CN109161231B - Hydrophobic composite material - Google Patents
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Abstract
The invention discloses a hydrophobic composite material, and a hydrophobic composite coating prepared from the hydrophobic composite material has a larger water drop contact angle and better hydrophobicity and corrosion resistance. And the preparation method has simple process and low production cost, and is suitable for industrial production. The hydrophobic composite material can be coated on various metal materials, and the obtained metal materials are suitable for the fields of petrochemical industry, automobiles, ships, engineering machinery, electric power industry and the like.
Description
Technical Field
The invention relates to the technical field of steel, in particular to a hydrophobic composite material.
Background
CN201510552308.1 discloses a hydrophobic anticorrosion Dacromet coating and a preparation method thereof, belonging to the technical field of metal anticorrosion. The paint consists of surface modified flaky zinc and aluminum powder, an organic solvent, a film forming assistant, hydrophobic nano sol and hydrophobic nano powder; in the total weight of 100%, the zinc powder accounts for 18-23%, the aluminum powder accounts for 2-4.5%, the hydrophobic nano sol accounts for 34-42%, the hydrophobic nano powder accounts for 0.8-3.5%, the film-forming assistant accounts for 0.4-0.9%, and the solvent accounts for 33-40%. According to the invention, the hydrophobic nano sol and the nano powder are adopted, so that the surface of the Dacromet coating presents hydrophobicity, and the corrosion resistance is improved. The technical scheme is that the zinc-aluminum powder modified by organic silicon is dispersed into an organic solvent, and hydrophobic nano sol and a film-forming auxiliary agent are added to obtain the hydrophobic anticorrosive chromium-free Dacromet coating. But the hydrophobicity is not yet ideal.
Disclosure of Invention
Aiming at the technical defects, the invention aims to provide the hydrophobic composite material, and the hydrophobic composite coating prepared from the hydrophobic composite material has a larger water drop contact angle and has better hydrophobicity and corrosion resistance. The invention also aims to provide a preparation method of the hydrophobic composite material, which has the advantages of simple process and low production cost and is suitable for industrial production. The invention also provides application of the coating material with strong adhesive force on metal materials, the coating material can be coated on various metal materials, and the obtained metal materials are suitable for the fields of petrochemical industry, automobiles, ships, engineering machinery, electric power industry and the like.
In order to achieve the above object, the present invention provides a hydrophobic composite material, which contains, in mass percent: 12 to 18 percent of aluminum powder, 5 to 9 percent of rare earth modified alloy powder I, 0.6 to 1.2 percent of rare earth modified alloy powder II, 2 to 6 percent of chromate, 2 to 6 percent of molybdate, 18 to 22 percent of cyclohexanol, 2 to 5 percent of calcium dodecylbenzene sulfonate, 2 to 4 percent of phenethyl polyoxyethylene ether, 4 to 8 percent of rare earth modified inorganic material powder and the balance of water; wherein, the first rare earth modified alloy powder is a mixture of zinc powder, neodymium powder, yttrium powder and copper powder; and the second rare earth modified alloy powder is a mixture of silicon powder, erbium powder, yttrium powder and aluminum powder.
The invention also provides a preparation method of the hydrophobic composite coating, which comprises the following steps: immersing the cleaned metal material into the hydrophobic composite material for 10-20 min, taking out, standing for 1-2 h, preserving heat at 70-120 ℃ for 20-35 min, and preserving heat at high temperature of 250-350 ℃ for 40-55 min to obtain a hydrophobic composite coating; wherein the hydrophobic composite comprises: 12 to 18 percent of aluminum powder, 5 to 9 percent of rare earth modified alloy powder I, 0.6 to 1.2 percent of rare earth modified alloy powder II, 2 to 6 percent of chromate, 2 to 6 percent of molybdate, 18 to 22 percent of cyclohexanol, 2 to 5 percent of calcium dodecylbenzene sulfonate, 2 to 4 percent of phenethyl polyoxyethylene ether, 4 to 8 percent of rare earth modified inorganic material powder and the balance of water; wherein, the first rare earth modified alloy powder is a mixture of zinc powder, neodymium powder, yttrium powder and copper powder; and the second rare earth modified alloy powder is a mixture of silicon powder, erbium powder, yttrium powder and aluminum powder.
