How to Control Zinc Thickness in Continuous Hot-Dip Galvanizing of Iron Wire
Author: Robby
The main methods of controlling the thickness of the zinc layer in continuous hot-dip galvanizing of iron wire include adjusting the vertical method, controlling the line speed and temperature of the operation, and adding specific elements. First, the adjusted vertical method is a common method of controlling the thickness of the zinc layer. By increasing the length of wire immersion in the pot, the galvanizing time can be extended, thereby increasing the thickness of the coating. Conversely, shortening the immersion length decreases the coating thickness. This method allows you to control the thickness of the coating by adjusting the ratio of pure zinc to alloy without changing the original galvanizing speed.
Secondly, controlling line speed and temperature are also important controls. The line speed affects the uniformity of the coating thickness, and increasing the strip speed may result in an uneven coating. By accurately controlling the galvanizing temperature and time, the thickness of the coating can be better controlled, especially at high temperatures where the zinc dipping time can be reduced, thus controlling the thickness of the coating.
Finally, the addition of specific elements such as bismuth can also affect the thickness of the coating. Bismuth can reduce the surface tension of the zinc solution and improve the wettability, which is conducive to obtaining a flat and smooth coating. It can also reduce the thickness of pure zinc layer and reduce zinc consumption.
Through these methods, the thickness of zinc layer in the continuous hot-dip galvanizing process of iron wire can be effectively controlled to ensure the consistency of product quality.