Abstract：Through the methods such as SEM, Raman spectroscopy and electrochemical pickling simulation, the oxide scale structure and pickling mechanism of Fe- Si alloy had been explored. The results showed that an innermost layer of Fe2SiO4 formed at the scale- alloy interface can improve the oxidation resistance of Fe- Si alloy and made the oxide thickness less than DC- 03. The oxide of Fe- Si alloy existed throughout the original cracks on the scale- alloy interface, and the HCl solution was penetrated to the scale- alloy interface through the original cracks, which caused that the Fe- Si alloy pickling process skipped the incubation period and went directly to the acceleration period and stable period, resulting in the pickling time of Fe- Si alloy shorter than that of DC- 03. Ultrasonic assisted and pickling temperature increasing improved the surface quality of Fe- Si alloy after pickling and reduced the "red scale" residue.
2018, Vol. 28 