Furthermore, the present invention provides a method for preparing the hydrophobic composite material, which comprises the following steps: weighing the following raw materials according to the proportion and uniformly mixing: by mass percent, 12 to 18 percent of aluminum powder, 5 to 9 percent of rare earth modified alloy powder I, 0.6 to 1.2 percent of rare earth modified alloy powder II, 2 to 6 percent of chromate, 2 to 6 percent of molybdate, 18 to 22 percent of cyclohexanol, 2 to 5 percent of calcium dodecyl benzene sulfonate, 2 to 4 percent of phenethyl polyoxyethylene ether, 4 to 8 percent of rare earth modified inorganic material powder and the balance of water; wherein, the first rare earth modified alloy powder is a mixture of zinc powder, neodymium powder, yttrium powder and copper powder; and the second rare earth modified alloy powder is a mixture of silicon powder, erbium powder, yttrium powder and aluminum powder.
Through the technical scheme, the hydrophobic composite coating prepared from the hydrophobic composite material has a large water drop contact angle and has good hydrophobicity and corrosion resistance. And the preparation method has simple process and low production cost, and is suitable for industrial production. The invention also provides application of the coating material with strong adhesive force on metal materials, the coating material can be coated on various metal materials, and the obtained metal materials are suitable for the fields of petrochemical industry, automobiles, ships, engineering machinery, electric power industry and the like.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a texture map of a composite coating obtained from the hydrophobic composite of example 1.
Detailed Description
The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
The invention provides a hydrophobic composite material, which comprises the following components in percentage by mass: 12 to 18 percent of aluminum powder, 5 to 9 percent of rare earth modified alloy powder I, 0.6 to 1.2 percent of rare earth modified alloy powder II, 2 to 6 percent of chromate, 2 to 6 percent of molybdate, 18 to 22 percent of cyclohexanol, 2 to 5 percent of calcium dodecylbenzene sulfonate, 2 to 4 percent of phenethyl polyoxyethylene ether, 4 to 8 percent of rare earth modified inorganic material powder and the balance of water; wherein, the first rare earth modified alloy powder is a mixture of zinc powder, neodymium powder, yttrium powder and copper powder; and the second rare earth modified alloy powder is a mixture of silicon powder, erbium powder, yttrium powder and aluminum powder.
Through the technical scheme, the hydrophobic composite coating prepared from the hydrophobic composite material has a large water drop contact angle and has good hydrophobicity and corrosion resistance. And the preparation method has simple process and low production cost, and is suitable for industrial production. The invention also provides application of the coating material with strong adhesive force on metal materials, the coating material can be coated on various metal materials, and the obtained metal materials are suitable for the fields of petrochemical industry, automobiles, ships, engineering machinery, electric power industry and the like.
In the above technical solution, the content of each component in the first rare earth modified alloy powder can be adjusted in a wide range, and in order to obtain a hydrophobic composite material with a large water droplet contact angle and good hydrophobicity and corrosion resistance, in a preferred embodiment of the present invention, the first rare earth modified alloy powder comprises the following components in percentage by weight: 36 to 39 percent of zinc powder, 0.04 to 0.08 percent of neodymium powder, 0.03 to 0.06 percent of yttrium powder and the balance of copper powder.
In the above technical solution, the contents of the components in the second rare earth modified alloy powder can be adjusted within a wide range, and in order to obtain a hydrophobic composite material with a large water droplet contact angle and good hydrophobicity and corrosion resistance, in a preferred embodiment of the present invention, the second rare earth modified alloy powder contains the following components in percentage by weight: 10 to 13 percent of silicon powder, 0.05 to 0.09 percent of erbium powder, 0.03 to 0.06 percent of yttrium powder and the balance of aluminum powder.
