CORROSION RESISTANCE OF Fe-Al/Al2O3 DUPLEX COATING ON PIPELINE STEEL X80 IN SIMULATED OIL AND GAS WELL ENVIRONMENT

被引：9
|
作者：
Huang, Min [1 ,2 ]
Wang, Yu [1 ]
Wang, Ping-Gu [1 ]
Shi, Qin-Yi [1 ]
Zhang, Meng-Xian [1 ]
机构：
[1] TaiZhou Univ, Zhejiang Prov Key Lab Cutting Tools, Taizhou 318000, Peoples R China
[2] Xian Shiyou Univ, Sch Mat Sci & Engn, Xian 710065, Peoples R China
来源：
SURFACE REVIEW AND LETTERS | 2015年 / 22卷 / 04期
关键词：
Pipeline steel X80; Fe-Al/Al2O3 duplex coating; corrosion resistance; simulated oil and gas environment; CERAMIC COATINGS; LAYER; BEHAVIOR; CARBON;
D O I：
10.1142/S0218625X15500456
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Corrosion resistant Fe-Al/Al2O3 duplex 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-layer Fe-Al coating and Fe-Al/Al2O3 duplex 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-layer Fe-Al coating consists of Fe2Al5 and FeAl, 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 MPa CO2 and 0.1 MPa H2S, corrosion weight loss rate of pipeline steel X80 with Fe-Al/Al2O3 duplex coating decreased to 23% of original pipeline steel X80, which improved by 10% than that of pipeline steel X80 with mono-layer Fe-Al coating. It cannot find obvious cracks and pits on the corrosion surface of pipeline steel X80 with Fe-Al/Al2O3 duplex coating.
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页数：8
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