Fig. 10. Photograph of (a) the composite salt core and (b) hollow-structure zinc alloy castings by this composite salt core: b1-without and b2 with water soluble removing.

Fig. 10. Photograph of (a) the composite salt core and (b) hollow-structure zinc alloy castings by this composite salt core: b1-without and b2 with water soluble removing.

Fig. 10. Photograph of (a) the composite salt core and (b) hollow-structure zinc alloy castings by this composite salt core: b1-without and b2 with water soluble removing.

Fig. 10. Photograph of (a) the composite salt core and (b) hollow-structure zinc alloy castings by this composite salt core: b1-without and b2 with water soluble removing.