Effect and role of alloyed yttrium on the fireside corrosion behaviour of Ni-Fe based alloys for 750 °C ultra-supercritical boiler applications

被引：11

作者：

Xu, Ya-Xin ^{[1
]}

Lu, Jin-Tao ^{[2
]}

Li, Wen-Ya ^{[1
]}

Yang, Zhen ^{[2
]}

Dang, Ying-Ying ^{[2
]}

Yang, Xia-Wei ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Shanxi Key Lab Frict Welding Technol, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China

[2] Xian Thermal Power Res Inst Co Ltd, Natl Energy R&D Ctr Clean & High Efficiency Fossi, Xingqing Rd 136, Xian 710032, Shaanxi, Peoples R China

来源：

CORROSION SCIENCE | 2018年 / 143卷

基金：

中国国家自然科学基金;

关键词：

Superalloys; Rare earth elements; SEM; TEM; High-temperature corrosion; Oxidation; Sulphidation; HIGH-TEMPERATURE OXIDATION; GRAIN-BOUNDARIES; COAL ASH; SULFIDATION BEHAVIOR; HOT CORROSION; POWER-PLANTS; OXIDE SCALES; WATER-VAPOR; SUPERALLOY; STEEL;

D O I：

10.1016/j.corsci.2018.08.025

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of alloyed yttrium (0.15-0.3 wt.%) on the fireside corrosion behaviour of Ni-Fe based alloy was investigated at 750 degrees C. Results show that external scales of Cr2O3 and Al oxide, as well as internal Ti sulphide form during the corrosion regardless of the chemical composition of alloys. However, the scale thickness and corrosion rate are reduced by the alloyed-yttrium, e.g. the mass gain of 0.3 wt.% yttrium-contained alloy after 50 h corrosion is similar to 60% the value of the yttrium-free alloy. The yttrium doping in Cr sulphide particles in oxide scales most likely accounts for such a positive effect.

引用

页码：148 / 156

页数：9

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