The quality of zinc-aluminum alloy is crucial. Poor quality alloy can lead to defects such as rough zinc particles appearing on the surface of the galvanized coating after being added to the zinc bath. Therefore, the grade of aluminum ingots and zinc ingots used to produce zinc-aluminum alloy must be high, typically grade 0 or grade 1, with an iron content not exceeding 0.003%.
When casting zinc-aluminum alloy blocks in a smelter, zinc and aluminum should be melted at a temperature of 650-700°C and held at this temperature for 1.5-2 hours with constant stirring to ensure thorough mixing. Stirring should also be continued during pouring.