In the above technical solution, the rare earth modified inorganic material powder may be ceramic powder or modified ceramic powder, and in order to obtain a hydrophobic composite material having a large water droplet contact angle and good hydrophobicity and corrosion resistance, in a preferred embodiment of the present invention, the rare earth modified inorganic material powder comprises the following components in percentage by weight: the rare earth modified inorganic material powder comprises the following components in percentage by weight: al (Al)2O3 23％～28％，CaO 0.3％～0.8％，ZnO 0.3％～0.5％，BaO 3％～5％，MnO 5％～9％，Yb2O3 3％～6％，Fe2O3 0.5％～0.9％，TiO2 1％～3％，Er2O3 0.03％～0.08％，K2O 0.4％～0.9％，B2O30.3-0.5%, and the balance of SiO2。
In the technical scheme, the particle size of the zinc powder can be adjusted in a wide range, and in order to obtain the hydrophobic composite material with a large water drop contact angle and good hydrophobicity and corrosion resistance, in a preferred embodiment of the invention, the average particle size of the aluminum powder is 6-10 micrometers.
In the technical scheme, the particle size of the first rare earth modified alloy powder can be adjusted in a wide range, and in order to obtain the hydrophobic composite material with a large water drop contact angle and good hydrophobicity and corrosion resistance, in a preferred embodiment of the invention, the average particle size of the first rare earth modified alloy powder is 6-10 micrometers.
In the technical scheme, the particle size of the second rare earth modified alloy powder can be adjusted in a wide range, and in order to obtain the hydrophobic composite material with a large water drop contact angle and good hydrophobicity and corrosion resistance, in a preferred embodiment of the invention, the average particle size of the second rare earth modified alloy powder is 10-16 micrometers.
In the above technical scheme, the average particle size of the rare earth modified inorganic material powder can be adjusted within a wide range, and in order to obtain a hydrophobic composite material with a large water droplet contact angle and good hydrophobicity and corrosion resistance, in a preferred embodiment of the present invention, the average particle size of the rare earth modified inorganic material powder is 10 to 16 micrometers.
The invention also provides a preparation method of the hydrophobic composite coating, which comprises the following steps: immersing the cleaned metal material into the hydrophobic composite material for 10-20 min, taking out, standing for 1-2 h, preserving heat at 70-120 ℃ for 20-35 min, and preserving heat at high temperature of 250-350 ℃ for 40-55 min to obtain a hydrophobic composite coating; wherein the hydrophobic composite comprises: 12 to 18 percent of aluminum powder, 5 to 9 percent of rare earth modified alloy powder I, 0.6 to 1.2 percent of rare earth modified alloy powder II, 2 to 6 percent of chromate, 2 to 6 percent of molybdate, 18 to 22 percent of cyclohexanol, 2 to 5 percent of calcium dodecylbenzene sulfonate, 2 to 4 percent of phenethyl polyoxyethylene ether, 4 to 8 percent of rare earth modified inorganic material powder and the balance of water; wherein, the first rare earth modified alloy powder is a mixture of zinc powder, neodymium powder, yttrium powder and copper powder; and the second rare earth modified alloy powder is a mixture of silicon powder, erbium powder, yttrium powder and aluminum powder.
Through the technical scheme, the hydrophobic composite coating prepared from the hydrophobic composite material has a large water drop contact angle and has good hydrophobicity and corrosion resistance. And the preparation method has simple process and low production cost, and is suitable for industrial production. The invention also provides application of the coating material with strong adhesive force on metal materials, the coating material can be coated on various metal materials, and the obtained metal materials are suitable for the fields of petrochemical industry, automobiles, ships, engineering machinery, electric power industry and the like.
