Effect of Ti and Zr elements with equal mass ratio on microstructure and corrosion resistance of Zn-11Al-3Mg alloy

In this study, the effect of Ti and Zr elements with equal mass ratio on microstructure and corrosion resistance of Zn-11Al-3Mg alloy was investigated. The microstructure was significantly refined and Al-rich phase transformed from dendrite to petal-like with the addition of Zr and Ti elements, due to the Al-3(TixZr1 - x) phase as the nucleation substrate. The corrosion resistance of Zn-11Al-3Mg-x(Ti,Zr) alloy was effectively improved. Moreover, the corrosion products of Zn-Al-Mg alloy were not changed by the addition of Ti and Zr, which are mainly composed of Zn-5(OH)(8)Cl-2 center dot H2O and Zn6Al2(OH)(16)CO3 center dot 4H(2)O.

Automated summary

The addition of Ti and Zr elements in equal mass ratio can refine the microstructure of Zn-11Al-3Mg alloy and improve its corrosion resistance. The corrosion products of the alloy remain unchanged after the addition of Ti and Zr, mainly composed of specific compounds.