The effect of adding dilute S on the corrosion resistance of Zr-0.70Sn-0.35Nb-0.30Fe alloy was investigated in lithiated water with 0.01 mol/L LiOH at 360 C/18.6 MPa by autoclave tests. The microstructures of the alloys and the oxide layers formed on the alloys were investigated by transmission electron microscope (TEM) and scanning electron microscope (SEM). Results showed that adding 5570 μg/g S degraded the corrosion resistance of Zr-0.70Sn-0.35Nb-0.30Fe alloy and the higher the S content was, the worse corrosion resistance was. Surface segregation of S and the precipitation of coarse Zr9S2 and Zr3Fe second phase particles accelerated the evolution of pores and micro-cracks formed by diffusion of defects in oxide layer, which leads to the bad corrosion resistance of Zr-0.70Sn-0.35Nb-0.30Fe-S alloy.
GAO Chang-yuan1,2, YAO Mei-yi1,2, XU Qi-di1,2,HUANG Jiao1,2, ZHANG Jin-long1,2, ZHOU Bang-xin1,2
. Corrosion resistance of Zr-0.70Sn-0.35Nb-0.30Fe-xS alloy in lithiated water at 360 C[J]. Journal of Shanghai University, 2015
, 21(2)
: 160
-169
.
DOI: 10.3969/j.issn.1007-2861.2014.05.011
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