Among them, the cleaning method of the metal material can be selected from a wide range as long as the metal surface can be cleaned without contamination. In a preferred embodiment of the present invention, in order to provide the cleaning efficiency of the metal material and obtain the composite coating with larger water drop contact angle, better hydrophobicity and corrosion resistance, in a preferred embodiment of the present invention, the cleaning method of the metal material comprises:
taking the metal material after polishing and derusting, polishing by using sand paper, cleaning by using acetone, and drying; and then, the metal material is placed at the temperature of 130-150 ℃ for heat preservation for 20-40 min and then air-cooled.
In the above technical solution, in a more preferred embodiment of the present invention, the thickness of the composite coating layer is 8 to 11 μm.
Furthermore, the present invention provides a method for preparing the hydrophobic composite material, which comprises the following steps: weighing the following raw materials according to the proportion and uniformly mixing: by mass percent, 12 to 18 percent of aluminum powder, 5 to 9 percent of rare earth modified alloy powder I, 0.6 to 1.2 percent of rare earth modified alloy powder II, 2 to 6 percent of chromate, 2 to 6 percent of molybdate, 18 to 22 percent of cyclohexanol, 2 to 5 percent of calcium dodecyl benzene sulfonate, 2 to 4 percent of phenethyl polyoxyethylene ether, 4 to 8 percent of rare earth modified inorganic material powder and the balance of water; wherein, the first rare earth modified alloy powder is a mixture of zinc powder, neodymium powder, yttrium powder and copper powder; and the second rare earth modified alloy powder is a mixture of silicon powder, erbium powder, yttrium powder and aluminum powder.
Through the technical scheme, the hydrophobic composite coating prepared from the hydrophobic composite material has a large water drop contact angle and has good hydrophobicity and corrosion resistance. And the preparation method has simple process and low production cost, and is suitable for industrial production. The invention also provides application of the coating material with strong adhesive force on metal materials, the coating material can be coated on various metal materials, and the obtained metal materials are suitable for the fields of petrochemical industry, automobiles, ships, engineering machinery, electric power industry and the like.
In the above technical solution, the content of each component in the first rare earth modified alloy powder can be adjusted in a wide range, and in order to obtain a hydrophobic composite material with a large water droplet contact angle and good hydrophobicity and corrosion resistance, in a preferred embodiment of the present invention, the first rare earth modified alloy powder comprises the following components in percentage by weight: 36 to 39 percent of zinc powder, 0.04 to 0.08 percent of neodymium powder, 0.03 to 0.06 percent of yttrium powder and the balance of copper powder.
In the above technical solution, the contents of the components in the second rare earth modified alloy powder can be adjusted within a wide range, and in order to obtain a hydrophobic composite material with a large water droplet contact angle and good hydrophobicity and corrosion resistance, in a preferred embodiment of the present invention, the second rare earth modified alloy powder contains the following components in percentage by weight: 10 to 13 percent of silicon powder, 0.05 to 0.09 percent of erbium powder, 0.03 to 0.06 percent of yttrium powder and the balance of aluminum powder.
In the above technical solution, the rare earth modified inorganic material powder may be ceramic powder or modified ceramic powder, and in order to obtain a hydrophobic composite material having a large water droplet contact angle and good hydrophobicity and corrosion resistance, in a preferred embodiment of the present invention, the rare earth modified inorganic material powder comprises the following components in percentage by weight: al (Al)2O3 23％～28％，CaO 0.3％～0.8％，ZnO 0.3％～0.5％，BaO 3％～5％，MnO 5％～9％，Yb2O3 3％～6％，Fe2O3 0.5％～0.9％，TiO2 1％～3％，Er2O3 0.03％～0.08％，K2O 0.4％～0.9％，B2O30.3-0.5%, and the balance of SiO2。
In the above technical solution, the first rare earth modified alloy powder can be obtained through a variety of ways, and in order to obtain the first rare earth modified alloy powder with an ideal particle size range, in a preferred embodiment of the present invention, the first rare earth modified alloy powder is prepared by the following method: weighing zinc powder, neodymium powder, yttrium powder and copper powder according to the mass ratio, and smelting at 1230-1270 ℃ to obtain alloy liquid; alloy liquid is injected into a tundish above an atomizing nozzle, the alloy liquid flows out from a bottom hole of the tundish, meets high-speed airflow when passing through the nozzle and is atomized into fine droplets, and the atomized droplets are rapidly solidified into alloy powder in a closed atomizing cylinder.
