Poor Corrosion Resistance Of China Zinc Die Casting Manufacture

  • Both China zinc die casting and China lead die casting are parts of pressure casting. They use a pressure casting machine die casting machine equipped with a casting mold to pour liquid zinc or zinc alloy into the inlet of the die casting machine and pass the die casting machine. Die casting is to cast parts or alloy parts of the shape and size restricted by the mold. Such parts are usually called alloy die castings. Then let's take a look at a point that needs to be paid attention to during the use of zinc die castings, which is poor in corrosion resistance.

    When the impurity elements of lead, cadmium, and tin in the alloy composition exceed the standard, the castings will be aging and deformed, which is manifested as volume expansion, mechanical properties, especially plasticity, significantly decreasing, and even cracking after a long time. Lead, tin, and cadmium have very little solubility in zinc alloys, so they concentrate on the grain boundary and become the cathode. The aluminum-rich solid solution becomes the anode, and in the presence of water vapor (electrolyte), it promotes intergranular electrochemical corrosion. Die castings are aged due to intergranular corrosion.

    The development of China zinc die casting manufacturer in the country is also growing. The development of die castings is getting better and better with the passage of time. Although there are still many problems, and the technology is not too mature, the overall situation is It is on the rise.