CN115232491A - Carbon steel surface super-hydrophobic titanium dioxide composite coating and preparation method and application thereof - Google Patents
Carbon steel surface super-hydrophobic titanium dioxide composite coating and preparation method and application thereof Download PDFInfo
- Publication number
- CN115232491A CN115232491A CN202210943342.1A CN202210943342A CN115232491A CN 115232491 A CN115232491 A CN 115232491A CN 202210943342 A CN202210943342 A CN 202210943342A CN 115232491 A CN115232491 A CN 115232491A
- Authority
- CN
- China
- Prior art keywords
- carbon steel
- titanium dioxide
- super
- composite coating
- dioxide composite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 87
- 238000000576 coating method Methods 0.000 title claims abstract description 73
- 239000011248 coating agent Substances 0.000 title claims abstract description 69
- 230000003075 superhydrophobic effect Effects 0.000 title claims abstract description 61
- 229910000975 Carbon steel Inorganic materials 0.000 title claims abstract description 59
- 239000010962 carbon steel Substances 0.000 title claims abstract description 59
- 239000002131 composite material Substances 0.000 title claims abstract description 48
- 239000004408 titanium dioxide Substances 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 229910010413 TiO 2 Inorganic materials 0.000 claims abstract description 39
- 238000005507 spraying Methods 0.000 claims abstract description 25
- 238000005260 corrosion Methods 0.000 claims abstract description 22
- 230000007797 corrosion Effects 0.000 claims abstract description 20
- 239000002245 particle Substances 0.000 claims abstract description 19
- 239000000725 suspension Substances 0.000 claims description 32
- 239000000853 adhesive Substances 0.000 claims description 21
- 230000001070 adhesive effect Effects 0.000 claims description 21
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 18
- 239000011858 nanopowder Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000008367 deionised water Substances 0.000 claims description 14
- 229910021641 deionized water Inorganic materials 0.000 claims description 14
- 239000011259 mixed solution Substances 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 14
- 239000003607 modifier Substances 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 7
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 239000004814 polyurethane Substances 0.000 claims description 2
- 229920002635 polyurethane Polymers 0.000 claims description 2
- 239000010936 titanium Substances 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- RSKGMYDENCAJEN-UHFFFAOYSA-N hexadecyl(trimethoxy)silane Chemical compound CCCCCCCCCCCCCCCC[Si](OC)(OC)OC RSKGMYDENCAJEN-UHFFFAOYSA-N 0.000 abstract description 12
- 238000005536 corrosion prevention Methods 0.000 abstract description 6
- 239000002114 nanocomposite Substances 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 abstract description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 12
- 239000007769 metal material Substances 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000011780 sodium chloride Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 239000006070 nanosuspension Substances 0.000 description 5
- 230000010287 polarization Effects 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 238000001291 vacuum drying Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 238000001453 impedance spectrum Methods 0.000 description 2
- 238000011031 large-scale manufacturing process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000005661 hydrophobic surface Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
- C01G23/047—Titanium dioxide
- C01G23/08—Drying; Calcining ; After treatment of titanium oxide
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
- B05D2202/10—Metallic substrate based on Fe
Abstract
The invention provides a carbon steel surface super-hydrophobic titanium dioxide composite coating, a preparation method and application thereof, belonging to the technical field of composite materials; in the present invention, (gamma-aminopropyl) triethoxysilane (KH 550) and Hexadecyltrimethoxysilane (HDTMS) are used to react with anatase type nano TiO 2 Modifying the particles to obtain modified TiO 2 Spraying the nano composite material on the surface of carbon steel, and curing to obtain a super-hydrophobic titanium dioxide coating; the preparation method of the composite material is simple, the cost is low, the composite material has good corrosion resistance, and the composite material is applied to goldBelongs to the field of material corrosion prevention and has good application prospect.
Description
Technical Field
The invention belongs to the technical field of composite materials, and particularly relates to a carbon steel surface super-hydrophobic titanium dioxide composite coating, and a preparation method and application thereof.
