Susceptibility of Selected Steel Grades to Hydrogen Embrittlement - Simulating Field Conditions by Performing Laboratory Wheel Tests With Autoclaves

Publikationen: KonferenzbeitragPaperForschung(peer-reviewed)

Externe Organisationseinheiten

  • RAG Austria AG

Abstract

The technical suitability of the steel grades L80 and 42CrMo4 (UNS G41400) for the application in an underground gas production facility is investigated. Therefore, the materials are tested with respect to their susceptibility to embrittlement by hydrogen gas, up to a maximum H2-partial pressure of 20 bar (290 psi), by means of constant load tests (CLTs) and immersion tests with subsequent hydrogen analysis.

The tests are carried out within a specially developed and constructed autoclave setup, which enables rotation and heating of the vessels. Each autoclave holds 3 specimens: a coupon for measuring the mass loss, an immersion specimen for hydrogen analysis and a small tensile specimen under constant load (CLT).

Tests are done under realistic field conditions and hence samples are periodically wetted by the aqueous part of the test medium, which contains chloride in a concentration of 15 000 mg/L. The gaseous part of the medium consists of H2 and/or CO2. Tests are performed with or without a corrosion inhibitor and last 30 days. In general, the examined steel grades show a good resistance to hydrogen embrittlement.

Details

OriginalspracheEnglisch
Seitenumfang10
StatusVeröffentlicht - Mär 2019
VeranstaltungNACE Corrosion 2019 - Music City Center, Nashville, USA / Vereinigte Staaten
Dauer: 24 Mär 201928 Mär 2019

Konferenz

KonferenzNACE Corrosion 2019
LandUSA / Vereinigte Staaten
OrtNashville
Zeitraum24/03/1928/03/19