Aluminum is more expensive than zinc for two main reasons. First of all, aluminum is widely used in high-end fields such as aviation and automobiles, and the requirements for materials in these fields are very strict. Aluminum is an ideal choice for lightweight design because of its low density and good strength. Due to its wide application in high-end fields, the demand for aluminum is relatively large and the supply is relatively tight, thus pushing up its price. The application field of aluminum is relatively narrow. Although aluminum is widely used in aviation, automobile and other fields, its application range is relatively narrow compared with zinc. Zinc is mainly used in anti-corrosion coatings and other fields, and the demand and supply in these fields are relatively large, thus reducing the price of zinc.