Background
The metal corrosion causes economic loss accounting for more than 3.5% of the world's GDP each year, and it seriously threatens the safety and practicality of metal materials. Therefore, metal corrosion is closely related to economic development, and it is imperative to develop effective protection methods to improve the service life, safety and stability of metal materials. Carbon steel is one of the most widely used steels, and is very susceptible to corrosion caused by the influence of the surrounding environment, thereby causing economic loss and potential safety hazard to production and life. Therefore, the method has important significance for the corrosion prevention and protection of the carbon steel.
The coating is an effective corrosion protection mode and is widely applied to corrosion prevention of carbon steel. Currently, resin coatings are mainly used in the market, but various resin corrosion-resistant coatings are easy to fall off in a humid environment, and the mechanical strength is obviously poor. The super-hydrophobic coating becomes the most potential corrosion protection mode at present, a series of researches and preparation processes are provided, and the hydrophobic surface of the super-hydrophobic coating is applied to corrosion prevention because the micro-nano structure can store a large amount of air, so that the contact area between corrosive liquid and the surface is greatly reduced, and the super-hydrophobic coating has good corrosion prevention performance. However, the existing super-hydrophobic coating has the defects of complex process, raw material non-conformity with the requirements of green environmental protection and the like, and is difficult to be put into large-scale production and application. The epoxy resin is the most widely used anticorrosive coating at present, but the coating after curing has high water absorption and high brittleness and is easy to generate cracks, so that the anticorrosive effect is greatly reduced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a carbon steel surface super-hydrophobic titanium dioxide composite coating, a preparation method and application thereof. In the present invention, (gamma-aminopropyl) triethoxysilane (KH 550) and Hexadecyltrimethoxysilane (HDTMS) are used to react with anatase type nano TiO 2 The particles are modified, howeverModified TiO is obtained 2 Spraying the nano composite material on the surface of carbon steel, and curing to obtain a super-hydrophobic titanium dioxide coating; the preparation method of the composite material is simple, the cost is low, the composite material has good corrosion resistance, and the composite material has good application prospect in the field of corrosion resistance of metal materials.
The invention firstly provides a carbon steel surface super-hydrophobic titanium dioxide composite coating, and the composite coating is prepared by synergistically modifying nano TiO by two silane coupling agents 2 Modified TiO 2 The nano composite coating generates a crosslinking phenomenon on the basis of the original uniform particles, but does not change the original micro roughness.
The invention also provides a preparation method of the carbon steel surface super-hydrophobic titanium dioxide composite coating, which comprises the following steps:
(1) Mixing nanometer TiO 2 Uniformly dispersing the particles in a mixed solution of absolute ethyl alcohol and deionized water to obtain a suspension;
(2) Heating the suspension, adding KH550 and HDTMS modifier to react under heating condition, filtering and drying after the reaction is finished to obtain super-hydrophobic TiO 2 A nanopowder;
(3) Spraying an adhesive on the surface of carbon steel, and then spraying super-hydrophobic TiO 2 And dispersing the nano powder in absolute ethyl alcohol, stirring at room temperature to obtain a suspension, spraying the suspension on the surface of carbon steel containing an adhesive, and curing to obtain the super-hydrophobic titanium dioxide composite coating.
Further, in the step (1), the nano TiO 2 The particles comprise titanium ore type nano TiO with the particle size of 10-100nm 2 One or more of the particles.
Further, in the step (1), the volume ratio of the deionized water to the absolute ethyl alcohol is 1:10 to 20; nano TiO 2 2 The mass ratio of the particles to the mixed solution is 0.1-1.
Further, in the step (2), the suspension is heated to 40-80 ℃, stirred for 5-10min and then added with KH550 and HDTMS modifier; the molar concentration of KH550 is 0.001-0.005 mol/L; the molar concentration of HDTMS is 0.003-0.025 mol/L.
Further, in the step (2), the reaction is carried out for 4-12 h at the temperature of 40-80 ℃.
Further, in the step (3), the adhesive is any one of a 3M 75 adhesive, an acrylate adhesive or a polyurethane adhesive.
Further, in the step (3), the spraying thickness of the coating is 50-500 μm.
Further, in the step (3), the super-hydrophobic TiO 2 The mass ratio of the nano powder to the absolute ethyl alcohol is 0.1:5 to 10.
Further, in the step (3), the suspension is obtained by stirring at room temperature for 10-30 min.
Further, in the step (3), the curing condition is that the curing is carried out for 12 to 24 hours at room temperature.
