Nanopore array film on stainless steel surface and preparation method thereof

Abstract

The invention particularly relates to a stainless steel surface nano-pore array film and a preparation method thereof. The technical scheme is that: stainless steel treated by surface pretreatment is used as an anode and is placed in a phosphate buffer solution to perform electrochemical anodic oxidation treatment; the time for the electrochemical anodic oxidation treatment is 0.1-4 h; a nano-pore array film is obtained on the treated stainless steel surface; the voltage for the electrochemical anodic oxidation is 10-80 V, and the temperature for the electrochemical anodic oxidation is -5 to 40 DEG C. The preparation method of the invention is simple, effective, environment-friendly, and low in cost; the stainless steel surface nano-pore array prepared by the method has a structured and ordered structure, a high density, a controllable pore diameter and pore depth, and no other impurity elements intervened, is firmly combined with the substrate, and has strong corrosion resistance andhigh hardness.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a stainless steel surface nanohole array film and a preparation method thereof. Background technique [0002] In recent years, the study of nanostructured materials has attracted more and more researchers' attention, especially the nanostructures of various inorganic materials, because nanostructured materials usually have unique mechanical, electrical and magnetic properties. , so that it can be widely used in the field of advanced technology, and greatly develop the market prospect of the material. Stainless steel has become a new research object of nanomaterials because of its good corrosion resistance, comprehensive mechanical properties, and simple processing technology. [0003] At present, the research methods of stainless steel surface nanostructure mainly include coating method, deposition method and anodic oxidation method. Among them, the thin ...

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Problems solved by technology

Although drug-loaded micropores with adjustable sizes between submicron and micron scales were prepared on the surface of stainless steel, there was an obvious interface between the sputtered layer obtained by this method and the stainless steel substrate, and the aluminum coating was easily peeled off from the substrate; The density of the prepared micropores is small, and the shape of the micropores is irregular

"Nanoscopic studies of stainless steel electropolishing" (V.Vignal, J.C.Roux, S.Flandrois, A.Fevrier.Nanoscopic studies of stainless steel electropolishing.Corros.Sci.2000, 42:1041) and "Stainless Steel Anodized Layer Self-organization of nanoscaled pores in anodic oxide overlayer on stainless steels. Electrochim. Acta. 2009, 54: 3086) The technology of making nano-pit structure directly on the surface of stainless steel through anodic oxidation method, the solution used is a mixed solution of ethylene glycol butyl ether and an appropriate amount of perchloric acid, the depth of the obtained micro-pit is small, which limits the application of nano-structure

[0005] So far, there has been no report on the preparation of nanoporous array films on the surface of stainless steel by electrochemical anodic oxidation in a solution containing phosphate