Yes, zinc alloy can tarnish over time. Tarnishing occurs due to exposure to air, moisture, and chemicals, leading to a dull or discolored appearance. To prevent tarnishing, keep zinc alloy items dry and clean. Store them in airtight containers or use anti-tarnish strips. Regular cleaning with a soft cloth and mild soap helps maintain their shine. Avoid exposure to harsh chemicals, such as perfumes and household cleaners. If tarnishing occurs, a mixture of baking soda and water or commercial metal polish can restore the original luster. Proper care can significantly extend the life and appearance of zinc alloy items.