On the capability of in-situ exposure in an environmental scanning electron microscope for investigating the atmospheric corrosion of magnesium

被引：18

作者：

Esmaily, M. ^{[1
]}

Mortazavi, N. ^{[2
]}

Shahabi-Navid, M. ^{[1
]}

Svensson, J. E. ^{[1
]}

Johansson, L. G. ^{[1
]}

Halvarsson, M. ^{[2
]}

机构：

[1] Chalmers, Dept Chem & Biol Engn, SE-41296 Gothenburg, Sweden

[2] Chalmers, Dept Appl Phys, SE-41296 Gothenburg, Sweden

来源：

ULTRAMICROSCOPY | 2015年 / 153卷

关键词：

In-situ microscopy; ESEM; Chamber pressure; Atmospheric corrosion; WET-DRY CONDITIONS; AZ31 MG ALLOY; CRYSTALLOGRAPHIC ORIENTATION; CRYSTAL ORIENTATION; AZ91D; ESEM; SEM; MICROSTRUCTURE; INITIATION; OXIDATION;

D O I：

10.1016/j.ultramic.2015.02.010

中图分类号：

TH742 [显微镜];

学科分类号：

080401 [精密仪器及机械];

摘要：

The feasibility of environmental scanning electron microscope (BEM) in studying the atmospheric corrosion behavior of 99.97% Mg was investigated. For reference, ex-situ exposure was performed. A model system was designed by spraying few salt particles on the metal surface and further promoting the corrosion process using platinum (Pt) deposition in the form of 1 x 1 x 1 pm(3) dots around the salt particles to create strong artificial cathodic sites. The results showed that the electron beam play a significant role in the corrosion process of scanned regions. This was attributed to the irradiation damage occurring on the metal surface during the BEM in-situ experiment. After achieving to a reliable process route, in a successful attempt, the morphology and composition of the corrosion products formed in-situ in the ESEM were in agreement with those of the sample exposed ex-situ. (C) 2015 The Authors. Published by Elsevier B.V.

引用

页码：45 / 54

页数：10

共 38 条

[1]

WATER-VAPOR PARTIAL PRESSURES AND WATER ACTIVITIES IN POTASSIUM AND SODIUM-HYDROXIDE SOLUTIONS OVER WIDE CONCENTRATION AND TEMPERATURE RANGES [J].

BALEJ, J .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 1985, 10 (04) :233-243

[2]

In situ ESEM investigations of the oxide growth on hot work tools steel:: effect of the water vapour [J].

Bruckel, R ;

Lours, P ;

Lamesle, P ;

Pieraggi, B .

MATERIALS AT HIGH TEMPERATURES, 2003, 20 (04) :551-560

[3]

MINIMIZING SAMPLE EVAPORATION IN THE ENVIRONMENTAL SCANNING ELECTRON-MICROSCOPE [J].

CAMERON, RE ;

DONALD, AM .

JOURNAL OF MICROSCOPY-OXFORD, 1994, 173 :227-237

[4]

Research of {0001} crystal orientation for magnesium alloys solidified in a fashion of cellular crystals [J].

Chang, Guo-wei ;

Chen, Shu-ying ;

Li, Qing-chun ;

Yue, Xu-dong ;

Qi, Yi-hui .

INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS, 2012, 19 (02) :136-140

[5]

In situ observation of crack initiation and propagation of the charged magnesium alloy under cyclic wet-dry conditions [J].

Chen, Jian ;

Wang, Jianqiu ;

Han, Enhou ;

Ke, Wei .

CORROSION SCIENCE, 2008, 50 (08) :2338-2341

[6]

In situ observation of formation and spreading of micro-droplets on magnesium and its alloy under cyclic wet-dry conditions [J].

Chen, Jian ;

Wang, Jianqiu ;

Han, Enhou ;

Ke, Wei .

CORROSION SCIENCE, 2007, 49 (03) :1625-1634

[7]

In situ observation of pit initiation of passivated AZ91 magnesium alloy [J].

Chen, Jian ;

Wang, Jianqiu ;

Han, En-Hou ;

Ke, Wei .

CORROSION SCIENCE, 2009, 51 (03) :477-484

[8]

In situ studies of the effect of CO2 on the initial NaCl-induced atmospheric corrosion of copper [J].

Chen, ZY ;

Persson, D ;

Nazarov, A ;

Zakipour, S ;

Thierry, D ;

Leygraf, C .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2005, 152 (09) :B342-B351

[9]

Atmospheric corrosion of field-exposed AZ31 magnesium in a tropical marine environment [J].

Cui, Zhongyu ;

Li, Xiaogang ;

Xiao, Kui ;

Dong, Chaofang .

CORROSION SCIENCE, 2013, 76 :243-256

[10]

Beam transfer characteristics of a commercial environmental SEM and a low vacuum SEM [J].

Danilatos, G. ;

Rattenberger, J. ;

Dracopoulos, V. .

JOURNAL OF MICROSCOPY, 2011, 242 (02) :166-180

← 1 2 3 4 →