In a more preferred embodiment of the present invention, in order to improve the preparation efficiency, the pressure of the atomizing gas is preferably 5 to 8 MPa; the flow rate of the alloy liquid is 2-4 kg/min; the injection temperature of the alloy liquid is 1200-1230 ℃; the atomization angle is 31-33 degrees.
In the technical scheme, the required rare earth modified alloy powder I can be obtained only by combining the preparation process and the process parameter range according to the specified raw material proportion. The specific change of parameters such as the atomizing gas pressure, the alloy liquid flow, the alloy liquid injection temperature, the atomizing angle, the smelting temperature and the like only affects the preparation efficiency or the average particle size, and even if so, the average particle size of the obtained rare earth modified alloy powder is within the particle size range.
In the above technical solution, the second rare earth modified alloy powder can be obtained through a variety of ways, and in order to obtain the second rare earth modified alloy powder with an ideal particle size range, in a preferred embodiment of the present invention, the second rare earth modified alloy powder is prepared by the following method: weighing silicon powder, erbium powder, yttrium powder and aluminum powder according to the mass ratio, and smelting at 730-780 ℃ to obtain alloy liquid; alloy liquid is injected into a tundish above an atomizing nozzle, the alloy liquid flows out from a bottom hole of the tundish, meets high-speed airflow when passing through the nozzle and is atomized into fine droplets, and the atomized droplets are rapidly solidified into alloy powder in a closed atomizing cylinder.
In a more preferred embodiment of the present invention, the atomizing gas pressure is 3 to 5 MPa; the flow rate of the alloy liquid is 2-5 kg/min; the injection temperature of the alloy liquid is 730-780 ℃; the atomization angle is 29-31 degrees.
In the technical scheme, the required rare earth modified alloy powder I can be obtained only by combining the preparation process and the process parameter range according to the specified raw material proportion. The specific change of parameters such as the atomizing gas pressure, the alloy liquid flow, the alloy liquid injection temperature, the atomizing angle, the smelting temperature and the like only affects the preparation efficiency or the average particle size, and even if so, the average particle size of the obtained rare earth modified alloy powder is within the particle size range.
In the above technical solution, the rare earth modified inorganic material powder can be obtained through various ways, and in order to obtain the rare earth modified inorganic material powder with an ideal particle size range, in a preferred embodiment of the present invention, Al is weighed according to a mass ratio2O3、CaO、ZnO、BaO、MnO、Yb2O3、Fe2O3、TiO2、Er2O3、K2O、B2O3And SiO2Mixing and crushing the raw materials in a sand mill to obtain powder; and then drying the powder at 120-130 ℃, sieving the dried powder with a screen of 190-210 meshes, sintering the powder in a sintering furnace, and finally crushing the sintered product into powder in a grinding machine.
In a more preferred embodiment of the present invention, the sintering temperature is 1180 to 1220 ℃.
The present invention will be described in detail below by way of examples.
