Preparation method of organic/inorganic composite coating

An inorganic composite and polymer coating technology, which is applied in coatings, metal material coating processes, electrolytic coatings, etc., can solve the problems of easy breakage and forming of coatings, and achieve positive corrosion potential, good stability and protection , good anti-corrosion effect

Inactive Publication Date: 2016-09-21
BEIHANG UNIV
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  • Description
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  • Application Information

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Problems solved by technology

In order to overcome the problems that the nano-inorganic metal oxide coating is easily broken and the organic polymer coating is difficult to form on the surface of the metal substrate, the present invention provides a method for preparing an organic / inorganic composite coating, which firstly forms a nano-inorganic metal oxide coating on the metal surface. The coating of the object, and then grow the organic polymer coating, and finally form a composite coating

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  • Preparation method of organic/inorganic composite coating
  • Preparation method of organic/inorganic composite coating
  • Preparation method of organic/inorganic composite coating

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1. prepares nano-titanium dioxide / polyaniline composite coating

[0026] The preparation process of titanium dioxide sol was as follows: 60 mL of tetraisopropyl titanate was mixed with 1 mL of isopropanol, and slowly added dropwise to a mixture of 100 mL of acetic acid and 300 mL of deionized water, and the temperature of the mixture was kept at 0 degrees Celsius during the dropping process. The resulting mixture was reacted at 70 degrees Celsius for 8 hours under constant stirring. The obtained white sol was transferred to a polytetrafluoroethylene reactor and reacted for 24 hours under the condition of 180 degrees Celsius to obtain a nano-titanium dioxide sol.

[0027] Using 316L steel with a size of 20mm long*10mm wide*2mm thick as the base, use 3000-grit sandpaper to moderately polish the steel base, then wash it in acetone, ethanol, and deionized water for 10 minutes, and dry it. Immerse the sample into the nano-titanium dioxide sol with an immersion pu...

Embodiment 2

[0031] Embodiment 2. preparation nano zinc oxide / polypyrrole composite coating

[0032] The preparation process of zinc oxide sol is as follows: first configure a solution in which the solvent is water and ethanol, the solute is zinc acetate and polyethylene glycol 400, the total volume of the solution is 500mL, the volume ratio of water and ethanol is 1:1, and zinc acetate is in the final solution The concentration in the solution is 2mol / L, the mass fraction of polyethylene glycol 400 in the final solution is 2%, under the condition of full stirring, gradually add ammonia water to make the zinc ions first form Zn(OH) 2 The precipitate is gradually dissolved into nano-scale Zn(OH) 4 2- Sol. Stop adding ammonia water when the pH of the sol measured by pH test paper is 10-11, and the sol preparation is completed.

[0033] Using 316L steel with a size of 20mm long * 10mm wide * 2mm thick as the base, use 3000-grit sandpaper to moderately polish the steel sheet, then wash in a...

Embodiment 3

[0036] Embodiment 3. preparation nano-titanium dioxide / polypyrrole composite coating

[0037] The preparation process of titanium dioxide sol is as follows: 30mL of tetraisopropyl titanate is mixed with 1mL of isopropanol, slowly added dropwise to the mixed solution of 80mL acetic acid and 240mL deionized water, and the temperature of the mixed solution of acetic acid and deionized water is maintained during the dropping process is 0 degrees Celsius. The resulting mixture was reacted at 90 degrees Celsius for 8 hours under constant stirring. The obtained white sol was transferred to a polytetrafluoroethylene reactor and reacted for 24 hours under the condition of 230 degrees Celsius to obtain a nano-titanium dioxide sol.

[0038] Using 316L steel with a size of 20mm long*10mm wide*2mm thick as the base, use 3000-grit sandpaper to moderately polish the steel base, then wash it in acetone, ethanol, and deionized water for 10 minutes, and dry it. Immerse the sample into the nan...

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Abstract

The invention discloses a preparation method of an organic/inorganic composite coating and belongs to the technical field of function material and metal surface protection. The preparation method comprises steps as follows: metal substrate pretreatment and preparation of a nanometer inorganic metal oxide coating and an organic polymer coating. According to the preparation method of the organic/inorganic composite coating, the nanometer inorganic metal oxide coating is taken as an inner layer, the organic polymer coating is taken as an outer layer, and through sufficient combination of respective advantages of organic metal oxide and organic polymer, the nanometer inorganic metal oxide/organic polymer composite coating with better protective performance is prepared. The inorganic metal oxide coating provides a good substrate for growth of the organic polymer coating, breakage of the inorganic metal oxide coating is avoided by means of coverage of the organic polymer coating, and the composite coating has better stability and protective performance. Compared with a single coating, the composite coating has more positive corrosion potential, higher resistance and better corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of functional materials and metal surface protection, and relates to a metal surface anticorrosion technology, that is, the preparation of a novel nano-inorganic metal oxide / organic polymer composite coating, which can effectively reduce the electrochemical corrosion of the metal surface. Background technique [0002] When metal products, especially steel, are exposed to air, severe corrosion will occur. In order to reduce corrosion, there are three commonly used methods: 1. Sacrificial metal anodic protection method, such as sacrificial zinc anode to protect metal iron; 2. Chromateization of metal surface, chromate can inhibit the corrosion of metal, but chromate itself There is also greater toxicity and greater harm to the environment; 3, the surface is sprayed with a protective layer. [0003] The third method is the most common because of its low cost and simplicity. Among them, inorganic materials suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C20/08C25D13/08C23F17/00
CPCC23C20/08C23F17/00C25D13/04
Inventor 翟锦刘庆青
Owner BEIHANG UNIV
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