CN112210806B - Anti-corrosion steel wire with molybdenum disulfide coating and preparation process thereof - Google Patents
Anti-corrosion steel wire with molybdenum disulfide coating and preparation process thereof Download PDFInfo
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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Abstract
The invention discloses an anticorrosive steel wire with a molybdenum disulfide coating and a preparation process thereof. According to the invention, through the arrangement of multiple structures, components and preparation processes on the outer surface of the steel wire, the adhesion between the anticorrosion structure and the steel wire is better, the corrosion acceleration caused by the reaction caused by the contact with the external environment can be avoided, the anticorrosion capability of the steel wire is realized, the strength, the mechanical property and the like of the manufactured steel wire are improved, and the steel wire is widely applicable.
Description
Technical Field
The invention relates to the field of corrosion prevention, in particular to a corrosion-resistant steel wire with a molybdenum disulfide coating and a preparation process thereof.
Background
The corrosion problem is spread in various fields of national economy, is a problem commonly existing all over the world, and all places using metal materials have corrosion in different degrees, and the corrosion of the metal can reduce the mechanical properties of the metal materials, such as strength, plasticity, toughness and the like, so that the leakage of pipelines, the damage of equipment, the pollution of products, even the occurrence of malignant accidents, such as combustion explosion and the like, cause the serious waste of resources and energy sources, and cause the serious loss of national economy. According to the estimation, the metal equipment scrapped due to corrosion accounts for 30% of the output of the metal equipment every year in the world, 10% of steel is removed without returning except the recycled part, so that the research and development of the metal corrosion prevention technology are carried out, a series of important social and economic problems such as energy conservation, material conservation, resource and environment protection, normal production guarantee and the like are involved, the metal equipment also has irreplaceable effects in the economic construction of China, and the search for effective technical means to realize the metal surface protection is a common attention target of researchers in various countries. The method is used for dealing with metal corrosion, firstly, the structure of a metal material is changed by doping elements, secondly, an electrochemical cathode and anode protection method is adopted according to the principle of a primary battery, thirdly, an organic coating and a non-metallic oxide coating are added on the surface of the metal, the existing main corrosion prevention means of the steel wire is galvanization and coating of grease, the galvanized steel wire is easy to react with mortar, the grease loss speed is high, the corrosion resistance can not meet the higher actual requirement, and the purpose of high-efficiency corrosion prevention can not be realized. Therefore, we propose an anticorrosion steel wire with a molybdenum disulfide coating and a preparation process thereof.
Disclosure of Invention
The invention aims to provide an anticorrosive steel wire with a molybdenum disulfide coating and a preparation process thereof, and aims to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an anticorrosive steel wire with molybdenum disulfide coating, includes steel wire, first coating and second coating, the outer surface of steel wire is scribbled and is equipped with first coating, the lateral wall nestification of first coating has the wire, the outer surface of first coating is scribbled and is equipped with the second coating, first coating is organic coating, the second coating is modified molybdenum disulfide coating.
In the technical scheme, the structure of the anticorrosion steel wire is sequentially the steel wire, the first coating, the metal wire and the second coating from inside to outside, the steel wire is enabled to have multiple protection by the structural design, the contact between the steel wire and the external environment is avoided, the corrosion degree of the steel wire can be relieved by the metal wire when the coatings are damaged, the mechanical property, the electrical property and the like of the steel wire are improved, and the anticorrosion capacity and the comprehensive performance of the anticorrosion steel wire are improved.
As a preferred embodiment of the present invention, the first coating layer comprises the following components by weight: 56-78 parts of polythiophene, 13.5-20.5 parts of nano zinc powder and 3.2-4.8 parts of nano aluminum powder.
In the technical scheme, the first coating takes polythiophene, nano zinc powder and nano aluminum powder as main components, the polythiophene has high electric conductivity and high strength, the zinc has excellent atmospheric corrosion resistance and electromagnetic field resistance, and the aluminum has ductility, good electric and heat conductivity and excellent oxidation resistance.
As a preferred embodiment of the present invention, the second coating layer comprises the following components by weight: 20-27 parts of ammonium molybdate, 9.7-20 parts of potassium thiocyanate, 3.6-5.2 parts of nickel nitrate and 0.5-1.0 part of hexadecyl trimethyl ammonium bromide.
