In this work, the HIC (hydrogen-induced cracking) behaviour of X100 pipeline steel was investigated by a combination of tensile test, electrochemical hydrogen permeation measurement and surface characterization techniques. The effect of inclusions in the steel on the crack initiation was analysed. Results demonstrated that the amount of hydrogen-charging into the X100 steel specimen increases with the charging time and charging current density. Hydrogen-charging will enhance the susceptibility of the steel to HIC. The cracks initiate primarily at inclusions, such as aluminium oxides, titanium oxides and ferric carbides, in the steel. The diffusivity of hydrogen at room temperature in X100 steel is determined to be 1.04x10-8 cm2/s.
Effects of hydrogen-charging on the susceptibility of X100 pipeline steel to hydrogen-induced cracking
International Journal of Hydrogen Energy ; 34 , 24 ; 9879-9884
2009
6 Seiten, 10 Bilder, 22 Quellen
Article (Journal)
English
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