Published 02/04/2022 at 939 × 254 in Comparative study on performance and microstructure of compositewater-soluble salt core material for manufacturing hollow zincalloy castings tes. Fig. 4. The surface macroscopic morphology of the different salt core materials: (a) KN, (b) KNC and (c) KN tes. Fig. 4. The surface macroscopic morphology of the different salt core materials: (a) KN, (b) KNC and (c) KN