Shenzhen Alu Rapid Prototype Precision Co., Ltd.

Die-cast zinc does not rust in the same way iron or steel does, as rust is specific to iron oxide formation. Zinc is highly corrosion-resistant due to its ability to form a protective zinc oxide or carbonate layer when exposed to air or moisture, which prevents further degradation. However, under certain conditions, such as prolonged exposure to harsh environments (e.g., saltwater, acidic or alkaline conditions), zinc can corrode, forming white powdery deposits known as "white rust" or zinc corrosion products. This is not the same as rust but indicates surface deterioration.Proper coatings, such as chromate passivation or paint, can enhance zinc’s resistance to corrosion, especially in die-cast applications like automotive parts or hardware.