Corrosion characteristics of a nickel-base alloy C-276 in harsh environments

被引：33

作者：

Li, Yanhui ^{[1
]}

Wang, Shuzhong ^{[1
]}

Yang, Jianqiao ^{[1
]}

Xu, Donghai ^{[1
]}

Guo, Yang ^{[1
,2
]}

Qian, Lili ^{[1
]}

Song, Wenhan ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Sch Energy & Power Engn, Key Lab Thermofluid Sci & Engn MOE, Xian 710049, Shaanxi, Peoples R China

[2] Xi An Jiao Tong Univ, Suzhou Acad, Suzhou 215123, Jiangsu, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2017年 / 42卷 / 31期

基金：

中国国家自然科学基金;

关键词：

Nickel-base alloy; C-276; High-temperature air; Supercritical water; Oxidation kinetic; Oxide scale; SUPERCRITICAL WATER; STAINLESS-STEEL; HYDROGEN-PRODUCTION; HIGH-TEMPERATURE; OXIDATION; BEHAVIOR;

D O I：

10.1016/j.ijhydene.2017.05.243

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The oxidation behaviors of alloy C-276 in two harsh environments: high-temperature air and supercritical water (SCW), respectively representing the working conditions of the external and internal surfaces of reactors for SCW gasification biomass to produce H-2, were investigated. In two environments, all oxidation kinetics followed parabolic laws, while the corrosion rate of alloy C-276 exposed to supercritical water gasification (SCWG) environments was 2.5-3 times higher than that in high-temperature air. The oxide scale formed in air at 500 degrees C consisted of an outer Fe-rich layer (Fe2O3 and NiCr2O4) and an inner layer of Cr2O3 and NiCr2O4, while the outer Fe-rich layer disappeared as the temperature increased to 550 degrees C. Compared to the scales formed on nickel-base alloys in near-pure SCW, the absence of NiO and Ni(OH)(2) phases within the scales formed on the C-276 samples in present SCWG environment may be due to higher molar proportion of hydrogen. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：19829 / 19835

页数：7

共 28 条

[1]

Allen TR, 2012, COMPREHENSIVE NUCLEAR MATERIALS, VOL 5: MATERIAL PERFORMANCE AND CORROSION/WASTE MATERIALS, P279

[2] Effect of dissolved oxygen content on the oxide structure of Alloy 625 in supercritical water environments at 700 °C [J].