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Correlation Between Unsteady-State Solidification and Electrochemical Corrosion Parameters of an AlSiMg Alloy by Carolina R. Barbosa; Teyla C. Silva; Hugo M. Azevedo; José C. Filho; Antonio L. Moreira; Otávio L. Rocha is a Engineering article available to read on EtoBox.
What is Correlation Between Unsteady-State Solidification and Electrochemical Corrosion Parameters of an AlSiMg Alloy about?
Electrochemical corrosion tests were performed on samples of horizontally solidified Al7Si0.3Mg (wt%) alloy. The investigated solidification and corrosion parameters were growth and cooling rates (V L and T R , respectively), secondary dendritic spacing (k 2 ), corrosion potential, and corrosion current (E CORR and i CORR , respectively). Optical and scanning electron microscopy analysis were carried out on the samples, and typical solidification microstructure was characterized by primary and eutectic phases (Al a and Al a-eutectic ? Si? p-Al 8 Mg 3 FeSi 6 ?h-Mg 2 Si, respectively). The results depicted a higher corrosion resistance in as-cast samples with finer dendritic microstructure, that is, for higher and lower V L /T R and k 2 values, respectively. A mathematical expression characterized the i CORR variation with V L , T R , and k 2 . SEM/EDS element maps and point microanalysis showed a strong decreased of Mg and Fe elements within the interdendritic regions due to the corrosion of p and h intermetallic phases. It was allowed to conclude that Si particles exhibit cathodic behavior in relation to the matrix as well as p and h intermetallic compounds. A comparative analysis
Who reads Correlation Between Unsteady-State Solidification and Electrochemical Corrosion Parameters of an AlSiMg Alloy?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- Carolina R. Barbosa; Teyla C. Silva; Hugo M. Azevedo; José C. Filho; Antonio L. Moreira; Otávio L. Rocha
- Publisher
- Springer Science and Business Media LLC
- Published
- 2021
- Language
- EN
- Field
- Engineering (Physical Sciences)