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Method for preparing composite nano film on metal surface

A metal surface and nano-film technology, applied in the direction of electrolytic organic material coating, etc., to achieve high compactness, high stability, and strong corrosion resistance

Inactive Publication Date: 2012-07-11
NORTHWEST A & F UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem solved by the present invention is to provide a method for preparing a composite nano-film on a metal surface in view of the defects and deficiencies in the existing single surface modification method, so that the metal surface is covered by a dense organic composite nano-film with few defects, thereby Improves corrosion resistance and surface hydrophobic properties of metals

Method used

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  • Method for preparing composite nano film on metal surface
  • Method for preparing composite nano film on metal surface
  • Method for preparing composite nano film on metal surface

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Prepare the base metal of composite nano film on its surface to be the aluminum alloy of designation 5052, and size is 50 * 30 * 0.2 (mm), and its concrete method comprises the following steps:

[0034] 1) Preparation of first layer electrolytic polymerization polymer nano film:

[0035] a. First, clean the aluminum alloy of grade 5052:

[0036] Use acetone to ultrasonically wash the base metal for 10nm, and after drying at room temperature, degrease and decontaminate the metal surface with 10% SK-144 alkali solution at 60°C, then rinse repeatedly with clean water, and use it as a working electrode after drying at room temperature;

[0037]B, with the metal surface after cleaning as working electrode, with SUS304 electrode as auxiliary electrode, saturated calomel electrode as reference electrode, to contain 2.0mmol / L triazine thiol monosalt compound and 0.1mol / L sodium nitrite ( As a supporting electrolyte), the mixed solution is an electrolyte solution, and the elect...

Embodiment 2

[0044] Prepare the base metal of composite nano film on its surface to be the aluminum alloy of designation 5052, and size is 50 * 30 * 0.2 (mm), and its concrete method comprises the following steps:

[0045] 1) Preparation of first layer electrolytic polymerization polymer nano film:

[0046] a. First, clean the aluminum alloy of grade 5052:

[0047] Use acetone to ultrasonically wash the base metal for 5nm, dry it at room temperature, degrease the metal surface with 10% SK-144 alkali solution at 80°C, rinse it repeatedly with clean water, dry it at room temperature and use it as a working electrode;

[0048] B, with the metal surface after cleaning as working electrode, with SUS304 electrode as auxiliary electrode, saturated calomel electrode as reference electrode, to contain 3.0mmol / L triazine thiol monosalt compound and 0.5mol / L sodium sulfite (as support The mixed solution of electrolyte) is the electrolyte solution, and the constant current method is used for electrol...

Embodiment 3

[0055] Prepare the base metal of composite nano film on its surface to be the steel sheet of grade 304, and size is 50 * 30 * 0.2 (mm), and its concrete method comprises the following steps:

[0056] 1) Preparation of first layer electrolytic polymerization polymer nano film:

[0057] a. First, clean the steel sheet of grade 304:

[0058] Use acetone to ultrasonically wash the base metal for 15nm, dry it at room temperature, degrease the metal surface with 10% SK-144 alkali solution at 75°C, rinse it repeatedly with clean water, dry it at room temperature and use it as a working electrode;

[0059] B, with the metal surface after cleaning as working electrode, with Pt electrode as auxiliary electrode, saturated calomel electrode is reference electrode, to comprise 3.0mmol / L triazine mercaptan monosalt compound and 0.1mol / L sodium carbonate (as The mixed solution of supporting electrolyte) is the electrolyte solution, and the electrolysis is carried out by constant current met...

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Abstract

The invention discloses a method for preparing a composite nano film on a metal surface and realizes the preparation of the composite nano film by combining electrolysis polymerization with nano self-assembly technology. The method comprises the following steps of: electrolyzing and polymerizing a macromolecular initial-layer nano film bonded with the metal surface through a covalent bond on a cleaned metal surface by an electrolysis polymerization method; and then immersing the macromolecular initial-layer nano film into self-assembly solution and assembling and forming a polymeric macromolecular nano film bonded with an initial-layer macromolecular nano film through a covalent bond by nano self-assembling technology. Due the adoption of the method, the conversion of the metal surface from hydrophilcity to hydrophobicity is realized, the less defects, strong hydrophobicity, corrosion resistance and strong adhesiveness of a modified metal surface are achieved and effective long-term protection for metal materials is realized.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment and surface modification, and relates to a method for preparing a composite nano film on a metal surface. Background technique [0002] For more than half a century, chromium passivation, as a main surface treatment technology for metal materials, has been widely used in different industrial fields, such as automobile, aircraft and shipbuilding industries. However, Cr contained in chromium compounds 6+ Toxicity and carcinogenicity have seriously hindered the continued use of this process. With the strengthening of people's awareness of environmental protection in recent years, it is imperative to develop "green surface treatment technology". [0003] Nanomaterials exhibit special physical, chemical and other functional properties due to their nanoscale effects, and have been widely used in various fields. Nano-film materials play an extremely important role in the surface functi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D9/02
Inventor 王芳张志毅王茜刘俊俊王亚斌李彦妮
Owner NORTHWEST A & F UNIV
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