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Effect of Hydrogen on Corrosion and Stress Corrosion Cracking of AZ91 Alloy in Aqueous Solutions
Chen, Jian; Wang, Jian-Qiu; Han, En-Hou; Kea, Wei; Shoesmith, D. W.; Chen, J (reprint author), Univ Western Ontario, Dept Chem, London, ON N6A 5B7, Canada.; Chen, J (reprint author), Univ Western Ontario, Surface Sci Western, London, ON N6G 0J3, Canada.
2016
发表期刊ACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN1006-7191
卷号29期号:1页码:1-7
摘要The effect of hydrogen on the corrosion and stress corrosion cracking of the magnesium AZ91 alloy has been investigated in aqueous solutions. Hydrogen produced by corrosion in water diffuses into, and reacts with the Mg matrix to form hydride. Some of the hydrogen accumulates at hydride/Mg matrix (or secondary phase) interfaces as a consequence of slow hydride formation and the incompatibility of the hydride with the Mg matrix (or secondary phase), and combines to form molecular hydrogen. This leads to the development of a local pressure at the hydride/Mg matrix (or secondary phase) interface. The expansion stress caused by hydride formation and the local hydrogen pressure due to its accumulation result in brittle fracture of hydride. These two combined effects promote both the corrosion rate of the AZ91 alloy, and crack initiation and propagation even in the absence of an external load. Hydrogen absorption leads to a dramatic deterioration in the mechanical properties of the AZ91 alloy, indicating that hydrogen embrittlement is responsible for transgulanar stress corrosion cracking in aqueous solutions.
部门归属[chen, jian ; shoesmith, d. w.] univ western ontario, dept chem, london, on n6a 5b7, canada ; [chen, jian ; shoesmith, d. w.] univ western ontario, surface sci western, london, on n6g 0j3, canada ; [wang, jian-qiu ; han, en-hou ; kea, wei] chinese acad sci, key lab nucl mat & safety assessment, inst met res, shenyang 110016, peoples r china
关键词Az91 Alloy Corrosion Hydrogen Secondary Ion Mass Spectroscopy (Sims) Transgulanar Stress Corrosion Cracking (Tgscc)
学科领域Metallurgy & Metallurgical Engineering
资助者Hundred Talent Program of the Chinese Academy of Sciences; National Natural Science Foundation of China [50499336]; National Basic Research Program of China [2007CB613705]
收录类别sci
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/75961
专题中国科学院金属研究所
通讯作者Chen, J (reprint author), Univ Western Ontario, Dept Chem, London, ON N6A 5B7, Canada.; Chen, J (reprint author), Univ Western Ontario, Surface Sci Western, London, ON N6G 0J3, Canada.
推荐引用方式
GB/T 7714
Chen, Jian,Wang, Jian-Qiu,Han, En-Hou,et al. Effect of Hydrogen on Corrosion and Stress Corrosion Cracking of AZ91 Alloy in Aqueous Solutions[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2016,29(1):1-7.
APA Chen, Jian.,Wang, Jian-Qiu.,Han, En-Hou.,Kea, Wei.,Shoesmith, D. W..,...&Chen, J .(2016).Effect of Hydrogen on Corrosion and Stress Corrosion Cracking of AZ91 Alloy in Aqueous Solutions.ACTA METALLURGICA SINICA-ENGLISH LETTERS,29(1),1-7.
MLA Chen, Jian,et al."Effect of Hydrogen on Corrosion and Stress Corrosion Cracking of AZ91 Alloy in Aqueous Solutions".ACTA METALLURGICA SINICA-ENGLISH LETTERS 29.1(2016):1-7.
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