The sulfidation of a Cu-15 vol.% Nb alloy in H2-H2S mixtures at 400-600°C

被引：3
|
作者：
Niu, Y
Gesmundo, F
Douglass, DL
Viani, F
机构：
[1] Univ Genoa, Fac Ingn, Ist Chim, I-16129 Genoa, Italy
[2] CAS, Inst Corros & Protect Met, State Key Lab Corros & Protect, Shenyang, Peoples R China
[3] Univ Arizona, Arizona Mat Lab, Tucson, AZ 85712 USA
来源：
OXIDATION OF METALS | 1998年 / 49卷 / 1-2期
关键词：
niobium; copper; sulfidation;
D O I：
10.1023/A:1018857703098
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The corrosion of a Cu-15 vol.% Nb alloy by H-2-H2S mixtures has been studied under 10(-12) atm S-2 at 400 and 500 degrees C and under 10(-10) atm S-2 at 500 and 600 degrees C. The alloy is a two-phase mixture of the two terminal solid solutions and is composed of a Cu-rich matrix containing particles of the Nb-rich phase elongated parallel to the sample surface and isolated mainly from each other. The alloy corroded at rates similar to those of pure copper at 400 and 500 degrees C under 10(-12) atm S-2, but more slowly than pure copper at 500 and 600 degrees C under 10(-10) atm S-2. The scales were duplex, containing an external layer of pure copper sulfide and an inner very porous region composed of a mixture of sulfides of the two metals in which, however, the core of the large Nb particles was still uncorroded.
引用
收藏
页码：169 / 186
页数：18
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