High-Temperature Corrosion of Ti-46Al-6Nb-0.5W-0.5Cr-0.3Si-0.1C Alloy in N2/0.1%H2S Gas

被引：8

作者：

Yuke, Shi ^{[1
]}

Kim, Seong Woong ^{[2
]}

Hahn, Junhee ^{[3
]}

Lee, Dong Bok ^{[1
]}

机构：

[1] Sungkyunkwan Univ, Sch Adv Mat Sci & Engn, Suwon 16419, South Korea

[2] Korea Inst Mat Sci, Titanium Dept, Chang Won 51508, South Korea

[3] Korea Res Inst Stand & Sci, Ctr Energy Mat Metrol, Daejon 34113, South Korea

来源：

OXIDATION OF METALS | 2019年 / 91卷 / 5-6期

关键词：

Titanium aluminides; TiAl; H2S-corrosion; Oxidation; Sulfidation; OXIDATION BEHAVIOR; TITANIUM ALUMINIDES; SULFIDATION; RESISTANCE; TI2ALN; AIR; MN; NB; SI;

D O I：

10.1007/s11085-019-09902-4

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Ti-46Al-6Nb-0.5W-0.5Cr-0.3Si-0.1C alloy was corroded at 800-1100 degrees C for 200h in N-2/0.1%H2S gas to characterize its corrosion behavior inan aggressive H2S-containing environment. The alloy displayed superior corrosion resistance because Ti and Al preferentially reacted with impurity oxygen in the gas to form TiO2 and Al2O3. It corroded primarily by outward diffusion of Ti, Al, W, and Cr in addition to inward transport of sulfur, nitrogen, and oxygen. Scales were adherent and consisted of an outer TiO2 layer, an intermediate Al2O3 layer, and an inner (TiO2, Al2O3)-mixed layer. TiN and Ti2AlN formed at the scale/matrix interface where sulfur, Nb, W, and Cr segregated.

引用

页码：677 / 689

页数：13

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