Effect of ammonium chloride on corrosion behavior of Ni-based alloys and stainless steel in supercritical water gasification process

被引：41
|
作者：
Yang, Jianqiao [1 ]
Wang, Shuzhong [1 ]
Xu, Donghai [1 ]
Guo, Yang [1 ,2 ]
Yang, Chuang [1 ]
Li, Yanhui [1 ]
机构：
[1] Xi An Jiao Tong Univ, Key Lab Thermo Fluid 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：
Ni-based alloy; Stainless steel; Supercritical water gasification; Ammonium chloride; Corrosion; AQUEOUS-SOLUTIONS; HIGH-TEMPERATURE; DISSOLVED HYDROGEN; OXIDE-FILM; NICKEL; MOLYBDENUM; OXIDATION; CHROMIUM; OXYGEN; PH;
D O I：
10.1016/j.ijhydene.2017.05.078
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 corrosion behavior of 316 SS and three Ni-based alloys 625, 600 and 800 was evaluated by exposing in SCW at 400 degrees C and 24 MPa with 6000 ppm NH4Cl for 70 h. Various of analytical techniques were used for corrosion analysis. 316 SS underwent severe corrosion attack for general corrosion, pitting corrosion and intergranular attack. Inconel 625 showed the best corrosion resistance in the test environment. Fe oxides and spinel were identified by XRD on all of the SCW-exposed samples. Trace amounts of NiO was also identified on the surface of samples, however, Ni was selectively dissolved and depleted in oxide films, and nickel ammine may form at the relatively low temperature during the heating and cooling process. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：19788 / 19797
页数：10
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