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Title: Effects of Chlorine in Ash on the Corrosion Performance of Ni-Based Alloys in a Simulated Oxy-Fuel Environment

Abstract

Coal ash can severely attack alloy materials at high temperature. To understand coal ash corrosion, a critical study is needed to determine the effect of the elements in ash on corrosion and find an approach to reduce the corrosion rates in an ash environment at high temperature. Chlorine is a harmful element in coal. The role of chlorine in ash corrosion is investigated in simulated oxy-fuel environments. Long time tests up to 3000 hours were performed on various structural alloys at 750°C. Detailed results are presented on weight change, scale thickness, internal penetration, microstructural characteristics of corrosion products, and the cracking of scales for the alloys after exposure at 750°C for 3000h. In addition, we performed synchrotron nanobeam Furthermore X-ray analysis to study the phase and chemical composition of the oxide layers on the alloy surface. Results from these studies are used to address the role of chlorine in ash in the long-term corrosion performance of alloys. Nanobeam X-ray and SEM analyses indicate that chlorine can modify the diffusion mechanism near alloy surface, and increase corrosion rate.

Authors:
ORCiD logo [1];  [1];  [1]; ORCiD logo [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Fossil Energy (FE)
OSTI Identifier:
1481860
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Energy and Fuels
Additional Journal Information:
Journal Volume: 32; Journal Issue: 10; Journal ID: ISSN 0887-0624
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; ash corrosion; chlorine; long term test; oxy-fuel

Citation Formats

Zeng, Zuotao, Natesan, Ken, Cai, Zhonghou, and Gosztola, David J. Effects of Chlorine in Ash on the Corrosion Performance of Ni-Based Alloys in a Simulated Oxy-Fuel Environment. United States: N. p., 2018. Web. doi:10.1021/acs.energyfuels.8b02233.
Zeng, Zuotao, Natesan, Ken, Cai, Zhonghou, & Gosztola, David J. Effects of Chlorine in Ash on the Corrosion Performance of Ni-Based Alloys in a Simulated Oxy-Fuel Environment. United States. https://doi.org/10.1021/acs.energyfuels.8b02233
Zeng, Zuotao, Natesan, Ken, Cai, Zhonghou, and Gosztola, David J. Thu . "Effects of Chlorine in Ash on the Corrosion Performance of Ni-Based Alloys in a Simulated Oxy-Fuel Environment". United States. https://doi.org/10.1021/acs.energyfuels.8b02233. https://www.osti.gov/servlets/purl/1481860.
@article{osti_1481860,
title = {Effects of Chlorine in Ash on the Corrosion Performance of Ni-Based Alloys in a Simulated Oxy-Fuel Environment},
author = {Zeng, Zuotao and Natesan, Ken and Cai, Zhonghou and Gosztola, David J.},
abstractNote = {Coal ash can severely attack alloy materials at high temperature. To understand coal ash corrosion, a critical study is needed to determine the effect of the elements in ash on corrosion and find an approach to reduce the corrosion rates in an ash environment at high temperature. Chlorine is a harmful element in coal. The role of chlorine in ash corrosion is investigated in simulated oxy-fuel environments. Long time tests up to 3000 hours were performed on various structural alloys at 750°C. Detailed results are presented on weight change, scale thickness, internal penetration, microstructural characteristics of corrosion products, and the cracking of scales for the alloys after exposure at 750°C for 3000h. In addition, we performed synchrotron nanobeam Furthermore X-ray analysis to study the phase and chemical composition of the oxide layers on the alloy surface. Results from these studies are used to address the role of chlorine in ash in the long-term corrosion performance of alloys. Nanobeam X-ray and SEM analyses indicate that chlorine can modify the diffusion mechanism near alloy surface, and increase corrosion rate.},
doi = {10.1021/acs.energyfuels.8b02233},
journal = {Energy and Fuels},
number = 10,
volume = 32,
place = {United States},
year = {2018},
month = {9}
}

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Free Publicly Available Full Text
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Figures / Tables:

Table 1 Table 1: Alloy nominal composition (in wt.%)

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Works referencing / citing this record:

High‐temperature corrosion behaviors of typical nickel alloy coatings in a simulated boiler coal ash/gas environment in the Zhundong region
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