Example 1
A hydrophobic composite material comprises the following components in percentage by weight: 12% of aluminum powder, 5% of rare earth modified alloy powder, 0.6% of rare earth modified alloy powder, 2% of chromate, 2% of molybdate, 18% of cyclohexanol, 2% of calcium dodecylbenzene sulfonate, 2% of phenethyl polyoxyethylene ether, 4% of rare earth modified inorganic material powder and the balance of water. The rare earth modified alloy powder I comprises the following components in percentage by weight: 36% of Zn, 0.04% of Nd, 0.03% of Yb and the balance of copper. The rare earth modified alloy powder II comprises the following components in percentage by weight: 10% of Si, E r 0.05.05% of Yb, 0.03% of Yb and the balance of aluminum. Rare earth modified inorganic material powder: al (Al)2O3 23％，CaO 0.3％，ZnO 0.3％，BaO 3％，MnO 5％，Yb2O3 3％，Fe2O3 0.5％，TiO21％，Er2O3 0.03％，K2O 0.4％，B2O30.3 percent and the balance of SiO 2.
Example 2
A hydrophobic composite material comprises the following components in percentage by weight: 14% of aluminum powder, 7% of rare earth modified alloy powder, 0.9% of rare earth modified alloy powder, 4% of chromate, 4% of molybdate, 20% of cyclohexanol, 4% of calcium dodecylbenzene sulfonate, 3% of phenethyl polyoxyethylene ether, 6% of rare earth modified inorganic material powder and the balance of water. Rare earth modified alloy powderThe weight percentage of the components is as follows: 38% of Zn, 0.06% of Nd, 0.05% of Yb and the balance of copper. The rare earth modified alloy powder II comprises the following components in percentage by weight: 11% of Si, 0.07% of Er, 0.05% of Yb and the balance of aluminum. Rare earth modified inorganic material powder: al (Al)2O3 25％，CaO 0.5％，ZnO 0.4％，BaO 4％，MnO 7％，Yb2O3 5％，Fe2O3 0.7％，TiO22％，Er2O3 0.06％，K2O 0.7％，B2O30.4 percent, and the balance of SiO 2.
Example 3
A hydrophobic composite material comprises the following components in percentage by weight: 18% of aluminum powder, 9% of rare earth modified alloy powder, 1.2% of rare earth modified alloy powder, 6% of chromate, 6% of molybdate, 22% of cyclohexanol, 5% of calcium dodecylbenzene sulfonate, 4% of phenethyl polyoxyethylene ether, 8% of rare earth modified inorganic material powder and the balance of water. The rare earth modified alloy powder I comprises the following components in percentage by weight: 39% of Zn, 0.08% of Nd, 0.06% of Yb and the balance of copper. The rare earth modified alloy powder II comprises the following components in percentage by weight: 13% of Si, 0.09% of Er, 0.06% of Yb and the balance of aluminum. Rare earth modified inorganic material powder: al (Al)2O3 28％，CaO 0.8％，ZnO 0.5％，BaO 5％，MnO 9％，Yb2O3 6％，Fe2O3 0.9％，TiO23％，Er2O3 0.08％，K2O 0.9％，B2O30.5% of SiO in balance2。
Example 4
A hydrophobic composite material comprises the following components in percentage by weight: 11% of aluminum powder, 4% of rare earth modified alloy powder, 0.4% of rare earth modified alloy powder, 16% of chromate, 1% of molybdate, 16% of cyclohexanol, 1% of calcium dodecylbenzene sulfonate, 1% of phenethyl polyoxyethylene ether, 3% of rare earth modified inorganic material powder and the balance of water. The rare earth modified alloy powder I comprises the following components in percentage by weight: 34% of Zn, 0.03% of Nd, 0.02% of Yb and the balance of copper. Rare earth modified alloy powder II, its componentThe weight percentage content of the components is as follows: 7% of Si, 0.04% of Er, 0.02% of Yb and the balance of aluminum. Rare earth modified inorganic material powder: al (Al)2O3 21％，CaO 0.2％，ZnO 0.2％，BaO 2％，MnO 4％，Yb2O3 2％，Fe2O3 0.4％，TiO20.8％，Er2O3 0.02％，K2O 0.3％，B2O30.2% of SiO in balance2。
Example 5
A hydrophobic composite material comprises the following components in percentage by weight: 20% of aluminum powder, 10% of rare earth modified alloy powder, 1.3% of rare earth modified alloy powder, 8% of chromate, 7% of molybdate, 23% of cyclohexanol, 6% of calcium dodecyl benzene sulfonate, 6% of phenethyl polyoxyethylene ether, 9% of rare earth modified inorganic material powder and the balance of water. The rare earth modified alloy powder I comprises the following components in percentage by weight: 42% of Zn, 0.09% of Nd, 0.07% of Yb and the balance of copper. The rare earth modified alloy powder II comprises the following components in percentage by weight: 15% of Si, 0.11% of Er, 0.07% of Yb and the balance of aluminum. Rare earth modified inorganic material powder: al (Al)2O3 30％，CaO 0.9％，ZnO 0.7％，BaO 7％，MnO 11％，Yb2O3 7％，Fe2O3 1％，TiO24％，Er2O3 0.09％，K2O 1％，B2O30.7% of SiO in balance2。
Comparative example 1
The hydrophobic composite material was prepared according to the technical scheme described in chinese patent application CN 201510552308.1.