In a preferred embodiment of the present invention, the metal wires are zinc-aluminum alloy wires and high carbon steel wires.
A preparation process of an anticorrosive steel wire with a molybdenum disulfide coating comprises the following steps:
1) pretreatment: taking a steel wire for pretreatment to prepare a steel wire A;
2) preparing a first coating: melting the components in the first coating, immersing the steel wire A in the molten components to form the first coating to prepare a steel wire B, and hot-pressing the steel wire B by using metal wires and nesting the steel wire B in the first coating to prepare a steel wire C;
3) preparing a second coating: taking the components in the second coating to carry out electrochemical deposition on the steel wire C to prepare an anticorrosive steel wire D;
4) and (3) heat treatment: and (4) taking the steel wire D for heat treatment to prepare the anticorrosive steel wire.
As a preferred embodiment of the present invention, the step 1) includes the steps of:
(a) heating the steel wire to be treated to 950-975 ℃, preserving heat for 10-20 min, cooling to 550-600 ℃, preserving heat for 20-30 min, taking out and cooling to room temperature;
(b) placing the mixture into a mixed solution of sodium hydroxide and sodium nitrate, soaking the mixture for 10-20 min at the temperature of 70-90 ℃, performing ultrasonic treatment, taking out the mixture, washing the mixture with water, cutting the mixture into water, and air-drying the mixture, wherein the content of the sodium hydroxide is 75-80%, and the content of the sodium nitrate is 20-25%;
(c) soaking in 10-23% sulfuric acid solution at 38-50 ℃ for 10-30 min, performing ultrasonic treatment, taking out, and washing with high-pressure hot water, wherein the sulfuric acid solution also contains 4-5% thiourea;
(d) and (3) placing the steel wire into a phosphating solution, soaking for 5-15 min at the temperature of 50-75 ℃, washing with slow water for many times, and blowing and brushing with hot air at the temperature of 50-60 ℃ to prepare the steel wire A.
In the technical scheme, (a) the heat treatment of the steel wire refines grains and changes the appearance of the grains, the performance of the steel wire is enhanced, and meanwhile, impurities such as grease and the like on the surface of the steel wire are removed, (b-c) the steel wire is treated by using solution, the cleanliness of the surface of the steel wire is improved, and (d) the steel wire is finally placed in phosphating solution to be phosphated, so that the adhesion between the steel wire and a coating is improved, and the coating is favorably attached.
As a preferred embodiment of the present invention, the step 2) includes the steps of:
adding 0.48-0.72 part of coupling agent into a solvent for blending, uniformly stirring, adding nano aluminum powder and nano zinc powder, and stirring for 12-24 hours to prepare modified nano aluminum powder and modified nano zinc powder;
heating polythiophene to a molten state, adding modified nano aluminum powder and modified nano zinc powder, mixing and stirring uniformly to prepare a mixed solution, immersing the steel wire A into the mixed solution under an ultrasonic condition, taking out the steel wire A, cooling and drying to prepare a steel wire B;
and heating the metal wire to 100-150 ℃, carrying out hot pressing on the steel wire B, and nesting the metal wire in the first coating, wherein the diameter of the metal wire is 75-125% of the thickness of the first coating, so as to obtain the steel wire C.
In the technical scheme, the first coating prepared from polythiophene, nano zinc powder and nano aluminum powder has excellent conductivity, is beneficial to subsequent electrochemical reaction and has better strength and mechanical property, the polythiophene is filled with metal zinc and metal aluminum, the first coating has a compact structure and is not easy to react with elements in a steel wire in combination, the prepared coating has excellent corrosion resistance, and the strength, the mechanical property and the cohesiveness of the corrosion-resistant steel wire can be improved; the metal wire nests in first coating, can strengthen the steel wire, alleviates the external world and alleviates the destruction to the coating, also can alleviate the corrosion degree of steel wire after the coating destroys, promotes to improve mechanical properties to the steel wire etc..
