Post-processing of galvanised steel strip

Post-treatment of galvanised steel strip includes three aspects, passivation, pre-phosphating and oiling. The first step is to passivate the galvanised steel strip, which can improve the surface structure and luster of the galvanised layer, improve the corrosion resistance and service life of the galvanised layer, and improve the combination of the coating and the base metal. Passivation treatment mainly uses chromate passivation. Add some activators in the passivation solution, such as fluoride, phosphoric acid or sulfuric acid, etc., so that the passivation to get a thicker chromate film. When there is fluoride in the passivation solution can reduce the surface tension of the steel strip, accelerate the film-forming reaction, and can increase the chemical polishing effect, so that the passivation film is detailed and bright.

The application of galvanised steel strip meets modern needs and is widely used as a building material today. Galvanised steel strip has the characteristics of not rusting and corrosion resistance for many years, it can do not be affected by the external adverse environment, and always keep its own performance and appearance. In the process of using galvanised steel strip, in order to improve its operational efficiency and its own characteristics, galvanised steel strip can be post-treated to the finished product, so that its performance performance is more.