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Aqueous zinc-rich flake cathode protection prime coat, preparation method and uses thereof

A cathodic protection, zinc-rich technology, used in coatings, anti-corrosion coatings, epoxy resin coatings, etc., can solve the problems of not being able to be used as a primer for static-conducting anti-corrosion coatings, unable to operate continuously, and fast settling speed. Produces precipitation, saves manpower and material resources, and enhances salt spray resistance

Inactive Publication Date: 2015-11-04
镇江德昇新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the disadvantages of existing zinc-rich primers are: (1) high zinc powder content (65-70% of the total mass), easy to precipitate, and need to be constantly stirred during the coating process
(2) Due to its fast settlement speed, pipes are often blocked and blocked in airless mechanical spraying, and continuous operation is impossible, making construction difficult
Moreover, although it can shield the intrusion of corrosive media and enhance the anti-corrosion effect, it cannot be used as a primer for static-conductive anti-corrosion coatings.

Method used

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  • Aqueous zinc-rich flake cathode protection prime coat, preparation method and uses thereof
  • Aqueous zinc-rich flake cathode protection prime coat, preparation method and uses thereof
  • Aqueous zinc-rich flake cathode protection prime coat, preparation method and uses thereof

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Embodiment 1

[0027] This embodiment provides a water-based zinc-rich flake cathodic protection primer, which is composed of three components: A component, B component and C component, wherein the mass ratio of A component to B component is 5:1 , the mass ratio of the sum of the mass of components A and B to the mass of component C is 5:1.

[0028] In terms of mass fraction, component A includes: 60% water-based epoxy resin, 5% additives and 35% deionized water; component B includes: 80% modified amine curing agent, 15% propylene glycol butyl Ether and 5% deionized water; component C is flaky zinc powder, and two zinc powders with different particle sizes (600 mesh and 1500 mesh) are used in combination, 600 mesh accounts for 60%, and 1500 mesh accounts for 40%.

[0029] The water-based epoxy resin is used in combination with a water-based epoxy resin with a solid content of 50% and a water-based epoxy resin with a solid content of 55%.

[0030] Auxiliaries are dispersants, wetting agents,...

Embodiment 2

[0041]This embodiment provides a water-based zinc-rich flake cathodic protection primer, which is composed of three components: A component, B component and C component, wherein the mass ratio of A component to B component is 8:1 , the mass ratio of the sum of the mass of components A and B to the mass of component C is 5:1.

[0042] In terms of mass fraction, component A includes: 45% water-based epoxy resin, 6% additives and 49% deionized water; component B includes: 70% modified amine curing agent, 15% propylene glycol butyl Ether and 15% deionized water; component C is flaky zinc powder, which is used in combination with zinc powders of three different particle sizes (800 mesh, 1000 mesh and 1200 mesh), 800 mesh accounts for 40%, and 1000 mesh accounts for 30%. %, 1200 purposes accounted for 30%.

[0043] The selected solid content of waterborne epoxy resin is 50%.

[0044] Auxiliaries are dispersants, wetting agents, anti-flash corrosion agents, stabilizers, defoamers a...

Embodiment 3

[0052] This embodiment provides a water-based zinc-rich flake cathodic protection primer, which is composed of three components: component A, component B and component C, wherein the mass ratio of component A to component B is 6:1 , the mass ratio of the sum of the mass of components A and B to the mass of component C is 5:1.

[0053] In terms of mass fraction, component A includes: 52% water-based epoxy resin, 4% additives and 44% deionized water; component B includes: 75% modified amine curing agent, 12% propylene glycol butyl Ether and 13% deionized water; component C is flake zinc powder, which is used in combination with zinc powders of three different particle sizes (700 mesh, 1400 mesh, 900 mesh and 1300 mesh), 700 mesh accounts for 30%, 1400 mesh The purpose accounts for 30%, the 900 purpose accounts for 20%, and the 1300 purpose accounts for 20%.

[0054] The solid content of the waterborne epoxy resin is 52%.

[0055] Auxiliaries are dispersants, wetting agents, an...

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Abstract

The present invention discloses an aqueous zinc-rich flake cathode protection prime coat, and belongs to the technical field of heavy anti-corrosion coating materials. The aqueous zinc-rich flake cathode protection prime coat comprises a component A, a component B and a component C, wherein a mass ratio of the component A to the component B is 5:1-8:1, a mass ratio of the mass sum of the component A and the component B to the component C is 5:1, the component A comprises, by mass, 45-60% of an aqueous epoxy resin, 4-6% of an auxiliary agent, and 35-50% of deionized water, the component B comprises, by mass, 70-80% of a modified amine curing agent, 10-15% of propylene glycol butyl ether, and 5-15% of deionized water, and the component C is flaky zinc powder. According to the present invention, the salt spray resistance of the aqueous zinc-rich flake cathode protection prime coat is similar to the salt spray resistance of the aqueous zinc-rich prime coat, and the aqueous zinc-rich flake cathode protection prime coat has unique advantages in the fields of construction convenience and static electricity conducting, and further has characteristics of environmental protection, safety, and no toxicity.

Description

technical field [0001] The invention belongs to the technical field of heavy-duty anti-corrosion coatings, in particular to a water-based zinc-rich flake cathodic protection primer and a preparation method thereof. Background technique [0002] Primers that contain a large amount of zinc dust are called zinc-rich primers. Because zinc is more active than iron, it is easy to lose electrons. The zinc powder in the coating film and the steel substrate form a primary battery. Zinc is the anode and iron is the cathode. The current moves from zinc (anode) to iron (cathode). Zinc powder makes anodic sacrifice to cathodically protect the steel substrate. [0003] Under the general trend of protecting ecology, saving energy and reducing emissions, and developing environment-friendly coatings, the water-based inorganic zinc-rich primer with inorganic silicate as the film-forming substance has become a powerful product in the field of heavy-duty anti-corrosion. Compared with primers ...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D7/12C09D5/10
Inventor 李洪岩
Owner 镇江德昇新材料科技有限公司
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