As a preferred embodiment of the present invention, the step 3) includes the steps of:
adding ammonium molybdate, potassium thiocyanate, nickel nitrate and hexadecyl trimethyl ammonium bromide into pure water, uniformly mixing and fully stirring to prepare an electrolyte solution;
taking graphite as an anode electrode, taking a steel wire C as a cathode electrode, immersing the steel wire C in an electrolyte solution, and electrifying to form an electrolytic cell;
and then, taking a pulse direct current power supply as a working power supply, controlling the duty ratio to be 20-30%, controlling the processing time to be 10-30 s, carrying out electromagnetic stirring at the same time, carrying out plating current of 5-10A, and taking out and drying the plated steel wire to obtain a steel wire D.
In the technical scheme, the molybdenum disulfide is deposited in an electrochemical deposition mode by taking ammonium molybdate and potassium thiocyanate as electroplating reactants, the prepared second coating is clean and free of impurities and can form the molybdenum disulfide with a single crystal grain shape, the prepared second coating is uniform and compact and is tightly adhered to the first coating and the metal wire, and the second coating is doped with the metal nickel by adding the nickel nitrate, so that the corrosion resistance and the ductility of the corrosion-resistant steel wire are improved.
As a preferred embodiment of the present invention, the step 4) includes the steps of:
and (3) placing the steel wire D at the temperature of 100-150 ℃, and preserving heat for 1-3 hours to obtain the anticorrosive steel wire.
In the technical scheme, the steel wire is subjected to heat treatment, so that the dehydration of the steel wire is promoted, the drying of the steel wire is ensured, the steel wire is prevented from being damaged by water in the steel wire in an external environment, the corrosion initiation event is delayed, and the corrosion prevention effect of the steel wire is prolonged.
Compared with the prior art, the invention has the following beneficial effects:
according to the anti-corrosion steel wire with the molybdenum disulfide coating and the preparation process thereof, the multiple structures, the components and the preparation process of the outer surface of the steel wire are arranged, so that the adhesion between the anti-corrosion structure and the steel wire is good, the reaction caused by the contact with the external environment can be avoided, the corrosion acceleration can be caused, the anti-corrosion capability of the steel wire can be realized, and the strength, the mechanical property and the like of the manufactured steel wire can be improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Heating the steel wire to be treated to 950 ℃, preserving heat for 10min, then cooling to 550 ℃, preserving heat for 20min, then taking out and cooling to room temperature; soaking in mixed solution of sodium hydroxide and sodium nitrate at 70 deg.C for 10min, ultrasonic treating, washing, cutting into water, and air drying, wherein the sodium hydroxide content is 75% and the sodium nitrate content is 20%; soaking in 10% sulfuric acid solution containing 4% thiourea at 38 deg.C for 10min, ultrasonic treating, and washing with high pressure hot water; soaking in phosphating solution at 50 deg.C for 5min, washing with slow flowing water for several times, and blowing with 50 deg.C hot air to obtain steel wire A;
adding a coupling agent into a solvent for blending, uniformly stirring, adding 3.2 parts of nano aluminum powder and 13.5 parts of nano zinc powder, and stirring for 12 hours to obtain modified nano aluminum powder and modified nano zinc powder; heating 56 parts of polythiophene to a molten state, adding modified nano aluminum powder and modified nano zinc powder, mixing and stirring uniformly to prepare a mixed solution, immersing the steel wire A into the mixed solution under an ultrasonic condition, taking out the steel wire A, cooling and drying to prepare a steel wire B; heating a metal wire to 100 ℃, carrying out hot pressing on the steel wire B, and nesting the metal wire in the first coating, wherein the diameter of the metal wire is 75% of the thickness of the first coating, so as to obtain a steel wire C;
adding 20 parts of ammonium molybdate, 9.7 parts of potassium thiocyanate, 3.6 parts of nickel nitrate and 0.5 part of hexadecyl trimethyl ammonium bromide into pure water, uniformly mixing and fully stirring to prepare an electrolyte solution; taking graphite as an anode electrode, taking a steel wire C as a cathode electrode, immersing the steel wire C in an electrolyte solution, and electrifying to form an electrolytic cell; then, a pulse direct current power supply is used as a working power supply, the duty ratio is 20%, the processing time is 10s, electromagnetic stirring is carried out simultaneously, the plating current of 5A is used, and then the plated steel wire is taken out and dried to obtain a steel wire D;
and (3) placing the steel wire D at the temperature of 100 ℃, and preserving heat for 1h to obtain the anticorrosive steel wire.
