CN116179053A - Production method of corrosion-resistant aluminum alloy profile for ship - Google Patents

Production method of corrosion-resistant aluminum alloy profile for ship Download PDF

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Publication number
CN116179053A
CN116179053A CN202310279433.4A CN202310279433A CN116179053A CN 116179053 A CN116179053 A CN 116179053A CN 202310279433 A CN202310279433 A CN 202310279433A CN 116179053 A CN116179053 A CN 116179053A
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corrosion
aluminum alloy
alloy profile
parts
production method
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崔福锋
钱春晓
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Shandong Xuedi Aluminum Technology Co ltd
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Shandong Xuedi Aluminum Technology Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08—Anti-corrosive paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/16—Antifouling paints; Underwater paints
    • C09D5/1606—Antifouling paints; Underwater paints characterised by the anti-fouling agent
    • C09D5/1612—Non-macromolecular compounds
    • C09D5/1618—Non-macromolecular compounds inorganic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/221—Oxides; Hydroxides of metals of rare earth metal
    • C08K2003/2213—Oxides; Hydroxides of metals of rare earth metal of cerium

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Paints Or Removers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

The invention discloses a production method of a corrosion-resistant aluminum alloy profile for a ship, and relates to the technical field of corrosion prevention and pollution prevention of ships. The corrosion-resistant aluminum alloy profile is prepared by coating anticorrosive paint on the surface of the aluminum alloy profile; the anticorrosive paint comprises the following raw materials in parts by weight: 100 parts of epoxy resin base material, 2-6 parts of preservative auxiliary agent, 1-3 parts of defoamer, 0.2-0.6 part of flatting agent and 1-2 parts of dispersing agent. The anticorrosive paint prepared by the application has the advantages of good corrosion resistance, excellent toughness and strong adhesive force when being coated on the surface of the aluminum alloy profile.

Description

Production method of corrosion-resistant aluminum alloy profile for ship
Technical Field
The invention relates to the technical field of corrosion and pollution prevention of ships, in particular to a production method of a corrosion-resistant aluminum alloy profile for ships.
Background
Since 1891, the aluminum alloy material is applied to ships, and has been researched and developed for nearly hundred years, the aluminum alloy material is more and more widely applied to ships and becomes a material with development prospect in shipbuilding industry, and has the characteristics of low density and high strength, and the strength of the aluminum alloy material can be compared with high-quality steel and is easy to weld. Since seawater contains a large amount of inorganic salts and microorganisms, the seawater has a very strong corrosion effect on metal materials, which makes high demands on the performance of materials for manufacturing ships. The chemical properties of aluminium and aluminium alloy are very active, but because of the compact and passivated oxide film generated by the aluminium and oxygen, compared with steel materials, the aluminium and aluminium alloy has good corrosion resistance, not only can the performance of the ship body be improved, but also the maintenance period and cost of the ship body can be reduced.
When the aluminum alloy is applied to a ship, the aluminum alloy is more or less contacted with seawater or is affected by seawater spray and marine atmosphere, and is subjected to certain corrosion, wherein the corrosion of the aluminum alloy is a complex process, namely, the corrosion is affected by environment and is related to the properties of the alloy. The common corrosion types of marine aluminum alloys in marine environments are: pitting, crevice corrosion, intergranular corrosion, spalling corrosion, stress corrosion cracking, and the like. The corrosion protection of ship hulls generally adopts a method of paint and aluminum alloy sacrificial anode: firstly, for small high-speed ships, impressed current cathodic protection measures are not generally adopted, and the common material is that a sacrificial anode is arranged on an outer plate of a ship body; secondly, the corrosion environments of the bottom of the aluminum alloy ship and the parts above the water level are different, the bottom is mainly the penetration erosion effect of natural seawater and the attachment of aquatic organisms, and the parts above the water level are mainly the salt spray erosion effect and the atmospheric aging effect. The epoxy resin has the advantages of excellent alkali resistance, permeability resistance, strong adhesive force and the like, becomes one of the most widely cited resins in the anticorrosive paint, but has the defects of brittleness, easy aging, poor corrosion resistance and the like. In the prior art, inorganic nano particles are added to compound the epoxy resin with an organic coating, so that pores formed in the curing process of the coating are filled, the compactness of the organic anti-corrosion coating is improved, and the waterproof and anti-corrosion performances of the organic anti-corrosion coating are improved, however, the mechanical properties of the epoxy resin are changed along with the addition of the inorganic particles, the adhesive force and the permeation resistance of the epoxy resin on a substrate are affected, and the crevice corrosion of an aluminum alloy is accelerated.
