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CORROSION RESISTANCE OFFe–Al/Al2O3DUPLEX COATING ON PIPELINE STEEL X80 IN SIMULATED OIL AND GAS WELL ENVIRONMENT

Author

Listed:
  • MIN HUANG

    (Zhejiang Provincial Key Laboratory for Cutting Tools, TaiZhou University, TaiZhou 318000, P. R. China;
    School of Materials Science and Engineering, Xi'an Shiyou University, Xi'an 710065, P. R. China)

  • YU WANG

    (Zhejiang Provincial Key Laboratory for Cutting Tools, TaiZhou University, TaiZhou 318000, P. R. China)

  • PING-GU WANG

    (Zhejiang Provincial Key Laboratory for Cutting Tools, TaiZhou University, TaiZhou 318000, P. R. China)

  • QIN-YI SHI

    (Zhejiang Provincial Key Laboratory for Cutting Tools, TaiZhou University, TaiZhou 318000, P. R. China)

  • MENG-XIAN ZHANG

    (Zhejiang Provincial Key Laboratory for Cutting Tools, TaiZhou University, TaiZhou 318000, P. R. China)

Abstract

Corrosion resistantFe–Al/Al2O3duplex coating for pipeline steel X80 was prepared by a combined treatment of low-temperature aluminizing and micro-arc oxidation (MAO). Phase composition and microstructure of mono-layerFe–Alcoating andFe–Al/Al2O3duplex coating were studied by X-ray diffraction (XRD), scanning electron microscope (SEM) with energy dispersive spectrometer (EDS). Corrosion resistance of the coated pipeline steel X80 in a simulated oil and gas well condition was also investigated. Mono-layerFe–Alcoating consists ofFe2Al5andFeAl, which is a suitable transitional layer for the preparation of ceramic coating by MAO on the surface of pipeline steel X80. Under the same corrosion condition at 373 K for 168 h with 1 MPaCO2and 0.1 MPaH2S, corrosion weight loss rate of pipeline steel X80 withFe–Al/Al2O3duplex coating decreased to 23% of original pipeline steel X80, which improved by 10% than that of pipeline steel X80 with mono-layerFe–Alcoating. It cannot find obvious cracks and pits on the corrosion surface of pipeline steel X80 withFe–Al/Al2O3duplex coating.

Suggested Citation

  • Min Huang & Yu Wang & Ping-Gu Wang & Qin-Yi Shi & Meng-Xian Zhang, 2015. "CORROSION RESISTANCE OFFe–Al/Al2O3DUPLEX COATING ON PIPELINE STEEL X80 IN SIMULATED OIL AND GAS WELL ENVIRONMENT," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 22(04), pages 1-8.
    • Handle: RePEc:wsi:srlxxx:v:22:y:2015:i:04:n:s0218625x15500456
    DOI: 10.1142/S0218625X15500456
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