Surface modification of steel and cast iron to improve corrosion resistance in molten aluminium

TL;DR: In this article, the synergistic effect of corrosion and wear on the performance of various materials, including Fe-based alloys, ceramics, and corresponding high apparatus of corrosion-wear in molten aluminum and its alloys was discussed, and the effects of dynamic agitation due to rotating of friction pairs, physical property of liquid metal and size of grain etc.

TL;DR: In this paper, the authors provide an overview of the corrosion behavior of mild steels in the static liquid aluminum with an emphasis on the thermodynamic and kinetic aspects, based on which four corrosion control approaches including alloying, introducing secondary phase, matrix microstructure control and surface treatment are introduced.

TL;DR: In this article, the corrosion resistance and interfacial morphologies of Fe-Cr-Mo-B cast steels in molten aluminum have been studied and it was shown that borides play a key role in improving the corrosion resilience of Fe 2 B.

Abstract: The morphology and constitution of the intermetallic layers formed on the surface of duplex stainless steels (DSSs) immersed in molten aluminum at 750 °C for 30 min have been studied in detail by scanning electron microscopy and electron probe micro‐analyzer. Compared with H13 steel, the DSSs exhibited a better corrosion resistance. The weight loss rates, as expressed in terms of weight loss per square centimeter of the specimen per minute, of DSSs are smaller than that of H13. The thickness of the intermetallic layers of DSSs is comparatively thinner. And the interface between the intermetallic layers and DSSs substrate is much flatter. The intermetallic layers of duplex stainless steels are consisted of inner continuous (Fe,Cr)2Al5 phase and outer porous (Fe,Cr)Al3 phases. Microstructure observations suggest that the retarded interfacial reaction between DSSs and molten aluminum is associated with a continuous Al‐Fe‐Cr intermetallic phases layer formed on the solid/liquid interface, which acts as an effective diffusion barrier. The precipitation phase particles distributed along the austenite/ferrite and ferrite/ferrite interfaces also had a good effect on the corrosion resistance properties of DSSs to molten aluminum. Copyright © 2015 John Wiley & Sons, Ltd.

TL;DR: In this article, the process of hot dipping pure aluminum on a steel substrate followed by oxidation was studied to form a surface layer of aluminum oxide resistant to the corrosion of aluminum melt.

TL;DR: In this paper, the authors present the results of a systematic study involving three H series and two maraging hot work tool steels with and without PVD coatings, in terms of heat checking resistance, hardness and impact toughness changes, as well as molten aluminum corrosion resistance.

TL;DR: In this article, the conditions for codepositing Al and Si from the vapour phase to form silicide and aluminide diffusion coatings on γ-TiAl with a coherent structure was discussed.

TL;DR: In this paper, a simple aluminide coating applied to the Cr-added TiAl alloys showed improvement of ductility and oxidation resistance, mainly due to grain refinement of the added coating layer.