ACCELERATED CORROSION BEHAVIOR OF Fe-Al ALLOYS UNDER KCl-ZnCl2 DEPOSITS

J Chin Soc Corr Pro

2010, Vol. 30

Issue (1): 58-61 DOI:

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ACCELERATED CORROSION BEHAVIOR OF Fe-Al ALLOYS UNDER KCl-ZnCl₂ DEPOSITS

PAN Taijun^1;2; LIN Yifan¹; HU Jing¹

1. Department of Materials Science and Engineering; Jiangsu Polytechnic University;Changzhou 213164
2. State Key Laboratory for Corrosion and Protection; Institute of Metal Research;Chinese Academy of Sciences; Shenyang 110016

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Abstract

The corrosion behavior of Fe-Al alloys below KCl-ZnCl₂ deposits in air was investigated at 500℃. Compared to their oxidation in air without salt deposits, all the examined alloys below chloride deposits experienced accelerated corrosion characterized by formation of porous corrosion products plus internal attack of matrix, particularly the degradation of alumina on Fe-25Al alloy. The enhanced corrosion was attributed to then formation of chlorine from the reaction of chlorides in the deposit with the oxide scale of alloy. The corrosion rate decreased with increasing Al content. The possible reactions between alloy component and chloride compounds were predicted on basis of phasestability diagrams and the mechanism on accelerated corrosion was also interpreted.

Received: 12 May 2009

ZTFLH:

TG174.4

Corresponding Authors: PAN Taijun E-mail: tjpan2005@gmail.com

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Cite this article:

PAN Taijun; LIN Yifan; HU Jing. ACCELERATED CORROSION BEHAVIOR OF Fe-Al ALLOYS UNDER KCl-ZnCl₂ DEPOSITS. J Chin Soc Corr Pro, 2010, 30(1): 58-61.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2010/V30/I1/58

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