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Anti sea water smelting combined epoxy modified powder paint

A fusion bonding and epoxy modification technology, used in the field of coatings, can solve the problems of unsatisfactory corrosion resistance, easy aging, and poor matrix adhesion, and achieve good chemical stability, strong penetration resistance, and mechanical strength. high effect

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

[0004] At present, the corrosive environment of the ocean is harsh, and the general anti-corrosion coatings in China cannot meet the above requirements. Good corrosion resistance, but poor bonding force, penetration resistance, and erosion resistance with the metal matrix; although the plastic lining has good chemical stability, the bonding force with the matrix is ​​poor, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The formula of seawater-resistant fusion-bonded epoxy modified powder coating: E12 epoxy resin 50%, curing agent dicyandiamide 3%, modifier ultrafine TiO 2 2% and filler CaCO 3 +BaSO 4 margin. The properties of this seawater-resistant fusion-bonded epoxy modified powder coating are as follows:

[0019] Coating and substrate bonding strength: 105MPa,

[0020] The mechanical strength of the coating itself: 19J,

[0021] The penetration resistance of the coating: 2.5%,

[0022] Coating resistance to NaCl or KCl erosion: saturated salt solution.

Embodiment 2

[0024] The formula of seawater-resistant fusion-bonded epoxy modified powder coating is: E12 epoxy resin 60%, curing agent dicyandiamide 5%, modifier ultrafine TiO 2 3% and filler CaCO 3 +BaSO 4 The performance of the seawater-resistant fusion-bonded epoxy modified powder coating is as follows:

[0025] Coating and substrate bonding strength: 110MPa,

[0026] The mechanical strength of the coating itself: 20J,

[0027] The penetration resistance of the coating: 2.3%,

[0028] Coating resistance to NaCl or KCl erosion: saturated salt solution.

[0029] The measured cathodic disbondment resistance is between 1.5-4mm, which is much smaller than the 8mm standard used for heavy corrosion protection abroad. At the same time, this coating has a certain degree of micro water permeability, which ensures that the coating has micro currents during cathodic protection. Therefore, there will be no cathode shielding (CP) phenomenon.

Embodiment 3

[0031] The formula of seawater resistant fusion bonded epoxy modified powder coating is E12 epoxy resin 70%, curing agent dicyandiamide 5%, modifier ultrafine TiO 2 4% and filler CaCO 3 +BaSO 4 margin.

[0032] The properties of this seawater-resistant fusion-bonded epoxy modified powder coating are as follows:

[0033] The bonding force between the coating and the substrate is 110MPa,

[0034] The mechanical strength of the coating itself is 19J,

[0035] The penetration resistance of the coating is 2.4%,

[0036] Coating resistance to NaCl or KCl erosion: saturated salt solution.

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Abstract

The sea water resisting modified powder paint consists of E12 epoxy resin 50-70 wt%, curing agent cyanoguanidine 3-6 wt%, modifier of superfine TiO2 powder 1-5 wt% and stuffing of CaCO3+BaSO4 accounting for the rest amount. The paint coating of the present invention can resist corrosion of saturated NaCl or KCl salt solution.

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: optimization design of material structure, redevelopment of material, surface modification of material, cathodic protection and organic coating. [0003] Organic coating protection technology is a widely used metal anti-corrosion method. It has the characteristics of economy, fast, labor-saving, and convenient, and has become one of the most economical methods for controlling material corrosion. [0004] At present, the marine corrosive environment is harsh, and the general domestic anti-corrosion coatings cannot meet the above requirements. For example, the traditional rubber lining technology does not meet the requirements for corrosion resistance and is prone to ageing in a corrosive environment; although polyolefin coatings have Good corrosion resistan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/03C09D163/00
Inventor 李京陆卫忠史杰智高英李晓东
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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