Corrosion Fatigue of Standard Duplex Stainless Steel X2CrNiMoN22-5-3 under Rotation Bending Load in Northern German Basin Environment

Standard duplex stainless steel X2CrNiMoN22-5-3 is resistant to both, corrosion and mechanical stress, but corrosion fatigue (CF) lowers the lifetime expectancy in a geothermal environment such as the Northern German Basin. Laboratory experiments used the in-situ electrolyte at 369 K in a specifical...

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Bibliographic Details
Published inSolid state phenomena Vol. 349; pp. 71 - 76
Main Authors Pfennig, Anja, Wolf, Marcus
Format Journal Article
LanguageEnglish
Published Zurich Trans Tech Publications Ltd 06.09.2023
Subjects
Bending fatigue
Corrosion effects
Corrosion environments
Corrosion fatigue
Corrosion rate
Corrosion resistance
Corrosion resistant steels
Cyclic loads
Degradation
Duplex stainless steels
Fatigue failure
Metal fatigue
Notches
Pits
Reaction kinetics
Rotation
Stress concentration
Stress propagation
Thickness
Duplex Steel
Rotation Bending Load
Micro Structure
Corrosion
Corrosion Fatigue
Axial Load
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Summary:Standard duplex stainless steel X2CrNiMoN22-5-3 is resistant to both, corrosion and mechanical stress, but corrosion fatigue (CF) lowers the lifetime expectancy in a geothermal environment such as the Northern German Basin. Laboratory experiments used the in-situ electrolyte at 369 K in a specifically designed corrosion chamber applying rotation bending cyclic load to failure. CF behaviour was compared to pure push-pull load. Corrosion kinetics are independent of the load applied. Failure is initiated by pits resulting in mechanical degradation. Increased thickness of the passivating layer surrounding pits enhances degradation or delamination. Also, sharp notches located along the pit edge increase notch effects and stress concentration consequently leading to fast crack propagation and early failure.
Bibliography:Special topic volume with invited peer-reviewed papers only
ISSN:1012-0394
1662-9779
1662-9779
DOI:10.4028/p-JX1ios