研究了含15wt％Ce的Co-15Ce合金及纯Ce、纯Co在600℃、H_2-H_2S中的腐蚀行为,介质的硫分压为10~(-8)atm。结果表明,Co-15Ce合金的腐蚀速度比纯Co慢得多,但高于纯Ce。Co-15Ce合金腐蚀后形成复杂的腐蚀产物膜,最外层为纯Co的硫化物层,其下为Ce的硫化物与Co的硫化物的混合物层,内层为Ce的硫化物与金属Co的混合物。15％Ce不足以阻止基体金属Co的硫化腐蚀,这可能与Ce在Co中有限的溶解度及富Ce第二相的出现有关。 The corrosion behavior of Co-15Ce alloy with pure Ce and pure Ce at 600 ℃ and H_2-H_2S was investigated. The partial pressure of sulfur in the medium was 10 -8 atm. The results show that the corrosion rate of Co-15Ce alloy is much slower than that of pure Co, but higher than that of pure Ce. Co-15Ce alloy corrosion after the formation of a complex corrosion film, the outermost pure Co sulfide layer, which is under the Ce sulfide and Co sulfide mixture, the inner layer of Ce sulfide and metal Co mixture. 15% Ce is not enough to prevent the sulfide corrosion of the base metal Co, which may be related to the limited solubility of Ce in Co and the appearance of Ce-rich second phase.