Disclosure of Invention
The invention aims to provide a production method of a corrosion-resistant aluminum alloy section for ships, which solves the following technical problems:
the anti-corrosion paint prepared by using the existing epoxy resin as a base material is crisp in quality, easy to age and poor in corrosion resistance.
The aim of the invention can be achieved by the following technical scheme:
a method for producing corrosion-resistant aluminum alloy section for ships comprises the steps of coating anti-corrosion paint on the surface of the aluminum alloy section; the anticorrosive paint comprises the following raw materials in parts by weight: 100 parts of epoxy resin base material, 2-6 parts of preservative auxiliary agent, 1-3 parts of defoamer, 0.2-0.6 part of flatting agent and 1-2 parts of dispersing agent.
As a further aspect of the invention: the preparation method of the anti-corrosion auxiliary agent comprises the following steps:
s1: vinyl CeO 2 Adding concentrated sulfuric acid into the reaction bottle A, stirring uniformly, and adding NaNO 3 、KMnO 4 Stirring uniformly, heating to 30-40 ℃, preserving heat for 2h, adding deionized water, heating to 70-90 ℃, reacting for 3-6h, washing and filtering to obtain a component I;
s2: adding the component I, sulfoxide chloride and dimethylformamide into a reaction bottle B, heating to 60-80 ℃, stirring, refluxing, filtering, washing, filtering and drying to obtain a component II;
s3: adding the components of di-p-phenylenediamine and N, N-dimethylacetamide into a reaction bottle C, heating and refluxing in a nitrogen atmosphere, and carrying out suction filtration, washing and vacuum drying to obtain a component III;
s4: adding the third component and deionized water into a reaction kettle, mechanically stirring uniformly, adding aniline and hydrochloric acid solution, mechanically stirring uniformly, adding ammonium persulfate, stirring uniformly, controlling the temperature to-10-0 ℃, carrying out heat preservation reaction for 12-18h, and carrying out suction filtration, washing and drying to obtain the anti-corrosion auxiliary agent.
As a further aspect of the invention: the vinyl CeO 2 The preparation method of the (C) comprises the following steps: dissolving 50g of vinyltrimethoxysilane in 1000mL of absolute ethyl alcohol and 1000mL of deionized water, adjusting the pH value of the solution to be 4 by glacial acetic acid, adjusting the pH value of the solution to be 10 by ammonia water, and adding 25g of nano CeO 2 Heating to 60 ℃, preserving heat and stirring for 2 hours, washing, filtering and drying to obtain vinyl CeO 2 ；
As a further aspect of the invention: vinyl CeO in S1 2 : concentrated sulfuric acid: naNO 3 ：KMnO 4 The mass ratio of (2) is 0.1-0.5:40-60:0.1-0.2:0.5-1:50-100, wherein the concentrated sulfuric acid is a sulfuric acid aqueous solution with the concentration of 75-90 wt%.
As a further aspect of the invention: and in S2, a component I: thionyl chloride: the addition amount of dimethylformamide was 1g:150-250mL:10-15mL.
As a further aspect of the invention: the mass ratio of the components of di-p-phenylenediamine and N, N-dimethylacetamide in S3 is 1:6-9:150-250.
As a further aspect of the invention: in the S4, the mass ratio of the component III to deionized water to aniline to hydrochloric acid solution to ammonium persulfate is 1:30-50:0.7-1.2:1-2.5:1.5-2.5, wherein the hydrochloric acid solution is 5wt% to 8wt% of hydrochloric acid aqueous solution.
As a further aspect of the invention: the epoxy resin was E-51.
As a further aspect of the invention: the defoamer is defoamer BYK-141.
As a further aspect of the invention: the leveling agent is a leveling agent BYK-306.
As a further aspect of the invention: the dispersing agent is one or more of polyethylene wax, polyvinylpyrrolidone and polyethylene glycol.
