Super Duplex Stainless Steels (SDSSs) display their best performances in localized pitting corrosion resistance, so they are materials of choice in many industries, such as oil&gas. The thermal history coupled to the plastic deformation during hot forming processes of the large components play a major role, changing the microstructure of the studied parts, affecting locally their corrosion resistance. These properties have been tested through potentiodynamic anodic polarization and gravimetric measurements. A correlation between the displayed microstructure evolution and the pits generation has been evaluated. Moreover, the actual chemical composition of the different phases has been estimated through SEM-EDS analysis.

Local pitting corrosion resistance evaluation in large forged UNS-S32760 Super Duplex Stainless Steel parts of a sphere valve for the oil&gas industry

CIUFFINI, ANDREA FRANCESCO;BARELLA, SILVIA;GRUTTADAURIA, ANDREA;Mapelli, C.
2017-01-01

Abstract

Super Duplex Stainless Steels (SDSSs) display their best performances in localized pitting corrosion resistance, so they are materials of choice in many industries, such as oil&gas. The thermal history coupled to the plastic deformation during hot forming processes of the large components play a major role, changing the microstructure of the studied parts, affecting locally their corrosion resistance. These properties have been tested through potentiodynamic anodic polarization and gravimetric measurements. A correlation between the displayed microstructure evolution and the pits generation has been evaluated. Moreover, the actual chemical composition of the different phases has been estimated through SEM-EDS analysis.
2017
Large parts; Materials characterization; Oil&gas industry; Pitting corrosion resistance; Super Duplex Stainless Steels; Condensed Matter Physics; Mechanics of Materials; 2506
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1049264
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