Electrochemical impedance spectroscopy analysis of X70 pipeline steel stress corrosion cracking in high pH carbonate solution
Electrochemical impedance spectroscopy analysis of X70 pipeline steel stress corrosion cracking in high pH carbonate solution
- New search for: Oskuie, A.A.
- New search for: Shahrabi, T.
- New search for: Shahriari, A.
- New search for: Saebnoori, E.
- New search for: Oskuie, A.A.
- New search for: Shahrabi, T.
- New search for: Shahriari, A.
- New search for: Saebnoori, E.
In this study, electrochemical impedance spectroscopy (EIS) technique was used to investigate the development of stress corrosion cracking (SCC) in X70 pipeline steels. Slow strain rate testing (SSRT) was performed on steel samples in high pH bicarbonate solution. Calculation of impedance data for cracks during slow strain rate testing. Potentiostatic EIS tests were also conducted regularly to determine the changes associated with the SCC. The Bode modulus and phase diagrams for cracks were calculated. Furthermore, the suitable frequency window for detection of the cracks by EIS was determined. Proposing a circuit model for stress corrosion cracking of X70 pipeline steel. Trend of phase angle shift and impedance modulus for X70 steel during SSRT. Finally, a circuit model proposed for the cracking.
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Electrochemical impedance spectroscopy analysis of X70 pipeline steel stress corrosion cracking in high pH carbonate solution
Elektrochemische impedanzspektroskopische Analyse der Spannungsrisskorrosion des Rohrstahles X70 in Carbonatlösungen mit hohem pH-Wert
Corrosion Science ; 61 ; 111-122
2012
12 Seiten, 17 Bilder, 2 Tabellen, 28 Quellen
Article (Journal)
English
unlegierter Stahl , Rohrstahl , Pipeline , Spannungsrisskorrosion , Carbonat , alkalische Lösung , pH-Wert , elektrochemische Impedanzspektrometrie , Bode-Diagramm , Zugprüfung , Dehnungsrate , Nyquist-Diagramm , Polarisationskurve , Rissempfindlichkeit , Risseinleitung , Rissausbreitung , Spannungs-Dehnungs-Diagramm , Ersatzschaltbild , Bruchgefüge , Fraktographie , Oxidschichtausbildung , Röntgenbeugung , Korrosionspotenzial
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