Localized Corrosion of Secondary AlSi10MnMg-T7 Near Net-Shaped Castings Produced by Vacuum-Assisted HPDC

The localized corrosion susceptibility of secondary AlSi10MnMg-T7 alloys, produced using vacuum assisted high pressure die casting with different end-of-life material contents, in NaCl (aq) was determined relative to the primary alloy. Microstructure features such as grain size, Si eutectic phase and intermetallic particles distribution differed from the primary alloy, which adversely affected the localized corrosion susceptibility. Increased susceptibility is linked more so to initiation events, rather the propagation. problematic microstructure features are discussed within this context.