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Corrosion behavior of primary and secondary AlSi high pressure die casting alloys
Author(s) -
Cecchel S.,
Cornacchia G.,
Gelfi M.
Publication year - 2017
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.201709526
Subject(s) - alloy , corrosion , materials science , metallurgy , borax , die casting , casting , die (integrated circuit) , raw material , chemistry , organic chemistry , nanotechnology
This work characterized and compared the corrosion resistance of a traditional secondary HPDC AlSiCu alloy with two innovative AlSi low‐Cu and low‐Fe ones. Samples were collected from both the bulk and the skin of castings to evaluate the differences. Potentiodynamic tests were performed in 3.5% NaCl and 0.05 M Borax + 0.01 M NaCl water solutions and microstructural analyses have been carried out. The results demonstrated the higher corrosion resistance of the two innovative alloys tested. Skin surface showed a worse resistance compared to bulk, especially for the traditional AlSiCu alloy.