The invention also provides the application of the super-hydrophobic titanium dioxide composite coating on the surface of the carbon steel in corrosion prevention of the carbon steel.
Further, the carbon steel comprises Q215, Q235, Q255, or Q275.
Compared with the prior art, the invention has the beneficial effects that:
the carbon steel surface super-hydrophobic titanium dioxide composite coating prepared by the invention is prepared by synergistically modifying nano TiO by two silane coupling agents 2 Modified TiO 2 The nano composite coating generates a crosslinking phenomenon on the basis of the original uniform particles, the compactness of the coating is enhanced, the corrosion resistance of the coating is improved, the micro roughness of the modified coating is not changed, and the pores on the surface construct good super-hydrophobic performance.
The super-hydrophobic titanium dioxide composite coating on the surface of the carbon steel prepared by the invention can be used as a barrier between a metal substrate and a corrosive medium, and the surface of the carbon steel has good self-cleaning property, so that the metal material can be effectively protected for a long time, and the corrosion of the metal material is reduced or prevented. In addition, the super-hydrophobic titanium dioxide composite coating on the surface of the carbon steel prepared by the invention has higher mechanical property, and can prevent the coating from losing super-hydrophobicity under the influence of external environment.
The invention develops a simpler and more practical carbon steel surface super-hydrophobic titanium dioxide composite coating, overcomes the defect of complexity of the existing preparation method by adopting a spraying method, reduces the preparation cost, simplifies the preparation process, shortens the preparation period and is beneficial to large-scale production.
Drawings
FIG. 1 is a graph of contact angle for each example, where a is unmodified TiO 2 The angle of the static contact angle of (a) is 48 degrees, and b is modified TiO 2 The angle of the static contact angle of (2) is more than 150 degrees, which shows that the modified coating shows good hydrophobicity.
FIG. 2 is an electrochemical impedance spectrum of the superhydrophobic titanium dioxide composite coating on the surface of carbon steel in 3.5wt% NaCl solution.
FIG. 3 is a graph showing the polarization curve of the superhydrophobic titanium dioxide composite coating on the surface of carbon steel in a 3.5wt% NaCl solution.
FIG. 4 is a graph of the static contact angle of the super-hydrophobic titanium dioxide composite coating on the surface of carbon steel after friction.
Detailed Description
The invention will be further described with reference to the following figures and specific examples, but the scope of the invention is not limited thereto.
Example 1:
(1) 0.2g of anatase 25nm TiO 2 Uniformly dispersing the particles in a mixed solution of deionized water and absolute ethyl alcohol with the total volume of 20mL, wherein the volume of the deionized water added in the mixed solution is 1mL, and performing ultrasonic separation for 10min to obtain a well-dispersed suspension.
(2) Magnetically stirring the suspension at a constant temperature of 60 ℃ in a constant-temperature oil bath for 5min, adding 0.003mol/L KH550 and 0.003mol/L HDTMS modifier, continuously reacting at 60 ℃ for 6h to obtain suspension, filtering, and vacuum drying for 12h to obtain super-hydrophobic TiO 2 And (4) nano powder.
(3) 0.1g of superhydrophobic TiO 2 Dispersing the nano powder in 10mL of absolute ethyl alcohol, stirring for 10min at room temperature to obtain a suspension, spraying the RA adhesive on the surface of the treated Q235 carbon steel, and then carrying out modification on the surface of the modified TiO 2 And spraying the nano suspension on the surface of carbon steel containing the adhesive, and curing for 24h to obtain the super-hydrophobic titanium dioxide composite coating on the surface of the carbon steel.
The contact angle of the surface of the prepared carbon steel surface super-hydrophobic titanium dioxide composite coating is measured by a contact angle measuring instrument, and the measurement result is shown in figure 1. As can be seen from FIG. 1, unmodified nano TiO 2 The contact angle is 48 degrees, the contact angle can reach 158 degrees after modification, and the coating has good hydrophobicity.
Example 2:
(1) 0.2g of anatase 25nm TiO 2 Uniformly dispersing the particles in a mixed solution of deionized water and absolute ethyl alcohol with the total volume of 20mL, wherein the volume of the deionized water added in the mixed solution is 1mL, and performing ultrasonic separation for 10min to obtain a well-dispersed suspension.