Application example
Taking the steel plate after polishing and derusting, polishing by using sand paper, cleaning by using acetone, and drying; then, the metal material is placed at 145 ℃ for heat preservation for 30min and then air-cooled;
and (3) respectively soaking the cleaned metal materials into the hydrophobic composite materials in the examples 1-5 and the comparative example 1 for 15min, taking out, standing for 1-2 h, preserving heat at 100 ℃ for 28min, and preserving heat at 300 ℃ for 45min to obtain the composite coating with the dry film thickness of 8-11 mu m.
And (3) detecting the contact angle of water drops of the composite coatings obtained in the application examples 1-5 and the comparative example 1.
The composite coatings obtained in application examples 1 to 5 and comparative example 1 were subjected to a salt spray resistance test: the content of sodium chloride in the used solution is (5 +/-0.1)%, the pH value is 6.5-7.2, and the temperature is (35 +/-2) ° C. The steel plate coated with the composite coating was placed in a salt spray test box for a test time standard for red rust generation.
The results are shown in Table 1.
TABLE 1
| Item | The contact angle of water drop is greater than DEG | Salt spray resistance time/h |
| Example 1 | 145 | 1050 |
| Example 2 | 149 | 1150 |
| Example 3 | 147 | 1100 |
| Example 4 | 142 | 950 |
| Example 5 | 143 | 1000 |
| Comparative example 1 | 142.6 | 900 |
FIG. 1 shows the structure of a composite coating obtained by using the hydrophobic composite material of example 1. Uniform and dense tissue can be seen.
The properties of a coated composite of the invention are shown in table 1. The hydrophobic composite material has good corrosion resistance, good stability and practicability, and can be widely applied to the field of steel products and the like. The preparation method is simple, low in production cost and suitable for industrial production.
