High-weather-resistance corrugated beam guardrail and preparation process thereof

Abstract

According to the high-weather-resistant corrugated beam guardrail and the preparation technology thereof, the corrugated beam guardrail comprises two stand columns arranged oppositely and a corrugated guardrail plate arranged between the two stand columns, each stand column comprises a first base material and a first weather-resistant paint layer arranged on the surface of the first base material, and the corrugated guardrail plate comprises a second base material and a second weather-resistant paint layer arranged on the surface of the second base material; the first weather-resistant paint layer is formed by coating and drying first weather-resistant paint liquid for multiple times, the first weather-resistant paint liquid is composed of a first component and a second component, and the first component is prepared from epoxy resin, alkyd resin, zinc phosphate, an anti-settling agent, glycerol monolaurate, a dispersing agent, a defoaming agent, a flatting agent and triethanolamine; the second component comprises the following raw materials: hydroxy acrylic resin, epoxidized soybean oil, zinc oxide, polyamide wax slurry, emulsified silicone oil, dimethoxypropane and divinyldimethylsilane, and by limiting the raw material composition of the weather-resistant paint layer, the weather resistance and aging resistance of the prepared product are enhanced, and the service life of the product is prolonged.

Description

Technical Field

[0001] The present invention belongs to the field of preparation of corrugated beam guardrails, and particularly relates to a highly weather-resistant corrugated beam guardrail and a preparation process thereof. Background Art

[0002] At present, with the development of transportation, roads, railways, etc. have been built in many remote mountainous areas or some essential transportation fortresses. For roads, especially highways, vehicle collisions, debris flows and other accidents often occur on these rugged mountain roads.

[0003] In order to solve the above technical problems, the existing common practice is to set guardrails on the side of the highway, especially on the dangerous side, such as the cliff side, the river side or the steep slope side, or to reinforce the side prone to collapse, so as to protect the safety of vehicles and personnel in abnormal emergency situations. Most of the existing highway guardrails are made of carbon steel materials. Since the rust layer on the surface of ordinary Q235 carbon steel is a single-layer structure with porous and poor adsorption properties, cracks in the rust layer are common and concentrated on the outermost part of the rust layer. Such a structure has almost no barrier to the entry of adsorbed water and sediments, and they penetrate into the base metal to continue the corrosion process. Therefore, the corrosion resistance of this kind of steel is poor, and generally, galvanizing treatment and spraying treatment are required for anti-corrosion to increase the service life of the steel; however, pickling is required for the pretreatment of galvanizing, which has a risk of hydrogen embrittlement and belongs to a heavy pollution and high-energy-consuming public welfare project, and it is not resistant to acid, alkali, salt, and humid and hot environments; in addition, the coating on the surface of the galvanized layer has low weather resistance, resulting in a low service life of the prepared guardrail and greatly increasing the maintenance cost of the guardrail, which urgently needs to be improved. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a highly weather-resistant corrugated beam guardrail and a preparation process thereof.

[0005] The present invention adopts the following technical solutions:

[0006] A highly weather-resistant corrugated beam guardrail includes two oppositely arranged columns and a corrugated guardrail plate arranged between the two columns. The column includes a first base material and a first weather-resistant paint layer arranged on the surface of the first base material. The corrugated guardrail plate includes a second base material and a second weather-resistant paint layer arranged on the surface of the second base material. The component contents of the first weather-resistant paint layer and the second weather-resistant paint layer are the same, and they are respectively formed by repeatedly coating and drying a first weather-resistant paint liquid and a second weather-resistant paint liquid. The first weather-resistant paint liquid is composed of a first component and a second component in a weight ratio of 1:0.24 - 0.28.

[0007] The first component comprises raw materials in the following parts by weight: 50 - 60 parts of epoxy resin, 25 - 32 parts of alkyd resin, 10 - 15 parts of zinc phosphate, 2 - 3 parts of anti-settling agent, 0.2 - 0.3 part of monoglyceryl laurate, 1 - 2 parts of dispersant, 0.5 - 1 part of defoaming agent, 1 - 1.5 parts of leveling agent, and 1 - 3 parts of triethanolamine;

[0008] The second component comprises raw materials in the following parts by weight: 70 - 80 parts of hydroxyl acrylic resin, 22 - 27 parts of epoxy soybean oil, 12 - 16 parts of zinc oxide, 5 - 8 parts of polyamide wax paste, 10 - 15 parts of emulsifying silicone oil, 3 - 5 parts of dimethoxypropane, and 2 - 4 parts of divinyldimethylsilane.

