Hydrogen embrittlement of high strength pipeline steels
Hydrogen embrittlement of high strength pipeline steels
- Neue Suche nach: Hardie, D.
- Neue Suche nach: Charles, E.A.
- Neue Suche nach: Lopez, A.H.
- Neue Suche nach: Hardie, D.
- Neue Suche nach: Charles, E.A.
- Neue Suche nach: Lopez, A.H.
A comparison was made between three API grade pipeline steels (X60, X80 and the X100 grade) from the point of view of their susceptibility to hydrogen embrittlement. The main aim was to determine whether the development of higher strength materials led to greater susceptibility to hydrogen embrittlement. This was achieved by straining at 2.8 x 10-5 s-1 after cathodic charging in 0.5 M sulphuric acid solution containing 0.5 g/l of potassium arsenate, KH2AsO4. The results showed that there is a distinct susceptibility to loss of ductility after charging and this tends to increase with the strength level of the steel at a charging current density above 0.44 mA mm-2. All three steels exhibited fine cracks parallel to the major rolling direction after charging and an increasing amount of brittleness on the fracture surface. These observations suggest that control of cathodic protection systems may be more critical on highstrength steel pipelines.
Dokumentinformationen
Hydrogen embrittlement of high strength pipeline steels
Wasserstoffversprödung von hochfesten Rohrstählen
Corrosion Science ; 48 , 12 ; 4378-4385
2006
8 Seiten, 4 Bilder, 1 Tabelle, 17 Quellen
Aufsatz (Zeitschrift)
Englisch
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