Method for preparing corrosion-resistant super hydrophobic membrane layer on surface of aluminum alloy

Abstract

The invention discloses a method for preparing a corrosion-resistant super hydrophobic membrane layer on a surface of an aluminum alloy. In the method, firstly, a pre milled aluminum alloy matrix is cleaned in turn by deionized water and ethanol in an ultrasonic cleaning instrument; the aluminum alloy matrix is electropolished, anodized and pore-enlarging; the matrix is placed in electrochemical nickel plating liquid to obtain a convex texture on the surface of the matrix, and then the matrix is placed in the electrochemical cobalt plating device to conduct the electrochemical cobalt plating treatment, through the treatment of the above steps, the petal-shaped micro nano rough structure is constructed on the surface of the matrix mainly through the combination of anodizing and electrochemical deposition. Finally, the surface free energy of the treated matrix was reduced by immersion modification in fluorosilane ethanol solution, so that the surface of aluminum alloy obtains the corrosion-resistant super hydrophobic membrane layer, and the corrosion resistance of the aluminum alloy is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of surface modification and anticorrosion of metal materials, and relates to a method for preparing a corrosion-resistant super-hydrophobic film, in particular to a method for preparing a corrosion-resistant super-hydrophobic film on the surface of an aluminum alloy. Background technique [0002] Aluminum and its aluminum alloys are the main structural materials in industry, and the output and consumption are second only to steel. Aluminum alloy has excellent thermal conductivity, machinability, corrosion resistance and high strength, which makes it widely applicable to many industrial fields, and becomes the preferred metal in the fields of aerospace, automobile and ship, electronic machinery and so on. Material. [0003] However, aluminum and aluminum alloys are also inevitably corroded by the influence of corrosive media during use. Common types of aluminum corrosion include: pitting corrosion, exfoliati...

AI Technical Summary

Problems solved by technology

However, most of these methods have the problems of complex preparation process, long duration, poor scalability and inability to implement on a large scale, which seriously restrict the application in actual production.

Images