Study on the composition and properties of passivation films on galvanized sheets

This paper describes the basic process flow of the galvanized sheet production line and the electrical composition, hardware configuration and network structure of the system of the control system of the galvanized sheet production line. A kind of calcium-containing zinc-manganese ternary cationic phosphating solution for steel plate and galvanized plate treatment is characterized by that it consists of adding the following components in water. Introduces the actual measurement of galvanized sheet phosphating film in the electrophoresis process of the dissolution amount and the determination of the influence on the electrophoresis paint liquid process parameters, through the test results of galvanized sheet low zinc phosphating film acid and alkali corrosion resistance is better than the general zinc phosphating film.

The weight of the galvanized sheet is divided into two parts: the weight of the steel plate and the weight of the zinc layer, the weight of the zinc layer as a percentage of the galvanized sheet roughly how much? Only an approximate figure, or an interval is needed.

Steel plate in the galvanized surface to be passivated, but sometimes the performance of the passivation agent is not stable, passivation effect is not ideal phenomenon, resulting in production can not be carried out smoothly. The composition and structure of the passivation film determines its performance, so this paper discusses the composition and corrosion resistance of the passivation film on galvanized sheet. This test used SEM and TEM method to observe the morphology of the passivation agent liquid, SEM observed the morphology of galvanized plate after passivation, passivated zinc plate surface becomes flat, defects are reduced; and the chemical composition of the passivation film was detected by EDS, the film contains Zn, O, Cr, C; the application of the AES surface analysis method detected the change of the elements with the thickness of the film, in addition to the Zn outside of the elements with the increase in thickness, content decreased with the film, and the thickness of the film was increased. The content of Cr,O,C,Zn,P,N,F,Si in the passivation film was detected by XPS technique and the relative content of each element was determined, and they mainly consisted of CrPO_4,Cr(OH)_3,CrOOH,Cr_2O_3,CrO_3,ZnO,Zn(OH)_2,Zn_3(PO_4)_2,H_2O,NH_2O,H_2O,H_2O,H_2O,H_2O,H_2O,H_2O,H_2O,H_2O,H_2O,H_2O. 2O, NH_3, organic molecules, and silica sols were present in the passivation films. The adhesion of the two passivation films was tested, and S1 was better than T1; the anodic polarization curves of the galvanized sheet and the two passivation films were tested, and the corrosion resistance of S1 film was higher than that of T1 film; and the results of the salt spray test showed that the corrosion resistance of S1 film was better. According to the test results, this paper boldly speculates the chemical reactions that may occur during the passivation process, and believes that the generation of passivated film supports the theory of phase-forming film.

The composition and structure of the passivation film determines its performance, so this paper discusses the composition and corrosion resistance of the passivation film of galvanized sheet, galvanized sheet is composed of these three parts of the top structure of the luxury kiosk, 304 stainless steel factory kiosk, which is the luxury ceiling decorative plate. Galvanized Sheet Degreasing and Rust Remover, Industrial Cleaner, Fine Chemicals_For Galvanized Sheet Aluminum Plated Sheet Introduction This product is mainly surfactants, corrosion inhibitors and water composition, which is free of heavy metals, phosphorus, nitrous acid and other controlled substances in the composition of the composition of the galvanized steel production process, hot rolled steel, electromagnetic steel, used in steel, explosion welding, screws, class technical information ... The final component assembly is composed. Disclosure of a bake-hardenable cold-rolled steel sheet with high strength and excellent aging resistance for use as an exterior panel of a vehicle body, The invention relates to an exposed sheet or galvanized steel sheet.