The invention has the beneficial effects that:
the invention uses vinyl CeO 2 Preparation of antiseptic auxiliary agent, ceO by modifying raw material 2 In the modification process, vinyl, carboxyl and acyl chloride groups are grafted on the surface, finally, through the reaction of P-phenylenediamine and the acyl chloride groups on the surface of ceria, aniline groups are grafted on the surface of ceria, the aniline groups polymerize on the surface of ceria, a polymer coating layer is grafted on the surface of ceria, a rigid benzene ring structure is arranged in the polymer coating layer, N atoms on amine groups at two ends of a molecular chain form a P-pi conjugated structure, a large conjugated system is formed, the flow of electrons is facilitated, a conductive network is formed, and the obtained anti-corrosion auxiliary agent has good conductive performance. The weak current is applied to the metal substrate coated with the anticorrosive paint, and chloride ions in the seawater are electrolyzed, so that the composite paint has certain antifouling performance. The anti-corrosion auxiliary agent is added into the epoxy resin base material to fill the gaps in the coating, so that not only is the attack of corrosive ions on the metal base plate effectively prevented and the pitting corrosion of the base material effectively reduced, but also the nano CeO 2 Ce of surface 3+ And OH-to generate insoluble cerium-based oxide and hydroxide which are attached to the active site of the cathode, so that the occurrence of oxidation-reduction reaction of the cathode is reduced, the peeling of the coating is reduced, and the occurrence of crevice corrosion of the substrate is effectively reduced, thereby protecting the metal substrate from seawater corrosion. The anticorrosive paint prepared by the invention has good permeation resistance and adhesion performance when being coated on the metal surface of the shipAnd has excellent corrosion resistance.
Description of the embodiments
The following description will clearly and fully describe the technical solutions of the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
The preparation method of the preservative auxiliary agent comprises the following steps:
s1: dissolving 50g of vinyltrimethoxysilane in 1000mL of absolute ethyl alcohol and 1000mL of deionized water, adjusting the pH value of the solution to be 4 by glacial acetic acid, adjusting the pH value of the solution to be 10 by ammonia water, and adding 25g of nano CeO 2 Heating to 60 ℃, preserving heat and stirring for 2 hours, washing, filtering and drying to obtain vinyl CeO 2 ；
S2: 10g of vinyl CeO 2 800g of 75wt% concentrated sulfuric acid is added into a reaction bottle A, stirred uniformly and then 2g of NaNO is added 3 、10g KMnO 4 Stirring uniformly, heating to 30 ℃, preserving heat and reacting for 2 hours, adding 1000mL of deionized water, heating to 70 ℃, reacting for 3 hours, washing and filtering to obtain a component I;
s3: adding 5g of the first component, 750mL of thionyl chloride and 50mL of dimethylformamide into a reaction bottle B, heating to 60 ℃, stirring, refluxing for 24 hours, filtering, washing, filtering and drying to obtain a second component;
s4: adding 5g of the component II, 30g of p-phenylenediamine and 750g of N, N-dimethylacetamide into a reaction bottle C, heating and refluxing in a nitrogen atmosphere, filtering, washing and vacuum drying to obtain a component III;
s5: adding 5g of component III and 150mL of deionized water into a reaction kettle, mechanically stirring uniformly, adding 3.5g of aniline and 5g of 5wt% hydrochloric acid solution, mechanically stirring uniformly, adding 7.5g of ammonium persulfate, uniformly stirring, controlling the temperature to minus 10 ℃, preserving the heat, reacting for 12 hours, and carrying out suction filtration, washing and drying to obtain the anti-corrosion auxiliary agent.
Examples
The preparation method of the preservative auxiliary agent comprises the following steps:
s1: dissolving 50g of vinyltrimethoxysilane in 1000mL of absolute ethyl alcohol and 1000mL of deionized water, adjusting the pH value of the solution to be 4 by glacial acetic acid, adjusting the pH value of the solution to be 10 by ammonia water, and adding 25g of nano CeO 2 Heating to 60 ℃, preserving heat and stirring for 2 hours, washing, filtering and drying to obtain vinyl CeO 2 ；
S2: 10g of vinyl CeO 2 1000g of 75wt% concentrated sulfuric acid is added into the reaction bottle A, stirred uniformly and then 3g of NaNO is added 3 、15g KMnO 4 Stirring uniformly, heating to 35 ℃, preserving heat and reacting for 2 hours, adding 1500mL of deionized water, heating to 80 ℃, reacting for 6 hours, washing and filtering to obtain a component I;
s3: adding 5g of the first component, 1000mL of thionyl chloride and 75mL of dimethylformamide into a reaction bottle B, heating to 70 ℃, stirring, refluxing for 24 hours, filtering, washing, filtering and drying to obtain a second component;
s4: adding 5g of the component II, 40g of p-phenylenediamine and 1000g of N, N-dimethylacetamide into a reaction bottle C, heating and refluxing in a nitrogen atmosphere, filtering, washing and vacuum drying to obtain a component III;
s5: adding 5g of component III and 200mL of deionized water into a reaction kettle, mechanically stirring uniformly, adding 5g of aniline and 10g of 5wt% hydrochloric acid solution, mechanically stirring uniformly, adding 10g of ammonium persulfate, uniformly stirring, controlling the temperature to minus 10 ℃, preserving the heat and reacting for 12h, and carrying out suction filtration, washing and drying to obtain the anti-corrosion auxiliary agent.
