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Effect of ultrasound treatment of AlSi5 liquid alloy on corrosion resistance
Author(s) -
Arrighini A.,
Gelfi M.,
Pola A.,
Roberti R.
Publication year - 2010
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.200905303
Subject(s) - materials science , eutectic system , corrosion , microstructure , alloy , ultrasound , metallurgy , inert gas , immersion (mathematics) , composite material , medicine , radiology , mathematics , pure mathematics
The application of power ultrasound to liquid alloys can be a simple and cost effective method to induce both degassing and grain refinement in a single step, without the need of inert gas or inoculants additions. In this paper, the treatment of liquid hypoeutectic AlSi5 alloy by ultrasound waves and its effects on microstructure were investigated. The corrosion behavior of ultrasound treated samples was compared to that of the non‐treated ones by means of immersion and electrochemical tests. It was observed that the ultrasound treated alloy offers better quality, higher mechanical properties and improved corrosion resistance, as a consequence of a more uniform distribution of the solute.