For the application needs of Al-Zn alloy coatings in corrosion prevention, 15 Al-Zn alloys with various Zn contents (pure Al, Al-5Zn, Al-l0Zn, Al-12.lZn, Al-l6Zn, Al-22Zn, Al-28.4Zn, Al-38Zn, Al-42Zn, Al-46Zn, Al-52Zn, Al-54Zn, Al-56Zn, Al-98.5Zn and pure Zn) were used in the study. The electrochemical techniques were used to evaluate the corrosion behavior of Al-Zn alloys in 3% NaC1 solution, including corrosion potential, pitting corrosion potential, corrosion current, and crevice corrosion resistance. The results of experiments showed that the Al-Zn alloys which contain Zn between 5 and 10 at.% have better corrosion resistance and cathodic protection.