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Investigation of Interfacial Phase Formation During Corrosion of Stainless Steel

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Abstract: The paper shows an adaptation of thermoanalytical techniques such as Differential Scanning Calorimetry (DSC) for the investigation of interfacial phase formation during corrosion of stainless steel 316L (FeCr18Ni10Mo3)- and 16-7-3 (FeCr16Mn7Ni3)-based composites with TiO2 and ZrO2 in molten aluminium alloy (AlSi7Mg0.3). The DSC was able to detect the formation of corrosion phases on cooling after two hours of retention at 850 °C. The method allows the recognition of the solidification temperature of new corrosion phases (binary η-AlFe and ternary τ3, τ5, τ5, τ11-AlFeSi) as well as the assessment of the conversion rate of both materials. Scanning Electron Microscopy (SEM) was used for the analysis of the corrosion products.

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We are grateful to Dr. Gert Schmidt for his help with the SEM investigations.

The authors gratefully acknowledge the financial support of the German Research Foundation (DFG) for funding the research project 319086149 under the Collaborative Research Centre 799: TRIP-Matrix Composites.

Data availability statement: The raw/processed data required to reproduce these findings cannot be shared at this time as the data also forms part of an ongoing study.

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Correspondence to P. Malczyk.

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Malczyk, P., Weigelt, C., Zienert, T. et al. Investigation of Interfacial Phase Formation During Corrosion of Stainless Steel. Interceram. - Int. Ceram. Rev. 69, 42–51 (2020). https://doi.org/10.1007/s42411-019-0070-3

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