[0009] Preferably, the dispersant is composed of vinyl bisstearamide, sorbitan fatty acid ester, and polyethylene glycol in a mass ratio of 1:1:2.

[0010] Preferably, the anti-settling agent is hydrogenated castor oil.

[0011] Preferably, the leveling agent is composed of polydimethylsiloxane and KMT-5519 leveling agent in a mass ratio of 1:1.

[0012] Preferably, the preparation method of the first weather-resistant paint layer specifically comprises the following steps:

[0013] A. Pour the epoxy resin and alkyd resin into a stirring kettle, stir at a speed of 200 - 300 r / min for 8 - 10 min, then add zinc phosphate, stir at a speed of 500 - 600 r / min for 10 - 15 min, then add triethanolamine, dispersant, monoglyceryl laurate, and leveling agent, and continue to stir for 18 - 22 min while keeping the speed unchanged. Finally, add the defoaming agent and stir at a speed of 600 - 800 r / min for 25 - 35 min to obtain the first component;

[0014] B. Feed the zinc oxide into a calcining furnace, calcine at 980 - 1020 for 30 min, cool to room temperature, and crush it into zinc oxide powder with a particle size of 100 - 150 mesh;

[0015] C. Pour the hydroxyl acrylic resin into a stirring kettle, then add the zinc oxide powder obtained in step B, stir at a speed of 250 - 350 r / min for 10 - 15 min, then sequentially add epoxy soybean oil, polyamide wax paste, emulsifying silicone oil, dimethoxypropane, and divinyldimethylsilane, and stir at a speed of 500 - 600 r / min for 25 - 35 min to obtain the second component;

[0016] D. Pour the first component and the second component into a stirring kettle in sequence, stir at a speed of 600 - 800 r / min for 30 - 40 min to obtain the first weather-resistant paint liquid.

[0017] A preparation process for a highly weather-resistant corrugated beam guardrail specifically includes the following steps:

[0018] Step 1: Grind the surfaces of the first substrate and the second substrate to form a rough surface on the surfaces of the first substrate and the second substrate;

[0019] Step 2: Coat the first weather-resistant paint liquid and the second weather-resistant paint liquid on the surfaces of the first substrate and the second substrate respectively, and then place them in a temperature of 28 - 32 °C and a relative humidity of 60 - 65% to dry for 6 - 8 minutes;

[0020] Step 3: Continuously coat the second weather-resistant paint liquid and the third weather-resistant paint liquid on the coating formed in Step 2, and then place them in a temperature of 30 - 35 °C and a relative humidity of 60 - 65% to dry for 5 - 7 minutes;

[0021] Step 4: Continuously coat the second weather-resistant paint liquid and the third weather-resistant paint liquid on the coating formed in Step 3, and then place them in a temperature of 35 - 40 °C and a relative humidity of 68 - 72% to dry for 5 - 7 minutes. Then, control the temperature to drop to 28 - 32 °C for heat preservation treatment for 10 - 15 minutes to form a first weather-resistant paint layer and a second weather-resistant paint layer on the surfaces of the first substrate and the second substrate.

[0022] Preferably, in Step 2, the coating thickness of the first weather-resistant paint liquid and the second weather-resistant paint liquid is 0.4 - 0.5 mm.

[0023] Preferably, in Step 3, the coating thickness of the first weather-resistant paint liquid and the second weather-resistant paint liquid is 0.2 - 0.3 mm.

[0024] Preferably, in Step 4, the coating thickness of the second weather-resistant paint liquid and the second weather-resistant paint liquid is 0.5 - 0.7 mm.

