Deicing salt corrosion resistant coating for bridge concrete guardrail

Abstract

The invention provides a deicing salt corrosion resistant coating for a bridge concrete guardrail, and relates to the technical field of concrete coatings. The deicing salt corrosion resistant coating comprises the following raw materials in parts by weight: 30-60% of resin, 3-6% of a curing agent, 5-40% of a filler, 5-25% of a solvent, 1-5% of an additive, 1-10% of an organic pigment, 3-6% of a modifier, 1-3% of ethylene glycol monoethyl ether acetate, 1-3% of polybenzimidazole, 1-3% of zinc borate, 1-3% of nickel oxide, 1-3% of an ultraviolet light absorber, 1-3% of a biological insecticide and 2-5% of an antibacterial agent. By adding the ethylene glycol ethyl ether acetate, the polybenzimidazole, the zinc borate and the nickel oxide, the coating has good deicing salt resistance, can effectively resist the corrosion effect of salt on the bridge concrete guardrail, and contains the ultraviolet light absorber and the nickel oxide which are beneficial to enhancing the weather resistance and the ultraviolet resistance of the coating, so that the corrosion resistance of the bridge concrete guardrail is improved, and the service life of the bridge concrete guardrail is prolonged. And the service life in an outdoor environment is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of concrete coatings, in particular to a deicing salt corrosion resistant coating for a bridge concrete guardrail. Background Art

[0002] The deicing salt corrosion resistant coating for bridge concrete guardrail is a surface coating specially designed to protect bridge structures. Its main function is to resist the erosion and corrosion of deicing salt on the concrete surface.

[0003] Corrosion on the surface of concrete guardrails is a common problem, especially in areas where deicing salts (such as sodium chloride or calcium chloride) are used. These salt compounds can penetrate the concrete and cause corrosion on the surface of the guardrail, causing damage and destruction to the concrete structure. Although concrete generally has good durability, its durability may be greatly reduced in environments containing deicing salts. Over long-term use, the life of the guardrail may be affected, requiring more frequent maintenance and repairs. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a deicing salt corrosion-resistant coating for a bridge concrete guardrail, which solves the problem that in areas where deicing salt is used, these salt compounds can penetrate into the concrete and cause corrosion on the surface of the guardrail, leading to damage and destruction of the concrete structure.

[0005] To achieve the above objectives, the present invention is implemented through the following technical scheme: a deicing salt corrosion resistant coating for a bridge concrete guardrail, comprising the following raw materials in parts by weight: 30-60% resin, 3-6% curing agent, 5-40% filler, 5-25% solvent, 1-5% additive, 1-10% organic pigment, 3-6% modifier, 1-3% ethylene glycol ethyl ether acetate, 1-3% polybenzimidazole, 1-3% zinc borate, 1-3% nickel oxide, 1-3% ultraviolet absorber, 1-3% biopesticide and 2-5% antibacterial agent.

[0006] Preferably, the resin is selected from any one of epoxy resin, polyurethane resin and acrylic resin, and the curing agent is selected from any one of benzoic acid, fatty acid and hydroxyl.

[0007] Preferably, the filler is selected from any one of silicon dioxide, talc, iron oxide and titanium dioxide, and the solvent is selected from any one of acetone, butanone and xylene.

[0008] Preferably, the additive is selected from any one of polysiloxane, phosphite and phosphate, and the organic pigment is selected from any one of ferrite pigment and quinoneamine pigment.

[0009] Preferably, the modifier is selected from any one of aminosilane and vinylsilane, and the ultraviolet absorber is selected from any one of 2-(2-hydroxyphenyl)benzothiazole and benzothiadiazole.

[0010] Preferably, the biopesticide is selected from methylisothiazolinone, and the antibacterial agent is selected from any one of cupric chloride, dodecyltrimethylammonium chloride and hexadecyltrimethylammonium bromide.

[0011] Preferably, a method for preparing a deicing salt corrosion resistant coating for a bridge concrete guardrail comprises the following steps:

[0012] S1. Mixing of resin and curing agent

[0013] Add all the resin into the mixer and stir at a speed of 100-250 r / min, and add the curing agent into the mixer three times during the stirring process until all the curing agent is added, then stop stirring after continuing stirring for 3-5 minutes to obtain a mixture;

[0014] S2. Adding fillers and solvents

[0015] Add fillers gradually into the mixture, add 2 / 3 of the solvent at the same time, and continue stirring at a speed of 50-80r / min to ensure that the fillers and solvents can be evenly dispersed and form a uniform coating;

[0016] S3. Adding additives, organic pigments and modifiers

[0017] Gradually add additives, organic pigments and modifiers to the coating obtained in S2, and stir at a speed of 80-180 r / min, and heat the mixer to 10-25°C, continue heating and stirring for 2-6 minutes, then stop stirring and let it stand for 5-8 minutes;

