Large-scale preparation method for aluminum or aluminum alloy anti-frosting surface

• Main Authors: ZHANG HAIFENG, LIU XIAOWEI, TUO YANJING, RONG WANTING
• Format: Patent
• Language: Chinese; English
• Published: 15.03.2019
• Subjects: APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; CHEMICAL SURFACE TREATMENT; CHEMISTRY; CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICALMETHODS OTHER THAN ELECTROLYSIS; 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; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25; NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; PERFORMING OPERATIONS; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; SPRAYING OR ATOMISING IN GENERAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING

The invention discloses a large-scale preparation method for an aluminum or aluminum alloy anti-frosting surface. The preparation method includes the following steps: first, the aluminum or aluminum alloy is etched in HCl solution through a chemical corrosion method to obtain a rough surface with the micron structure, second, a nanometer-scale roughness structure on the rough surface is grown by adopting the method of hydrothermal synthesis in a boiling water bath to obtain a micro-nanometer composite binary rough surface, and finally a surface with super-hydrophobic property is obtained by the modification of a resin low-surface-energy substance. The preparation method has the advantages that the method is simple, the requirements for equipment are low, a traditional modified fluoride molecular layer is replaced with the resin, the durability of the super-hydrophobic surface is greatly improved, the production cost is reduced, and the super-hydrophobic surface prepared according to the method is characterize