[0025] As can be seen from the above description of the present invention, compared with the prior art, the beneficial effects of the present invention are as follows: The corrugated beam guardrail prepared in this application has good mechanical properties, with a lower yield strength of 280 MPa, a tensile strength of 410 MPa, and an elongation at break of 40 MPa, meeting the usage requirements of road guardrails. Specifically, by defining the raw material composition of the weather-resistant paint layer, the weather resistance and anti-aging properties of the prepared corrugated beam guardrail are greatly enhanced. Among them, the salt spray corrosion resistance reaches 1500 hours, and the damp heat resistance reaches 1000 h, extending the service life of the corrugated beam guardrail. Further defining the preparation process of the corrugated beam guardrail, through the combination of grinding, multiple coatings, and multiple drying processes, the weather-resistant paint layer is stably attached to the product surface. The above process replaces the galvanizing treatment and spraying treatment in the prior art, without molten zinc ingots and aluminum ingots, reducing heat loss, exhaust gas, and dust emissions, and replacing pickling, without hydrogen embrittlement and pollution emissions. At the same time, the weather-resistant paint liquid can directly renovate the original two-wave and three-wave old guardrails, solving many problems such as the difficult treatment of zinc layers, coatings, and dust on the surface of old guardrails and the non-return of steel mills;

[0026] Specifically define the raw material composition of the first component, with epoxy resin and alkyd resin as the main raw materials, and further define the composition of the dispersant, which consists of vinyl bisstearamide, sorbitan fatty acid ester, polyethylene glycol, and an anti-settling agent, so that the raw materials are mixed without precipitation, ensuring the formation of a uniform weather-resistant paint layer on the substrate surface. And because hydrogenated castor oil is selected as the anti-settling agent, it will cause unevenness on the surface of the weather-resistant paint layer, affecting the overall performance of the prepared corrugated beam guardrail. Therefore, this application adds a leveling agent and further defines the composition of the leveling agent to make up for the leveling problem of the paint liquid caused by the addition of hydrogenated castor oil;

[0027] Specifically define the raw material composition of the second component, adding emulsifying silicone oil, dimethylaminopropane, epoxy soybean oil, and other raw materials, so that when the weather-resistant paint liquid is coated, it can diffuse from the rough surface into the porous structure of the substrate, and cooperate with multiple drying processes, so that the weather-resistant paint layer can be stably compounded on the substrate surface, ensuring the service life of the prepared weather-resistant corrugated beam guardrail;

[0028] Specifically define the preparation process of the corrugated beam guardrail. Through multiple coating processes combined with multiple drying processes, the prepared weather-resistant paint layer is stably attached to the substrate surface, and further define the process of the last drying. The paint layer formed by drying is kept at a temperature of 28 - 32 °C and a relative humidity of 68 - 72% for a certain period of time to prevent cracks from occurring in the prepared weather-resistant paint layer, affecting the subsequent service life of the corrugated beam guardrail. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Performance test results of the column prepared in Example 3 Figure 1 ;

[0030] Figure 2 Performance test results of the column prepared in Example 3 Figure 2 。 Specific implementation manners

[0031] The present invention will be further described below through specific implementation manners.

[0032] A highly weather-resistant corrugated beam guardrail includes two oppositely arranged columns and a corrugated guardrail plate arranged between the two columns. Among them, the column includes a first base material and a first weather-resistant paint layer arranged on the surface of the first base material, and the corrugated guardrail plate includes a second base material and a second weather-resistant paint layer arranged on the surface of the second base material. Specifically, the component contents of the first weather-resistant paint layer and the second weather-resistant paint layer are the same, and are respectively formed by repeatedly coating and drying the first weather-resistant paint liquid and the second weather-resistant paint liquid.

[0033] The first weather-resistant paint liquid is composed of a first component and a second component in a weight ratio of 1:0.24 - 0.28.

[0034] The first component includes the following raw materials in parts by weight: 50 - 60 parts of epoxy resin, 25 - 32 parts of alkyd resin, 10 - 15 parts of zinc phosphate, 2 - 3 parts of hydrogenated castor oil, 0.2 - 0.3 parts of monoglyceryl laurate, 1 - 2 parts of dispersant, 0.5 - 1 part of defoamer, 1 - 1.5 parts of leveling agent, 1 - 3 parts of triethanolamine; among them, the dispersant is composed of vinyl bisstearamide, sorbitan fatty acid ester, and polyethylene glycol in a mass ratio of 1:1:2; the leveling agent is composed of polydimethylsiloxane and KMT-5519 leveling agent in a mass ratio of 1:1.

