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

Ya Xin Xu; Jin Tao Lu; Wen Ya Li; Zhen Yang; Ying Ying Dang; Xia Wei Yang

doi:10.1016/j.corsci.2018.08.025

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

Ya Xin Xu, Jin Tao Lu, Wen Ya Li, Zhen Yang, Ying Ying Dang, Xia Wei Yang

School of Materials Sience and Engineering

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

The influence of alloyed yttrium (0.15–0.3 wt.%) on the fireside corrosion behaviour of Ni-Fe based alloy was investigated at 750 °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 ∼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.

Original language	English
Pages (from-to)	148-156
Number of pages	9
Journal	Corrosion Science
Volume	143
DOIs	https://doi.org/10.1016/j.corsci.2018.08.025
State	Published - Oct 2018

Keywords

A. Rare earth elements
A. Superalloys
B. SEM
B. TEM
C. High-temperature corrosion
C. Oxidation
C. Sulphidation

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10.1016/j.corsci.2018.08.025

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

abstract = "The influence of alloyed yttrium (0.15–0.3 wt.%) on the fireside corrosion behaviour of Ni-Fe based alloy was investigated at 750 °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 ∼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.",

keywords = "A. Rare earth elements, A. Superalloys, B. SEM, B. TEM, C. High-temperature corrosion, C. Oxidation, C. Sulphidation",

author = "Xu, {Ya Xin} and Lu, {Jin Tao} and Li, {Wen Ya} and Zhen Yang and Dang, {Ying Ying} and Yang, {Xia Wei}",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2018",

month = oct,

doi = "10.1016/j.corsci.2018.08.025",

language = "英语",

volume = "143",

pages = "148--156",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier Ltd",

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TY - JOUR

T1 - Effect and role of alloyed yttrium on the fireside corrosion behaviour of Ni-Fe based alloys for 750 °C ultra-supercritical boiler applications

AU - Xu, Ya Xin

AU - Lu, Jin Tao

AU - Li, Wen Ya

AU - Yang, Zhen

AU - Dang, Ying Ying

AU - Yang, Xia Wei

PY - 2018/10

Y1 - 2018/10

N2 - The influence of alloyed yttrium (0.15–0.3 wt.%) on the fireside corrosion behaviour of Ni-Fe based alloy was investigated at 750 °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 ∼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.

AB - The influence of alloyed yttrium (0.15–0.3 wt.%) on the fireside corrosion behaviour of Ni-Fe based alloy was investigated at 750 °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 ∼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.

KW - A. Rare earth elements

KW - A. Superalloys

KW - B. SEM

KW - B. TEM

KW - C. High-temperature corrosion

KW - C. Oxidation

KW - C. Sulphidation

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U2 - 10.1016/j.corsci.2018.08.025

DO - 10.1016/j.corsci.2018.08.025

M3 - 文章

AN - SCOPUS:85051623934

SN - 0010-938X

VL - 143

SP - 148

EP - 156

JO - Corrosion Science

JF - Corrosion Science

ER -

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

Abstract

Keywords

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