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| Degradation of the chromia on Fe--15Cr--xAl alloy induced by KCl--ZnCl2 deposits |
| PAN Taijun 1 ; HU Jing 1 ; NIU Yan 2 |
1.Department of Materials Science and Engineering; Jiangsu Polytechnic University; Key Laboratory for Polymer Materials; Changzhou; 213164
2.State Key Laboratory for Corrosion and Protection; Institute of Metal Research; the Chinese Academy of Science; Shenyang 110016 |
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Cite this article:
PAN Taijun HU Jing NIU Yan. Degradation of the chromia on Fe--15Cr--xAl alloy induced by KCl--ZnCl2 deposits. Chin J Mater Res, 2009, 23(4): 347-351.
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Abstract The corrosion behavior of three Fe--15Cr--xAl(x=0, 5, 10%) alloys below KCl--ZnCl2 deposits in air was investigated at 600℃. Compared to their oxidation in air, all the alloys suffered from enhanced corrosion with the formation of non--protective porous scale, particularly in combination with internal attack of matrix. The corrosion rates decreased with increasing aluminum content. The effect of aluminum was mainly attributed to the enrichment of Al2O3 in the inner region of the scale, which may act as a barrier by retarding the rapid migration of the reactants.
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Received: 23 November 2008
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| Fund: Supported by National Natural Scientific Foundation of China No.50671114, the High Education Natural Scientific Foundation of Jiangsu Province No.08KJB430003, and the Science and Technology Project Foundation of Changzhou City No.CE2008089. |
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