Abstract
The isothermal corrosion testing, microscopic examination and the performance of Fe 3Si alloy as materials of construction for bath hardware in continuous hot-dipping lines were studied. The corrosion of Fe 3Si alloy in molten zinc was controlled by attacking the grain boundaries preferentially. Aluminum reacted with iron of Fe 3Si alloy firstly while the samples were immersed in molten zinc, although aluminum contents in the molten zinc were very low. The phase of reaction product was thought to be Fe 2Al 5. The corrosion rate of the Fe 3Si alloy in molten zinc was determined to be approximately 2.9×10 −3 mm/h, therefore the liquid zinc corrosion resistance of Fe 3Si alloy was very weak.
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