This study aims to solve the problem of aluminum suction tube failure caused by the adhesion of aluminum ladle slag (ALS) in the process of aluminum ladle operation.
The wetting process of ALS with different Al2O3 content and iron substrate is studied by sessile drop method. The wetting process, contact angle, element diffusion and wetting kinetic behavior at ALS/ iron interface are characterized.
The melting of ALS is divided into three stages: deformation, melting and spreading. ALS with larger Al2O3 content has higher start melting temperature and melting point temperature, and the contact angle is smaller so the wettability is better. ALS and the iron substrate exhibit reactive wetting. The contact angle of ALS decreases rapidly in response to the reaction. An increase in Al2O3 content enhances the activity of Al2O3, promotes the interface reaction and exacerbates the corrosion behavior.
The ALS with higher Al2O3 content shows stronger wetting and corrosion on the iron substrate.
