Method for surface adjustment and phosphating before automobile coating

• Main Authors: HUANG PING, YANG MEI, LIU YANPING, FENG CHANGBO, WU YAOYAO, QIN CAIMEI
• Format: Patent
• Language: Chinese; English
• Published: 06.06.2023
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

The invention discloses a method for surface conditioning and phosphating before automobile coating. The method comprises the following steps: S10, mixing a surface conditioning agent solution with a neutralizer and water to obtain a surface conditioning mixed solution; s20, a vehicle body is placed in the surface conditioning mixed liquid, surface conditioning treatment is conducted on the vehicle body, and the vehicle body subjected to surface conditioning treatment is obtained; s30, the automobile body subjected to surface treatment is subjected to phosphating treatment in phosphating treatment liquid, and the automobile body subjected to phosphating treatment is obtained; wherein the molar concentration of zinc ions in the surface conditioning mixed solution is 0.6 to 2.0 mol/L. By using the surface conditioning agent solution, a premixing procedure of a traditional powder product is not needed, so that the problems of dust pollution on site and incomplete premixing are avoided, and the quality performanc