What about using molten lead or something that can act like a lubricant/insulation at that temperature away from the corrosion in the same way airflow is used o

What about using molten lead or something that can act like a lubricant/insulation at that temperature away from the corrosion in the same way airflow is used over jet turbine blades to stop them melting? It there any high temperature liquid that is molten salt phobic like oil and water?