High temperature corrosion of Hastelloy C22 in molten alkali salts: The effect of pre-oxidation treatment

被引：37

作者：

Abu Kassim, Syamimi ^{[1
]}

Thor, Jin Ann ^{[1
]}

Abu Seman, Anasyida ^{[1
]}

Abdullah, Tuti Katrina ^{[1
]}

机构：

[1] Univ Sains Malaysia, Sch Mat & Minerals Resources Engn, Engn Campus, Nibong Tebal 14300, Pulau Pinang, Malaysia

来源：

CORROSION SCIENCE | 2020年 / 173卷

关键词：

Hastelloy C22; Pre-Oxidation; High temperature corrosion; Molten alkali salt; ISOTHERMAL OXIDATION BEHAVIOR; NICKEL-BASED SUPERALLOY; KCL-INDUCED CORROSION; NI-BASED ALLOYS; STAINLESS-STEEL; HOT CORROSION; CHROMIA VOLATILIZATION; METALLIC CHROMIUM; FECRAL ALLOY; DEGREES-C;

D O I：

10.1016/j.corsci.2020.108761

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The optimum protective oxide layer was expected to provide protection and reduce the corrosion damage of superheater material. The corrosion behaviour of raw and pre-oxidised Hastelloy C22 was investigated by exposing the selected samples to molten alkali salts (95.5 wt% KCl +4.5 wt% NaCl) at 700 degrees C for 100 h. The preoxidised Hastelloy C22 exhibited better corrosion resistance than raw Hastelloy C22 during exposure to molten alkali salt. The pre-oxidation treatment delayed the penetration of the corrosive reagent into the superalloy substrate. Schematic models of oxidation behaviour and corrosion mechanism in molten salts were presented in this work.

引用

页数：13

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