Effects of substituting ytterbium for scandium on corrosion behaviour of Al-Sc alloy
authors Tuan, NQ; Alves, AC; Toptan, F; Lopes, AB; Pinto, AMP
nationality International
journal MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
keywords 3.5-PERCENT NACL SOLUTION; ELECTROCHEMICAL-BEHAVIOR; LOCALIZED CORROSION; ALUMINUM-ALLOYS; INTERMETALLIC PARTICLES; MG ALLOYS; MICROSTRUCTURE; ADDITIONS; IRON
abstract The localized corrosion and electrochemical behaviour of Al-0.28 wt.% Sc and Al-0.24 wt.% Sc-0.07 wt.% Yb alloys have been studied in 3.5 wt.% NaCl solution. The results showed that the impurity intermetallic phases containing Fe can act as cathodes and promote localized corrosion in the surrounding matrix. Yb had strong effect on the polarization behaviour in the anodic domain of Al-Sc alloy by improving the pitting corrosion resistance of this alloy. It has been deduced that a high number density of fully coherent nano-sized Al3Sc or Al-3(Sc, Yb) precipitates in heat treated alloys can enhance the passivation tendency of these alloys.
publisher WILEY-V C H VERLAG GMBH
issn 0947-5117
year published 2015
volume 66
issue 12
beginning page 1504
ending page 1511
digital object identifier (doi) 10.1002/maco.201508360
web of science category Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering
subject category Materials Science; Metallurgy & Metallurgical Engineering
unique article identifier WOS:000368419100016
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journal impact factor 1.259
5 year journal impact factor 1.293
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