Dongguan Da Ling Shan Chang Sheng processing hardware store zinc and aluminum die casting is ── kinds of zinc die casting parts as the main component. This part surface ── very dense surface layer, which is the evacuation of the porous structure, but also a lively amphoteric metal. Therefore, only the use of appropriate pre-treatment methods and plating process, in order to ensure on zinc alloy plating layer with good adhesion, meet the requirements of qualified products. Plating zinc alloy commonly used for ZA4-1, the main component: aluminum 3.5% to 4.5% copper 0.75% to 1.25% Mg 0.03% to 0.08% and the balance zinc, and zinc alloys, the sum of impurities ≤0.2%. The amount of copper-zinc alloy 925 high grades, but also easy to plating. Usually zinc alloy plate, density zinc alloy is 6.4 ~ 6.5 g / cm, if the density of <6.4 g / cm HDMI zinc alloy metal shell jewelry, prone after plating blistering and pitting. In short zinc alloy luggage accessories, when the selection must strictly. In addition, die-casting mold must be designed to avoid to bring insurmountable plating defects (such as pitting). Dongguan Da Ling Shan Chang Sheng processing hardware store copper effect: 1. increase the hardness and strength of the alloy; 2 to improve wear resistance of the alloy; 3 to reduce intergranular corrosion. . Hardware copper sleeve unfavorable: a copper content of more than 1.25%, the make casting dimensions and mechanical strength due to aging and changes; 2 lower alloy extensibility. Role: ① increased copper content of the alloy strength of zinc alloy luggage accessories, zinc alloy, Chang Sheng Hardware provided by Dongguan Da Ling Shan Chang Sheng processing hardware store. Dongguan Da Ling Shan Chang Sheng processing hardware store (shop1379091614724.1688.com) strong, credible, in Dongguan, Guangdong and other hardware accessories industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Chang Sheng Hardware and you hand into the brilliant, for a better future!