Example 2
Heating the steel wire to be treated to 963 ℃, preserving heat for 15min, then cooling to 575 ℃, preserving heat for 25min, then taking out and cooling to room temperature; soaking in mixed solution of sodium hydroxide and sodium nitrate at 80 deg.C for 15min, ultrasonic treating, washing, cutting into water, and air drying, wherein the sodium hydroxide content is 77% and the sodium nitrate content is 22%; soaking in 16% sulfuric acid solution containing 4.5% thiourea at 44 deg.C for 20min, ultrasonic treating, and washing with high pressure hot water; soaking in phosphating solution at 62 deg.C for 10min, washing with slow flowing water for several times, and blowing with 55 deg.C hot air to obtain steel wire A;
adding a coupling agent into a solvent for blending, uniformly stirring, adding 4.0 parts of nano aluminum powder and 17 parts of nano zinc powder, and stirring for 18 hours to obtain modified nano aluminum powder and modified nano zinc powder; heating 67 parts of polythiophene to a molten state, adding modified nano aluminum powder and modified nano zinc powder, mixing and stirring uniformly to prepare a mixed solution, immersing the steel wire A into the mixed solution under an ultrasonic condition, taking out the steel wire A, cooling and drying to prepare a steel wire B; heating a metal wire to 125 ℃, carrying out hot pressing on the steel wire B, and nesting the metal wire in the first coating, wherein the diameter of the metal wire is 100% of the thickness of the first coating, so as to obtain a steel wire C;
adding 23 parts of ammonium molybdate, 15 parts of potassium thiocyanate, 4.4 parts of nickel nitrate and 0.7 part of hexadecyl trimethyl ammonium bromide into pure water, uniformly mixing and fully stirring to prepare an electrolyte solution; taking graphite as an anode electrode, taking a steel wire C as a cathode electrode, immersing the steel wire C in an electrolyte solution, and electrifying to form an electrolytic cell; then, a pulse direct current power supply is used as a working power supply, the duty ratio is 25%, the processing time is 20s, electromagnetic stirring is carried out simultaneously, the plating current of 7A is used, and then the plated steel wire is taken out and dried to obtain a steel wire D;
and (3) placing the steel wire D at the temperature of 125 ℃, and preserving heat for 2 hours to obtain the anticorrosive steel wire.
Example 3
Heating the steel wire to be treated to 975 ℃, preserving heat for 20min, then cooling to 600 ℃, preserving heat for 30min, then taking out and cooling to room temperature; soaking in mixed solution of sodium hydroxide and sodium nitrate at 90 deg.C for 20min, ultrasonic treating, washing, cutting into water, and air drying, wherein the sodium hydroxide content is 80% and the sodium nitrate content is 25%; soaking in 23% sulfuric acid solution containing 5% thiourea at 50 deg.C for 30min, ultrasonic treating, and washing with high pressure hot water; soaking in phosphating solution at 75 deg.C for 15min, washing with slow flowing water for several times, and blowing with 60 deg.C hot air to obtain steel wire A;
adding a coupling agent into a solvent for blending, uniformly stirring, adding 4.8 parts of nano aluminum powder and 20.5 parts of nano zinc powder, and stirring for 24 hours to obtain modified nano aluminum powder and modified nano zinc powder; heating 78 parts of polythiophene to a molten state, adding modified nano aluminum powder and modified nano zinc powder, mixing and stirring uniformly to prepare a mixed solution, immersing the steel wire A into the mixed solution under an ultrasonic condition, taking out the steel wire A, cooling and drying to prepare a steel wire B; heating a metal wire to 150 ℃, carrying out hot pressing on the steel wire B, and nesting the metal wire in the first coating, wherein the diameter of the metal wire is 125% of the thickness of the first coating, so as to obtain a steel wire C;
adding 27 parts of ammonium molybdate, 20 parts of potassium thiocyanate, 5.2 parts of nickel nitrate and 1.0 part of hexadecyl trimethyl ammonium bromide into pure water, uniformly mixing and fully stirring to prepare an electrolyte solution; taking graphite as an anode electrode, taking a steel wire C as a cathode electrode, immersing the steel wire C in an electrolyte solution, and electrifying to form an electrolytic cell; then, a pulse direct current power supply is used as a working power supply, the duty ratio is 30%, the processing time is 30s, electromagnetic stirring is carried out simultaneously, the plating current of 10A is used, and then the plated steel wire is taken out and dried to obtain a steel wire D;
and (3) placing the steel wire D at the temperature of 150 ℃, and preserving heat for 3 hours to obtain the anticorrosive steel wire.
