Galvanizing process is the key process in galvanizingDegree control, zinc immersion time control, the use of galvanized lifting equipment is the main galvanized requirementsThe digging part.
(1) design and use of zinc pot
The size of the zinc pot is designed to meet the needs of the largest galvanized workpiece.The production of galvanizing and the heating method of zinc pot must be fully considered. If the zinc pot is designedToo small capacity, when galvanizing heat supply, zinc solution temperature fluctuations, galvanized workpiece qualityThe quantity is difficult to control, the zinc temperature fluctuates greatly the corrosion of iron zinc pot increases, the zinc residue produced is much, and straightIt is related to the life and safety of the zinc pot. If the zinc pot capacity is too large, power consumption, zinc ashBig. The design generally requires an hourly yield and zinc capacity of 1: (24-40) to meet the requirementsIn the case of the solution, the area of the liquid zinc contact with air should be reduced as much as possible in the designThe oxidation of less zinc liquid and the production of zinc ash. I plant the original use of zinc pot length x width x depth11.2 m * 1.2 m *1.5m. Due to the production needs, the zinc pot currently used is 12m x 1.5m x 1.8m. zincThe selection of pot material is directly related to the life of zinc pot. 08F steel is the first choice of low carbon steel material.Now the special new type of zinc pot WKS, zinc pot life can be extended. In the earlyApply a special anticorrosive coating on the inner surface of the zinc pot to protect the inner surface of the zinc pot.The temperature must be slow when the first use, and the thermal stress of welding zinc pot should be eliminatedAvoid to produce collapseCrack. At the same time, it is necessary to add zinc nickel alloy or dilute liquid zinc as requiredSoil polyalloy.Nickel content in zinc liquid with 0.06% 0.07% advisable, when the aluminum content is NEWIDHOe seeding and record the small window between 0.08% and 0.12%, the galvanized layer with steel surface to form five aluminum HuaEr iron (FeA1) middle layer, the layer reaches a certain thickness, it not only can improve the adhesion of coating performance, and can reduce the generation of zinc slag (FeZn), usually add pure aluminium, cable aluminum wire, nickel powder, rare earth powder when you can't, add directly to molten zinc liquid, increase liquidity zinc liquid, reduce zinc liquid surface scum and salvage zinc ash, zinc slag on a regular basis.