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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
Source PublicationACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN1006-7191
Volume29Issue:1Pages:1-7
AbstractThe 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.
description.department[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
KeywordAz91 Alloy Corrosion Hydrogen Secondary Ion Mass Spectroscopy (Sims) Transgulanar Stress Corrosion Cracking (Tgscc)
Subject AreaMetallurgy & Metallurgical Engineering
Funding OrganizationHundred Talent Program of the Chinese Academy of Sciences; National Natural Science Foundation of China [50499336]; National Basic Research Program of China [2007CB613705]
Indexed Bysci
Language英语
WOS IDWOS:000374615600001
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/75961
Collection中国科学院金属研究所
Corresponding AuthorChen, 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.
Recommended Citation
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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