A kind of nanocomposite marine anticorrosion coating and preparation method thereof

Abstract

The invention discloses a nanometer composite ocean anticorrosion coating and a preparation method thereof, belonging to the field ofcorrosion prevention of coatings. The coating contains the following components in percentage by weight: a component A: 20%-40% of acrylic resin, 5%-10% of a hydroxyl epoxy phosphate dispersing agent, 4%-7% of a Fe3O4@TiO2-h-BN hybridized composite material, 0.5%-2%of nano-crystalline cellulose, 5%-15% of epoxy resin, 1.2%-3.5% of other aids, 20%-25% of deionized water, 5%-10% of zinc powder and 3%-7% of calcium carbonate; and a component B: a curing agent, namely 15%-25% of a water-based isocyanate curing agent. The coating prepared by virtue of the preparation method has good wear resistance, fouling resistance and corrosion resistance, is mainly applied to the fouling prevention and corrosion prevention of petroleum steel-frame structure platforms in an ocean atmospheric region environment and is also suitable for the fields of fouling prevention andcorrosion prevention of ships and underwater pipelines.

Description

technical field

[0001] The invention belongs to the field of metal anti-corrosion engineering, and specifically relates to a novel nano-material composite marine anti-corrosion coating and a preparation method thereof, which is mainly used in the anti-corrosion fields of metal pipelines, oil and gas exploration platforms, steel frame structures, etc. in marine atmospheric areas, and can also be applied In the anti-corrosion field of platform facilities such as ships and offshore wind power generation. Background technique

[0002] The ocean accounts for about 70% of the earth's surface area. In world trade, more than 90% of freight is transported by ocean. Marine resources and the shipping industry have become an indispensable pillar for the development of the world economy. However, with the reciprocating impact of sea waves, sea sand, etc. on metal components, and the corrosion of metal materials by seawater, marine organisms and their metabolites, the marine environment h...

Examples

preparation example Construction

[0060] Preparation of Hydroxy Epoxy Phosphate Dispersant (HEP):

[0061] A solution of bisphenol A epoxy resin E44 (20 g in 40 mL of acetone) was added dropwise to a solution of phosphoric acid (9.22 g of phosphoric acid in 20 mL of acetone, the molar ratio of phosphoric acid to epoxy group was 1:1) in 30 minutes vigorously After stirring for 30 minutes, the mixture was vigorously stirred until the acid value remained constant (97.23 mg KOH / g), after which N,N-dimethylethanolamine (11.27 g) and water were added dropwise to the mixture. After the reaction was completed, the solvent acetone was removed using a rotary vacuum evaporator to obtain a hydroxy epoxy phosphate dispersant.

Embodiment example 1

[0063] Add 32% water-based hydroxyl acrylic resin, 10% deionized water, pigments and fillers (calcium carbonate 4%, zinc powder 10%), other additives (defoamer 0.1%, adhesion promoter 0.2%, leveling 0.7% wetting and dispersing agent, 0.2% wetting and dispersing agent) high-speed stirring and mixing evenly, then add 7% water-based epoxy resin, and continue to stir for 30 minutes;

[0064] Step 2: Take 5% to implement case 1 to prepare Fe 3 o 4 @TiO 2 -h-BN hybrid composite material, 0.8% nano cellulose (NCC), 6% hydroxyl epoxy phosphate dispersant are mixed evenly, 10% deionized water is added to the mixed solution and ultrasonic dispersion is equipped with a cooling device at 500W Ultrasound in the instrument for 1h, get Fe 3 o 4 @TiO 2 -h-BN hybrid composite material mixed dispersion;

[0065] Step 3: Add the mixed dispersion obtained in Step 2 into the mixed solution obtained in Step 1 and continue ultrasonically dispersing evenly to obtain the A component of the nanoc...

