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环氧黑陶瓷涂层在塔河油田的耐蚀性能研究

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  • 1. 中国石油化工股份有限公司西北油田分公司中国石油化工集团公司碳酸盐岩缝洞型油藏提高采收率重点实验室; 2. 中国石油冀东油田分公司; 3. 中国石油集团工程材料研究院有限公司石油管材及装备材料服役行为与结构安全国家重点实验室
蔡 锐(1983-),硕士研究生,高级工程师,主要研究方向为石油管材及装备的腐蚀与防护,电话:029-81887898,E-mail:cairui_1983@163.com

收稿日期: 2021-10-25

  修回日期: 2021-11-18

  录用日期: 2021-12-14

  网络出版日期: 2023-12-28

Study on Corrosion Resistance of Epoxy Black Ceramic Coating in Tahe Oilfield

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  • 1. Key Laboratory of Enhanced Oil Recovery in Carbonate Fractured-Vuggy Reservoirs, SINOPEC, Northwest Company of China Petroleum and Chemical Corporation, Urumqi 830011, China;2. PetroChina Jidong Oilfield Company, Tangshan 063004, China;3. State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment Materials, CNPC Tubular Goods Research Institute, Xi’an 710077, China

Received date: 2021-10-25

  Revised date: 2021-11-18

  Accepted date: 2021-12-14

  Online published: 2023-12-28

摘要

随着油田开采年限的延长以及服役环境的复杂化,内涂层的适用性遭受挑战。模拟环氧黑陶瓷涂层在塔河油田的服役工况条件,利用高温高压釜模拟工况环境,研究了涂层在气、油、水3相中的耐蚀性,并利用电化学交流阻抗技术对涂层在H2S主导、H2S/CO2共存和CO2主导等6种模拟工况条件下的电化学特征进行了分析。研究表明,环氧黑陶瓷涂层具有较好的耐工况腐蚀特征, 其交流阻抗值高于107 Ω·cm2。现场应用发现涂层与基体结合良好,具有较好的抗阴极剥离性能。同时还对其失效机制进行了初步探讨,对其在现场工况条件下的服役寿命进行了初步预测。涂装缺陷成为了水及各种离子扩散的快速通道,在涂层与基体界面处发生电化学腐蚀,导致界面的局部压力增大而使涂层发生起泡、开裂。采用拟合曲线的二次多项式预测环氧黑陶瓷涂层寿命为 517 d。

本文引用格式

许艳艳, 赵金龙, 关磊, 葛鹏莉, 肖雯雯, 蔡锐 . 环氧黑陶瓷涂层在塔河油田的耐蚀性能研究[J]. 材料保护, 2022 , 55(4) : 25 -32 . DOI: 10.16577/j.issn.1001-1560.2022.0091

Abstract

With the extension of oilfield production life and the complication of its service environmental conditions, the applicability of the inner coating would be being challenged. In this work, the service condition of epoxy black ceramic coating in Tahe oilfield was simulated by using high-temperature autoclave to study the corrosion resistance of coatings in gas, oil and water phases, and the electrochemical characteristics of the coating in 6 kinds of simulated working conditions such as H2S dominated, H2S / CO2 coexistence and CO2 dominated were analyzed by the electrochemical AC impedance technique (EIS). Results showed that the epoxy black ceramic coating possessed good corrosion resistance characteristics under working conditions, and the AC impedance value was higher than 107 Ω·cm2. From the filed application, the coating had good adhesion to the substrate and good cathodic stripping resistance. Moreover, the failure mechanism of coatings was discussed preliminarily, and their service life under field conditions was preliminarily predicted. Coating defects became a fast channel for the diffusion of water and various ions, electrochemical corrosion occurred at the interface between the coating and the substrate, resulting in the increase of local pressure at the interface and the blistering and cracking of the coating. Furthermore, the life of epoxy black ceramic coating predicted by quadratic polynomial of fitting curve was 517 d.
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