Comparative example 1
Adding a coupling agent into a solvent for blending, uniformly stirring, adding 4.0 parts of nano aluminum powder and 17 parts of nano zinc powder, and stirring for 18 hours to obtain modified nano aluminum powder and modified nano zinc powder; heating 67 parts of polythiophene to a molten state, adding modified nano aluminum powder and modified nano zinc powder, mixing and stirring uniformly to prepare a mixed solution, immersing the steel wire to be treated in the mixed solution under an ultrasonic condition, taking out, cooling and drying to prepare a steel wire A; heating a metal wire to 125 ℃, carrying out hot pressing on the steel wire B, and nesting the metal wire in the first coating, wherein the diameter of the metal wire is 100% of the thickness of the first coating, so as to obtain the steel wire B;
adding 23 parts of ammonium molybdate, 15 parts of potassium thiocyanate, 4.4 parts of nickel nitrate and 0.7 part of hexadecyl trimethyl ammonium bromide into pure water, uniformly mixing and fully stirring to prepare an electrolyte solution; taking graphite as an anode electrode, taking a steel wire B as a cathode electrode, immersing the steel wire B in an electrolyte solution, and electrifying to form an electrolytic cell; then, a pulse direct current power supply is used as a working power supply, the duty ratio is 25%, the processing time is 20s, electromagnetic stirring is carried out simultaneously, the plating current of 7A is used, and then the plated steel wire is taken out and dried to obtain a steel wire C;
and (3) placing the steel wire C at the temperature of 125 ℃, and preserving heat for 2 hours to obtain the anticorrosive steel wire.
Comparative example 2
Heating the steel wire to be treated to 963 ℃, preserving heat for 15min, then cooling to 575 ℃, preserving heat for 25min, then taking out and cooling to room temperature; soaking in mixed solution of sodium hydroxide and sodium nitrate at 80 deg.C for 15min, ultrasonic treating, washing, cutting into water, and air drying, wherein the sodium hydroxide content is 77% and the sodium nitrate content is 22%; soaking in 16% sulfuric acid solution containing 4.5% thiourea at 44 deg.C for 20min, ultrasonic treating, and washing with high pressure hot water; soaking in phosphating solution at 62 deg.C for 10min, washing with slow flowing water for several times, and blowing with 55 deg.C hot air to obtain steel wire A;
adding a coupling agent into a solvent for blending, uniformly stirring, adding 4.0 parts of nano aluminum powder and 17 parts of nano zinc powder, and stirring for 18 hours to obtain modified nano aluminum powder and modified nano zinc powder; heating 67 parts of polythiophene to a molten state, adding modified nano aluminum powder and modified nano zinc powder, mixing and stirring uniformly to prepare a mixed solution, immersing the steel wire A into the mixed solution under an ultrasonic condition, taking out the steel wire A, cooling and drying to prepare a steel wire B;
adding 23 parts of ammonium molybdate, 15 parts of potassium thiocyanate, 4.4 parts of nickel nitrate and 0.7 part of hexadecyl trimethyl ammonium bromide into pure water, uniformly mixing and fully stirring to prepare an electrolyte solution; taking graphite as an anode electrode, taking a steel wire B as a cathode electrode, immersing the steel wire B in an electrolyte solution, and electrifying to form an electrolytic cell; then, a pulse direct current power supply is used as a working power supply, the duty ratio is 25%, the processing time is 20s, electromagnetic stirring is carried out simultaneously, the plating current of 7A is used, and then the plated steel wire is taken out and dried to obtain a steel wire C;
and (3) placing the steel wire C at the temperature of 125 ℃, and preserving heat for 2 hours to obtain the anticorrosive steel wire.
