Abstract: Disclosed herein are corrosion resistant articles and methods of making the same. The articles include a cast copper alloy component, and a surface modified layer disposed on a surface of the cast copper alloy component, the surface modified layer comprising an surface modifying material selected from the group consisting of Cu, Ni, Cu—Ni, Cu—Sn, Al, Bi, Ni-coated graphite, Ni-coated Al2O3, Ni-coated SiC, uncoated graphite, uncoated SiC, uncoated Al2O3, and any combinations thereof. The methods disclosed herein include providing a slurry having a surface modifying material and a liquid binder. The method further comprises applying the slurry to an insulating tooling (e.g., a core, a mold, or both) to form a slurry-coated tooling, pouring molten copper alloy over the slurry-coated tooling to form a surface modified layer at the interface of the molten copper alloy and the slurry-coated tooling, and solidifying the molten copper alloy and surface modified layer.

Abstract: Exemplary articles may comprise a surface alloyed layer, a base metal comprising a steel, and a transitional layer between the surfaced alloyed layer and the base metal. The surface alloyed layer may comprise nickel (Ni), chromium (Cr), manganese (Mn), molybdenum (Mo), silicon (Si), or combinations thereof. Exemplary methods of making an article may comprise coating a portion of a sand mold with a metal slurry, pouring a molten steel alloy onto the sand mold, and removing the article from the sand mold.

Abstract: Exemplary articles may comprise a surface alloyed layer, a base metal comprising a steel, and a transitional layer between the surfaced alloyed layer and the base metal. The surface alloyed layer may comprise nickel (Ni), chromium (Cr), manganese (Mn), molybdenum (Mo), silicon (Si), or combinations thereof. Exemplary methods of making an article may comprise coating a portion of a sand mold with a metal slurry, pouring a molten steel alloy onto the sand mold, and removing the article from the sand mold.