Corrosion protection using metallic coating

A method, comprising:

• receiving a workpiece of a second material;
• contacting the workpiece with a sacrificial deposition rod, the sacrificial deposition rod comprising a first material fabricated using a shear assisted processing and extrusion process, wherein the first material includes an icosahedral phase (I-phase) aluminum alloy;
• performing a first deposition process to form a first layer of a coating of the first material on the workpiece, the first deposition process including rotating the sacrificial deposition rod at a first rotation per minute to form the first layer to have a first grain type;
• performing a second deposition process to form a second layer of the coating of the first material over the first layer, the second deposition process including rotating the sacrificial deposition rod a second rotation per minute to form the second layer to have a second grain type, wherein the first layer and the second layer have a first thickness;
• and
• machining the coating to a second thickness that is less than the first thickness, wherein the machining comprises at least one of grinding or sanding;
• wherein the shear assisted processing and extrusion process includes:
• moving a powder comprising an icosahedral phase (I-phase) aluminum alloy into a billet container that is disposed around a mandrel;
• heating the powder in the billet container with a heating element;
• moving the powder from the billet container through spiral grooves in an extruding tube to form a billet;
• and
• extruding the billet through the extruding tube with the mandrel to form the sacrificial deposition rod.