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Hot dip galvanized profile packaging steel strip oxidation reduction method

by:Hongmei     2020-04-11
Packaging steel strip oxidation reduction method galvanized introduction to this method is to cancel the qi washing, pickling and solvent process of hot dip galvanized surface pretreatment method such as law. Its technological process first make steel through oxidizing atmosphere of preheating furnace ( Furnace heating temperature is 440 - 460℃) , and then send the artifacts to restore a scale and in reducing atmosphere furnace heated to a temperature. Pick up will be steel sink about 440 - 460 ℃ temperature of liquid zinc galvanizing, this method is more advanced methods of hot galvanizing. The speed of the steel in liquid zinc extraction has a great influence on the pure zinc layer thickness, low extraction rate, thin layer; The extraction rate is high, the layer thickness. Take speed should be appropriate, therefore, high speed, out of the liquid zinc to drop, can make the coating uneven; Speed is too low. Makes the pure zinc layer is too thin disappear, even lower plasticity.
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