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Anti-acid smelting combined epoxy modified powder paint

An epoxy modified, powder coating technology, applied in the field of coatings, can solve the problems of metal matrix adhesion, poor penetration resistance and erosion resistance, corrosion resistance not meeting requirements, harsh acid corrosion environment, etc., and achieves high mechanical strength, The effect of improved impact strength and strong penetration resistance

Inactive Publication Date: 2004-07-14
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, many industries, such as chemical industry, chemical fiber, energy, electric power, metallurgy, nuclear power and military industry, etc. have harsh acid etching environment for water treatment pipelines and equipment, and domestic general anti-corrosion coatings can not meet the requirements of the above industries, such as traditional rubber lining technology The corrosion resistance does not meet the requirements, and it is easy to age in a corrosive environment; although polyolefin coatings have good corrosion resistance, they have poor adhesion to the metal substrate, penetration resistance, and erosion resistance; although the plastic lining is chemically stable Good performance, but poor binding force with the matrix, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The formula of acid-resistant fusion bonded epoxy modified powder coating is: E12 epoxy resin 50%, curing agent dicyandiamide + ether 3%, modifier thermosetting phenolic resin 2% and filler high-purity SiO 2 margin.

[0018] The properties of the acid-resistant fusion bonded epoxy modified powder coating are as follows:

[0019] Bonding force between coating and substrate: 80MPa,

[0020] The mechanical strength of the coating itself: 18J,

[0021] Penetration resistance of the coating: 3.2%,

[0022] Coating resistant to 36.5% HCl or 25% H 2 SO 4 solution erosion.

Embodiment 2

[0024] The formula of acid-resistant fusion bonded epoxy modified powder coating is: E12 epoxy resin 60%, curing agent dicyandiamide + ether 5%, modifier thermosetting phenolic resin 3% and filler high-purity SiO 2 margin.

[0025] The properties of the acid-resistant fusion bonded epoxy modified powder coating are as follows:

[0026] Bonding force between coating and substrate: 85MPa,

[0027] The mechanical strength of the coating itself: 18J,

[0028] Penetration resistance of the coating: 3.0%,

[0029] Coating resistant to 36.5% HCl or 25% H 2 SO 4 solution erosion.

[0030] The measured resistance to cathodic disbondment is between 1.5-4mm, which is far less than the 8mm standard used for heavy corrosion protection in foreign countries. At the same time, this coating has a certain micro-water permeability, which ensures that the coating has a micro-current passing through during cathodic protection. Therefore, there will be no cathode shielding (CP) phenomenon.

Embodiment 3

[0032] The formula of acid-resistant fusion bonded epoxy modified powder coating is: E12 epoxy resin 70%, curing agent dicyandiamide + ether 5%, modifier thermosetting phenolic resin 4% and filler high-purity SiO 2 margin.

[0033] The properties of the acid-resistant fusion bonded epoxy modified powder coating are as follows:

[0034] The bonding force between the coating and the substrate is 80MPa,

[0035] The mechanical strength of the coating itself is 18J,

[0036] The penetration resistance of the coating is 3.0%,

[0037] Coating resistant to 36.5% HCl or 25% H 2 SO 4 solution erosion.

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PUM

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Abstract

The acid-proof modified powder paint consists of E12 epoxy resin 50-70 wt%, curing agent cyanoguanidine plus ester azole 3-6 wt%, modifier of thermosetting phenolic resin 1-5 wt% and stuffing of high purity SiO2 accounting for the rest amount. The paint coating of the present invention can resist corrosion of HCl in 36.5 % concentration.

Description

Technical field: [0001] The invention relates to a paint, a powder paint containing epoxy resin. Background technique: [0002] Usually to solve the problem of heavy corrosion protection, there are mainly the following methods: optimal design of material structure, redevelopment of materials, surface modification of materials, cathodic protection and organic coatings, etc. [0003] Organic coating protection technology is a widely used metal anti-corrosion method. It is economical, fast, labor-saving and convenient, and has become one of the most economical methods to control material corrosion. At present, many industries, such as chemical industry, chemical fiber, energy, electric power, metallurgy, nuclear power and military industry, etc. have harsh acid etching environment for water treatment pipelines and equipment, and domestic general anti-corrosion coatings can not meet the requirements of the above industries, such as traditional rubber lining technology The corro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00
Inventor 李京陆卫忠史杰智高英李晓东
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI