Case corrosion-resistant liners in nozzles and case bodies to eliminate overlays

A method for protecting a turbomachine from corrosion, comprising:

• creating a first sand mold in a drag of a casting flask, the first sand mold defining a first in-gate and a hollow region;
• pouring a molten first material in the first sand mold to cast a first component of the turbomachine;
• creating a second sand mold in the drag of the casting flask, the second sand mold utilizing the first component;
• and
• pouring a molten second material in the second sand mold to cast a second component of the turbomachine integral with the first component, one of the first component and the second component being corrosion-resistant.

A method for protecting a turbomachine from corrosion, comprising:

• creating a first sand mold in a drag of a casting flask;
• coupling a cope of the casting flask to the drag, the cope including a runner pin and at least one riser pin;
• removing the runner pin and the at least one riser pin to expose a runner and at least one riser, respectively;
• pouring a molten first material in the runner to cast a first component of the turbomachine;
• removing the first sand mold and creating a second sand mold in the drag, the second sand mold utilizing the first component;
• coupling the cope of the casting flask to the drag, the cope including the runner pin and the at least one riser pin;
• removing the runner pin and the at least one riser pin to expose a runner and at least one riser, respectively;
• and
• pouring a molten second material in the runner to cast a second component of the turbomachine integral with the first component, one of the first component and the second component being corrosion-resistant.