[0035] The second component includes the following raw materials in parts by weight: 70 - 80 parts of hydroxyl acrylic resin, 22 - 27 parts of epoxy soybean oil, 12 - 16 parts of zinc oxide, 5 - 8 parts of polyamide wax paste, 10 - 15 parts of emulsifying silicone oil, 3 - 5 parts of dimethoxypropane, 2 - 4 parts of divinyldimethylsilane.

[0036] The preparation method of the first weather-resistant paint layer specifically includes the following steps:

[0037] A. Pour the epoxy resin and the alkyd resin into a stirring kettle, stir at a speed of 200 - 300 r / min for 8 - 10 min, then add zinc phosphate, stir at a speed of 500 - 600 r / min for 10 - 15 min, then add triethanolamine, dispersant, monoglyceryl laurate, and leveling agent, and continue to stir for 18 - 22 min while keeping the speed unchanged. Finally, add the defoamer and stir at a speed of 600 - 800 r / min for 25 - 35 min to obtain the first component;

[0038] B. Feed zinc oxide into a calcination furnace, calcine it at 980 - 1020 for 30 min, and after cooling to room temperature, crush it into zinc oxide powder with a particle size of 100 - 150 mesh;

[0039] C. Pour hydroxy acrylic resin into a stirring kettle, then add the zinc oxide powder obtained in step B, stir at a speed of 250 - 350 r / min for 10 - 15 min, and then successively add epoxy soybean oil, polyamide wax paste, emulsifying silicone oil, dimethoxy propane, and divinyl dimethyl silane, and stir at a speed of 500 - 600 r / min for 25 - 35 min to obtain a second component;

[0040] D. Pour the first component and the second component into the stirring kettle in sequence, and stir at a speed of 600 - 800 r / min for 30 - 40 min to obtain a first weather - resistant paint liquid.

[0041] A preparation process for a highly weather - resistant corrugated beam guardrail specifically includes the following steps:

[0042] Step 1. Polish the surfaces of the first substrate and the second substrate so that rough surfaces are formed on the surfaces of the first substrate and the second substrate;

[0043] Step 2. Coating the first weather - resistant paint liquid and the second weather - resistant paint liquid with a thickness of 0.4 - 0.5 mm on the surfaces of the first substrate and the second substrate respectively, and then placing them at a temperature of 28 - 32 °C and a relative humidity of 60 - 65% to dry for 6 - 8 min;

[0044] Step 3. Continuously coat the second weather - resistant paint liquid and the third weather - resistant paint liquid with a thickness of 0.2 - 0.3 mm on the coating formed in step 2, and then place them at a temperature of 30 - 35 °C and a relative humidity of 60 - 65% to dry for 5 - 7 min;

[0045] Step 4. Continuously coat the second weather - resistant paint liquid and the third weather - resistant paint liquid with a thickness of 0.5 - 0.7 mm on the coating formed in step 3, and then place them at a temperature of 35 - 40 °C and a relative humidity of 68 - 72% to dry for 5 - 7 min, and then control the temperature to drop to 28 - 32 °C for heat preservation treatment for 10 - 15 min to form a first weather - resistant paint layer and a second weather - resistant paint layer on the surfaces of the first substrate and the second substrate.

[0046] Example 1

[0047] A highly weather-resistant corrugated beam guardrail includes two oppositely arranged columns and a corrugated guardrail plate disposed between the two columns. Among them, the column includes a first base material and a first weather-resistant paint layer provided on the surface of the first base material, and the corrugated guardrail plate includes a second base material and a second weather-resistant paint layer provided on the surface of the second base material. Specifically, the component contents of the first weather-resistant paint layer and the second weather-resistant paint layer are the same, and they are respectively formed by repeatedly coating and drying the first weather-resistant paint liquid and the second weather-resistant paint liquid.

[0048] The first weather-resistant paint liquid is composed of a first component and a second component in a weight ratio of 1:0.24.

[0049] The first component includes the following raw materials in parts by weight: 50 parts of epoxy resin, 32 parts of alkyd resin, 10 parts of zinc phosphate, 3 parts of hydrogenated castor oil, 0.2 part of monoglyceryl laurate, 2 parts of dispersant, 0.5 part of defoamer, 1.5 parts of leveling agent, and 1 part of triethanolamine.