Examples
The preparation method of the preservative auxiliary agent comprises the following steps:
s1: dissolving 50g of vinyltrimethoxysilane in 1000mL of absolute ethyl alcohol and 1000mL of deionized water, adjusting the pH value of the solution to be 4 by glacial acetic acid, adjusting the pH value of the solution to be 10 by ammonia water, and adding 25g of nano CeO 2 Heating to 60 ℃, preserving heat and stirring for 2 hours, washing, filtering and drying to obtain vinyl CeO 2 ；
S2: 2-10g of vinyl CeO 2 1200g of 75wt% concentrated sulfuric acid is added into a reaction bottle A, stirred evenly and then 4g of NaNO is added 3 、20g KMnO 4 Stirring uniformly, heating to 40 ℃, preserving heat and reacting for 2 hours, adding 2000mL of deionized water, heating to 90 ℃, reacting for 6 hours, washingWashing and filtering to obtain a first component;
s3: adding 5g of the first component, 1250mL of thionyl chloride and 75mL of dimethylformamide into a reaction bottle B, heating to 80 ℃, stirring, refluxing for 24 hours, filtering, washing, filtering and drying to obtain a second component;
s4: adding 5g of component II, 45g of p-phenylenediamine and 1250g of N, N-dimethylacetamide into a reaction bottle C, heating and refluxing in a nitrogen atmosphere, filtering, washing and vacuum drying to obtain a component III;
s5: adding 5g of component III and 250mL of deionized water into a reaction kettle, mechanically stirring uniformly, adding 6g of aniline and 12.5g of 5wt% hydrochloric acid solution, mechanically stirring uniformly, adding 12.5g of ammonium persulfate, uniformly stirring, controlling the temperature to be 0 ℃, preserving the heat, reacting for 18h, and carrying out suction filtration, washing and drying to obtain the anti-corrosion auxiliary agent.
Examples
A method for producing corrosion-resistant aluminum alloy section bar for ships,
(1) Weighing 100 parts of E-51 epoxy resin, 5 parts of the anti-corrosion auxiliary agent prepared in the embodiment 1, 2 parts of the defoamer BYK-141, 0.2 part of the flatting agent BYK-306 and 1 part of polyvinylpyrrolidone according to the following proportion, and uniformly mixing the raw materials according to the proportion;
(2) And (3) coating anti-corrosion paint on the surface of the aluminum alloy profile to obtain the corrosion-resistant aluminum alloy profile for the ship.
Examples
A method for producing corrosion-resistant aluminum alloy section bar for ships,
(1) Weighing 100 parts of E-51 epoxy resin, 5 parts of the anti-corrosion auxiliary agent prepared in the embodiment 2, 2 parts of the defoamer BYK-141, 0.2 part of the flatting agent BYK-306 and 1 part of polyvinylpyrrolidone according to the following proportion, and uniformly mixing the raw materials according to the proportion;
(2) And (3) coating anti-corrosion paint on the surface of the aluminum alloy profile to obtain the corrosion-resistant aluminum alloy profile for the ship.
Examples
A method for producing corrosion-resistant aluminum alloy section bar for ships,
(1) Weighing 100 parts of E-51 epoxy resin, 5 parts of the anti-corrosion auxiliary agent prepared in the embodiment 3, 2 parts of the defoamer BYK-141, 0.2 part of the flatting agent BYK-306 and 1 part of polyvinylpyrrolidone according to the following proportion, and uniformly mixing the raw materials according to the proportion;
(2) And (3) coating anti-corrosion paint on the surface of the aluminum alloy profile to obtain the corrosion-resistant aluminum alloy profile for the ship.
