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Marine anticorrosive coating

A marine anti-corrosion and coating technology, applied in anti-corrosion coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problems of reducing the service life and safe use of submarine steel pipes, cannot prevent the immersion of small molecular corrosive media, and needs to be improved. Achieve excellent anti-rust performance, high strength and improved compactness

Inactive Publication Date: 2014-10-08
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The anti-corrosion effect of the water-based anti-corrosion coatings on the market still needs to be improved, because the coating will have some holes and defects inside the coating, which cannot prevent the intrusion of small molecule corrosive media, and cannot completely prevent corrosion. The physical shielding performance of the coating is still to be determined In addition, traditional anti-corrosion coatings still have many deficiencies in seawater chemical corrosion and electrochemical corrosion resistance, which will greatly reduce the service life and safety of submarine steel pipes, fill the holes and defects of the coating, and improve the coating and metal coating. Adhesion, enhancing the electrochemical corrosion and chemical corrosion resistance of the coating is the focus of anti-corrosion coating research
At present, there is a lack of a high anti-corrosion marine anti-corrosion coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of marine anticorrosion paint 30g of the present invention, marine anticorrosion paint is made up of following components by mass percentage:

[0033]

[0034] Wherein the film-forming substance is composed of 20% (6g) of water-based novolac epoxy resin and 14% (4.2g) of water-based polyurethane by mass percentage; the pigment and filler include graphene; and the solvent is deionized water.

[0035] The pigments and fillers are composed of the following components by mass percentage:

[0036]

[0037] The auxiliary agent is composed of dispersant 0.8% (0.24g), defoamer 0.7% (0.21g), coupling agent 1.2% (0.36g), cosolvent 3% (0.9g), thickener 0.3% by mass percent % (0.09g) and curing agent 0.4% (0.12g).

[0038] The dispersant is a combination of one or more of sodium tripolyphosphate, sodium tetrapolyphosphate, sodium hexametaphosphate, ammonium polymethacrylate; the defoamer is a GPE type defoamer, polyether modified At least one of the permanent silicon...

Embodiment 2

[0057] A kind of marine anticorrosion coating 50g of the present invention, marine anticorrosion coating is made up of following components by mass percentage:

[0058]

[0059]

[0060] Wherein the film-forming substance is composed of 18% (9g) of water-based novolac epoxy resin and 15% (7.5g) of water-based polyurethane according to the mass percentage; the solvent is deionized water.

[0061] The pigments and fillers are composed of the following components by mass percentage:

[0062]

[0063] The auxiliary agent is composed of dispersant 0.8% (0.4g), defoamer 0.7% (0.35g), coupling agent 3% (1.5g), cosolvent 3% (1.5g), thickener 0.4% by mass percent % (0.2g) and curing agent 0.5% (0.25g).

[0064] The method for preparing above-mentioned marine anticorrosion paint, this comprises the following steps:

[0065] (1) Put the dispersant, 1 / 2 of the defoamer, talcum powder, iron oxide red, titanium dioxide, mica powder, bentonite, zinc phosphate and quartz powder int...

Embodiment 3

[0076] A kind of marine anticorrosion paint 100g of the present invention, marine anticorrosion paint is made up of following components by mass percentage:

[0077]

[0078] Wherein the film-forming substance is composed of 17% (17g) of water-based novolak epoxy resin and 14% (14g) of water-based polyurethane according to the mass percentage; the solvent is deionized water.

[0079] The pigments and fillers are composed of the following components by mass percentage:

[0080]

[0081] Described auxiliary agent is by mass percent by dispersant 1.2% (1.2g), defoamer 1% (1g), coupling agent 5% (5g), cosolvent 4% (4g), thickener 0.5% (0.5 g) and curing agent 0.6% (0.6g).

[0082] The method for preparing above-mentioned marine anticorrosion coating, comprises the following steps:

[0083] (1) Put the dispersant, 1 / 2 of the defoamer, talcum powder, iron oxide red, titanium dioxide, mica powder, bentonite, zinc phosphate and quartz powder into the sand mill according to the...

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Abstract

The invention discloses a marine anticorrosive coating. The marine anticorrosive coating consists of the following components in percentage by mass: 30-40 percent of film forming matter, 21.5-33.8 percent of pigment filler, 6.2-15.4 percent of aids and 30-42.3 percent of solvent, wherein the film forming matter consists of 16-23 mass percent of water-based phenolic epoxy resin and 14-16 mass percent of waterborne polyurethane; the pigment filler comprises graphene; the solvent is deionized water. The marine anticorrosive coating has high corrosion resistance, high flexibility, high wear resistance, high oil and aging resistance and good antirust performance. The film forming matter integrates high adhesion force, high strength, low shrinkage rate and high corrosion resistance of the water-based phenolic epoxy resin as well as high flexibility, wear resistance, oil and aging resistance and good film-forming performance of the waterborne polyurethane.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a marine anti-corrosion coating. Background technique [0002] With the continuous exploitation of onshore oil and natural gas resources, it is no longer able to fully meet the needs of human beings, and there are abundant oil and natural gas resources stored in the ocean. The competition for offshore oil and gas has become the focus of attention of all countries in today's society. Development usually uses large ships and pipelines for transportation, and submarine pipeline transportation has the outstanding advantages of high safety performance and low cost, and has been adopted by most countries in the world. my country started relatively late in offshore oil and gas exploration, development and oil and gas transportation. Domestic submarine oil and gas pipelines have a large gap with foreign products in terms of mechanical properties, corrosion resistance and service life. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/04C09D175/04C09D5/08C09D7/12
Inventor 姚正军李琳周金堂李天明刘沛江
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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