(2) Magnetically stirring the suspension at 60 deg.C in a constant temperature oil bath for 5min, adding 0.003mol/L KH550 and 0.009mol/L HDTMS modifier, reacting at 60 deg.C for 6 hr to obtain suspension, filtering, and vacuum drying for 12 hr to obtain super-hydrophobic TiO 2 And (4) nano powder.
(3) 0.1g of superhydrophobic TiO 2 Dispersing the nano powder in 10mL of absolute ethyl alcohol, stirring for 10min at room temperature to obtain a suspension, spraying the RA adhesive on the surface of the treated Q235 carbon steel, and then carrying out modification on the surface of the modified TiO 2 And spraying the nano suspension on the surface of carbon steel containing an adhesive, wherein the spraying thickness of the coating is 200 mu m, and curing for 24 hours to obtain the super-hydrophobic titanium dioxide composite coating on the surface of the carbon steel.
Example 3:
(1) 0.2g of anatase 25nm TiO 2 Uniformly dispersing the particles in a mixed solution of deionized water and absolute ethyl alcohol with the total volume of 20mL, wherein the volume of the deionized water added in the mixed solution is 1mL, and performing ultrasonic separation for 10min to obtain a well-dispersed suspension.
(2) Magnetically stirring the suspension at a constant temperature of 60 ℃ for 5min, adding 0.003mol/L KH550 and 0.015mol/L HDTMS modifier, continuously reacting at 60 ℃ for 6h to obtain the suspension, filtering, and vacuum drying for 12h to obtain the super-hydrophobic TiO 2 And (4) nano powder.
(3) 0.1g of superhydrophobic TiO 2 Dispersing the nano powder in 10mL of absolute ethyl alcohol, stirring at room temperature for 10min to obtain a suspension, and spraying RA adhesive on the treated Q235 carbonAfter the surface of the steel, modifying TiO 2 And spraying the nano suspension on the surface of carbon steel containing the adhesive, wherein the spraying thickness of the coating is 200 mu m, and curing for 24h to obtain the super-hydrophobic titanium dioxide composite coating on the surface of the carbon steel.
Example 4:
(1) 0.2g of anatase type 25nm TiO 2 Uniformly dispersing the particles in a mixed solution of deionized water and absolute ethyl alcohol with the total volume of 20mL, wherein the volume of the deionized water added in the mixed solution is 1mL, and performing ultrasonic separation for 10min to obtain a well-dispersed suspension.
(2) Magnetically stirring the suspension at 60 ℃ in a constant-temperature oil bath for 5min, adding 0.003mol/L KH550 and 0.021mol/L HDTMS modifier, continuously reacting at 60 ℃ for 6h to obtain the suspension, filtering, and vacuum drying for 12h to obtain the super-hydrophobic TiO 2 And (4) nano powder.
(3) 0.1g of superhydrophobic TiO 2 Dispersing the nano powder in 10mL of absolute ethyl alcohol, stirring at room temperature for 10min to obtain a suspension, spraying RA adhesive on the surface of the treated Q235 carbon steel, and then, modifying TiO 2 And spraying the nano suspension on the surface of carbon steel containing the adhesive, wherein the spraying thickness of the coating is 200 mu m, and curing for 24h to obtain the super-hydrophobic titanium dioxide composite coating on the surface of the carbon steel.
Example 5:
(1) 0.2g of anatase 25nm TiO 2 Uniformly dispersing the particles in a mixed solution of deionized water and absolute ethyl alcohol with the total volume of 20mL, wherein the volume of the deionized water added in the mixed solution is 1mL, and performing ultrasonic separation for 10min to obtain a well-dispersed suspension.
(2) Magnetically stirring the suspension at a constant temperature of 60 ℃ in a constant-temperature oil bath for 5min, adding 0.003mol/L KH550 and 0.03mol/L HDTMS modifier, continuously reacting at 60 ℃ for 6h to obtain suspension, filtering, and vacuum drying for 12h to obtain super-hydrophobic TiO 2 And (4) nano powder.
