Composite silane film for metal surface and preparation method

A technology of composite silane film and metal surface, applied in anti-corrosion coatings, coatings and other directions, can solve problems such as local corrosion and scaling, and achieve the effects of high compactness, simple preparation method and easy large-scale production

Inactive Publication Date: 2017-08-29
NANJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a composite silane film for metal surfaces and its preparation method, which can be used for anti-corrosion and an

Method used

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  • Composite silane film for metal surface and preparation method
  • Composite silane film for metal surface and preparation method
  • Composite silane film for metal surface and preparation method

Examples

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Embodiment 1

[0030] (1) 304 stainless steel surface chemical pretreatment method

[0031] Cut 304 stainless steel into 1×2cm 2 The rectangular substrate was neutralized with 0.01M HCl solution to remove iron filings on the surface, and treated with 1mol / L NaOH solution for 1 hour to hydroxylate the surface of the stainless steel. Rinse with deionized water and dry for later use.

[0032] (2) Silanization of metal surface

[0033] Add 1,2-bis(triethoxysilyl)ethane to the ethanol-water mixture with a volume ratio of 23:7, so that the volume of 1,2-bis(triethoxysilyl)ethane The percentage is 7%. The 1,2-bis(triethoxysilyl)ethane / ethanol solution should be hydrolyzed for 48 hours before use. Immerse the pretreated 304 stainless steel in the silane solution for 30 minutes, take it out, wash it with isopropanol, absolute ethanol, and acetone to remove excess 1,2-bis(triethoxysilyl)ethane, and dry it at room temperature Then thermal curing treatment was performed at 65° C. for 30 minutes. A...

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Abstract

The invention discloses a composite silane film for metal surface. The composite silane film comprises a bihydrolysis head based silane layer and a monohydrolysis head based fluorine-containing silane layer. The composite silane film can be used for preventing corrosion and scaling, solves the problem that existing metal is prone to local corrosion and scaling in bad working conditions like seawater, sewage and chemical media and is high in compactness and superior in corrosion-resistant effect.

Description

technical field [0001] The invention belongs to the field of chemical materials, in particular to a metal anti-corrosion and anti-fouling film, in particular to a preparation method for a composite silane self-assembled film used to resist seawater corrosion on the surface of stainless steel. Background technique [0002] With the development of modern industry, people put forward higher requirements for the anti-corrosion and anti-scale of metal surface. Among them, stainless steel with good corrosion resistance and plasticity is widely used, such as pipelines, sea water pumps, valves, fasteners, propellers, instrument housings, etc. The reason why stainless steel has good corrosion resistance is that the Cr and Ni passivation films on its surface have self-healing properties. However, under harsh conditions, such as seawater, the self-healing performance of the surface passivation film is inhibited under long-term immersion, which will cause localized corrosion and easy s...

Claims

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Application Information

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IPC IPC(8): C09D183/08C09D5/08C08G77/24C08G77/06
CPCC09D183/08C08G77/06C08G77/24C09D5/08
Inventor 王昌松宋健周家栋陆小华王昊宇
Owner NANJING UNIV OF TECH
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