<p>A method of repairing a turbine blade fitted to a rotor (desirably a blower for blast furnace) in a corrosive environment capable of extending the service life of the turbine blade, characterized by comprising the steps of applying a hammering treatment by ultrasonic vibration terminal to a surface with corrosive pits before the corrosive pits produced on the surface of the turbine blade are grown to an averaged diameter of 50 mum or larger to reduce the depth of the corrosive pits to 5 mum or shallower.</p>