(3) 0.1g of superhydrophobic TiO 2 Dispersing the nano powder in 10mL of absolute ethyl alcohol, stirring at room temperature for 10min to obtain a suspension, spraying RA adhesive on the surface of the treated Q235 carbon steel, and then, modifying TiO 2 Spraying the nano suspension liquid on carbon steel containing adhesiveAnd (3) curing the surface of the carbon steel surface by using the super-hydrophobic titanium dioxide composite coating, wherein the spraying thickness of the coating is 200 mu m, and the super-hydrophobic titanium dioxide composite coating is obtained after the carbon steel surface is cured for 24 hours.
Example 6:
the coatings were tested for corrosion resistance in 3.5wt% NaCl solution using a three electrode electrochemical workstation, model CHI660E, measuring Electrochemical Impedance (EIS) and Tafel polarization curves, respectively, with an EIS frequency range of 10 -2 To 10 6 Hz, tafel polarization curve potential scanning interval is-1.0V-0.5V, scanning speed is 10mV S -1 。
TABLE 1 polarization curve data for the superhydrophobic titanium dioxide composite coatings on bare steel and carbon steel surfaces in 3.5wt% NaCl solution
| Sample(s) | Self-corrosion current density I corr (A) | Self-etching potential E corr (V) | Corrosion inhibition efficiency eta (%) |
| Bare steel | -2.739×10 -5 | -0.748 | / |
| The invention | -1.169×10 -7 | -0.568 | 99.5 |
TABLE 1 polarization curve data for bare steel and superhydrophobic titania composite coating on carbon steel surface 3.5wt% NaCl solution, plotting FIG. 3 from the data in TABLE 1, where I corr And I corr (C) The self-corrosion current density of the working electrode covered by the blank working electrode and the effective coating respectively, and the calculation formula of the coating protection efficiency is as follows:
FIG. 2 is an electrochemical impedance spectrum in a 3.5wt% NaCl solution, in which it can be seen that the impedance value of the superhydrophobic titanium dioxide composite coating on the surface of carbon steel prepared by this method is much greater than that of the surface of bare steel, and the coating exhibits corrosion resistance. As can be seen by combining table 1 and fig. 2-3, the protective efficiency of the coating can reach 99.5%, which indicates that the coating can effectively protect the metal material from corrosion or corrosion for a long time.
In the embodiment, a mechanical durability test of the carbon steel surface super-hydrophobic titanium dioxide composite coating is also carried out, and the specific steps are as follows: the coating was rubbed with a 1000-mesh sandpaper loaded with a 200g weight for 1 rubbing test at a distance of 10cm, and a static contact angle chart was obtained after 20 cycles of rubbing. As can be seen from fig. 4, after 20 cycles, the contact angle is still greater than 150 °, and the coating shows good mechanical properties.
In conclusion, the super-hydrophobic titanium dioxide composite coating on the surface of the carbon steel prepared by the invention has the advantages of good mechanical property, strong corrosion resistance, simple preparation method, low cost, good corrosion resistance and good application prospect in the field of corrosion resistance of metal materials.
The examples are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any obvious modifications, substitutions or variations can be made by those skilled in the art without departing from the spirit of the present invention.
Claims (10)
1. A preparation method of a carbon steel surface super-hydrophobic titanium dioxide composite coating is characterized by comprising the following steps:
(1) Mixing nanometer TiO 2 Uniformly dispersing the particles in a mixed solution of absolute ethyl alcohol and deionized water to obtain a suspension;
(2) Heating the suspension, adding KH550 and HDTMS modifier to react under heating condition, filtering and drying after the reaction is finished to obtain super-hydrophobic TiO 2 A nanopowder;
(3) Spraying an adhesive on the surface of carbon steel, and then spraying super-hydrophobic TiO 2 And dispersing the nano powder in absolute ethyl alcohol, stirring at room temperature to obtain a suspension, spraying the suspension on the surface of carbon steel containing an adhesive, and curing to obtain the super-hydrophobic titanium dioxide composite coating.
2. The preparation method of the carbon steel surface super-hydrophobic titanium dioxide composite coating according to claim 1, wherein in the step (1), the nano TiO is 2 The particles comprise titanium ore type nano TiO with the particle size of 10-100nm 2 One or more of the particles;
the volume ratio of the deionized water to the absolute ethyl alcohol is 1:10 to 20;
the nano TiO 2 The mass ratio of the particles to the mixed solution is 0.1-1.
