CORROSION RESISTANCE OF Fe–Al/Al2O3 DUPLEX COATING ON PIPELINE STEEL X80 IN SIMULATED OIL AND GAS WELL ENVIRONMENT
| Autor: | Ping-Gu Wang, Min Huang, Meng-Xian Zhang, Yu Wang, Qin-Yi Shi |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Materials science
business.industry Scanning electron microscope Metallurgy Fossil fuel FEAL Surfaces and Interfaces engineering.material Condensed Matter Physics Microstructure Surfaces Coatings and Films Corrosion Coating Duplex (building) Phase composition Materials Chemistry engineering business |
| Zdroj: | Surface Review and Letters. 22:1550045 |
| ISSN: | 1793-6667 0218-625X |
| DOI: | 10.1142/s0218625x15500456 |
| Popis: | Corrosion resistant Fe – Al / Al 2 O 3 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 / Al 2 O 3 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 Fe 2 Al 5 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 CO 2 and 0.1 MPa H 2 S , corrosion weight loss rate of pipeline steel X80 with Fe – Al / Al 2 O 3 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 / Al 2 O 3 duplex coating. |
| Databáze: | OpenAIRE |
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