[0050] The second component includes the following raw materials in parts by weight: 70 parts of hydroxy acrylic resin, 27 parts of epoxy soybean oil, 12 parts of zinc oxide, 8 parts of polyamide wax paste, 10 parts of emulsified silicone oil, 5 parts of dimethoxypropane, and 2 parts of divinyldimethylsilane.

[0051] The preparation method of the first weather-resistant paint layer specifically includes the following steps:

[0052] A. Pour the epoxy resin and alkyd resin into a stirring kettle, stir at a speed of 200 r / min for 10 min, then add zinc phosphate, stir at a speed of 500 r / min for 15 min, then add triethanolamine, dispersant, monoglyceryl laurate, and leveling agent, and continue to stir for 18 min while keeping the speed unchanged. Finally, add the defoamer and stir at a speed of 600 r / min for 35 min to obtain the first component;

[0053] B. Feed the zinc oxide into a calcining furnace, calcine at 980 for 30 min, cool to room temperature, and crush it into zinc oxide powder with a particle size of 100 mesh;

[0054] C. Pour the hydroxy acrylic resin into a stirring kettle, then add the zinc oxide powder obtained in step B, stir at a speed of 250 r / min for 15 min, then sequentially add epoxy soybean oil, polyamide wax paste, emulsified silicone oil, dimethoxypropane, and divinyldimethylsilane, and stir at a speed of 500 r / min for 35 min to obtain the second component;

[0055] D. Pour the first component and the second component into a stirring kettle in sequence, and stir at a speed of 600 r / min for 40 min to obtain the first weather-resistant paint liquid.

[0056] The preparation process of a highly weather-resistant corrugated beam guardrail specifically includes the following steps:

[0057] Step 1: Grind the surfaces of the first substrate and the second substrate so that rough surfaces are formed on the surfaces of the first substrate and the second substrate;

[0058] Step 2: Coat a first weather-resistant paint solution and a second weather-resistant paint solution with a thickness of 0.4 mm on the surfaces of the first substrate and the second substrate respectively, and then place them at a temperature of 28°C and a relative humidity of 60% for drying for 8 min;

[0059] Step 3: Continuously coat a second weather-resistant paint solution and a third weather-resistant paint solution with a thickness of 0.2 mm on the coating formed in Step 2, and then place them at a temperature of 30°C and a relative humidity of 60% for drying for 7 min;

[0060] Step 4: Continuously coat a second weather-resistant paint solution and a third weather-resistant paint solution with a thickness of 0.5 mm on the coating formed in Step 3, and then place them at a temperature of 35°C and a relative humidity of 68% for drying for 7 min. Then, control the temperature to drop to 28°C for heat preservation treatment for 15 min to form a first weather-resistant paint layer and a second weather-resistant paint layer on the surfaces of the first substrate and the second substrate.

[0061] Example 2

[0062] A highly weather-resistant corrugated beam guardrail includes two oppositely arranged columns and a corrugated guardrail plate arranged between the two columns. Among them, the column includes a first substrate and a first weather-resistant paint layer arranged on the surface of the first substrate, and the corrugated guardrail plate includes a second substrate and a second weather-resistant paint layer arranged on the surface of the second substrate. Specifically, the component contents of the first weather-resistant paint layer and the second weather-resistant paint layer are the same, and they are respectively formed by repeatedly coating and drying a first weather-resistant paint solution and a second weather-resistant paint solution.

[0063] The first weather-resistant paint solution is composed of a first component and a second component in a weight ratio of 1:0.28.

[0064] The first component includes the following raw materials in parts by weight: 60 parts of epoxy resin, 25 parts of alkyd resin, 15 parts of zinc phosphate, 2 parts of hydrogenated castor oil, 0.3 part of monoglyceryl laurate, 1 part of dispersant, 1 part of defoamer, 1 part of leveling agent, and 3 parts of triethanolamine.

[0065] The second component includes the following raw materials in parts by weight: 80 parts of hydroxy acrylic resin, 22 parts of epoxy soybean oil, 16 parts of zinc oxide, 5 parts of polyamide wax paste, 15 parts of emulsifying silicone oil, 3 parts of dimethoxypropane, and 4 parts of divinyldimethylsilane.

