Fabrication Of Super-hydrophobic Surface On Q235 Metal And Aluminium Substrate And Their Anti-corrosion Properties

The construction of super-hydrophobic anti-corrosion surface on the metal matrix is a green,environmentally friendly anti-corrosion technology.Super-hydrophobic surface has many excellent performance,such as super-hydrophobic,self-cleaning,low adhesion,anti-icing,anti-biological adhesion and others.It has a wide range of applications.Ultra-hydrophobic anti-corrosion surface has an important impact on the development of metal materials protection technologyThe preparation of super-hydrophobic surfaces is usually accomplished by constructing a micro-nano secondary structure on the surface of the material while treating such a structure with a low surface energy substance.The most important and interesting in these two factors is the micro-nanostructures of the surface of the material.Methods of preparasting micro-nano secondary structure are varied.This article includes the following:(1)Preparation of super-hydrophobic anti-corrosion surface on Q235 steel substrate by chemical etching and low surface energy modification.And then we explored the impotant effects of various components in the etching solution and low surface energy coating on super-hydrophobic anti-corrosion surface.The hydrophobicity was best when the PDMS(low surface energy)was coated on the surface of the Q235 steel treated with the etchant containing 20% nitric acid and the contact angle with water was 163 °.(2)Preparation of super-hydrophobic anti-corrosion surface on Q235 steel substrate wth the method of physical vapor deposition and low surface energy modification.And then we explored the impotant effects of physical vapor deposition coating time,low surface energy coating and others super-hydrophobic anti-corrosion surface properties.Under the same other conditions,the physical vapor deposition time plays a major role in the surface roughness of Q235 steel.With the increase of the time of physical vapor deposition coating,the roughness increases first and then increases.Through the electrochemical test data and other relevant data can be seen,multi-arc ion platingtechnology to increase the thickness of the coating to increase the corrosion resistance of Q235 steel surface.(3)Preparation of super-hydrophobic anti-corrosion surface on Al2024 by the anodic oxidation technology and low surface energy modification.And then we explored the effects of electrolyte composition in anodic oxidation and the time of anodic oxidation,low surface energy coating on super-hydrophobic anti-corrosion surface properties.At the same anodic oxidation time,the surface roughness of aluminum 2024 material plays a major role in the process of anodic oxidation current density,with the anodic oxidation process in the current density increases,the roughness showed first increased gradually after the steady development trend.with the same anodic oxidation current density,the anodic oxidation time is the main effect on the surface roughness of the aluminum 2024 material.With the increase of the time of the anodic oxidation current,the roughness shows the trend of increasing the temperature and gradually becoming stable.The surface morphology of the samples was observed by scanning electron microscopy(SEM).The surface morphology of the samples was observed by laser scanning confocal microscopy(CLSM).The contact angle was measured by contact angle measuring instrument,the XRD characteristics of the samples were characterized by XRD,and the content and distribution of the elements were characterized by EDS.We characterized the properties of the super-hydrophobic anti-corrosion surface on the metal matrix prepared under different conditions.Finally,the corrosion resistance of these superhydrophobic surfaces was tested by electrochemical workstation and others.The effects of different processes on the superhydrophobic surface of the prepared metal matrix and its corrosion resistance were systematically studied.