The materials comprise aluminum powder and rare earth modified alloy powder, particularly rare earth modified alloy powder I, rare earth modified alloy powder II and rare earth modified inorganic materials, and the materials are subjected to rare earth modification, so that the coating has multi-metal protection capability and enhanced protection capability, and meanwhile, the hydrophobicity of the coating is also improved. The rare earth modified inorganic material is modified by rare earth, so that the hydrophobicity of the material is improved. The rare earth modified inorganic material has good wear resistance, so that the hardness of the coating is ensured. Meanwhile, the rare earth modified inorganic material has good corrosion resistance. The inorganic material is modified by rare earth, so that the brittleness of the material is reduced. The material is added with calcium dodecyl benzene sulfonate, phenethyl polyoxyethylene ether and the like, so that the bonding strength of the material is improved, and the corrosion resistance of the coating is improved. The aluminum powder, the rare earth modified alloy powder and the rare earth modified inorganic material are uniformly distributed in the solution, so that the compactness of the coating is improved, and the salt spray resistance time of the coating is prolonged. The aluminum powder, the rare earth modified brass alloy powder, the rare earth modified aluminum alloy powder and the rare earth modified inorganic material in the coating are mutually overlapped to form a coating, so that the corrosion route is zigzag and prolonged, and the corrosion resistance of the material is improved.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (5)
1. A hydrophobic composite, characterized in that the hydrophobic composite comprises, in mass percent: 12 to 18 percent of aluminum powder, 5 to 9 percent of rare earth modified alloy powder I, 0.6 to 1.2 percent of rare earth modified alloy powder II, 2 to 6 percent of chromate, 2 to 6 percent of molybdate, 18 to 22 percent of cyclohexanol, 2 to 5 percent of calcium dodecylbenzene sulfonate, 2 to 4 percent of phenethyl polyoxyethylene ether, 4 to 8 percent of rare earth modified inorganic material powder and the balance of water;
wherein, the first rare earth modified alloy powder is a mixture of zinc powder, neodymium powder, yttrium powder and copper powder; the second rare earth modified alloy powder is a mixture of silicon powder, erbium powder, yttrium powder and aluminum powder; wherein, the weight percentage of each component in the rare earth modified alloy powder I is as follows: 36 to 39 percent of zinc powder, 0.04 to 0.08 percent of neodymium powder, 0.03 to 0.06 percent of yttrium powder and the balance of copper powder; wherein the rare earth modified alloy powder II comprises the following components in percentage by weight: 10 to 13 percent of silicon powder, 0.05 to 0.09 percent of erbium powder, 0.03 to 0.06 percent of yttrium powder and the balance of aluminum powder; the rare earth modified inorganic material powder comprises the following components in percentage by weight: al (Al)2O323％～28％，CaO 0.3%～0.8％，ZnO 0.3%～0.5％，BaO 3%～5％，MnO 5%～9％，Yb2O33%～6％，Fe2O3 0.5%～0.9％， TiO2 1%～3％，Er2O30.03%～0.08％， K2O 0.4%～0.9％，B2O30.3-0.5%, and the balance of SiO2。
2. The hydrophobic composite of claim 1, wherein the aluminum powder has an average particle size of 6 to 10 microns.
3. The hydrophobic composite material as claimed in claim 1, wherein the average particle size of the first rare earth modified alloy powder is 6-10 μm.
4. The hydrophobic composite material according to claim 1, wherein the average particle size of the second rare earth modified alloy powder is 10-16 microns.
5. The hydrophobic composite material according to claim 1, wherein the average particle size of the rare earth modified inorganic material powder is 10-16 μm.
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| JP4195936B2 (en) * | 2004-03-17 | 2008-12-17 | 独立行政法人産業技術総合研究所 | Reflective dimmer with a diffusive reflective surface |
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| CN101045828A (en) * | 2006-07-03 | 2007-10-03 | 张义纲 | Phosphate film-coated powder and preparation method thereof |
| CN101880485B (en) * | 2010-07-09 | 2012-02-29 | 重庆航利实业有限责任公司 | Rare-earth sol modified composite zinc-aluminum low-temperature sintered coating slurry |
| CN102464902B (en) * | 2010-11-16 | 2015-11-25 | 北京中科三环高技术股份有限公司 | A kind of surface treatment method of chromium spelter coating of Nd-Fe-Bo permanent magnet material |
| CN102604448A (en) * | 2012-01-20 | 2012-07-25 | 北京北矿锌业有限责任公司 | Material used for metal anti-corrosion coating |
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| KR100599892B1 (en) * | 1998-11-10 | 2006-07-13 | 유티씨 퓨얼 셀즈, 엘엘씨 | Inhibition of carbon deposition on fuel gas steam reformer walls |
| JP4195936B2 (en) * | 2004-03-17 | 2008-12-17 | 独立行政法人産業技術総合研究所 | Reflective dimmer with a diffusive reflective surface |
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