Nano passivation coating galvanized sheet and production process thereof

• Main Authors: ZHU JIE, YU SHUYUN, RUAN LISHA, ZHU JING, CHEN YUZHE, DING YUANYUAN, ZHOU TENGBIN, LIU FU
• Format: Patent
• Language: Chinese; English
• Published: 04.06.2021
• Subjects: APPARATUS THEREFOR; 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; ELECTROFORMING; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

The invention discloses a nano passivation coating galvanized sheet and a production process thereof, and belongs to the technical field of galvanized sheet protection. The production process comprises the steps that a galvanized coating is firstly formed on the surface of a metal substrate by adopting electrogalvanizing or hot galvanizing; then passivation treatment is carried out on the surface of a galvanized sheet at low temperature by using a chromium-free passivation solution, and a colorless transparent passivation layer is formed; and finally, the passivation layer is coated with a nanometer passivation coating containing nanometer filler of a lamellar and granular structure in a roller coating manner, and the nanometer passivation coating galvanized sheet is obtained. The galvanized sheet produced by the production process comprises the metal substrate, the colorless transparent passivation layer arranged on the surface of the metal substrate in a coating manner and the nano passivation coating arran