[0066] The preparation method of the first weather-resistant paint layer specifically includes the following steps:

[0067] A. Pour the epoxy resin and alkyd resin into a stirring kettle, stir at a speed of 300 r / min for 8 min, then add zinc phosphate, stir at a speed of 600 r / min for 10 min, then add triethanolamine, dispersant, monoglyceryl laurate, and leveling agent, and continue to stir for 22 min while keeping the speed unchanged. Finally, add an antifoaming agent and stir at a speed of 800 r / min for 25 min to obtain the first component;

[0068] B. Feed zinc oxide into a calcining furnace, calcine at 1020 for 30 min, cool to room temperature, and crush it into zinc oxide powder with a particle size of 120 mesh;

[0069] C. Pour the hydroxyl acrylic resin into a stirring kettle, then add the zinc oxide powder obtained in step B, stir at a speed of 350 r / min for 10 min, then successively add epoxy soybean oil, polyamide wax paste, emulsifying silicone oil, dimethoxypropane, and divinyldimethylsilane, and stir at a speed of 600 r / min for 25 min to obtain the second component;

[0070] D. Pour the first component and the second component into a stirring kettle in sequence, stir at a speed of 800 r / min for 30 min to obtain the first weather-resistant paint liquid.

[0071] A preparation process for a highly weather-resistant corrugated beam guardrail specifically includes the following steps:

[0072] Step 1. Grind the surfaces of the first substrate and the second substrate so that rough surfaces are formed on the surfaces of the first substrate and the second substrate;

[0073] Step 2. Coating the first weather-resistant paint liquid and the second weather-resistant paint liquid with a thickness of 0.5 mm on the surfaces of the first substrate and the second substrate respectively, and then drying at a temperature of 32 °C and a relative humidity of 65% for 6 min;

[0074] Step 3. Continuously coat the second weather-resistant paint liquid and the third weather-resistant paint liquid with a thickness of 0.3 mm on the coating formed in step 2, and then dry at a temperature of 35 °C and a relative humidity of 65% for 5 min;

[0075] Step 4. Continuously coat the second weather-resistant paint liquid and the third weather-resistant paint liquid with a thickness of 0.7 mm on the coating formed in step 3, and then dry at a temperature of 40 °C and a relative humidity of 72% for 5 min. Then control the temperature to drop to 32 °C and keep it warm for 10 min to form a first weather-resistant paint layer and a second weather-resistant paint layer on the surfaces of the first substrate and the second substrate.

[0076] Example 3

[0077] A highly weather-resistant corrugated beam guardrail, comprising two oppositely arranged columns and a corrugated guardrail plate disposed between the two columns. Specifically, the column includes a first base material and a first weather-resistant paint layer provided on the surface of the first base material, and the corrugated guardrail plate includes a second base material and a second weather-resistant paint layer provided on the surface of the second base material. Specifically, the component contents of the first weather-resistant paint layer and the second weather-resistant paint layer are the same, and are respectively formed by repeatedly coating and drying the first weather-resistant paint liquid and the second weather-resistant paint liquid.

[0078] The first weather-resistant paint liquid is composed of a first component and a second component in a weight ratio of 1:0.25.

[0079] The first component includes the following raw materials in parts by weight: 55 parts of epoxy resin, 28 parts of alkyd resin, 12 parts of zinc phosphate, 2.5 parts of hydrogenated castor oil, 0.25 part of monoglyceryl laurate, 1.5 parts of dispersant, 0.8 part of defoamer, 1.2 parts of leveling agent, and 2 parts of triethanolamine.

[0080] The second component includes the following raw materials in parts by weight: 75 parts of hydroxy acrylic resin, 25 parts of epoxy soybean oil, 14 parts of zinc oxide, 6 parts of polyamide wax paste, 12 parts of emulsified silicone oil, 4 parts of dimethoxypropane, and 3 parts of divinyldimethylsilane.

[0081] The preparation method of the first weather-resistant paint layer specifically includes the following steps:

[0082] A. Pour the epoxy resin and the alkyd resin into a stirring kettle, stir at a speed of 250 r / min for 9 min, then add zinc phosphate, stir at a speed of 550 r / min for 12 min, then add triethanolamine, dispersant, monoglyceryl laurate, and leveling agent, and continue to stir for 20 min while keeping the speed unchanged. Finally, add the defoamer and stir at a speed of 700 r / min for 30 min to obtain the first component;

[0083] B. Feed the zinc oxide into a calcining furnace, calcine at 1000 for 30 min, cool to room temperature, and crush it into zinc oxide powder with a particle size of 150 mesh;

[0084] C. Pour the hydroxy acrylic resin into a stirring kettle, then add the zinc oxide powder obtained in step B, stir at a speed of 300 r / min for 12 min, then sequentially add epoxy soybean oil, polyamide wax paste, emulsified silicone oil, dimethoxypropane, and divinyldimethylsilane, and stir at a speed of 550 r / min for 30 min to obtain the second component;

[0085] D. Pour the first component and the second component into a stirring kettle in sequence, and stir at a speed of 700 r / min for 35 min to obtain the first weather-resistant paint liquid.

