, and an electrochemical workstation assisted by three-electrodes was used to study the electrochemical characteristics of the coating. The results showed that the addition of a certain amount of graphene into the mica/epoxy coating significantly improved the corrosion resistance of the composite coating, and when the graphene content increased, the corrosion resistance of the mica/epoxy coating first increased and then decreased when the corrosion current density of a 35 wt.% 800(#) mica/epoxy coating with a 0.7 wt.% graphene content was the lowest (7.11 × 10(−1)(3) A·cm(−2)), the corrosion potential was the highest (292 mV), the polarization resistance was the largest (3.463 × 10(9) Ω·cm(2)), and the corrosion resistance was improved by 89.3% compared to the coating without graphene. Furthermore, the adhesion of the coating with 0.7 wt.% graphene was also the largest (8.81 MPa, increased by 3.4%) and had the smallest diffusion coefficient (1.566 × 10(7) cm(2)·s(−1), decreased by 76.1%), and the thermal stability improved by 18.6%. Finally, the corrosion resistance mechanism of the composite coating with different graphene contents at different soaking times was revealed based on the electrochemistry and morphology characteristics other than water absorption and contact angle.
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spelling pubmed-88397372022-02-13 Corrosion Resistance Mechanism of Mica–Graphene/Epoxy Composite Coating in CO(2)-Cl(−) System Zhu, Shi-Dong Li, Yan-Peng Wang, Hong-Wei Li, Jin-Ling Fu, An-Qing Chen, Gang Ma, Dong Li, Xuan-Peng Cheng, Frank Materials (Basel) Article The working environment for tubing in oil and gas fields is becoming more and more serious due to the exploration of unconventional oil and gas resources, leading to the increasing need for a protective internal coating to be used in tubing. Therefore, a new mica–graphene/epoxy composite coating with different graphene contents (0.0, 0.2, 0.5, 0.7, and 1.0 wt.%) was prepared to improve the tubing resistance to a corrosive medium, an autoclave was used to simulate the working environment, and an electrochemical workstation assisted by three-electrodes was used to study the electrochemical characteristics of the coating. The results showed that the addition of a certain amount of graphene into the mica/epoxy coating significantly improved the corrosion resistance of the composite coating, and when the graphene content increased, the corrosion resistance of the mica/epoxy coating first increased and then decreased when the corrosion current density of a 35 wt.% 800(#) mica/epoxy coating with a 0.7 wt.% graphene content was the lowest (7.11 × 10(−1)(3) A·cm(−2)), the corrosion potential was the highest (292 mV), the polarization resistance was the largest (3.463 × 10(9) Ω·cm(2)), and the corrosion resistance was improved by 89.3% compared to the coating without graphene. Furthermore, the adhesion of the coating with 0.7 wt.% graphene was also the largest (8.81 MPa, increased by 3.4%) and had the smallest diffusion coefficient (1.566 × 10(7) cm(2)·s(−1), decreased by 76.1%), and the thermal stability improved by 18.6%. Finally, the corrosion resistance mechanism of the composite coating with different graphene contents at different soaking times was revealed based on the electrochemistry and morphology characteristics other than water absorption and contact angle. MDPI 2022-02-04 /pmc/articles/PMC8839737/ /pubmed/35161138 http://dx.doi.org/10.3390/ma15031194 Text en © 2022 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
Zhu, Shi-Dong
Li, Yan-Peng
Wang, Hong-Wei
Li, Jin-Ling
Fu, An-Qing
Chen, Gang
Ma, Dong
Li, Xuan-Peng
Cheng, Frank
Corrosion Resistance Mechanism of Mica–Graphene/Epoxy Composite Coating in CO(2)-Cl(−) System
title Corrosion Resistance Mechanism of Mica–Graphene/Epoxy Composite Coating in CO(2)-Cl(−) System
title_full Corrosion Resistance Mechanism of Mica–Graphene/Epoxy Composite Coating in CO(2)-Cl(−) System
title_fullStr Corrosion Resistance Mechanism of Mica–Graphene/Epoxy Composite Coating in CO(2)-Cl(−) System
title_full_unstemmed Corrosion Resistance Mechanism of Mica–Graphene/Epoxy Composite Coating in CO(2)-Cl(−) System
title_short Corrosion Resistance Mechanism of Mica–Graphene/Epoxy Composite Coating in CO(2)-Cl(−) System
title_sort corrosion resistance mechanism of mica–graphene/epoxy composite coating in co(2)-cl(−) system
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8839737/
https://www.ncbi.nlm.nih.gov/pubmed/35161138
http://dx.doi.org/10.3390/ma15031194
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