[0018] S4. Addition of specific ingredients

[0019] Adding ethylene glycol ethyl ether acetate, polybenzimidazole, zinc borate, nickel oxide, ultraviolet absorber, biopesticide and antibacterial agent in sequence, and stirring at a speed of 100-300 r / min to ensure that each component is completely dissolved and mixed;

[0020] S5. Fully stir and adjust the coating properties

[0021] Adjust the speed of the mixer to 500-600r / min to fully stir the coating, and add the remaining 1 / 3 of the solvent during the stirring process to ensure that it is evenly dispersed. Then adjust the speed of the mixer to 10-50r / min and heat the internal temperature to 30-70°C. Continue stirring and heating the reaction for 3-8 minutes, then let it stand for 10-20 minutes to obtain a deicing salt corrosion-resistant coating.

[0022] The present invention provides a deicing salt corrosion resistant coating for a bridge concrete guardrail, which has the following beneficial effects:

[0023] 1. The present invention adds ethylene glycol ethyl ether acetate, polybenzimidazole, zinc borate and nickel oxide components. This coating has good resistance to deicing salt and can effectively resist the corrosion of deicing salt on bridge concrete guardrails. It also contains ultraviolet absorbers and nickel oxide, which help to enhance the weather resistance and anti-ultraviolet ability of the coating and extend its service life in outdoor environments.

[0024] 2. The present invention can effectively inhibit the growth of microorganisms by adding antibacterial agents and biopesticides, thereby reducing coating damage and color changes caused by microbial contamination, and uses different types of resins, fillers and solvents to make the coating have good adaptability and stability under different environmental conditions, ensuring that it can perform well under a wide range of climatic and geographical conditions.

[0025] 3. The present invention helps to improve the hardness, wear resistance and impact resistance of the coating through the selection of fillers and the use of additives, so that it can effectively protect the bridge concrete guardrail from damage caused by external forces. In general, this coating not only has basic protective functions, but also improves weather resistance, chemical corrosion resistance and biological resistance through the composite effect of multiple components, which can effectively protect the bridge structure. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Embodiment 1:

[0028] An embodiment of the present invention provides a deicing salt corrosion resistant coating for a bridge concrete guardrail, comprising the following raw materials in parts by weight: 30% resin, 3% curing agent, 5% filler, 5% solvent, 1% additive, 1% organic pigment, 3% modifier, 1% ethylene glycol ethyl ether acetate, 1% polybenzimidazole, 1% zinc borate, 1% nickel oxide, 1% ultraviolet absorber, 1% biopesticide and 2% antibacterial agent.

[0029] The resin is selected from any one of epoxy resin, polyurethane resin and acrylic resin, and the curing agent is selected from any one of benzoic acid, fatty acid and hydroxyl.

[0030] The filler is selected from any one of silicon dioxide, talc, iron oxide and titanium dioxide, and the solvent is selected from any one of acetone, butanone and xylene.

[0031] The additive is selected from any one of polysiloxane, phosphite and phosphate, and the organic pigment is selected from any one of ferrite pigment and quinoneamine pigment.

[0032] The modifier is selected from any one of aminosilane and vinylsilane, and the ultraviolet absorber is selected from any one of 2-(2-hydroxyphenyl)benzothiazole and benzothiadiazole.

[0033] The biological insecticide is selected from methylisothiazolinone, and the antibacterial agent is selected from any one of copper chloride, dodecyltrimethylammonium chloride and hexadecyltrimethylammonium bromide.

[0034] A method for preparing a deicing salt corrosion resistant coating for a bridge concrete guardrail comprises the following steps:

[0035] S1. Mixing of resin and curing agent

[0036] Add all the resin into the mixer and stir at a speed of 100 r / min, and add the curing agent into the mixer three times during the stirring process until all the curing agent is added, then stop stirring after continuing stirring for 3 minutes to obtain a mixture;

[0037] S2. Adding fillers and solvents

[0038] Add fillers gradually into the mixture, add 2 / 3 of the solvent at the same time, and continue stirring at a speed of 50r / min to ensure that the fillers and solvents can be evenly dispersed and form a uniform coating;

[0039] S3. Adding additives, organic pigments and modifiers

[0040] Add additives, organic pigments and modifiers to the coating obtained in S2 stepwise, stir at a speed of 80-180 r / min, heat the stirrer to 10°C, continue heating and stirring for 2 minutes, then stop stirring and let stand for 5 minutes;

[0041] S4. Addition of specific ingredients

[0042] Ethylene glycol ether acetate, polybenzimidazole, zinc borate, nickel oxide, ultraviolet absorber, biopesticide and antibacterial agent were added in sequence, and stirred at a speed of 100 r / min to ensure that each component was completely dissolved and mixed;

[0043] S5. Fully stir and adjust the coating properties

[0044] The speed of the mixer is adjusted to 500 r / min to fully stir the coating, and the remaining 1 / 3 of the solvent is added during the stirring process to ensure that it is evenly dispersed. The speed of the mixer is adjusted to 10 r / min, and the internal temperature is heated to 30°C. After continuous stirring and heating reaction for 3 minutes, it is allowed to stand for 10 minutes to obtain a deicing salt corrosion-resistant coating.