Embodiment example 2

[0067] Add 25% water-based hydroxyl acrylic resin, 10% deionized water, pigments and fillers (calcium carbonate 3%, zinc powder 7%), other additives (defoamer 0.2%, adhesion promoter 0.2%, leveling 1%, wetting and dispersing agent 0.3%) high-speed stirring and mixing, then add 13% water-based epoxy resin, continue to stir for 30min;

[0068] Step 2: Take 4% Fe 3 o 4 @TiO 2 -h-BN hybrid composite material, 1.3% nano cellulose (NCC), 5% hydroxyl epoxy phosphate dispersant are mixed evenly, add 12% deionized water to the mixed solution and use a 500W ultrasonic disperser equipped with a cooling device Ultrasound for 1h, get Fe 3 o 4 @TiO 2 -h-BN hybrid composite material mixed dispersion;

[0069] Step 3: Add the mixed dispersion obtained in Step 2 into the mixed solution obtained in Step 1 and continue ultrasonically dispersing evenly to obtain Component A of the nanocomposite marine anti-corrosion coating, and finally add Component B, which is 18% water-based isocyanate c...

technical field

[0001] The invention belongs to the field of metal anti-corrosion engineering, and specifically relates to a novel nano-material composite marine anti-corrosion coating and a preparation method thereof, which is mainly used in the anti-corrosion fields of metal pipelines, oil and gas exploration platforms, steel frame structures, etc. in marine atmospheric areas, and can also be applied In the anti-corrosion field of platform facilities such as ships and offshore wind power generation. Background technique

[0002] The ocean accounts for about 70% of the earth's surface area. In world trade, more than 90% of freight is transported by ocean. Marine resources and the shipping industry have become an indispensable pillar for the development of the world economy. However, with the reciprocating impact of sea waves, sea sand, etc. on metal components, and the corrosion of metal materials by seawater, marine organisms and their metabolites, the marine environment h...

Examples

preparation example Construction

[0060] Preparation of Hydroxy Epoxy Phosphate Dispersant (HEP):

[0061] A solution of bisphenol A epoxy resin E44 (20 g in 40 mL of acetone) was added dropwise to a solution of phosphoric acid (9.22 g of phosphoric acid in 20 mL of acetone, the molar ratio of phosphoric acid to epoxy group was 1:1) in 30 minutes vigorously After stirring for 30 minutes, the mixture was vigorously stirred until the acid value remained constant (97.23 mg KOH / g), after which N,N-dimethylethanolamine (11.27 g) and water were added dropwise to the mixture. After the reaction was completed, the solvent acetone was removed using a rotary vacuum evaporator to obtain a hydroxy epoxy phosphate dispersant.

Embodiment example 1

[0063] Add 32% water-based hydroxyl acrylic resin, 10% deionized water, pigments and fillers (calcium carbonate 4%, zinc powder 10%), other additives (defoamer 0.1%, adhesion promoter 0.2%, leveling 0.7% wetting and dispersing agent, 0.2% wetting and dispersing agent) high-speed stirring and mixing evenly, then add 7% water-based epoxy resin, and continue to stir for 30 minutes;

[0064] Step 2: Take 5% to implement case 1 to prepare Fe 3 o 4 @TiO 2 -h-BN hybrid composite material, 0.8% nano cellulose (NCC), 6% hydroxyl epoxy phosphate dispersant are mixed evenly, 10% deionized water is added to the mixed solution and ultrasonic dispersion is equipped with a cooling device at 500W Ultrasound in the instrument for 1h, get Fe 3 o 4 @TiO 2 -h-BN hybrid composite material mixed dispersion;

[0065] Step 3: Add the mixed dispersion obtained in Step 2 into the mixed solution obtained in Step 1 and continue ultrasonically dispersing evenly to obtain the A component of the nanoc...

Embodiment example 2

[0067] Add 25% water-based hydroxyl acrylic resin, 10% deionized water, pigments and fillers (calcium carbonate 3%, zinc powder 7%), other additives (defoamer 0.2%, adhesion promoter 0.2%, leveling 1%, wetting and dispersing agent 0.3%) high-speed stirring and mixing, then add 13% water-based epoxy resin, continue to stir for 30min;

[0068] Step 2: Take 4% Fe 3 o 4 @TiO 2 -h-BN hybrid composite material, 1.3% nano cellulose (NCC), 5% hydroxyl epoxy phosphate dispersant are mixed evenly, add 12% deionized water to the mixed solution and use a 500W ultrasonic disperser equipped with a cooling device Ultrasound for 1h, get Fe 3 o 4 @TiO 2 -h-BN hybrid composite material mixed dispersion;

[0069] Step 3: Add the mixed dispersion obtained in Step 2 into the mixed solution obtained in Step 1 and continue ultrasonically dispersing evenly to obtain Component A of the nanocomposite marine anti-corrosion coating, and finally add Component B, which is 18% water-based isocyanate c...

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