The effect of alloying elements on the electrochemical corrosion of low residual carbon steels in stagnant CO2-saturated brine

Alhajji, J. N.; Reda, M. R.

doi:10.1016/0010-938x(93)90026-d

Cited by 25 publications

(17 citation statements)

References 6 publications

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“…The influence on heat treatment prior to exposure has been widely described [11], [22], [28], [29]. Under supercritical CO 2 conditions a martensitic microstructure of hardened and tempered 1.4542 at low temperatures (650 °C) (< 0.001 mm/year) and under saline water normalized microstructure (ca.…”

Section: A Kinetics Of Static Corrosion Experimentsmentioning

confidence: 99%

Potential of Martensitic Stainless Steel X5CrNiCuNb 16-4 as Pipe Steel in Corrosive CCS Environment

Pfennig¹,

Kranzmann²

2017

IJESD

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Abstract-Pipe steels suitable for carbon capture and storage technology (CCS) require resistance against the corrosive environment of a potential CCS-site (heat, pressure, salinity of the aquifer, CO 2 -partial pressure). X5CrNiCuNb16-4 has been proven to be sufficient resistant in corrosive environments, but shows rather unusual corrosion behaviour in CCS environment. Therefore 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 CO 2 and b) CO 2 -saturated synthetic aquifer environment similar to on-shore CCS-sites in the Northern German Basin. Additionally fatigue tests were performed via push-pull tests with a series of 30 specimens was tested at stress amplitudes between 150 MPa and 500 MPa (sinusoidal dynamic test loads, R=-1; resonant frequency ~ 30 Hz). Best corrosion resistance in the liquid phase is achieved via normalizing prior to exposure and hardening+tempering at 670 °C leads to lowest corrosion rates in the supercritical phase. With no regard to atmosphere discontinuously ellipsoidal surface corrosion regions appear after exposure of 4000 h and more. The endurance limit of X5CrNiCuNb16-4 measured in air is reduced by more than 50% when exposed to CCS environment (maximum number of cycles (10 x 10 6 ) at a stress amplitude of 150 MPa) The scatter range TN = 1:34 is disproportionately large contributing to an overall unusual corrosion behaviour Index Terms-Corrosion, CCS, carbon storage, aquifer, heat treatment, fatigue, endurance limit.

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Section: A Kinetics Of Static Corrosion Experimentsmentioning

confidence: 99%

Potential of Martensitic Stainless Steel X5CrNiCuNb 16-4 as Pipe Steel in Corrosive CCS Environment

Pfennig¹,

Kranzmann²

2017

IJESD

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“…It is known from thermal energy production that the CO 2 -corrosion is sensitively dependent on alloy composition (in particular Cr and C), contamination of alloy and media, environmental conditions like temperature, CO 2 partial pressure, flow conditions and protective corrosion scales (Cui et al, 2006;Zhang et al, 2008;Lopez et al, 2003a;Mu and Zhao, 2010;Bonis, 2008;Enerhaug, 2002;Neubert, 2008;Kirchheiner and Wölpert, 2008;Zhang et al, 2005;Alhajji and Reda, 1993;Choi and Nešić, 2008;Moreira et al, 2004;Jiang et al, 2008;Ahmad et al, 2000). Generally a high Cr-content (above 12%) leads to a passivating Cr-oxide layer (Cr 2 O 3 ) on the steels surfaces if Cr is part of the regular atomic structure and not trapped in secondary phases such as carbides.…”

Section: Introductionmentioning

confidence: 97%

Reliability of pipe steels with different amounts of C and Cr during onshore carbon dioxide injection

Pfennig

Kranzmann

2011

International Journal of Greenhouse Gas Control

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“…from the combustion processes of power plants, are compressed into deep geological layers [4][5][6][7][8]. From thermal energy production it is known that the CO 2 -corrosion is sensitively dependent on alloy composition, contamination of alloy and media, environmental conditions like temperature, CO 2 partial pressure, flow conditions and protective corrosion scales [6][7][8][9][10][11][12][13][14][15][16]. Considering different environments, aquifer waters and pressures, the analyzed temperature regime between 40°C and 60°C is a critical temperature region well known for corrosion processes [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Predicting the life time of steels in CCS environment from long term local corrosion experiments

et al. 2012

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To predict the reliability and safety during the injection of compressed emission gases -mainly containing CO 2 -into deep geological layers (CCS-technology, Carbon Capture and Storage), the influence of heat treatment on pit corrosion needs to be considered. Different heat treated steels used as an injection pipe with 13% chromium and 0.46% carbon (X46Cr13, 1.4034) and 0.2% carbon (X20Cr13, 1.4021) as well as 16% chromium steel X5CrNiCuNb16-4 (1.4542) were tested in laboratory experiments. The samples were exposed for up to 1 year to the distinct synthetic aquifer environment saturated with technical CO 2 at a flow rate of 3 l/h. The corrosion rate generally does not exceed 0.03 mm/year. Pits with maximum pit heights around 300 µm were obtained for hardened X20Cr13 with martensitic microstructure. The least amount of pits is found on X46Cr13. The higher carbon content in, X46Cr13 (0.46% C), results in a lower amount of pits compared to X20Cr13 (0.20%).

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The effect of alloying elements on the electrochemical corrosion of low residual carbon steels in stagnant CO2-saturated brine

Cited by 25 publications

References 6 publications

Potential of Martensitic Stainless Steel X5CrNiCuNb 16-4 as Pipe Steel in Corrosive CCS Environment

Potential of Martensitic Stainless Steel X5CrNiCuNb 16-4 as Pipe Steel in Corrosive CCS Environment

Reliability of pipe steels with different amounts of C and Cr during onshore carbon dioxide injection

Predicting the life time of steels in CCS environment from long term local corrosion experiments

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