Weldability of duplex steels for the transport of aggressive media containing hydrogen sulfide and carbon dioxide

Filisteev V.G. v_filisteev@vniigaz.gazprom.ru Gazprom “VNIIGAZ” LLC Moscow Region, Leninsky district, Razvilka
Steklova E.O. Ural federal university named after the first President of Russia B.N. Yeltsin Ekaterinburg
Berezovsky A.V.
DOI: 10.24412/2076-6785-2023-2-70-75

The industry looks for new steel types, as requirements for steel strength properties in corrosion environment are becoming more stringent. Duplex stainless steels have a chance to become the most advantageous material for a number of industries. The technical interest in these alloys is due to the improvement of steel production technology, as producers found an opportunity to control nitrogen content more precisely.
The paper highlights a need to study joints weldability and corrosion resistance to hydrogen sulfide stress cracking (HSC), hydrogen
cracking (HC), intercrystalline Corrosion (ICC), knife-line attack (KLA), and pitting corrosion to assess the possibility of using duplex steels in the production of structures designed for operation in corrosion environment.

Materials and methods
To assess the possibility of using duplex steels in the manufacture of structures operated in aggressive environments, it is necessary to study the weldability of these steels and the corrosion resistance of welded joints, including against hydrogen sulfide stress cracking, hydrogen cracking, resistance to intercrystalline and knife corrosion and pitting corrosion.

weldability of duplex steels, transmission of corrosion media, welding materials, welding parameters
Download article