What is the effect of bath temperature on galvanized iron wire?
The temperature of the galvanized wire should be controlled at 30-50 °C. Since the chloride ion in the plating solution is highly corrosive, a quartz glass heater is generally used.
Continuous heating does not require heating, but cooling is required. Cooling can be arranged in the thin-walled plastic pipe at the side of the tank, and it can be cooled by flowing tap water. Titanium pipe can also be used as a temperature control device.
The galvanized iron wire is stirred in the composite plating process to obtain a composite coating in which the particles are dispersed in the matrix metal. The stirring method includes mechanical stirring, air stirring, ultrasonic stirring, plating liquid circulation, and the like.
The acid activation solution in the production process can remove the rust products and oxide film on the surface of the low carbon steel wire without excessive corrosion of the substrate. The galvanized wire may be treated with zincate galvanizing or chloride galvanizing, and suitable additives should be used to obtain the coating required for the low carbon steel wire standard. When the galvanized wire is light-plated, it should be light-treated. The temperature of the plating solution of the galvanized iron wire should be controlled.
When the thickness of a good galvanized wire or plated part is 3-4 mm, the amount of zinc adhered should be less than 460 g/m, that is, the average thickness of the zinc layer is not less than 65 μm; when the thickness of the plated part is greater than 4 mm, the amount of zinc adhered It should be no less than 610 g/m, that is, the average thickness of the zinc layer is not less than 86 μm; the plating of the standard galvanized wire must be uniform, and the galvanized layer is substantially uniformly etched five times without iron by the copper sulfate solution.
For the adhesion requirements of the standard galvanized wire coating, the zinc layer of the plated part should be firmly bonded to the base metal and have sufficient adhesion strength, and does not fall off after the hammering test, and does not bulge.