3. The preparation method of the carbon steel surface super-hydrophobic titanium dioxide composite coating according to claim 1, wherein in the step (2), the suspension is heated to 40-80 ℃ and stirred for 5-10min, and then KH550 and HDTMS modifier are added;
wherein the molar concentration of the KH550 is 0.001-0.005 mol/L; the molar concentration of HDTMS is 0.003-0.025 mol/L.
4. The preparation method of the carbon steel surface super-hydrophobic titanium dioxide composite coating according to claim 1, wherein in the step (2), the reaction is carried out at 40-80 ℃ for 4-12 h.
5. The preparation method of the superhydrophobic titanium dioxide composite coating on the surface of the carbon steel according to claim 1, wherein in the step (3), the adhesive is any one of a 3M 75 (RA) adhesive, an acrylate adhesive or a polyurethane adhesive.
6. The preparation method of the superhydrophobic titanium dioxide composite coating on the surface of the carbon steel according to claim 1, wherein in the step (3), the spraying thickness of the coating is 50-500 μm;
the super-hydrophobic TiO 2 The mass ratio of the nano powder to the absolute ethyl alcohol is 0.1:5 to 10.
7. The preparation method of the superhydrophobic titanium dioxide composite coating on the surface of the carbon steel according to claim 1, wherein in the step (3), the suspension is obtained by stirring at room temperature for 10-30 min;
the curing condition is that the curing is carried out for 12 to 24 hours at room temperature.
8. The carbon steel surface super-hydrophobic titanium dioxide composite coating prepared by the method of any one of claims 1 to 7, wherein the composite coating is prepared by synergistically modifying nano TiO by two silane coupling agents 2 The silane coupling agent is KH550 and HDTMS.
9. The use of the superhydrophobic titanium dioxide composite coating on the surface of carbon steel according to claim 8 in corrosion protection of carbon steel.
10. The use of claim 8 wherein said carbon steel comprises Q215, Q235, Q255 or Q275.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210943342.1A CN115232491A (en) | 2022-08-08 | 2022-08-08 | Carbon steel surface super-hydrophobic titanium dioxide composite coating and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210943342.1A CN115232491A (en) | 2022-08-08 | 2022-08-08 | Carbon steel surface super-hydrophobic titanium dioxide composite coating and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115232491A true CN115232491A (en) | 2022-10-25 |
Family
ID=83679051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210943342.1A Pending CN115232491A (en) | 2022-08-08 | 2022-08-08 | Carbon steel surface super-hydrophobic titanium dioxide composite coating and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115232491A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115746629A (en) * | 2022-11-09 | 2023-03-07 | 广州大学 | Heat-resistant solvent-resistant nanocrystalline cellulose coating and preparation method thereof |
| CN116376406A (en) * | 2023-06-05 | 2023-07-04 | 西南石油大学 | TiO (titanium dioxide) 2 /H-SiO 2 EP superhydrophobic composite coating, preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107189656A (en) * | 2017-07-13 | 2017-09-22 | 华北电力大学（保定） | A kind of preparation method of the wear-resisting super-hydrophobic coat based on makrolon |
| CN108744598A (en) * | 2018-06-13 | 2018-11-06 | 洛阳纳诺环保科技有限公司 | A kind of preparation method of the intelligent water-oil separationg film with antifouling property |
| CN113634468A (en) * | 2021-07-20 | 2021-11-12 | 兰州理工大学 | Magnetic firm super-hydrophobic surface and preparation method thereof |
| CN113896430A (en) * | 2021-10-28 | 2022-01-07 | 苏州大学 | Adhesive composite wear-resistant super-hydrophobic coating and preparation method thereof |
-
2022
- 2022-08-08 CN CN202210943342.1A patent/CN115232491A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107189656A (en) * | 2017-07-13 | 2017-09-22 | 华北电力大学（保定） | A kind of preparation method of the wear-resisting super-hydrophobic coat based on makrolon |
| CN108744598A (en) * | 2018-06-13 | 2018-11-06 | 洛阳纳诺环保科技有限公司 | A kind of preparation method of the intelligent water-oil separationg film with antifouling property |
