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

Journal Article · · Energy and Fuels
 [1];  [1];  [1];  [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States)
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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.
Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Fossil Energy (FE)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1481860
Journal Information:
Energy and Fuels, Journal Name: Energy and Fuels Journal Issue: 10 Vol. 32; ISSN 0887-0624
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (1)

High‐temperature corrosion behaviors of typical nickel alloy coatings in a simulated boiler coal ash/gas environment in the Zhundong region journal January 2020

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Related Subjects

01 COAL, LIGNITE, AND PEAT
36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ash corrosion
chlorine
long term test
oxy-fuel