摘要
研究了Ni,Ni-5Ti, Ni-10Ti及 Ni-15Ti(质量分数,%,下同)合金在 650℃熔融(62Li-38K)2CO3(摩尔分数,%)中,空气气氛下的腐蚀行为.Ni-5Ti合金的腐蚀速度小于纯镍,表面形成Ni和Ti的混合氧化膜,Ni-10Ti和Ni-15Ti合金的腐蚀速度却明显高于纯镍,表面也形成了 Ni和 Ti的混合氧化膜,但沿原始合金中的TiNi3相发生了严重的Ti的内氧化.和纯镍相比, Ni-Ti合金表面氧化膜的生长速度明显减慢,讨论了合金腐蚀机制。
The corrosion behaviors of Ni, Ni-5Ti, Ni-10Ti and Ni-15Ti (mass fraction, %) in molten (Li62-K38)2CO3 at 650℃ under air have been studied. The corrosion of Ni-5Ti is slighter than that of pure Ni, yielding a mixed scale of Ni and Ti oxides. The corrosion rates of Ni-10Ti and Ni-15Ti are significantly higher than that of pure Ni, with the formation of an external scale containing Ni and Ti oxides, and a wide internal oxidation zone of Ti along the intermetallic compound phase TiNi3 in the original alloys. Compared with pure Ni, the growth of the external scale developed on Ni-Ti alloys is obviously reduced. The corrosion mechanism of the alloys was also discussed.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2000年第5期517-520,共4页
Acta Metallurgica Sinica
基金
国家自然科学基金!59971053