Comparison of the high-temperature chloride-induced corrosion between duplex steel and Ni based alloy in presence of H2S

被引：27

作者：

Schmid, Alexander ^{[1
]}

Mori, Gregor ^{[1
]}

Hoenig, Stefan ^{[2
]}

Weil, Matthias ^{[3
]}

Strobl, Susanne ^{[3
]}

Haubner, Roland ^{[3
]}

机构：

[1] Univ Leoben, A-8700 Leoben, Austria

[2] E&P GmbH, TECH Ctr & Lab, Protteserstr 40, A-2230 Ganserndorf, Austria

[3] Tech Univ Wien, A-1060 Vienna, Austria

来源：

CORROSION SCIENCE | 2018年 / 139卷

关键词：

High temperature corrosion; Steel; Ni based alloy; Hydrogen sulphide; Hydrogen chloride; HYDROGEN-CHLORIDE; GAS-MIXTURES; OXYGEN PRESSURES; ATMOSPHERES; BEHAVIOR; HCL; IRON;

D O I：

10.1016/j.corsci.2018.04.042

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Duplex steel 1.4462 and Ni-based alloy Centralloy ET45 micro were tested in HCl-and H2S-containing atmospheres at 680 degrees C for 24, 72 and 240 h. Corroded samples were investigated by metallography, SEM/EDX and XRD. Corrosion products on the surface consisted of Cr2O3 and chromium sulfides. Beneath this surface layer, iron and chromium chloride were found. A depletion of iron was observed due to formation of volatile iron chloride. Both materials displayed a selective attack of the existing phases. The ferrite phase of the Duplex steel was attacked, while the Ni-based alloy showed the selective attack of chromium carbides.

引用

页码：76 / 82

页数：7

共 18 条

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