A quasi in situ method using a specially developed holder is presented to follow electrochemically induced microstructural changes on a nanometre scale using analytical transmission electron microscopy (TEM). By following a specific specimen area after repeated exposure to oxygen bubbled through aqueous HCl of pH=3, de-alloying of a grain-boundary precipitate of ∼200nm was observed by monitoring the changes in the EELS copper L2,3-edge and EFTEM elemental maps. These results, supporting the existing models of de-alloying of copper rich precipitates in aluminium alloys, demonstrate the effectiveness of the quasi in situ specimen holder for analytical TEM studies of corrosion. © 2012 Elsevier Ltd.

Sai Rama Krishna Malladi

Department of Materials Science and Metallurgical Engineering

F.D. Tichelaar

Q. Xu

M.Y. Wu

H. Terryn

J.M.C. Mol

F. Hannour

H.W. Zandbergen

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IIT Hyderabad

Corrosion Science

Quasi in situ analytical TEM to investigate electrochemically induced microstructural changes in alloys: AA2024-T3 as an example

Journal	Corrosion Science
ISSN	0010938X