Comparative example 1
The preparation method of the preservative auxiliary agent comprises the following steps:
s1: dissolving 50g of vinyltrimethoxysilane in 1000mL of absolute ethyl alcohol and 1000mL of deionized water, adjusting the pH value of the solution to be 4 by glacial acetic acid, adjusting the pH value of the solution to be 10 by ammonia water, and adding 25g of nano CeO 2 Heating to 60 ℃, preserving heat and stirring for 2 hours, washing, filtering and drying to obtain vinyl CeO 2 ；
S2: 10g of vinyl CeO 2 800g of 75wt% concentrated sulfuric acid is added into a reaction bottle A, stirred uniformly and then 2g of NaNO is added 3 、10g KMnO 4 Stirring uniformly, heating to 30 ℃, preserving heat and reacting for 2 hours, adding 1000mL of deionized water, heating to 70 ℃, reacting for 3 hours, washing and filtering to obtain a component I;
s3: adding 5g of the first component, 750mL of thionyl chloride and 50mL of dimethylformamide into a reaction bottle B, heating to 60 ℃, stirring, refluxing for 24 hours, filtering, washing, filtering and drying to obtain a second component;
s4: adding 5g of the second component, 30g of p-phenylenediamine and 750g of N, N-dimethylacetamide into a reaction bottle C, heating and refluxing in a nitrogen atmosphere, filtering, washing and vacuum drying to obtain the anti-corrosion auxiliary agent.
Comparative example 2
The preservative auxiliary agent is obtained by mixing 5g of the second component and 30g of polyaniline.
Comparative example 3
A method for producing corrosion-resistant aluminum alloy section bar for ships,
(1) Weighing 100 parts of E-51 epoxy resin, 5 parts of the anti-corrosion auxiliary agent prepared in comparative example 1, 2 parts of defoamer BYK-141, 0.2 part of flatting agent BYK-306 and 1 part of polyvinylpyrrolidone according to the following proportion, and uniformly mixing the raw materials according to the proportion;
(2) And (3) coating anti-corrosion paint on the surface of the aluminum alloy profile to obtain the corrosion-resistant aluminum alloy profile for the ship.
Comparative example 4
A method for producing corrosion-resistant aluminum alloy section bar for ships,
(1) Weighing 100 parts of E-51 epoxy resin, 5 parts of the anti-corrosion auxiliary agent prepared in comparative example 2, 2 parts of the defoamer BYK-141, 0.2 part of the flatting agent BYK-306 and 1 part of polyvinylpyrrolidone according to the following proportion, and uniformly mixing the raw materials according to the proportion;
(2) And (3) coating anti-corrosion paint on the surface of the aluminum alloy profile to obtain the corrosion-resistant aluminum alloy profile for the ship.
Comparative example 5
A method for producing corrosion-resistant aluminum alloy section bar for ships,
(1) 100 parts of E-51 epoxy resin and 5 parts of nano CeO used in example 1 are weighed according to the following proportion 2 2 parts of defoaming agent BYK-141, 0.2 part of flatting agent BYK-306 and 1 part of polyvinylpyrrolidone, and uniformly mixing the raw materials according to a proportion;
(2) And (3) coating anti-corrosion paint on the surface of the aluminum alloy profile to obtain the corrosion-resistant aluminum alloy profile for the ship.
Performance detection
(1) Electrochemical resistance performance test: the prepared coating is subjected to electrochemical impedance test by using a PARSTAT2273 electrochemical impedance tester manufactured by Amiteck, inc. of the United states, then is put into a simulated corrosion salt solution for 30 days, and after being dried, the electrochemical impedance performance of the coating is tested, and the detection result is shown in Table 1;
with a three-electrode arrangement, each with an exposed area of about 7cm 2 The working electrode of the sample, the saturated calomel electrode as a reference electrode and the platinum electrode as a counter electrode. Rc represents the coating resistance and Qc represents the constant phase angle element.
Table 1: corrosion resistance of the coatings of examples 4-6 and comparative examples 3-5
As can be seen from Table 1, the coatings prepared in examples 4-6 of the present application have higher Rc and lower Qc values than the coatings prepared in comparative examples 3-5, indicating that the coatings have good properties of protecting metal substrates.
