Method for microporous treatment of metal surface

Abstract

The invention belongs to the technical field of material treatment and particularly relates to a method for microporous treatment of a metal surface. The method comprises the following steps: (1) performing anodic oxidation on a preprocessed metal base material to obtain a metal base material provided with an anodic oxide film layer on the surface; (2) soaking the metal base material obtained in the step (1) in etching liquor for treatment; (3) putting the metal base material obtained in the step (2) into an anodic oxidation groove with sulfur acid and ammonium chloride for modification treatment; (4) soaking the metal base material obtained in the step (3) in a phosphate anion solution, washing with water, soaking in a washing regulating agent at a room temperature, washing with water, and baking for 0.5-1 hour. The purpose of pore size expansion is achieved in a condition-controllable AAO (anodic aluminum oxide) film production mode, a problem that a conventional pore-forming method cannot obtain ordered controllable micropores is solved, and strict requirements on various aspects of product size, structure and the like are avoided from a macroscopic perspective.

Description

technical field [0001] The invention belongs to the technical field of material processing, in particular to a method for microporous metal surface treatment. Background technique [0002] In the fields of mobile communication equipment, electronic and electrical equipment, automotive machinery, etc., it is often necessary to spray, bond, and inject the metal surface. In order to improve the bonding strength of surface attachments, it is usually necessary to treat the surface, such as common phosphating, Passivation and processing methods such as creating holes and undercuts, in short, all improve the bonding strength of the metal and the attachment by increasing the surface corrosion resistance and roughness. The traditional way is to use phosphating and passivation to corrode the metal surface by soaking in chemical solution to achieve the purpose of not only protecting the metal surface but also roughening the surface to improve the bonding strength of the metal and the a...

AI Technical Summary

Problems solved by technology

The traditional way is to use phosphating and passivation to corrode the metal surface by soaking in chemical solution to achieve the purpose of not only protecting the metal surface but also roughening the surface to improve the bonding strength of the metal and the attachment. The rough surface obtained by this method is uneven and irregular, and is only suitable for relatively rough and simple protection. The bonding strength of the surface attachment of the treated metal is low. There are many types of conventional methods for making micropores to roughen the surface, such as Patents CN102537066A, CN102145331A, CN1584119A, CN101578018A, etc. propose methods such as laser micromachining, assembly coating, and design of rounded corners and undercut embedding, all of which talk about methods of improving the bonding strength of metal surfaces and attachments from various angles. However, These methods have various problems such as complex operation, high cost, and narrow application to varying degrees, which limit their application to a certain extent.

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