Fe-Al合金在KCl-ZnCl<sub>2</sub>沉积盐作用下的加速腐蚀行为

中国腐蚀与防护学报

2010, Vol. 30

Issue (1): 58-61

研究报告

本期目录 | 过刊浏览

Fe-Al合金在KCl-ZnCl₂沉积盐作用下的加速腐蚀行为

潘太军^1;2;林一凡¹;胡静¹

1. 江苏工业学院材料科学与工程学院常州 213164
2. 中国科学院金属研究所金属腐蚀与防护国家重点实验室沈阳 110016

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

全文: PDF(1014 KB)

摘要:

研究了Fe-Al合金在500℃空气中ZnCl₂-KCl盐膜下的腐蚀行为。结果表明，与无盐膜氧化实验相比，合金在盐膜下发生了加速腐蚀，表面生成了疏松多孔的腐蚀产物，基体产生内腐蚀，其中Fe-25Al合金表面氧化铝膜甚至发生退化。合金加速腐蚀是由于腐蚀过程中氯化物沉积盐与合金表面的氧化膜反应产生氯所致。腐蚀随合金中Al含量的增加而减轻。基于热力学相图预测了合金在盐膜下可能发生的反应，并解释了合金发生加速腐蚀的机制。

关键词 ： Fe-Al, 退化, 内氧化, 加速腐蚀

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.

收稿日期: 2009-05-12

ZTFLH:

TG174.4

基金资助:

江苏省高校自然科学基金（08KJB430003）和常州市工业科技攻关项目（CE2008089）资助

通讯作者: 潘太军 E-mail: tjpan2005@gmail.com

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

作者简介: 潘太军，男，1977年生，博士，副教授，研究方向为材料腐蚀与防护

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引用本文:

潘太军;林一凡;胡静. Fe-Al合金在KCl-ZnCl₂沉积盐作用下的加速腐蚀行为[J]. 中国腐蚀与防护学报, 2010, 30(1): 58-61.
PAN Ta-Jun. ACCELERATED CORROSION BEHAVIOR OF Fe-Al ALLOYS UNDER KCl-ZnCl₂ DEPOSITS. J Chin Soc Corr Pro, 2010, 30(1): 58-61.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2010/V30/I1/58

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