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Evaluating the intergranular corrosion susceptibility of Al‐Mg‐Si‐Cu alloys using electrochemical methods
Author(s) -
Schnatterer C.,
Bulinger A.,
Zander D.
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.201608979
Subject(s) - intergranular corrosion , materials science , alloy , metallurgy , corrosion , electrochemistry , pitting corrosion , aluminium , electrode , chemistry
The susceptibility of the 6056 aluminum alloy in the solution annealed (T4) and artificially aged (T6) condition to intergranular corrosion (IGC) was investigated utilizing the established testing standard ISO 11846 B and an electrochemical procedure specified as ISO 11846C. The first method showed significant differences in the corrosion properties of the materials, namely a high pitting susceptibility of the T4 treated material and an exclusive intergranular attack in the artificially aged samples. The electrochemical technique was not suitable to confirm these distinct corrosion properties. However, an alloy specific adaption of the standard was conducted to give comparable results and to qualify the method for high Cu containing 6000 alloys.