Solid State Science and Technology, Vol. 16, No 1 (2008) 175-180

ISSN 0128-7389

Corresponding Author: radiah@nuclearmalaysia.gov.my

175

CORROSION BEHAVIOUR OF Al AND Al ALLOYS CONTAINING Zn, Sn AND Cu IN SEAWATER

Siti Radiah Mohd Kamarudin1, Muhamad Daud1,

Abd. Razak Daud2

1Malaysian Nuclear Agency (Nuclear Malaysia)

Bangi, 43000 Kajang, MALAYSIA

2Faculty of Science and Technology, Universiti Kebangsaan Malaysia

43600 Bangi, Selangor, Malaysia

 

ABSTRACT

The corrosion behaviour of aluminium (Al) alloys in seawater medium was investigated

using potentiodynamic technique, complemented by Scanning Electron Microscopy

(SEM) and EDAX. SEM was carried out to characterize the corroded surface and to

observe the extent of corrosion attack on the Al alloys tested in seawater. EDAX

analysis was used to identify elements present on the specimen surface. The results

indicate that zinc (Zn), stanum (Sn) and copper (Cu) as alloying elements enhance

corrosion behaviour of the aluminium in seawater by shifting the potential to a more

negative value. In the presence of those elements, the Al alloys becomes more active,

having potential of more than 1.0 VSCE and showed active corrosion behaviour.

 

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