研究了纯Fe、纯Y、Fe-15Y和Fe-30Y合金在600～800℃高硫压(10-3Pa)-低氧压(10-19Pa于600℃或10-15Pa于700℃和800℃)混合气中的腐蚀行为.Y在600℃和700℃发生加速腐蚀,但在800℃形成的腐蚀膜有保护性.加入Y能够降低合金的腐蚀速率,但在所有条件下,合金都形成FeS最外层膜、由两金属的化合物组成的中间层和由α-Fe和Y的硫氧化物的细微混合物所组成内硫化-氧化区.Fe似以相当高的速率穿过中间层形成FeS外层.在合金/氧化膜界面内侧不产生Y的贫化现象.从Y在Fe
Corrosion of Fe 15Y and Fe 30Y alloys and of pure Fe and Y at 600～800℃ in gas mixtures H 2 H 2S CO 2 has been studied. The gases provided sulfur pressure of 10-3Pa at 600～800℃ plus oxygen pressures 10-19Pa at 600℃ and 10-15Pa at 700～800℃. Yttrium
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