Comparative example 3
Heating the steel wire to be treated to 963 ℃, preserving heat for 15min, then cooling to 575 ℃, preserving heat for 25min, then taking out and cooling to room temperature; soaking in mixed solution of sodium hydroxide and sodium nitrate at 80 deg.C for 15min, ultrasonic treating, washing, cutting into water, and air drying, wherein the sodium hydroxide content is 77% and the sodium nitrate content is 22%; soaking in 16% sulfuric acid solution containing 4.5% thiourea at 44 deg.C for 20min, ultrasonic treating, and washing with high pressure hot water; soaking in phosphating solution at 62 deg.C for 10min, washing with slow flowing water for several times, and blowing with 55 deg.C hot air to obtain steel wire A;
adding 23 parts of ammonium molybdate, 15 parts of potassium thiocyanate, 4.4 parts of nickel nitrate and 0.7 part of hexadecyl trimethyl ammonium bromide into pure water, uniformly mixing and fully stirring to prepare an electrolyte solution; taking graphite as an anode electrode, taking a steel wire A as a cathode electrode, immersing the steel wire A in an electrolyte solution, and electrifying to form an electrolytic cell; then, a pulse direct current power supply is used as a working power supply, the duty ratio is 25%, the processing time is 20s, electromagnetic stirring is carried out simultaneously, the plating current of 7A is used, and then the plated steel wire is taken out and dried to obtain a steel wire B;
and (3) placing the steel wire B at the temperature of 125 ℃, and preserving heat for 2 hours to obtain the anticorrosive steel wire.
Comparative example 4
Adding 23 parts of ammonium molybdate, 15 parts of potassium thiocyanate, 4.4 parts of nickel nitrate and 0.7 part of hexadecyl trimethyl ammonium bromide into pure water, uniformly mixing and fully stirring to prepare an electrolyte solution; taking graphite as an anode electrode, taking a steel wire to be treated as a cathode electrode, immersing the steel wire in an electrolyte solution, and electrifying to form an electrolytic cell; and then, taking a pulse direct current power supply as a working power supply, controlling the duty ratio to be 25%, controlling the processing time to be 20s, simultaneously performing electromagnetic stirring, performing the electromagnetic stirring at the plating current of 7A, and taking out and drying the plated steel wire to obtain the anticorrosive steel wire.
Experiment of
Compared with example 1, the process parameters of example 2 are different from those of example 3;
in comparison with example 2, comparative example 1 did not pretreat the steel wire;
in comparison to example 2, comparative example 2 has no wire added;
in contrast to example 2, comparative example 3 had no first coating added;
in contrast to example 2, comparative example 4 only provides for the preparation of the second coating in the steel wire.
Samples are prepared by taking the anticorrosive coatings obtained in the examples 1-3 and the comparative examples 1-4, and the adhesion, the anticorrosive performance and the mechanical performance of the anticorrosive coatings are respectively detected and the detection results are recorded:
the adhesive force is tested by a scratch method, (the test result is 0-5 grade, the 0 grade is completely smooth, no delamination phenomenon exists in any cut, the 1 grade is that a small block is stripped at the cut intersection, the influence area is less than 5 percent, the 2 grade is that the edge of the cut or/and the edge of the intersection is stripped, the influence area is 5-15 percent, the edge of the 3 grade cut is partially stripped or the whole piece is stripped, and the influence area is 15-35 percent);
the test conditions of the corrosion resistance are as follows: the samples were subjected to a salt spray test in 3.5% sodium chloride solution, and the change of the samples after 120 hours was observed. (test results are classified into 0-9 grades, wherein the 0 grade is no corrosion, the surface has no obvious visible change, the 1 grade is trace corrosion, 1-5 rusty points with the diameter of less than 1mm exist, the 2 grade is slight corrosion, more rusty points with the diameter of less than 1mm exist, the corrosion area is less than 10%, the 3 grade is slight corrosion, the rusty points with the diameter of 1-10 mm exist, the corrosion area is 10-40%, the 4 grade is moderate corrosion, more rusty points with the diameter of 1-10 mm exist, and the corrosion area is 40-60%);
the mechanical properties are indicated by tensile strength, elongation and elastic modulus.