(2) The adhesion between the coating and the substrate was tested according to the method in GB/T9286-1998 Cross-cut test of paint films of colored paint and varnish, the coating was scored at a 1mm distance, and the adhesion test standard grade is shown in Table 2. The method comprises the steps of forming grid-shaped scratches on a coating and a substrate during manual cutting, lightly brushing back and forth for a plurality of times by using a hairbrush, adhering the grid-marked coating by using a special transparent adhesive tape, rapidly and stably tearing the adhesive tape, observing the shedding condition of the grid on the surface of the coating by using an magnifying glass for inspection, and calculating the area of the grid of the shedding coating to evaluate the level of adhesive force, wherein the adhesive force is divided into 0-5 levels; the results are shown in Table 3;
table 2: adhesion grade
(3) Flexibility: the results of the detection according to GB/T1732-93 are shown in Table 3;
(4) Impact resistance test: the impact resistance of the paint film was measured according to GB/T1732-93 by the hammer impact method, and the results are shown in Table 3;
table 3: examples 4 to 6 and comparative examples 3 to 5 coating mechanical property test data
As can be seen from Table 3, the coatings prepared in examples 4-6 of the present application have excellent adhesion and mechanical properties, and are suitable for the field of corrosion and fouling prevention of ships.
The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.

Claims (6)

1. A production method of a corrosion-resistant aluminum alloy profile for ships is characterized in that an anticorrosive paint is coated on the surface of the aluminum alloy profile; the anticorrosive paint comprises the following raw materials in parts by weight: 100 parts of epoxy resin base material, 2-6 parts of preservative auxiliary agent, 1-3 parts of defoamer, 0.2-0.6 part of flatting agent and 1-2 parts of dispersing agent.
2. The method for producing the corrosion-resistant aluminum alloy profile for the ship according to claim 1, wherein the method for preparing the corrosion-resistant auxiliary agent comprises the following steps:
s1: vinyl CeO 2 Adding concentrated sulfuric acidIn the reaction bottle A, stirring uniformly, and then adding NaNO 3 、KMnO 4 Stirring uniformly, heating to 30-40 ℃, preserving heat for 2h, adding deionized water, heating to 70-90 ℃, reacting for 3-6h, washing and filtering to obtain a component I;
s2: adding the component I, sulfoxide chloride and dimethylformamide into a reaction bottle B, heating to 60-80 ℃, stirring, refluxing, filtering, washing, filtering and drying to obtain a component II;
s3: adding the components of di-p-phenylenediamine and N, N-dimethylacetamide into a reaction bottle C, heating and refluxing in a nitrogen atmosphere, and carrying out suction filtration, washing and vacuum drying to obtain a component III;
s4: adding the third component and deionized water into a reaction kettle, mechanically stirring uniformly, adding aniline and hydrochloric acid solution, mechanically stirring uniformly, adding ammonium persulfate, stirring uniformly, controlling the temperature to-10-0 ℃, carrying out heat preservation reaction for 12-18h, and carrying out suction filtration, washing and drying to obtain the anti-corrosion auxiliary agent.
3. The method for producing a corrosion-resistant aluminum alloy profile for a ship according to claim 2, wherein the vinyl CeO in S1 2 : concentrated sulfuric acid: naNO 3 ：KMnO 4 The mass ratio of (2) is 0.1-0.5:40-60:0.1-0.2:0.5-1:50-100, wherein the concentrated sulfuric acid is a sulfuric acid aqueous solution with the concentration of 75-90 wt%.
4. The production method of the corrosion-resistant aluminum alloy profile for ships according to claim 2, wherein the production method comprises the following steps: and in S2, a component I: thionyl chloride: the addition amount of dimethylformamide was 1g:150-250mL:10-15mL.
5. The production method of the corrosion-resistant aluminum alloy profile for ships according to claim 2, wherein the production method comprises the following steps: the mass ratio of the components of di-p-phenylenediamine and N, N-dimethylacetamide in S3 is 1:6-9:150-250.
6. The production method of the corrosion-resistant aluminum alloy profile for ships according to claim 2, wherein the production method comprises the following steps: in the S4, the mass ratio of the component III to deionized water to aniline to hydrochloric acid solution to ammonium persulfate is 1:30-50:0.7-1.2:1-2.5:1.5-2.5, wherein the hydrochloric acid solution is 5wt% to 8wt% of hydrochloric acid aqueous solution.
CN202310279433.4A 2023-03-22 2023-03-22 Production method of corrosion-resistant aluminum alloy profile for ship Pending CN116179053A (en)

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Citations (2)

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