Investigation of Interfacial Phase Formation During Corrosion of  Stainless Steel

Malczyk, Piotr; Weigelt, Christian; Zienert, Tilo; Brachhold, Nora; Sauke, Sven-Olaf; Semrau, Hubertus; Aneziris, Christos G.

doi:10.1007/s42411-019-0070-3

Cited by 2 publications

(5 citation statements)

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“…Precipitations marked with scan I were detected as τ 5 -Al(Fe,Cr)Si containing noticeable amounts of Cr [ 4 , 44 ]. A group of flake-like precipitations from scan II was identified as τ 6 -AlFeSi [ 3 , 4 , 45 ]. Scans V and VI represent a steel matrix–aluminum alloy interface, where the continuous dissolution of the substrate material was revealed.…”

Section: Resultsmentioning

confidence: 99%

“…The chemical reactivity of molten aluminum alloys in contact with steel-based materials is well known and has already been widely studied [ 1 , 2 , 3 , 4 ]. A short contact time of steel with liquid aluminum is utilized for the formation of very robust, protective Fe-Al intermetallic layers on steel parts [ 5 , 6 , 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

“…A short contact time of steel with liquid aluminum is utilized for the formation of very robust, protective Fe-Al intermetallic layers on steel parts [ 5 , 6 , 7 , 8 ]. However, longer contact times of steel-based materials with liquid aluminum cause rapid dissolution of the steel and damage to the parts [ 2 , 4 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

“…Liquid aluminum alloy dissolves iron and forms complex phases in the ternary Al-Si-Fe system [ 3 , 24 , 25 ]. The dissolution of steel is continuously progressing as a function of time and does not omit other steel elements such as chromium or nickel [ 4 , 26 , 27 , 28 , 29 ]. Aluminum alloys also reduce most oxides [ 4 , 30 , 31 ].…”

Section: Introductionmentioning

confidence: 99%

“…The dissolution of steel is continuously progressing as a function of time and does not omit other steel elements such as chromium or nickel [ 4 , 26 , 27 , 28 , 29 ]. Aluminum alloys also reduce most oxides [ 4 , 30 , 31 ]. Therefore, coatings applied on steel are sufficient only for a short period of contact with the melt [ 1 , 13 , 31 , 32 ].…”

Section: Introductionmentioning

confidence: 99%

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Corrosion-Resistant Steel–MgO Composites as Refractory Materials for Molten Aluminum Alloys

et al. 2020

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In this study, a novel metal matrix composite based on 60 vol% 316L stainless steel and 40 vol% MgO manufactured by powder metallurgy technology was developed. The corrosion resistance of the developed steel–MgO composite material against molten aluminum alloy AlSi7Mg0.3 was investigated by means of wettability tests and long-term crucible corrosion tests. The wettability tests were carried out using the sessile drop method with the capillary purification technique in a hot-stage microscope (HSM). Static corrosion tests were performed in molten aluminum alloy at 850 °C for 168 h to evaluate the impact of pre-oxidation of the composite surface on the corrosion resistance. The pre-oxidation of steel–MgO composites was carried out at 850 and 1000 °C for 24 h, based on preliminary investigations using thermogravimetry (TG) and dilatometry. The influence of the pre-oxidation on the composite structure, the corrosion resistance, and the phase formation at the interface between the steel–MgO composite and aluminum alloy was analyzed using SEM/EDS and XRD. The impact of the steel–MgO composite material on the composition of the aluminum alloy regarding the type, size, and quantity of the formed precipitations was investigated with the aid of ASPEX PSEM/AFA and SEM/EBSD. It was revealed that the pre-oxidation of the steel–MgO composite at 1000 °C induced the formation of stable MgO-FeO solid solutions on its surface, leading to a significant increase of long-term corrosion resistance against the liquid aluminum alloy.

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