The intergranular corrosion of the zinc strip becomes very sensitive

Intergranular corrosion of zinc alloy with become very sensitive, in warm, wet conditions accelerated the intergranular corrosion of itself, zinc alloy belt to reduce the mechanical properties, workpiece just die casting molding, surface quality of everything is normal, zinc alloy with each furnace zinc liquid temperature change will cause the supersaturated iron, zinc alloy belt must be based on special high purity zinc, back to the furnace charge not more than 50%, General new material, and cause casting size changes.

Zinc alloy belt when impurity elements in the alloy composition of lead, cadmium, tin, exceed standard, zinc alloy belt and focused on the grain boundary as cathode, zinc alloy solid solution with rich aluminum as anode, cause a deformation of the casting and aging, characterized by swelling volume, zinc alloy with solubility with temperature and the lower, the solubility of solid solution is greatly saturated, Mechanical properties, especially plasticity, decrease significantly, and even rupture after a long time.

Zinc alloy belt has good mechanical properties at room temperature, tensile strength at high temperature and low temperature impact performance dramatically drop, zinc alloy belt only has the general characteristics of the die-casting zinc alloy, mechanical properties, tensile strength, is the largest when the material fracture resistance, zinc alloy and high strength, good casting performance, cooling speed had no obvious effect on mechanical properties, overheating and insensitive to remelting, Small shrinkage rate, less porosity, can be electroplated, can be finished by conventional methods.