| Autor: |
MIN HUANG, YU WANG, PING-GU WANG, QIN-YI SHI, MENG-XIAN ZHANG |
| Předmět: |
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| Zdroj: |
Surface Review & Letters; Aug2015, Vol. 22 Issue 4, p1550045-1-1550045-8, 8p, 1 Diagram, 1 Chart, 5 Graphs |
| Abstrakt: |
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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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