Characterization of aluminide coatings formed on 1.4914 and 316L steels by hot-dipping in molten aluminium
- CEA-CEREM/DECM/SCECF, Fontenay-aux-Roses (France)
Protective coatings are commonly used to extend the life of alloys in oxidation, corrosion or erosion environments encountered in various industrial fields. For example, in the fusion nuclear technology area, coatings applied to the surface of structural materials have to be developed because of the use of the liquid alloy Pb-17Li as a tritium breeder material and a coolant in future reactors. In this specific case, it is necessary to protect the steel containment from liquid metal corrosion and to prevent the loss of tritium from the coolant by diffusion/permeation through steel or elevated temperatures. Greater success has been reported for intermetallic coatings as aluminides which form protective aluminium oxide scales on steel surface. Therefore, the purpose of this work is to study aluminide coatings produced on steel substrate by hot-dipping in molten aluminium. In the present paper, 1.4914 martensitic steel and 316L austenitic stainless steel (materials suggested as structural steels for the future blanket of fusion reactors) have been studied. Some tests have also been carried out with pure metals as iron, nickel and chromium. The chemical composition, structure and growth properties of intermetallic layers formed during the interaction of materials with liquid aluminium are presented and compared.
- OSTI ID:
- 438625
- Journal Information:
- Scripta Materialia, Vol. 36, Issue 4; Other Information: PBD: 15 Feb 1997
- Country of Publication:
- United States
- Language:
- English
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