This study describes the resistance to oxidation of a hot-dip aluminium coated (aluminized) cast iron layer on an as-cast iron surface and the changes in the properties of the Fe-Al alloy layer by heating test.
The weight increase of aluminized specimens during heating tests conducted in an oxidation atmosphere was lower than that of non-aluminized cast iron, indicating that resistance to oxidation of cast iron was improved by aluminization treatment.
The thickness of the Fe-Al intermetallic layer consisting of mainly Fe
2Al
5 formed by aluminization treatment increased when high temperature was maintained by diffusion between the aluminum surface and cast iron. The composition of the grown alloy layer after maintaining the temperature at 1073K was mainly Fe
2Al
5. Complex phases consisting of Fe
2Al
5, FeAl, Fe
3Al, and Fe
3AlC
0.5 were formed in alloy layers after maintaining the temperature at 1273K.
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