Electrochemical corrosion behavior of X80 pipeline steel in a near-neutral pH solution
Electrochemical corrosion behavior of X80 pipeline steel in a near-neutral pH solution
- New search for: Xue, H.B.
- New search for: Cheng, Y.F.
- New search for: Xue, H.B.
- New search for: Cheng, Y.F.
In this work, the electrochemical corrosion behavior of X80 pipeline steel was investigated in a near-neutral pH solution using electrochemical impedance spectroscopy (EIC) and photo-electrochemical (PEC) measurements as well as X-ray photo-electron spectroscopy (XPS) technique. The effects of hydrogen-charging and stress were considered. The results show that the steel is in an active dissolution state, and a layer of corrosion product is formed and deposited on the electrode surface, which is subjected to further oxidation to form ferric oxide and hydroxide. Photo-illumination enhances anodic dissolution of the steel when it is under anodic polarization due to destroying of the corrosion product film. When the steel is under cathodic polarization, the cathodic current density decreases upon laser illumination due to the photo-oxidation of hydrogen atoms generated during cathodic reactions, which behaves as an anodic reaction to offset the cathodic current density. Hydrogen-charging and stress decrease the corrosion resistance of the steel and enhance the dissolution rate of the steel.
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Electrochemical corrosion behavior of X80 pipeline steel in a near-neutral pH solution
Elektrochemisches Korrosionsverhalten des Rohrstahles X80 in nahezu neutralen Medien
Materials and Corrosion ; 61 , 9 ; 756-761
2010
6 Seiten, 6 Bilder, 2 Tabellen, 34 Quellen
Article (Journal)
English