Unusual Corrosion Behavior of 1.4542 Exposed a Laboratory Saline Aquifer Water CCS-environment. (July 2017)

• Record Type: Journal Article
• Authors: Pfennig, Anja; Wolthusen, Helmut; Kranzmann, Axel
• Is Part Of: Energy procedia. Volume 114(2017)
• Page Start: 5229
• Page End: 5240
• Publication Date: 2017-07
• Subjects: steel -- supercritical CO2 -- pipeline -- corrosion -- CCS -- CO2-storage; Power resources -- Congresses; Power resources -- Periodicals; Power resources; Conference proceedings; Periodicals; 333.7905
• DOI: 10.1016/j.egypro.2017.03.1679
• Languages: English
• ISSNs: 1876-6102

Abstract

Abstract: Differently heat treated coupons of 1.4542 were kept at T=60 °C and ambient pressure as well as p=100 bar for 700 h - 8000 h in an a) water saturated supercritical CO2 and b) CO2-saturated synthetic aquifer environment similar to on-shore CCS-sites in the Northern German Basin. Surface corrosion layers are homogeneous but unusually discontinuously ellipsoidal. After 8000 h at 100 bar maximum corrosion rate in the liquid phase is approximately 0.014 mm/year, with normalizing providing best corrosion resistance and approximately 0.003 mm/year in the supercritical phase where hardening+tempering at 670 °C leads to lowest corrosion rates.