Abstract
Corrosion resistance of iron aluminides was investigated in molten soda-lime glass and molten lead glass. Iron aluminides with different additives and comparative steel (EN X8CrNi 25-21) were tested in laboratory conditions and compared. The corrosion resistance was determined using measurement of weight change and change of surface. The tinting of molten glasses is important to describe the interaction between the molten glass and the investigated materials. The alloys Fe25Al5Cr and Fe28Al3Cr0.02Ce have very good corrosion resistance against both glasses. The preferential oxidation of aluminium is typical for all tested iron aluminides and generated alumina slows down corrosion of these alloys. The plunger for molten glass output control was produced from Fe25Al2Cr and the application plant test of plunger has been running in lead molten glass. Damage of the surface is typical for doped Zr iron aluminide.

Key words
iron aluminide (Fe₃Al type), corrosion resistance, molten soda-lime glass, molten lead glass

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