Effects of the precipitation of secondary phases on the erosion-corrosion of 25% Cr duplex stainless steel

다국어 초록 (Multilingual Abstract)

<P><B>Abstract</B></P> <P>This study examined the effect of aging at 850 °C on the precipitation of secondary phases and the resultant erosion-corrosion behavior of 25% Cr duplex stainless steels (DSS). An aging time of 30 min, which led to a ratio of reactivation current to activation current (<I>i<SUB>r</SUB>/i<SUB>a</SUB> </I> × 100) of ˜1% in a DL-EPR test and a current density of ˜0.8 mA cm<SUP>−2</SUP> at 9 m s<SUP>−1</SUP> in a jet impingement test, is regarded as a boundary aging condition for erosion-corrosion. Further, the current density response of ˜0.8 mA cm<SUP>−2</SUP> can be considered a criterion for the surface depassivation resulting from erosion-corrosion.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The effects of aging at 850 °C on the precipitation of secondary phases and the erosion-corrosion behavior of 25% Cr duplex stainless steel were studied. </LI> <LI> An aging time of 30 min is regarded as a boundary aging condition for erosion-corrosion. </LI> <LI> A current density response of ˜0.8 mA cm<SUP>−2</SUP> is considered to be a criterion for surface depassivation after the initial erosion-corrosion. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>