Preparation method of metal anti-corrosion hydrophobic film layer

A hydrophobic film and anti-corrosion technology, which is applied in the direction of metal material coating process, coating, liquid chemical plating, etc., can solve the problems of self-healing effect, etc., to improve corrosion resistance and hydrophobicity, and easy to use raw materials Obtain and improve the effect of corrosion resistance

Inactive Publication Date: 2013-12-11
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the film layer is damaged and the substrate is corroded, there is no self-healing effect, and the corrosion will further occur.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of sol:

[0032] Dissolve 16ml tetraethyl orthosilicate in 38.4ml ethanol solvent, add 7.52ml n-octyltriethoxysilane after dissolving, stir for a period of time, add 18.6ml acidic aqueous solution (10v%HNO 3 ), continue to stir for 3h, and age the reacted sol at room temperature for 24h to obtain the sol for preparing the film layer.

[0033] (2) Prepare the film layer on the metal surface:

[0034] Immerse the metal substrate in the sol obtained in step (1), and lift it out of the sol slowly and uniformly at a speed of 1 mm / s by vertical pulling method, and after drying at room temperature, place it in a muffle furnace for heat treatment. The heating rate of ℃ / min was raised to 180 ℃, kept for 60 minutes, cooled at room temperature and stored for later use.

[0035] The static contact angle of the film layer is 92°. After soaking in 3.5wt% NaCl neutral solution for 16 days, only a few corrosion spots appeared locally, and no corrosion spots were seen ...

Embodiment 2

[0037] (1) Preparation of sol:

[0038] Dissolve 16ml tetraethyl orthosilicate in 38.4ml ethanol solvent, add 7.52ml n-octyltriethoxysilane after dissolving, stir for a period of time, add 18.6ml acidic aqueous solution (10v%HNO 3 ), finally add 0.005mol / L cerium nitrate (Ce(NO 3 ) 3 ·6H 2 O), continue to stir for 3h, and age the reacted sol at room temperature for 24h to obtain the sol for preparing the film layer.

[0039] (2) Prepare the film layer on the metal surface:

[0040] Immerse the metal substrate in the sol obtained in step (1), and lift it out of the sol slowly and uniformly at a speed of 1 mm / s by vertical pulling method, and after drying at room temperature, place it in a muffle furnace for heat treatment. The heating rate of ℃ / min was raised to 180 ℃, kept for 60 minutes, cooled at room temperature and stored for later use.

[0041] The static contact angle of the film layer is 115°, and no corrosion spots appear after soaking in 3.5wt% NaCl neutral solut...

Embodiment 3

[0043] (1) Preparation of sol:

[0044] Dissolve 16ml tetraethyl orthosilicate in 38.4ml ethanol solvent, add 7.52ml n-octyltriethoxysilane after dissolving, stir for a period of time, add 18.6ml acidic aqueous solution (10v%HNO 3), continue to stir for 3h, and age the reacted sol at room temperature for 168h to obtain the sol for preparing the film layer.

[0045] (2) Prepare the film layer on the metal surface:

[0046] Immerse the metal substrate in the sol obtained in step (1), and lift it out of the sol slowly and uniformly at a speed of 1 mm / s by vertical pulling method, and after drying at room temperature, place it in a muffle furnace for heat treatment. The heating rate of ℃ / min was raised to 180 ℃, kept for 60 minutes, cooled at room temperature and stored for later use.

[0047] The static contact angle of the film layer is 119°. After soaking in 3.5wt% NaCl neutral solution for 16 days, only a few corrosion spots appeared locally, and no corrosion spots were foun...

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Abstract

The invention discloses a preparation method of a metal anti-corrosion hydrophobic film layer, and belongs to the technical field of material engineering. A metal matrix surface is coated with a film by adopting a sol-gel method; the prepared film layer does not crack, has a compact structure, and is good in anti-corrosion performance and hydrophobic property; especially, after the sol-gel film layer is mixed with a corrosion inhibitor (cerate), the self-repairing performance to a certain extent can be acquired, the anti-corrosion capability can be improved, the hydrophobic property can be remarkably improved, and the static contact angle can reach 125 degrees; the preparation method can solve various problems that the hydrophobic property of the surface obtained after the modification by adopting various surface processing technologies is comparatively poor, the traditional surface processing technology is complicated in process, the equipment requirement is high, the environment is polluted, and the energy source consumption is great, and the method is suitable for the metallic material field in aviation, spaceflight, vessel and automobile industries; besides, the technology adopted by the method is simple, the raw materials are easy to get, the equipment investment is low, and the economic return is high.

Description

technical field [0001] The invention belongs to the technical field of material engineering, relates to the technical field of metal surface modification, and more specifically relates to a metal surface anticorrosion and hydrophobic treatment method. Background technique [0002] Metal is a substance with luster, ductility, electrical conductivity, and thermal conductivity. In various sectors of the national economy, etc. have been widely used. In particular, some aluminum alloys, magnesium alloys, titanium alloys, etc. are widely used in the aerospace industry, electric power appliance industry, and transportation industry. However, metal materials are easily corroded and damaged by the surrounding medium, which will significantly reduce the mechanical properties of metal materials such as strength, plasticity, and toughness, destroy the geometry of metal components, increase wear between parts, and deteriorate electrical and optical physical properties. performance, sho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/12
Inventor 吴俊升潘晓铭李晓刚肖葵
Owner UNIV OF SCI & TECH BEIJING
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