The growth behavior of stress corrosion cracks of X8O pipeline steel in the underground water of acidic soil environments was investigated by a slow-rate-loading crack growth test, electrochemical polarization curves, electrochemical impedance spectroscopy, and scanning electron microscopy. Crack growth mechanism was mixed-controlled by both anodic dissolution and hydrogen involvement. Ductile cracking first occurred and crack growth was primarily based on the anodic dissolution mechanism. Crack propagation gradually changed from ductile cracking to brittle cracking. Crack growth rate significantly accelerated with decreasing solution pH; crack propagation followed a hydrogen-based mechanism during the quick crack propagation stage.
Growth behavior of stress corrosion cracks of X80 pipeline steel in underground water of acidic soil
Corrosion, Houston ; 70 , 9 ; 872-879
2014
8 Seiten, Bilder, Tabellen, 16 Quellen
Article (Journal)
English