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Anti-corrosion composite coating for rail fastener clips and bolt spikes, preparation method and coating method thereof

A composite coating and anti-corrosion technology, which is applied in the direction of anti-corrosion coatings, coatings, and devices for coating liquid on the surface, and can solve the problems of low bonding force between anti-corrosion grease and rail substrate, low coating efficiency, and poor coating quality , to achieve the effect of reducing the coating workload and labor intensity, good anti-corrosion effect, and saving labor costs

Active Publication Date: 2022-06-17
ZHEJIANG BAOSHENG RAILWAYNEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing anti-corrosion grease has a low bonding force with the rail matrix, is easy to fall off, has a short service life, and requires frequent maintenance; and after the grease is exposed to the sun and rain outdoors, it is very easy to secrete base oil, adhere to dust, sewage, etc. cause environmental pollution
In addition, the rails need to be manually painted with a brush every few months, the coating cost is relatively high, the coating quality is poor and the coating efficiency is low

Method used

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  • Anti-corrosion composite coating for rail fastener clips and bolt spikes, preparation method and coating method thereof
  • Anti-corrosion composite coating for rail fastener clips and bolt spikes, preparation method and coating method thereof
  • Anti-corrosion composite coating for rail fastener clips and bolt spikes, preparation method and coating method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) Configure modified fumed silica:

[0054] In a 500ml three-necked flask, add 300ml of xylene, 14g of gas phase white carbon black, 0.56g of water, stir at room temperature for 1 hour, add 2.52g of hexamethyldisilazane, heat and stir, and control the temperature at 110 to 130 degrees to react. After 2 h, the temperature was lowered, the xylene was evaporated under reduced pressure, the product was poured out, dried and used for later use.

[0055] (2) Configure the primer:

[0056] Heat and mix 30g of α,ω-dihydroxy polydimethylsiloxane with a viscosity (25°C) of 8000cs and a hydroxyl content of 0.004mol / 100g and 5g of silicone oil 201, keep at 160±10°C for 1.5 hours, add 2g of modified resin EVA, stirred for half an hour, then added 1g of barium petroleum sulfonate, stirred for half an hour, then cooled to 50°C, added 0.5g of vinyltributanone oximinosilane, mixed for 15min, and added 0.5g of methyl triacetate. Butanone oxime silane, plus 0.05 g of dibutyltin dilaur...

Embodiment 2

[0063] Step (1) is the same as Example 1

[0064] (2) Configure the primer:

[0065] Heat and mix 40g of α,ω-dihydroxy polydimethylsiloxane with a viscosity (25°C) of 8000cs and a hydroxyl content of 0.004mol / 100g and 10g of silicone oil 201, keep at 160±10°C for 1.5 hours, add 5g of modified resin EVA, stirred for half an hour, then added 2g of barium petroleum sulfonate, stirred for half an hour, then cooled to 50°C, added 1g of vinyltributanone oximosilane, mixed for 15min, and added 2g of methyltributanone The oxime silane was added with 0.1 g of dibutyltin dilaurate, mixed uniformly, stirred for half an hour, decompressed for about 5 minutes, and removed air bubbles to obtain a primer modified silicone rubber.

[0066] (3) Configure the surface coating:

[0067] Pass N in the reactor for 30min 2 , add 13g acrylic resin, 70g n-butanol, 1g silicone defoamer, turn on the reflux device, stir and heat up to 70±10°C, add 13g acrylic resin, 1g benzoyl peroxide, 7g vinyltrimet...

Embodiment 3

[0070] Step (1) is the same as Example 1

[0071] (2) Configure the primer:

[0072] Heat and mix 50g of α,ω-dihydroxy polydimethylsiloxane with a viscosity (25°C) of 8000cs and a hydroxyl content of 0.004mol / 100g and 15g of silicone oil 201, keep at 160±10°C for 1.5 hours, add 7g of modified resin EVA, stirred for half an hour, then added 5g of barium petroleum sulfonate, stirred for half an hour, then cooled to 50°C, added 1g of vinyltributanone oximosilane, mixed for 15min, and added 3g of methyltributanone The oxime silane was added with 0.2 g of dibutyltin dilaurate, mixed uniformly, stirred for half an hour, and decompressed for about 5 minutes to remove air bubbles to obtain a primer modified silicone rubber.

[0073] (3) Configure the surface coating:

[0074] Pass N in the reactor for 30min 2 , add 15g acrylic resin, 80g n-butanol, 1g silicone defoamer, turn on the reflux device, stir and heat up to 70±10℃, add 15g acrylic resin, 1g benzoyl peroxide, 8g vinyltrimet...

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Abstract

The invention discloses an anti-corrosion composite coating for rail fastener clips and bolt spikes and a preparation method and a coating method thereof. The composite coating includes a bottom layer and a surface layer, the bottom layer is modified silicone rubber, and the surface layer is modified fluorosilicon rubber. permanent acrylic resin. The preparation method is as follows: (1) Configure the primer: heat and mix the base rubber, plasticizer and filler, add modified resin and antirust agent to stir, then lower the temperature, add crosslinking agent and catalyst in sequence, and obtain modified silicone rubber ; (2) Configure the surface coating: fluorine-silicon modified acrylic resin is that the acrylic resin is first modified by silicon and then modified by fluorine. The coating method is rust coating. The coating adopts two layers of materials and methods. The bottom layer achieves anti-corrosion performance and improves the adhesion to the surface of the rail; the surface layer realizes the hydrophobic self-cleaning and anti-ultraviolet properties of the coating surface; Layer migration performance, can be firmly attached to the track surface, good anti-corrosion effect; simple coating process, reducing coating workload.

Description

technical field [0001] The invention belongs to the field of anti-corrosion, and in particular relates to an anti-corrosion composite coating used for rail fastener elastic strips and bolt spikes, a preparation method and a coating method thereof. Background technique [0002] The rail waist and fasteners work in harsh environments and are eroded by various corrosive factors, which are extremely prone to damage and destruction. And once the rail network is corroded, the damage spreads quickly, and the rail network will suffer irreversible damage. According to the survey, the standard for the use of rail network materials is 10 years, but due to corrosion, the service life is reduced by half. Especially with the rapid development of my country's high-speed railways, more and more steel rails are being laid, and the daily average corrosion amount is amazing, and the corrosion problem of steel rails is becoming more and more serious. For steel bridge railway anti-corrosion, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/04C09D5/08C09D7/62C09D7/63C09D4/06C09D4/02B05D7/14B05D7/24B05D7/00
CPCC09D183/04C09D5/08C09D7/62C09D7/70C09D7/63C09D4/06B05D7/14B05D7/24B05D7/54B05D2202/10B05D2518/10B05D2502/005C08L23/0853C08K9/06C08K7/26C08K5/5465
Inventor 胡萍黄樟华李国苗李林峰陈国防黄坤许乐
Owner ZHEJIANG BAOSHENG RAILWAYNEW MATERIALS TECH
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