The so-called auxiliary plating is to immerse the pickled workpiece in a certain composition of auxiliary plating agent, and then form a thin protective film on the surface of the workpiece.
Author: Marisa
The so-called auxiliary plating is to immerse the pickled workpiece in a certain composition of auxiliary plating agent, and then form a thin protective film on the surface of the workpiece.
The functions of hot-dip galvanizing mainly include the following aspects:
1.Clean and activate the surface: The plating agent can remove oxides, iron salts and other pollutants on the steel surface to ensure that the steel surface is clean. At the same time, it forms a plating film on its surface to isolate the air and prevent further oxidation.
2.Improve wetting ability: The salt film formed by the plating agent on the steel surface can reduce the surface tension, enhance the wetting ability of the zinc liquid on the steel surface, and enable the zinc liquid to better adhere to the steel surface and promote the alloying process.
3.Promote alloy reaction: The plating agent can promote the reaction between the steel surface and the zinc liquid to form an iron-zinc alloy layer, thereby improving the adhesion and corrosion resistance of the coating.
4.Reduce environmental pollution: Traditional plating agents such as zinc chloride and ammonium chloride will produce a lot of smoke and harmful gases during use, which will harm the environment and the health of operators. Smokeless plating agents such as sulfates can effectively reduce these pollutions and meet the requirements of green development.
5.Improve the quality of the coating: Smokeless plating agents can not only reduce smoke pollution, but also improve the quality of the coating, ensure that the coating is uniform and dense, and improve the overall performance of the product.