[0086] A preparation process for a highly weather-resistant corrugated beam guardrail, specifically including the following steps:

[0087] Step 1: Grind the surfaces of the first substrate and the second substrate so that rough surfaces are formed on the surfaces of the first substrate and the second substrate;

[0088] Step 2: Coat a first weather-resistant paint solution and a second weather-resistant paint solution with a thickness of 0.45 mm on the surfaces of the first substrate and the second substrate respectively, and then place them at a temperature of 30 °C and a relative humidity of 62% and dry for 7 minutes;

[0089] Step 3: Continuously coat a second weather-resistant paint solution and a third weather-resistant paint solution with a thickness of 0.25 mm on the coating formed in Step 2, and then place them at a temperature of 32 °C and a relative humidity of 62% and dry for 6 minutes;

[0090] Step 4: Continuously coat a second weather-resistant paint solution and a third weather-resistant paint solution with a thickness of 0.6 mm on the coating formed in Step 3, and then place them at a temperature of 38 °C and a relative humidity of 70% and dry for 6 minutes. Then control the temperature to drop to 30 °C and keep it warm for 12 minutes to form a first weather-resistant paint layer and a second weather-resistant paint layer on the surfaces of the first substrate and the second substrate.

[0091] Perform corresponding tests on the columns prepared in Example 3, and the specific results are referred to Figures 1 to 2 as shown.

[0092] Through Figure 1 and Figure 2 the test results show that the corrugated beam guardrail prepared in this application has good mechanical properties, with a lower yield strength of 280 MPa, a tensile strength of 410 MPa, and an elongation at break of 40 MPa, meeting the usage requirements of road guardrails. Specifically, by limiting the raw material composition of the weather-resistant paint layer, the weather resistance and anti-aging properties of the prepared corrugated beam guardrail are greatly enhanced. Among them, the salt spray corrosion resistance reaches 1500 hours, and the damp heat resistance reaches 1000 h, extending the service life of the corrugated beam guardrail. Further limit the preparation process of the corrugated beam guardrail. Through the composition of grinding, multiple coatings, and multiple drying processes, the weather-resistant paint layer is stably attached to the product surface. The above process replaces the galvanizing treatment and spraying treatment in the prior art, without molten zinc ingots and aluminum ingots, reducing heat loss, reducing waste gas and dust emissions, and replacing pickling, without hydrogen embrittlement and pollution emissions; at the same time, the weather-resistant paint solution can directly renovate the original two-wave and three-wave old guardrails, solving many problems such as the difficult treatment of zinc layers, coatings, and dust on the surface of old guardrails and the non-returnability of steel mills.

[0093] The above are only the preferred embodiments of the present invention, and thus the scope of implementation of the present invention cannot be limited thereby. That is, equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the content of the specification should still fall within the scope covered by the patent of the present invention.

Claims

1. A highly weather-resistant corrugated beam guardrail, comprising two oppositely disposed upright posts and a corrugated guardrail plate disposed between the two upright posts, characterized in that: The column comprises a first substrate and a first weather-resistant paint layer arranged on the surface of the first substrate, the corrugated guardrail comprises a second substrate and a second weather-resistant paint layer arranged on the surface of the second substrate, the first weather-resistant paint layer and the second weather-resistant paint layer have the same component content, and are respectively formed by coating and drying the first weather-resistant paint liquid and the second weather-resistant paint liquid multiple times, and the first weather-resistant paint liquid is composed of the first component and the second component in a weight ratio of 1:0.24-0.28, The first component includes the following raw materials in parts by weight: 50-60 parts of epoxy resin, 25-32 parts of alkyd resin, 10-15 parts of zinc phosphate, 2-3 parts of anti-settling agent, 0.2-0.3 parts of monolaurin, 1-2 parts of dispersant, 0.5-1 parts of defoamer, 1-1.5 parts of leveling agent, and 1-3 parts of triethanolamine; The second component comprises the following raw materials in parts by weight: 70-80 parts of hydroxy acrylic resin, 22-27 parts of epoxy soybean oil, 12-16 parts of zinc oxide, 5-8 parts of polyamide wax slurry, 10-15 parts of emulsified silicone oil, 3-5 parts of dimethoxypropane and 2-4 parts of divinyldimethylsilane.

