Post-treatment of galvanized strip steel includes three aspects, passivation, pre-phosphorization and oiling. Firstly, passivation treatment of the galvanized steel strip can improve the surface structure and gloss of the galvanized layer, improve the corrosion resistance and service life of the galvanized layer, and improve the bonding force between the coating and the base metal. Passivation treatment mainly uses chromate passivation. Adding an activator such as fluoride, phosphoric acid or sulfuric acid to the passivation solution results in a thicker chromate film after passivation. When there is fluoride in the passivation solution, the surface tension of the steel strip can be lowered, the film formation reaction can be accelerated, and the chemical polishing effect can be increased to make the passivation film fine and bright.galvannealed steel sheet suppliers
The application of galvanized strip steel meets modern needs and is now widely used as a building material. The galvanized strip steel has many years of no rust and corrosion resistance. It can be protected from the adverse environment and maintain its performance and appearance. In the process of using galvanized steel strip, in order to improve its working efficiency and its own characteristics, the galvanized strip steel finished product can be post-treated to make its performance better.
Galvanized strip steel is generally used to make steel pipes, such as greenhouse pipes, drinking pipes, heating pipes, gas pipes; it can also be used in construction, light industry, automobile, agriculture, animal husbandry and fishery and commercial industries.
The construction industry is mainly used to manufacture anti-corrosion industrial and civil building roof panels, roof grills, etc.; the light industry uses it to manufacture home appliance casings, civil chimneys, kitchen utensils, etc., and the automotive industry is mainly used to manufacture corrosion-resistant parts for cars, etc. Agriculture, animal husbandry and fishery are mainly used for grain storage and transportation, frozen processing tools for meat and aquatic products, etc.; commercial is mainly used as storage and transportation equipment for materials; steel structure sandalwood (C, Z-shaped steel); light steel keel, suspended ceiling Keel and so on.