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Project

Investigation of the role of alloying elements and hydrogen in the mechanical degradation of steam turbine steel due to stress-corrosion cracking in acidic water

Steam turbine steels, e.g. 3.5NiCrMoV steel, are susceptible to stress-corrosion cracking (SCC). To evaluate the role of the different alloying elements and the presence of a hydrogen-assisted SCC mechanism, generic Fe-C-X (X=Ni/Cr/Mo/V) steels are mechanically tested with in-situ cathodic polarization in an acidic, aqueous environment at an elevated temperature. Crack formation, ductility loss and corrosion product formation are evaluated.

Date:1 Oct 2017 →  30 Sep 2021
Keywords:stress-corrosion cracking, steam turbine steel, mechanical degradation
Disciplines:Metallurgical engineering