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High Temperature Materials and Processes

Editor-in-Chief: Fukuyama, Hiroyuki

Editorial Board: Waseda, Yoshio / Fecht, Hans-Jörg / Reddy, Ramana G. / Manna, Indranil / Nakajima, Hideo / Nakamura, Takashi / Okabe, Toru / Ostrovski, Oleg / Pericleous, Koulis / Seetharaman, Seshadri / Straumal, Boris / Suzuki, Shigeru / Tanaka, Toshihiro / Terzieff, Peter / Uda, Satoshi / Urban, Knut / Baron, Michel / Besterci, Michael / Byakova, Alexandra V. / Gao, Wei / Glaeser, Andreas / Gzesik, Z. / Hosson, Jeff / Masanori, Iwase / Jacob, Kallarackel Thomas / Kipouros, Georges / Kuznezov, Fedor


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Open Access
Online
ISSN
2191-0324
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Volume 32, Issue 3

Issues

Hot Corrosion of Co-based Alloys with 25%NaCl+75%Na2SO4 Coating at 1173 K

Guangyan Fu
  • College of Mechanical Engineering, Shenyang University of Chemical Technology, Shenyang, Liaoning 110142, China
  • Other articles by this author:
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/ Xingxing Guo
  • College of Mechanical Engineering, Shenyang University of Chemical Technology, Shenyang, Liaoning 110142, China
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/ Qun Liu
  • College of Mechanical Engineering, Shenyang University of Chemical Technology, Shenyang, Liaoning 110142, China
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/ Xin Zhao
  • College of Mechanical Engineering, Shenyang University of Chemical Technology, Shenyang, Liaoning 110142, China
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/ Yong Su
  • Corresponding author
  • College of Mechanical Engineering, Shenyang University of Chemical Technology, Shenyang, Liaoning 110142, China
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Published Online: 2013-06-15 | DOI: https://doi.org/10.1515/htmp-2012-0134

Abstract

Hot corrosion behavior of pure Co, Co-10Cr and Co-10Cr-5Al alloys in the presence of a salt coat of Na2SO4+NaCl in air at 1173 K was studied. The results indicated that among the three samples, the mass gain of Co-10Cr-5Al alloy is the smallest, while that of Co-10Cr is biggest. The corrosion products of Co-10Cr-5Al can be divided into three layers, of which the outside layer is CoO, the middle layer consists of Cr2O3 and Al2O3, and the inside layer is a small amount of Chromium sulfide and aluminum sulfide. The corrosion products of Co-10Cr can also be divided into three layers, from the outermost to the innermost layer are CoO, Cr2O3, and small amount of Cr2S3. The corrosion resistance of Co-10Cr-5Al alloy is better than that of Co-10Cr alloy.

Keywords: Co-based alloys; Na2SO4+25%NaCl salt film; hot corrosion

About the article

Received: 2012-08-14

Accepted: 2012-11-24

Published Online: 2013-06-15

Published in Print: 2013-06-14


Citation Information: High Temperature Materials and Processes, Volume 32, Issue 3, Pages 317–321, ISSN (Online) 2191-0324, ISSN (Print) 0334-6455, DOI: https://doi.org/10.1515/htmp-2012-0134.

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©[2013] by Walter de Gruyter Berlin Boston.Get Permission

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