From the data in the table above, it is clear that the following conclusions can be drawn:
the anticorrosive coatings obtained in the examples 1-3 and the comparative examples 1-4 are compared, and the detection results show that the tensile strength, the elongation and the elastic modulus of the anticorrosive coatings of the examples 1-3 are obviously improved compared with those of the anticorrosive coatings of the comparative examples 1-4, and the corrosion grade of the anticorrosive coatings of the examples 1-3 after being influenced by salt mist is lower, which fully shows that the improvement of the adhesion, the corrosion resistance and the mechanical property of the anticorrosive coatings is realized, and according to the data change in the table, each process has a promoting effect on the performance improvement, and the anticorrosive coatings have stable effects and higher practicability.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (4)
1. A preparation process of an anticorrosive steel wire with a molybdenum disulfide coating is characterized by comprising the following steps:
1) pretreatment:
(a) heating the steel wire to be treated to 950-975 ℃, preserving heat for 10-20 min, cooling to 550-600 ℃, preserving heat for 20-30 min, taking out and cooling to room temperature;
(b) placing the mixture into a mixed solution of sodium hydroxide and sodium nitrate, soaking the mixture for 10-20 min at the temperature of 70-90 ℃, performing ultrasonic treatment, taking out the mixture, washing the mixture with water, cutting the mixture into water, and air-drying the mixture, wherein the content of the sodium hydroxide is 75-80%, and the content of the sodium nitrate is 20-25%;
(c) soaking in 10-23% sulfuric acid solution at 38-50 ℃ for 10-30 min, performing ultrasonic treatment, taking out, and washing with high-pressure hot water, wherein the sulfuric acid solution also contains 4-5% thiourea;
(d) placing the steel wire into a phosphating solution, soaking for 5-15 min at the temperature of 50-75 ℃, washing with slow water for many times, and blowing and brushing with hot air at the temperature of 50-60 ℃ to prepare a steel wire A;
2) preparing a first coating:
adding 0.48-0.72 weight part of coupling agent into a solvent for blending, uniformly stirring, adding 3.2-4.8 weight parts of nano aluminum powder and 13.5-20.5 weight parts of nano zinc powder, and stirring for 12-24 hours to prepare modified nano aluminum powder and modified nano zinc powder;
heating 56-78 parts by weight of polythiophene to a molten state, adding modified nano aluminum powder and modified nano zinc powder, uniformly mixing and stirring to obtain a mixed solution, immersing the steel wire A into the mixed solution under an ultrasonic condition, taking out the steel wire A, cooling and drying to obtain a steel wire B;
heating a metal wire to 100-150 ℃, carrying out hot pressing on the steel wire B, and nesting the metal wire in the first coating, wherein the diameter of the metal wire is 75-125% of the thickness of the first coating, so as to obtain a steel wire C;
3) preparing a second coating:
adding 20-27 parts by weight of ammonium molybdate, 9.7-20 parts by weight of potassium thiocyanate, 3.6-5.2 parts by weight of nickel nitrate and 0.5-1.0 part by weight of hexadecyl trimethyl ammonium bromide into pure water, uniformly mixing and fully stirring to prepare an electrolyte solution;
taking graphite as an anode electrode, taking a steel wire C as a cathode electrode, immersing the steel wire C in an electrolyte solution, and electrifying to form an electrolytic cell;
then, a pulse direct current power supply is used as a working power supply, the duty ratio is 20-30%, the processing time is 10-30 s, electromagnetic stirring is carried out at the same time, the plating current is 5-10A, and then the plated steel wire is taken out and dried to obtain a steel wire D;
4) and (3) heat treatment: and (4) taking the steel wire D for heat treatment to prepare the anticorrosive steel wire.
2. The process for preparing a corrosion resistant steel wire with a molybdenum disulfide coating according to claim 1, wherein said step 4) comprises the steps of:
and (3) placing the steel wire D at the temperature of 100-150 ℃, and preserving heat for 1-3 hours to obtain the anticorrosive steel wire.
3. The process for preparing an anti-corrosive steel wire with a molybdenum disulfide coating according to claim 1 or 2, wherein the anti-corrosive steel wire with a molybdenum disulfide coating is prepared by the following steps: the steel wire comprises a steel wire, a first coating and a second coating, wherein the first coating is coated on the outer surface of the steel wire, the metal wire is nested on the outer side wall of the first coating, the second coating is coated on the outer surface of the first coating, the first coating is a modified metal coating, and the second coating is a modified molybdenum disulfide coating.
4. A corrosion resistant steel wire with a molybdenum disulfide coating according to claim 3, wherein: the metal wires are zinc-aluminum alloy wires and high-carbon steel wires.
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