2. A high weather-resistant corrugated beam guardrail according to claim 1, characterized in that: The dispersant is composed of vinyl bisstearamide, sorbitan fatty acid ester and polyethylene glycol in a mass ratio of 1:1:

2.

3. The high weather-resistant corrugated beam guardrail according to claim 1, characterized in that: The anti-settling agent is hydrogenated castor oil.

4. The high weather-resistant corrugated beam guardrail according to claim 3, characterized in that: The leveling agent is composed of polydimethylsiloxane and KMT-5519 leveling agent in a mass ratio of 1:

1.

5. The high weather-resistant corrugated beam guardrail according to claim 1, characterized in that: The method for preparing the first weather-resistant paint layer specifically comprises the following steps: A. Pour the epoxy resin and the alkyd resin into a stirring kettle, stir at a speed of 200-300 r / min for 8-10 min, then add zinc phosphate, stir at a speed of 500-600 r / min for 10-15 min, then add triethanolamine, dispersant, monolaurin, and leveling agent, keep the speed unchanged, continue stirring for 18-22 min, finally add the defoamer, stir at a speed of 600-800 r / min for 25-35 min, and obtain the first component; B. The zinc oxide is fed into a calcining furnace, calcined at 980-1020°C for 30 min, cooled to room temperature, and crushed into zinc oxide powder with a particle size of 100-150 mesh; C. Pour the hydroxy acrylic resin into a stirring kettle, add the zinc oxide powder obtained in step B, stir for 10-15 min at a speed of 250-350 r / min, then add epoxy soybean oil, polyamide wax slurry, emulsified silicone oil, dimethoxypropane, and divinyldimethylsilane in sequence, stir for 25-35 min at a speed of 500-600 r / min, to obtain the second component; D. Pour the first component and the second component into the stirring kettle in sequence, stir at a speed of 600-800 r / min for 30-40 minutes to obtain the first weather-resistant paint liquid.

6. The preparation process of a highly weather-resistant corrugated beam guardrail according to claim 1, characterized in that: The specific steps include: Step 1, grinding the surfaces of the first substrate and the second substrate to form rough surfaces; Step 2, coating the first weather-resistant paint solution and the second weather-resistant paint solution on the surface of the first substrate and the second substrate respectively, and then drying them at a temperature of 28-32° C. and a relative humidity of 60-65% for 6-8 minutes; Step 3, continuously coating the coating formed in step 2 with a second weather-resistant paint solution and a third weather-resistant paint solution, and then drying the coating at a temperature of 30-35° C. and a relative humidity of 60-65% for 5-7 minutes; Step 4, continue to apply the second weather-resistant paint liquid and the third weather-resistant paint liquid on the coating formed in step 3, then place it at a temperature of 35-40°C and a relative humidity of 68-72%, and dry it for 5-7 minutes, then control the temperature to drop to 28-32°C, and keep it warm for 10-15 minutes to form a first weather-resistant paint layer and a second weather-resistant paint layer on the surface of the first substrate and the second substrate.

7. The preparation process of a highly weather-resistant corrugated beam guardrail according to claim 6, characterized in that: In step 2, the coating thickness of the first weather-resistant paint liquid and the second weather-resistant paint liquid is 0.4-0.5 mm.

8. The process for preparing a highly weather-resistant corrugated beam guardrail according to claim 6, characterized in that: In step 3, the coating thickness of the first weather-resistant paint liquid and the second weather-resistant paint liquid is 0.2-0.3 mm.

9. The process for preparing a highly weather-resistant corrugated beam guardrail according to claim 6, characterized in that: In step 4, the coating thickness of the first weather-resistant paint liquid and the second weather-resistant paint liquid is 0.5-0.7 mm.

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