Fig. 6: SEM images and elemental distribution of alloys A, B, and C underr salt spray testing. | npj Materials Degradation

Fig. 6: SEM images and elemental distribution of alloys A, B, and C underr salt spray testing.

From: Effect of iron and manganese on the corrosion resistance of contaminated secondary Al-Si-Mg cast alloys

Fig. 6: SEM images and elemental distribution of alloys A, B, and C underr salt spray testing.

a–c Cross-sectional SEM images showing shallow localized penetration, with preferential attack along eutectic Al-Si regions adjacent to the α-Al matrix. d–i Surface morphologies and corresponding EDS spectra. Trenching (yellow arrows) and formation of corrosion products (yellow circles) are observed around β-AlFeSi particles. j–l High-magnification images showing partial dissolution at the periphery of α-Al(FeMn)Si particles, while many intermetallics remain partly intact (red arrows).

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