Anodic dissolution of Al sacrificial anodes in NaCl solution containing Ce

► Ce improves the current efficiency of Al sacrificial anodes. ► Ce enhances a uniform attack on the surface of the Al alloy. ► The dissolution of the Al anode in chloride media initiates at precipitations where Ce is enriched. ► Ce enhances the activation on the surface of Al sacrificial anodes. Th...

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Bibliographic Details
Published in:Corrosion science 2011-04, Vol.53 (4), p.1298-1303
Main Authors: Xiong, W., Qi, G.T., Guo, X.P., Lu, Z.L.
Format: Article
Language:English
Subjects:
A. Alloy
A. Aluminium
A. Rare earth elements
Activation
Alloying additive
Alloying elements
Aluminum
Aluminum base alloys
Anodic dissolution
Applied sciences
B. SEM
C. Cathodic protection
Corrosion
Corrosion environments
Corrosion prevention
Exact sciences and technology
Metals. Metallurgy
Sacrificial anodes
Surface chemistry
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Summary:► Ce improves the current efficiency of Al sacrificial anodes. ► Ce enhances a uniform attack on the surface of the Al alloy. ► The dissolution of the Al anode in chloride media initiates at precipitations where Ce is enriched. ► Ce enhances the activation on the surface of Al sacrificial anodes. The corrosion behaviour of Al–Zn–In sacrificial anodes has been investigated in a sodium chloride solution containing CeCl 3. Scanning electron microscopy, energy-dispersive X-ray analysis, and inductively coupled plasma mass spectrometry have been employed to gain knowledge of the micro-morphology and corrosion process of the Al alloy. Cerium, both as the alloy element and as the additive in the NaCl solution, improves the electrochemical properties of the Al–Zn–In alloy. The activation of Ce in the Al–Zn–In alloy in the NaCl solution has been studied.
ISSN:0010-938X
1879-0496
DOI:10.1016/j.corsci.2011.01.001