| CN113634468A (en) * | 2021-07-20 | 2021-11-12 | 兰州理工大学 | Magnetic firm super-hydrophobic surface and preparation method thereof |
| CN113896430A (en) * | 2021-10-28 | 2022-01-07 | 苏州大学 | Adhesive composite wear-resistant super-hydrophobic coating and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 高晓辉等: "硅烷复合膜层及应用", 31 July 2020, 黑龙江大学出版社, pages: 31 - 33 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115746629A (en) * | 2022-11-09 | 2023-03-07 | 广州大学 | Heat-resistant solvent-resistant nanocrystalline cellulose coating and preparation method thereof |
| CN115746629B (en) * | 2022-11-09 | 2024-03-19 | 广州大学 | Heat-resistant solvent-resistant nanocrystalline cellulose coating and preparation method thereof |
| CN116376406A (en) * | 2023-06-05 | 2023-07-04 | 西南石油大学 | TiO (titanium dioxide) 2 /H-SiO 2 EP superhydrophobic composite coating, preparation method and application thereof |
| CN116376406B (en) * | 2023-06-05 | 2024-02-09 | 西南石油大学 | TiO (titanium dioxide) 2 /H-SiO 2 EP superhydrophobic composite coating, preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115232491A (en) | Carbon steel surface super-hydrophobic titanium dioxide composite coating and preparation method and application thereof | |
| CN108003753B (en) | Self-cleaning super-hydrophobic long-acting anticorrosive coating and preparation method thereof | |
| Abdollahi et al. | Anticorrosive coatings prepared using epoxy–silica hybrid nanocomposite materials | |
| Mahadik et al. | Silica based superhydrophobic coating for long-term industrial and domestic applications | |
| CN108441085B (en) | Water-based super-amphiphobic long-acting anticorrosive coating and preparation method thereof | |
| CN105647290B (en) | The super hydrophobic coating and its preparation and application that can be used under water | |
| Gong et al. | Spray fabrication of superhydrophobic coating on aluminum alloy for corrosion mitigation | |
| Xu et al. | Fabrication of repairable superhydrophobic surface and improved anticorrosion performance based on zinc-rich coating | |
| CN112239625A (en) | Silicon dioxide-graphene oxide/polyurethane acrylic resin anticorrosion coating | |
| CN109731758A (en) | A kind of method that plasma treatment aluminum alloy surface prepares wear-resisting resistant corrosion-resistant finishes | |
| CN108047908A (en) | A kind of steel structure anti-corrosion process | |
| CN109897413A (en) | Aqueous inorganic paint and preparation method | |
| CN110003727A (en) | A kind of long-acting water-based metal heat-insulating anti-corrosive coating | |
| Yang et al. | Waterborne superhydrophobic coating with abrasion and corrosion resistant capabilities | |
| CN105331981A (en) | Composite metal surface treatment agent based on conducting polymer | |
| CN109909131B (en) | Preparation method of graphene-based steel anticorrosive coating | |
| Zhou et al. | Preparation of TiO2 superhydrophobic composite coating and studies on corrosion resistance | |
| CN114561138B (en) | Super-hydrophobic corrosion-resistant antibacterial nano paint, coating and preparation method thereof | |
| CN116904089A (en) | Steel surface anticorrosive paint and preparation method and application thereof | |
| Gandhi et al. | Effect of the degree of hydrolysis and condensation of bis-[triethoxysilylpropyl] tetrasulfide on the corrosion protection of coated aluminum alloy 2024-T3 | |
| Li et al. | Study of nano-ZnO improvement of the mechanical properties and corrosion resistance of modified-SiO 2/PTFE superhydrophobic nanocomposite coatings by one-step spraying | |
| CN114045477A (en) | Stainless steel surface anticorrosion treatment process | |
| CN116376406B (en) | TiO (titanium dioxide) 2 /H-SiO 2 EP superhydrophobic composite coating, preparation method and application thereof | |
| He et al. | Corrosion resistance and adhesive performance of a novel phytic acid-triethoxyvinylsilane-zinc hybrid chemical conversion film on steel | |
| Ai et al. | Facile Preparation of a Robust Superhydrophobic SiO2/Epoxy Composite Coating with Favorable Corrosion and Scale Inhibition Performance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |