In the present years, with the popularization of continuous casting technology in the iron and steel enterprises, the proportion of the silicon-killed steel to total steel products is growing. Because the silicon element in steel product can speed up the reaction between zinc and iron, as a result coating color is changed and color difference is serious. The difficult problem in the technology is a real headache for quite a few hot galvanizing plant and is also an important and key research project. For this reason, Our company has developed Xinyue Brand special multi-component zinc-based alloy for hot galvanizing. It has successfully solved this technical difficult problem and decreased production cost considerably. Through summing up experience of many years and constant improving, the zinc-based alloy has been used in many hot galvanizing plants at home and abroad and played an important role.
Main characteristics:
1. The special purpose of the Xinyue Brand multi-component zinc-based alloy is to eliminate color change and color difference. At the same time it can raise the fluidness of molten zinc, increase brightness and decrease production cost:
Eliminating color difference: the alloy makes coating layer surface smooth, bright and uniform color;
Reducing coating player thickness: the alloy can restrain the influence of silicon, reduce coating player thickness and control coating player thickness according to technical requirement;
Extending zinc pot life: the alloy can prohibit the corrosion of zinc pot by molten zinc effectively, and thus it can expand the service life of the zinc pot;
Reducing zinc ash and slag: the alloy can decrease the oxidation of zinc, restrain the reaction between zinc and iron, eliminate iron and reduce the growth and spallation of float layer and decrease the formation of ash and slag considerably.
Raising coating quality: after using the alloy, improved metallographic structure can make coating layer structure closer, adhesion stronger and coating surface brighter and more beautiful.
Increasing fluidness: After addition of the alloy in to molten zinc, its fluidness increases by more than two times (under the same temperature). Because of good fluidness, the list edge and burr of workpiece from zinc pot are decreased, the product quality is guaranteed, pure zinc player thickness is reduced and the aim of zinc saving is realized;
Reducing galvanizing temperature: After addition of the alloy in to molten zinc, the galvanizing temperature can decrease from 460-480℃ to 425-445℃ and a lot of energy can be saved. Zinc ash and zinc slag are reduced by over 20% and over 30% respectively. The corrosion of zinc pot and the formation amount of harmful gas and dust are decreased. The work environment is improved and the labor intensity of workers is decreased;
Increasing wettability: After addition of the alloy in to molten zinc, the wettability of molten zinc to workpiece increases effectively and galvanization-missing decreases.
