A first quantitative XPS study of the surface films formed, by exposure to water, on Mg and on the Mg-Al intermetallics: Al3Mg2 and Mg17Al12

被引：249

作者：

Liu, Ming ^{[1
,2
,3
]}

Zanna, Sandrine ^{[3
]}

Ardelean, Helene ^{[3
]}

Frateur, Isabelle ^{[3
]}

Schmutz, Patrik ^{[2
]}

Song, Guangling ^{[1
]}

Atrens, Andrej ^{[1
,2
,3
]}

Marcus, Philippe ^{[3
]}

机构：

[1] Univ Queensland, Div Mat, Brisbane, Qld 4072, Australia

[2] EMPA, Swiss Fed Labs Mat Testing & Res, CH-8600 Dubendorf, Switzerland

[3] ENSCP, CNRS, UMR 7045, Lab Physicochim Surfaces, F-75005 Paris, France

来源：

CORROSION SCIENCE | 2009年 / 51卷 / 05期

基金：

澳大利亚研究理事会;

关键词：

Magnesium; Intermetallics; XPS; Surface films; Dealloying; STRESS-CORROSION CRACKING; AZ91 MAGNESIUM ALLOY; IN-SITU OBSERVATION; OXIDE-FILMS; GALVANIC CORROSION; MICRO-DROPLETS; BEHAVIOR; SPECTROSCOPY; MORPHOLOGY; OXIDATION;

D O I：

10.1016/j.corsci.2009.02.017

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

An XPS investigation was carried out of the surface films, formed by exposure to ultrapure water, on mechanically ground Mg and the two Mg-Al intermetallic compounds: Al3Mg2 and Mg17Al12. The mechanically ground Mg surface had a film of MgO at the Mg metal surface covered by a Mg(OH)2 layer. formed by the reaction of the MgO with water vapour in the air. Upon immersion in ultrapure water, this film converted to a duplex film with an inner MgO layer next to the Mg metal and an external porous hydroxide layer. For both intermetallics, the XPS data is consistent with (i) preferential dissolution of Mg and (ii) a 10 nm thick film on the surface after immersion in ultrapure water; the film composition on Al3Mg2 was AlMg1.4O0.2(OH)(5.4) whilst on Mg17Al12 the composition was AlMg2.5(OH)(8). (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1115 / 1127

页数：13

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