[0045] In summary, due to the presence of ethylene glycol ether acetate, polybenzimidazole, zinc borate and nickel oxide, this coating has good resistance to deicing salt, can effectively resist the corrosion of salt on bridge concrete guardrails, and contains ultraviolet absorbers and nickel oxide, which help to enhance the weather resistance and UV resistance of the coating and extend its service life in outdoor environments. The addition of antimicrobial agents and biocides can effectively inhibit the growth of microorganisms, thereby reducing coating damage and color changes caused by microbial contamination, and the use of different types of resins, fillers and solvents makes the coating have good adaptability and stability under different environmental conditions, ensuring that it can perform well under a wide range of climatic and geographical conditions. The selection of fillers and the use of additives help to improve the hardness, wear resistance and impact resistance of the coating, so that it can effectively protect the bridge concrete guardrail from damage caused by external forces. In general, this coating not only has basic protective functions, but also improves weather resistance, chemical corrosion resistance and biological resistance through the composite action of multiple components, which can effectively protect the bridge structure.

[0046] Embodiment 2:

[0047] An embodiment of the present invention provides a deicing salt corrosion resistant coating for a bridge concrete guardrail, comprising the following raw materials in parts by weight: 60% resin, 6% curing agent, 40% filler, 25% solvent, 5% additive, 10% organic pigment, 6% modifier, 3% ethylene glycol ethyl ether acetate, 3% polybenzimidazole, 3% zinc borate, 3% nickel oxide, 3% ultraviolet absorber, 3% biopesticide and 5% antibacterial agent.

[0048] The resin is selected from any one of epoxy resin, polyurethane resin and acrylic resin, and the curing agent is selected from any one of benzoic acid, fatty acid and hydroxyl.

[0049] The filler is selected from any one of silicon dioxide, talc, iron oxide and titanium dioxide, and the solvent is selected from any one of acetone, butanone and xylene.

[0050] The additive is selected from any one of polysiloxane, phosphite and phosphate, and the organic pigment is selected from any one of ferrite pigment and quinoneamine pigment.

[0051] The modifier is selected from any one of aminosilane and vinylsilane, and the ultraviolet absorber is selected from any one of 2-(2-hydroxyphenyl)benzothiazole and benzothiadiazole.

[0052] The biological insecticide is selected from methylisothiazolinone, and the antibacterial agent is selected from any one of copper chloride, dodecyltrimethylammonium chloride and hexadecyltrimethylammonium bromide.

[0053] A method for preparing a deicing salt corrosion resistant coating for a bridge concrete guardrail comprises the following steps:

[0054] S1. Mixing of resin and curing agent

[0055] Add all the resin into the mixer and stir at a speed of 250 r / min. During the stirring process, add the curing agent into the mixer three times until all the curing agent is added. Then, stop stirring after continuing stirring for 5 minutes to obtain a mixture.

[0056] S2. Adding fillers and solvents

[0057] Add fillers gradually into the mixture, add 2 / 3 of the solvent at the same time, and continue stirring at a speed of 80r / min to ensure that the fillers and solvents can be evenly dispersed and form a uniform coating;

[0058] S3. Adding additives, organic pigments and modifiers

[0059] Add additives, organic pigments and modifiers to the coating obtained in S2 stepwise, stir at a speed of 180 r / min, heat the stirrer to 25°C, continue heating and stirring for 6 min, then stop stirring and let stand for 8 min;

[0060] S4. Addition of specific ingredients

[0061] Ethylene glycol ether acetate, polybenzimidazole, zinc borate, nickel oxide, ultraviolet absorber, biopesticide and antibacterial agent were added in sequence, and stirred at a speed of 300 r / min to ensure that each component was completely dissolved and mixed;

[0062] S5. Fully stir and adjust the coating properties

[0063] The speed of the mixer was adjusted to 600 r / min to fully stir the coating, and the remaining 1 / 3 of the solvent was added during the stirring process to ensure that it was evenly dispersed. The speed of the mixer was adjusted to 50 r / min, and the internal temperature was heated to 70°C. After continuous stirring and heating reaction for 8 minutes, it was allowed to stand for 20 minutes to obtain a deicing salt corrosion-resistant coating.

