Effect of copper alloying addition on the electrochemical corrosion behaviour of Fe 3 Al intermetallic in sulphuric acid solution | Zendy

Rosalbino F. | Zendy; Carlini R. | Zendy; Zanicchi G. | Zendy; Scavino G. | Zendy

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Effect of copper alloying addition on the electrochemical corrosion behaviour of Fe 3 Al intermetallic in sulphuric acid solution

Author(s) -

Rosalbino F.,

Carlini R.,

Zanicchi G.,

Scavino G.

Publication year - 2016

Publication title -

materials and corrosion

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.487

H-Index - 55

eISSN - 1521-4176

pISSN - 0947-5117

DOI - 10.1002/maco.201608854

Subject(s) - intermetallic , materials science , corrosion , metallurgy , aluminide , dielectric spectroscopy , copper , electrochemistry , layer (electronics) , alloy , composite material , chemistry , electrode

The effect of Cu alloying addition on the corrosion resistance of iron aluminide Fe 3 Al has been investigated. In this work, the corrosion behaviour of Fe 3 Al‐5Cu (at%) alloys has been assessed by open circuit potential, potentiodynamic polarisation and electrochemical impedance spectroscopy (EIS) measurements carried out in a 0.5 M H 2 SO 4 solution, without stirring and in contact with the air. For comparison, the electrochemical tests have also been performed on Fe 3 Al intermetallic. The obtained electrochemical results indicate that iron aluminide Fe 3 Al‐5Cu exhibits superior corrosion resistance as compared to Fe 3 Al. This improvement may be ascribed to the formation of a copper‐enriched surface layer which shows higher protective effectiveness than that formed on Fe 3 Al intermetallic.

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