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.| File | Dimensione | Formato | |
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