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Anti-corrosion antifouling coating and preparing method thereof

A corrosion-resistant and anti-fouling technology, which is applied in the field of corrosion-resistant and anti-fouling coatings and its preparation, can solve problems such as accelerated corrosion, and achieve the effects of low cost, good safety, and simple operation

Active Publication Date: 2018-09-28
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Biofouling tends to accelerate the occurrence of corrosion

Method used

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  • Anti-corrosion antifouling coating and preparing method thereof
  • Anti-corrosion antifouling coating and preparing method thereof
  • Anti-corrosion antifouling coating and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Preparation of inorganic anti-corrosion and anti-fouling raw materials:

[0044] Select 30wt% aluminum dihydrogen phosphate aqueous solution (60g) as binding agent, chromium oxide (13g) is passivator, aluminum powder (particle size is 2 μm, 100g) is corrosion-resistant functional filler and P25 powder (particle size 25nm, 80g ) is a photocatalytic functional filler, which is added into 50ml of deionized water, and stirred at a high speed for 0.5h (rotating speed 1000r / min), so that the components of the raw materials are evenly dispersed and compounded.

[0045] (2) Substrate pretreatment: Degrease and derust the surface of the low carbon steel of the substrate material, and perform sandblasting on the surface.

[0046] (3) Coating preparation: A layer of 100 μm inorganic corrosion-resistant and anti-fouling coating was prepared on the surface of the pretreated substrate by means of aerosol spraying, and cured by heating. Among them, the aerosol spraying parameters...

Embodiment 2

[0074] (1) Preparation of inorganic anti-corrosion and anti-fouling raw materials:

[0075] Select 30wt% aluminum dihydrogen phosphate aqueous solution (60g) as binding agent, sodium silicate (20g) is passivating agent, aluminum powder (particle size is 2 μm, 80g) is corrosion-resistant functional filler, P25 powder (particle size 25nm, 120g) is a photocatalytic functional filler, which is added to 50ml of deionized water, and stirred at a high speed for 1h (rotating speed 1000r / min), so that the components of the raw materials are evenly dispersed and compounded.

[0076] (2) Substrate pretreatment: Degrease and derust the surface of the substrate material, and perform sandblasting on the surface.

[0077] (3) Coating preparation: A layer of 200 μm inorganic corrosion-resistant and anti-fouling coating was prepared on the surface of the pretreated substrate by means of aerosol spraying, and cured by heating. Among them, the aerosol spraying parameters are air pressure of 0.8...

Embodiment 3

[0088] (1) Preparation of inorganic anti-corrosion and anti-fouling raw materials:

[0089] Choose 30wt% aluminum dihydrogen phosphate aqueous solution (55g) as binder, sodium silicate (15g) as passivator, zinc powder (particle size is 2μm, 100g) as corrosion-resistant functional filler, Ag-doped anatase phase TiO 2 The powder (particle size 5-10nm, 80g) is a photocatalytic functional filler, added to 50ml of deionized water, and stirred at a high speed for 1.5h (rotating speed 800r / min), so that the components of the raw materials are evenly dispersed and compounded.

[0090] (2) Substrate pretreatment: Degrease and derust the surface of the substrate material, and perform sandblasting on the surface.

[0091] (3) Coating preparation: use a brushing roller to paint, prepare an inorganic corrosion-resistant and anti-fouling coating with a thickness of 60 μm on the surface of the pretreated substrate, and heat and cure. Among them, the single coating thickness of the brushing...

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Abstract

The invention discloses an anti-corrosion antifouling coating and a preparing method thereof. The anti-corrosion antifouling coating is prepared from, by weight, 10%-30% of binding agent, 1%-10% of passivating agent, 20%-50% of anti-corrosion functional filler and 20-50% of photocatalysis functional filler; the binding agent is selected from an aluminum dihydrogen phosphate water solution; the passivating agent is selected from at least one of chromic oxide, sodium tungstate and sodium silicate; the anti-corrosion functional filler is selected from aluminum powder and / or zinc powder; the photocatalysis functional filler is selected from metal-doped nanometer titania or pure nanometer titania. All the raw materials and water are mixed, coating, heating and solidifying are carried out, and the anti-corrosion antifouling coating is prepared. According to the anti-corrosion antifouling coating, under the condition that the anti-corrosion performance of the coating is not damaged, the goodantifouling function of the coating is given, and the application field of the anti-corrosion antifouling coating is further expanded.

Description

technical field [0001] The invention relates to the technical field of functional coating protection, in particular to a corrosion-resistant and anti-fouling coating and a preparation method thereof. Background technique [0002] The marine environment is one of the harshest environments for metal corrosion under natural conditions. Seawater is a strong dielectric solution, coupled with the combined effects of multiple corrosive environments such as freeze-thaw, sea fog, typhoon, heavy rain, and industrial emissions, resulting in marine corrosion. Corrosion phenomenon. According to estimates, among the steel soaked in oceans in my country, 1.5 tons of steel are corroded every second. Therefore, there are many studies on corrosion-resistant coatings for marine engineering equipment. Marine engineering equipment is not only corroded by seawater, but also adhered by various marine organisms (such as shellfish, seaweed, seaweed, etc.) Oil and gas pipelines, submarine optical ...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D5/16C09D5/10C09D7/61
CPCC09D1/00C09D5/103C09D5/106C09D5/1618C09D5/1687
Inventor 黄晶龚永锋所新坤周平刘奕李华
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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