Figure 2.

The surface morphology of the samples and the EDS results of the surface corrosion products. Cracks on the JDBM alloy and JDBM coating alloy were deeper than those on the Zn-3Cu alloy and Zn-3Cu coating alloy after 3 months of immersion (A). Corrosion pits on the JDBM alloy were the deepest after removing the surface corrosion products (B). The corrosion products on the JDBM alloy and JDBM coating alloy were mainly made of O, C, Na, Mg, Ca, P, Cl and Si, and the corrosion products on the Zn-3Cu alloy and Zn-3Cu coating alloy were mainly composed of O, C, Cu, Ca, P and Zn (C and D, respectively).