Hydrogen Uptake of Duplex 2205 at H₂ Partial Pressures up to 100 bar

Description

Microbiological methanation is investigated in an underground natural gas reservoir. Since H₂ is involved in the process, hydrogen embrittlement of steel must inevitably be considered. Therefore, a routine for testing has been developed and a unique autoclave test bench was designed to simulate field conditions. The 2205 duplex stainless steel (UNS S31803) was investigated. Constant load tests (CLTs) and immersion tests with subsequent hydrogen analyses were performed. The specimens were exposed to different partial pressures of H₂ under both dry and wet conditions (with brine). Additionally, the influence of CO₂ under wet conditions was covered. Tests were performed at two different temperatures (25 °C and 80 °C) and lasted for 30 days. In general, the duplex stainless steel shows a good resistance to hydrogen embrittlement, but significant differences to other steels in hydrogen uptake were measured.

Period	1 Oct 2019
Event title	ESSC & DUPLEX 2019: 11th European Stainless Steel Conference Science & Market and the 8th European Duplex Stainless Steel Conference & Exhibition
Event type	Conference
Location	Wien, AustriaShow on map
Degree of Recognition	International