Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Silanization treatment method before coating of steel piece

A technology of silanization treatment and silanization, which is applied in the direction of metal material coating process, etc., to achieve the effects of enhancing bonding strength, improving coating bonding force, and improving corrosion resistance and aging resistance.

Inactive Publication Date: 2011-06-15
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
View PDF0 Cites 25 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a pretreatment method for coating organic coatings on iron and steel parts to solve the problem of bonding between steel parts and coatings in the prior art

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1. Material preparation: Q235 steel sheet, using conventional grinding, sandblasting and polishing, sandblasting the surface of the steel part with a dry sandblasting machine for grinding, polishing the surface of the sample with a water polishing machine, SiC sandpaper Grind to 600#.

[0043] 2. Degreasing: NaOH 50g / L, NaOH 2 CO 3 25g / L, Na 3 PO 4 12H 2 O 30g / L, Na 2 SiO 3 12g / L, the balance is water, the temperature is 80-90°C, and the time is to remove the oil. After degreasing, the test piece is rinsed with natural water, and then rinsed with deionized water.

[0044] 3. Soak in silane solution: The silane solution is prepared by coupling agent KH560, deionized water and anhydrous methanol in a weight ratio of 12:16:72. First, anhydrous methanol and deionized water are prepared into an alcohol-water solution, and formic acid is added to adjust the pH to 4.5-5.5, and the coupling agent KH560 is added under stirring, and the silanol solution is obtained after...

Embodiment 2

[0049] The difference from Example 1 is:

[0050] 1. Material preparation: A32 steel sheet, using conventional grinding, sandblasting, polishing, and SiC sandpaper grinding to 600#.

[0051] 2. Degreasing: NaOH 100g / L, NaOH 2 CO 3 60g / L, Na 3 PO 4 12H 2 O 15g / L, Na 2 SiO 3 15g / L, the balance is water, the temperature is 80-90°C, the time is to remove the oil, after degreasing, the test piece is rinsed with natural water, and then rinsed with deionized water.

[0052] 3. Soak in silane solution: The silane solution is prepared by coupling agent KH560, deionized water and anhydrous methanol in a weight ratio of 5:10:85. First, anhydrous methanol and deionized water are prepared into an alcohol-water solution, and formic acid is added to adjust the pH to 4.5-5.5, and the coupling agent KH560 is added under stirring, and the silanol solution is obtained after hydrolysis for 1 hour. Immerse the test piece in the silanol solution for 0.5-2 minutes, take it out, and let it ...

Embodiment 3

[0057] The difference from Example 1 is:

[0058] 1. Material preparation: Q235q steel sheet, using conventional grinding, sandblasting, polishing, and SiC sandpaper grinding to 600#.

[0059] 2. Degreasing: NaOH 60g / L, NaOH 2 CO 3 20g / L, Na 3 PO 4 12H 2 O 20g / L, Na 2 SiO 3 5g / L, the balance is water, the temperature is 80-90°C, and the time is to remove the oil. After degreasing, the test piece is rinsed with natural water, and then rinsed with deionized water.

[0060] 3. Soak in silane solution: The silane solution is prepared by coupling agent KH550, deionized water and absolute ethanol in a weight ratio of 2:5:93. First, prepare an alcohol-water solution with absolute ethanol and deionized water, add acetic acid to adjust the pH to 3.5-5.0, add coupling agent KH550 under stirring, and hydrolyze for 2 hours to form a silanol solution. Immerse the test piece in the silanol solution for 0.5-2 minutes, take it out, and let it dry naturally.

[0061] 4. Drying: Dry th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a silanization treatment method before coating of a steel piece, in particular to a pretreatment method which is cheap, simple in operation, environmentally-friendly and pollution-free and effectively improves the bonding strength of the steel piece and a subsequent organic coating. The method solves the bonding problem of the steel piece and the coating in the prior art. The method comprises the following steps of: performing pretreatment such as surface grinding, polishing, degreasing and the like on the steel piece; and then performing silanization treatment on the degreased workpiece, wherein a silane film obtained on the surface of the workpiece has functional group components such as epoxy group, amino group and the like matched with the coating. By the method, chemical bonding of the subsequent coating and the steel piece is realized by silanization treatment, the bonding force of the coating is improved, no slag is produced in the treatment process, treatment time is short, and the method is simple and convenient to control; and the treatment step is few, surface conditioning and passivation processes can be saved, and bath solution is long in service life and simple in maintenance.

Description

Technical field: [0001] The invention relates to a silanization treatment method for steel parts before coating, in particular to a pretreatment method that is cheap, simple to operate, environmentally friendly and pollution-free, and can effectively improve the bonding strength of steel parts and subsequent organic coatings. Background technique: [0002] Steel structures and components are widely used in various fields of the national economy, and the corrosion of steel will bring huge economic losses. Organic coatings / paints are the most commonly used steel anti-corrosion technology. In the long-term use process, the protective performance of organic coatings depends on the corrosion resistance of the coating itself on the one hand, and on the relationship between the coating and steel parts on the other hand. Interface bonding performance to prevent peeling and bubbling of the coating. [0003] In order to improve the bonding strength between steel parts and (epoxy) coa...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C23G1/19C23C22/05
Inventor 严川伟张吉阜王福会
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com