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Preparation method of surface-coated bar with chloridion erosion resistance

A technology of ionic corrosion and surface coating, which is applied to devices, coatings, special surfaces and other directions for coating liquids on the surface, which can solve the problems of poor adhesion between the coating and the substrate, poor impermeability of the coating, loss of substrate protection, etc. , to achieve the effect of being conducive to industrialization, excellent corrosion resistance, and good compatibility

Inactive Publication Date: 2012-12-26
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the classic corrosion failure mechanism of the coating film, there are usually three forms of corrosion failure of the coating film in the corrosive medium: one is that the adhesion between the coating and the substrate is poor, and it falls off; the other is that the coating itself is exposed to acid, alkali, salt and other media The erosion of the substrate has lost the protection of the substrate; the third is that the coating has defects (such as pinholes) or the coating has poor impermeability, such as Na + , Cl - Plasma can be diffused, which greatly reduces the resistance of the coating and causes localized corrosion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Take 40g of polymethylphenyl silicone, 20g of epoxy resin, and 20g of phenolic resin, mix them into a three-necked bottle, which is equipped with a stirrer, a thermometer, a reflux condenser and an oil-water separator, and then add 20g of organic The solution xylene is heated to about 150°, and the reacted small molecules (such as ethanol) and water are separated through the oil-water separator. After reacting for 3 to 4 hours, cool down and stop heating, and the solution will form a gel after cooling.

[0022] (2) Add 4 g of nano-silicon aluminum oxynitride into the glue solution, and place them together in a vacuum internal mixer for high-speed dispersion for 30 minutes.

[0023] (3) After high-speed dispersion, deoxidize and degas, and finally filter to obtain a slurry that is a high-efficiency surface coating for anti-chloride ion corrosion.

Embodiment 2

[0025] (1) Take 30g of polymethylphenyl silicone, 30g of epoxy resin, and 20g of phenolic resin, mix them into a three-necked bottle, which is equipped with a stirrer, a thermometer, a reflux condenser and an oil-water separator, and then add 20g of organic The solution xylene is heated to about 150°, and the reacted small molecules (such as ethanol) and water are separated through the oil-water separator. After reacting for 3 to 4 hours, cool down and stop heating, and the solution will form a gel after cooling.

[0026] (2) Add 5 g of nano-silicon aluminum oxynitride into the glue solution, and place them together in a vacuum internal mixer for high-speed dispersion for 50 minutes.

[0027] (3) After high-speed dispersion, deoxidize and degas, and finally filter to obtain a slurry that is a high-efficiency surface coating for anti-chloride ion corrosion.

[0028] Embodiment 1 and embodiment 2 list of ingredients are as follows:

[0029] Example

Silicone / g

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Abstract

The invention relates to a preparation method of a surface-coated bar with chloridion erosion resistance, comprising the following steps of: (1) mixing prepolymers of epoxy resin, phenolic resin and organic silicon resin according to the mass ratio of (1-2) :(1-2):1, and adding dimethylbenzene and dissolving to form a glue solution, wherein the mass ratio of the dimethylbenzene to the phenolic resin of 1: 1; (2) adding nanometer silicon oxynitride aluminum powder to the glue solution to disperse for 30-50 minutes, wherein the mass of the nanometer silicon oxynitride aluminum powder accounts for 4-5 percent of the mass of the glue solution; and (3) curing the glue solution by using polyamides, and spraying the cured glue solution to the surface of the bar so as to obtain the surface-coated bar with the chloridion erosion resistance. The invention has a simple process and low cost, is beneficial to industrialization and has good application prospect; and the chloridion erosion resistance of the bar is remarkably enhanced through prepared surface coating.

Description

technical field [0001] The invention belongs to the field of bar surface coatings, in particular to a preparation method of a chloride ion corrosion-resistant bar with a surface coating. Background technique [0002] There are highly permeable and corrosive chloride ions in the marine environment and seawater. At present, the commonly used marine engineering protection method is to apply marine coatings that resist seawater corrosion. The two basic series of marine coatings are marine anti-fouling coatings and marine anti-corrosion coatings. According to the use environment of different facilities, it can be divided into marine coatings, heavy-duty anti-corrosion coatings for marine engineering facilities, etc. Ship coatings are divided into ship bottom anticorrosion and antifouling coatings, hull coatings, deck coatings, interior cabin coatings and various special functional coatings according to the parts used. Marine anti-corrosion coatings include a wide range and belo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D7/24C09D163/00C09D161/06C09D183/00C09D7/12C09D5/08B05D5/00B05D7/14
Inventor 钟庆东肖轶刘卫东罗检朱龙彪
Owner SHANGHAI UNIV