In:
Materials Science Forum, Trans Tech Publications, Ltd., Vol. 944 ( 2019-1), p. 910-917
Abstract:
In the present work, a self-built device called “full scale tubular goods erosion-corrosion test system” was used to test the P110SS tubing with a total length of 10 m and a full scale PFF78-70 flat valve to study their erosion-corrosion behaviors in the acceleration simulation operating condition of a well in Sichuang oil field of China. The erosion-corrosion performance of the specimen was investigated by KH-7700 digital microscope, scanning electron microscopy (SEM), X-ray power diffraction (XRD) and energy-dispersive spectroscopy (EDS). The results indicated that the P110SS tubing suffered catastrophic erosion-corrosion; the maximum pitting corrosion rate of the P110SS in the gas phase fluid was 5.29mm/a; while that in the liquid phase fluid was 11.13mm/a; A double-layer corrosion products scale, inner FeCO 3 layer and outer mixture layer mainly dominated by FeO, Fe 3 O 4 , Fe 2 O 3 and FeO(OH), formed on the P110SS tubing. Erosion-corrosion only occurred in the stress concentration area of the valve plate hole of the PFF78-70 plate valve, and the size of the corrosion pits is about 0.5mm.
Type of Medium:
Online Resource
ISSN:
1662-9752
DOI:
10.4028/www.scientific.net/MSF.944
DOI:
10.4028/www.scientific.net/MSF.944.910
Language:
Unknown
Publisher:
Trans Tech Publications, Ltd.
Publication Date:
2019
detail.hit.zdb_id:
2047372-2
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