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The corrosion at 600–800 °C of two iron-based alloys containing 15 and 30 wt% yttrium in H2H2S mixtures under 10−8 atm S2 was studied to establish whether yttrium additions can improve the sulfidation resistance of pure Fe. The presence of yttrium is beneficial, but not as much as expected. The corrosion rate of iron is considerably reduced by the yttrium addition, but the two alloys still corrode...
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