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EnglishThe electrochemical behaviour of a number of Al–Mg alloys with increasing content of erbium (rare earth metal) has been eval- uated. To this end borate solutions with or without chloride have been used. The examined alloys show a complex microstructure, in which the Al solid solution coexists with such intermetallic compounds as Al3Mg2, Al66.7Mg23.3Er10 (t) and Al3Er. In chloride- free solutions the alloys exhibit a good electrochemical behaviour independent of composition and microstructure. In chloride- containing solutions the intermetallic compounds have a strong influence due to the difference in electrochemical activity between these phases and the Al matrix; local galvanic cells form affecting the stability of the protective superficial oxide and lead to an accelerated localised corrosion attack. The presence of erbium is beneficial; the analysis of the anodic polarisation curves reveals a progressive increase in the passive range with increasing rare earth concentration.
Influence of the rare earth content on the electrochemical behaviour of Al–Mg–Er alloys / ROSALBINO F.; ANGELINI E; DE NEGRI S; SACCONE A; DELFINO S. - In: INTERMETALLICS. - ISSN 0966-9795. - ELETTRONICO. - 11(2003), pp. 435-441. [10.1016/S0966-9795(03)00016-5]
| Titolo: | Influence of the rare earth content on the electrochemical behaviour of Al–Mg–Er alloys | |
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| Data di pubblicazione: | 2003 | |
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| Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/S0966-9795(03)00016-5 | |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| 1-s2.0-S0966979503000165-main.pdf | 1. Preprint / Submitted Version | Non Pubblico - Accesso privato/ristretto | Administrator Richiedi una copia |
http://hdl.handle.net/11583/1896832
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