[0064] In summary, due to the presence of ethylene glycol ether acetate, polybenzimidazole, zinc borate and nickel oxide, this coating has good resistance to deicing salt, can effectively resist the corrosion of salt on bridge concrete guardrails, and contains ultraviolet absorbers and nickel oxide, which help to enhance the weather resistance and UV resistance of the coating and extend its service life in outdoor environments. The addition of antimicrobial agents and biocides can effectively inhibit the growth of microorganisms, thereby reducing coating damage and color changes caused by microbial contamination, and the use of different types of resins, fillers and solvents makes the coating have good adaptability and stability under different environmental conditions, ensuring that it can perform well under a wide range of climatic and geographical conditions. The selection of fillers and the use of additives help to improve the hardness, wear resistance and impact resistance of the coating, so that it can effectively protect the bridge concrete guardrail from damage caused by external forces. In general, this coating not only has basic protective functions, but also improves weather resistance, chemical corrosion resistance and biological resistance through the composite action of multiple components, which can effectively protect the bridge structure.

[0065] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A deicing salt corrosion resistant coating for a bridge concrete guardrail, characterized in that: The invention comprises the following raw materials in parts by weight: 30-60% of resin, 3-6% of curing agent, 5-40% of filler, 5-25% of solvent, 1-5% of additive, 1-10% of organic pigment, 3-6% of modifier, 1-3% of ethylene glycol ethyl ether acetate, 1-3% of polybenzimidazole, 1-3% of zinc borate, 1-3% of nickel oxide, 1-3% of ultraviolet absorber, 1-3% of biological pesticide and 2-5% of antibacterial agent.

2. The deicing salt corrosion resistant coating for bridge concrete guardrail according to claim 1 is characterized by: The resin is selected from any one of epoxy resin, polyurethane resin and acrylic resin, and the curing agent is selected from any one of benzoic acid, fatty acid and hydroxyl.

3. The deicing salt corrosion resistant coating for bridge concrete guardrail according to claim 1 is characterized by: The filler is selected from any one of silicon dioxide, talc, iron oxide and titanium dioxide, and the solvent is selected from any one of acetone, butanone and xylene.

4. The deicing salt corrosion resistant coating for bridge concrete guardrail according to claim 1 is characterized by: The additive is selected from any one of polysiloxane, phosphite and phosphate, and the organic pigment is selected from any one of ferrite pigment and quinone amine pigment.

5. The deicing salt corrosion resistant coating for bridge concrete guardrail according to claim 1, characterized in that: The modifier is selected from any one of aminosilane and vinylsilane, and the ultraviolet absorber is selected from any one of 2-(2-hydroxyphenyl)benzothiazole and benzothiadiazole.

6. The deicing salt corrosion resistant coating for bridge concrete guardrail according to claim 1, characterized in that: The biopesticide is selected from methylisothiazolinone, and the antibacterial agent is selected from any one of copper chloride, dodecyltrimethylammonium chloride and hexadecyltrimethylammonium bromide.

7. A method for preparing a deicing salt corrosion resistant coating for a bridge concrete guardrail, characterized in that: The following steps are involved: S1. Mixing of resin and curing agent Add all the resin into the mixer and stir at a speed of 100-250 r / min, and add the curing agent into the mixer three times during the stirring process until all the curing agent is added, then stop stirring after continuing stirring for 3-5 minutes to obtain a mixture; S2. Add fillers and solvents Add fillers gradually into the mixture, add 2 / 3 of the solvent at the same time, and continue stirring at a speed of 50-80r / min to ensure that the fillers and solvents can be evenly dispersed and form a uniform coating; S3. Adding additives, organic pigments and modifiers Gradually add additives, organic pigments and modifiers to the coating obtained in S2, and stir at a speed of 80-180 r / min, and heat the mixer to 10-25°C, continue heating and stirring for 2-6 minutes, then stop stirring and let it stand for 5-8 minutes; S4. Addition of specific ingredients Adding ethylene glycol ethyl ether acetate, polybenzimidazole, zinc borate, nickel oxide, ultraviolet absorber, biopesticide and antibacterial agent in sequence, and stirring at a speed of 100-300 r / min to ensure that each component is completely dissolved and mixed; S5. Fully stir and adjust the coating properties Adjust the speed of the mixer to 500-600r / min to fully stir the coating, and add the remaining 1 / 3 of the solvent during the stirring process to ensure that it is evenly dispersed. Then adjust the speed of the mixer to 10-50r / min and heat the internal temperature to 30-70°C. Continue stirring and heating the reaction for 3-8 minutes, then let it stand for 10-20 minutes to obtain a deicing salt corrosion-resistant coating.