铸造AZ91镁合金在CO32-/HCO3-体系中的应力腐蚀行为

中国腐蚀与防护学报

2010, Vol. 30

Issue (5): 347-353

研究报告

本期目录 | 过刊浏览

铸造AZ91镁合金在CO₃^2-/HCO₃^-体系中的应力腐蚀行为

黄发,陈健,王俭秋

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

STRESS CORROSION CRACKING BEHAVIORS OF AS-CAST AZ91 MAGNESIUM ALLOY IN CO₃^2-/HCO₃^- SOLUTIONS

HUANG Fa, CHEN Jian, WANG Jianqiu

State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016

全文: PDF(3305 KB)

摘要: 用电化学实验、浸泡实验与慢应变速率拉伸实验研究铸造AZ91 镁合金在不同浓度比例的CO₃^2-/HCO₃^-溶液体系中的应力腐蚀(SCC)行为。结果表明，随着溶液pH值的升高，AZ91 镁合金的应力腐蚀敏感性降低。点蚀是AZ91镁合金在该实验体系下的裂纹萌生源，随着实验时间的延长，萌生于点蚀底部的微裂纹会逐渐扩展形成主裂纹，主裂纹靠吞并其前端的微裂纹向前扩展，直至发生SCC失效。

关键词 ： AZ91镁合金, 应力腐蚀开裂, CO₃^2-/HCO₃^-溶液

Abstract：The stress corrosion cracking (SCC) behaviors of as-cast AZ91 magnesium alloy in CO₃^2-/HCO₃^- solutions were investigated by electrochemical test, immersion test and slow strain rate test (SSRT) respectively. The results showed that the stress corrosion cracking sensitivity of as-cast AZ91 alloy in CO₃^2-/HCO₃^- solutions decreased with the increase of pH values of the solutions. The surface was covered by a film mainly composed of Mg(OH)₂ and Al(OH)₃. Al(OH)₃ could be dissolved in alkaline solutions and AlO₂^- engendered. Pitting was the main crack source of AZ91 alloy in such solutions. The cracking of β phase also resulted in microcracks in the matrix. Microcracks initiating at the bottom of pitting combined into a main crack. The main crack propagated by coalescence of the existing microcracks ahead until the SCC fracture occurred.

Key words： AZ91 magnesium alloy stress corrosion cracking CO₃^2-/HCO₃^- solution

收稿日期: 2009-09-28

ZTFLH:

TG172.6

基金资助:

国家自然科学基金项目(50499336)资助

通讯作者: 王俭秋 E-mail: wangjianqiu@imr.ac.cn

Corresponding author: WANG Jianqiu E-mail: wangjianqiu@imr.ac.cn

作者简介: 黄发，女，1985年生，硕士生，研究方向为金属腐蚀与防护

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引用本文:

黄发,陈健,王俭秋. 铸造AZ91镁合金在CO₃^2-/HCO₃^-体系中的应力腐蚀行为[J]. 中国腐蚀与防护学报, 2010, 30(5): 347-353.
HUANG Fa, CHEN Jian, YU Jian-Qiu. STRESS CORROSION CRACKING BEHAVIORS OF AS-CAST AZ91 MAGNESIUM ALLOY IN CO₃^2-/HCO₃^- SOLUTIONS. J Chin Soc Corr Pro, 2010, 30(5): 347-353.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2010/V30/I5/347

[1] Liu Z, Zhang K, Zeng X Q. Theory and Application of Mg-based Light Alloy [M]. Beijing: China Machine Press, 2002 (刘正, 张奎, 曾小勤. 镁基轻质合金理论基础及其应用 [M].北京：机械工业出版社, 2002) [2] Wang F P, Li X G, Lin C, et al.Atmospheric corrosion behavior of AZ91D magnesium alloy in Beijing area [J]. J. Chin. Soc. Corros. Prot., 2004, 24(6): 345-349 (王凤平, 李晓刚, 林翠等. AZ91D 镁合金在北京地区的大气腐蚀行为研究 [J]. 中国腐蚀与防护学报, 2004, 24(6): 345-349) [3] Lin C, Li X G. Initial corrosion of AZ91D magnesium alloy in atmosphere containing SO₂ [J]. Chin. J. Nonferrous Met., 2004,14(10): 1658-1665 (林翠, 李晓刚. AZ91D 镁合金在含 SO₂大气环境中的初期腐蚀行为 [J]. 中国有色金属学报, 2004, 14(10): 1658-1665) [4] Chen J, Wang J Q, Han E H, et al. Effects of dust and salt particles on the formation and spreading of micro-droplets [J].Corros. Sci., 2008, 50 (5): 1449-1459 [5] Chen J, Wang J Q, Han E H,et al. In situ observation of the formation and spreading of micro-droplets on magnesium and its alloys under wet-dry condition [J]. Corros. Sci., 2007, 49(3): 1625-1634 [6] Wu Z N, Li P J, Liu S X, et al. The actuality of study in magnesium corrosion [J]. Foundry,2001, 50(10): 583-586 (吴振宁, 李培杰, 刘树勋等. 镁合金腐蚀问题研究现状 [J]. 铸造, 2001, 50(10): 583-586) [7] Chen J, Wang J Q, Han E H, et al. Corrosion behavior of AZ91D magnesium alloy in sodium sulfate solution [J]. Mater. Corros.,2005, 57(10): 789-793 [8] Chen J, Wang J Q, Han E H, et al. Effect of hydrogen on stress corrosion cracking of magnesium alloy in 0.1 M Na₂SO₄ solution [J]. Mater. Sci. Eng., 2008, A 488(1-2): 428-434 [9] Gulbrandsen E. Anodic behaviour of Mg in HCO₃^-/CO₃^2- buffer solutions. Quasi-steady measurements [J]. Electrochem.Acta, 1992, 37(8): 1403-1412 [10] Vermilyea D A, Kirk C F. Study of inhibition of magnesium corrosion [J]. J. Electrochem. Soc., 1969, 116(11): 1487-1492 [11] Fairman L, West J M. Stress corrosion cracking of a magnesium aluminium alloy [J]. Corros. Sci., 1965, 5(10): 711-716 [12] Chen J, Wang J Q, Han E H, et al. States and transport of hydrogen in the corrosion process of AZ91 magnesium alloy in aqueous solution [J]. Corros. Sci., 2008, 50(5): 1292-1305 [13] Pourbaix M. Atlas d' Equilibres Electrochimiques [M]. Paris: Gauthier Villars, 1963 [14] Song G L. Corrosion and Protection of Magnesium Alloy [M]. Beijing: Chemical Industry Press, 2006 　　 (宋光铃. 镁合金腐蚀与防护 [M]. 北京：化学工业出版社, 2006) [15] Lide D R. Handbook of Chemistry and Physics [M]. CRC press, 2003 [16] Zhang X Y. Handbook of Practical Chemistry [M]. Beijing: National Defense Industry Press, 1986 (张向宇. 实用化学手册 [M]. 北京：国防工业出版社, 1986)

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