Takuro Saga and Masato Yasui
The effect in the hot-dipped aluminizing process of the alloying elements found in steel on the mechanism of interfacial alloy layer formation was investigated. The results obtained were as follows: (1) Silicon, chromium or manganese in steel act as inhibitor in the same way as when these elements are added to the aluminium bath. (2) A more effective inhibitive action is obtained by addition of silicon to the aluminium bath than by its addition to the base metal. (3) The softening effect of silicon in steel on the hard alloy layer is more efficient with the increase of silicon content. (4) The mean chemical composition of the alloy layer produced with pure iron and pure aluminium is somewhat higher in Fe-content than FeAl3. The rate of silicon content in the alloy layer was found to be correlated with the silicon content in the steel.
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