KR20220020330A - Composition and manufacturing method of corrosion-resistant multifunctional paint - Google Patents

Abstract

The multifunctional coating method includes cleaning a surface, applying a corrosion-resistant alloy coating layer to the surface, and applying an oleophobic hydrophobic composite coating over the corrosion-resistant alloy coating. Oil and gas pipes may have an inner surface of a multi-functional coating applied using a multi-functional coating method, an inner oleophobic-hydrophobic composite coating, a corrosion-resistant alloy coating under the inner oleophobic composite coating, a corrosion-resistant alloy coating untreated, or other metallic substrates.

Description

Composition and manufacturing method of corrosion-resistant multifunctional paint

This application relates generally to surface treatments and coatings to prevent scale build-up and H ₂ S and CO ₂ induced corrosion, and to provide sweet gas and sour gas resistance and water/oil repellency.

There are not many commercial coatings available for corrosion resistance at high pressures and high temperatures with multiphase flow in the presence of sweet and sour gases. Sour gas is any gas, but it is often a natural gas that contains significant amounts of H ₂ S. Therefore, these conditions are commonly encountered in oil and gas drilling and exploration operations. Deep-sea and onshore oil and gas drilling typically involves pipeline temperatures of 200-250°C and pressures above 100 psi and up to 20000 psi.

Corrosion-resistant alloy coatings are difficult to apply inside pipelines and in inaccessible areas, and the process is not scalable. Existing corrosion-resistant coating technologies lack H ₂ S and CO ₂ corrosion resistance. Most commercial solutions are based on polymeric or composite coatings to prevent corrosion and H ₂ S/CO ₂ attack, but provide minimal protection if the coating is damaged. The use of polymer-based coatings only provides temporary resistance to these gases that are not maintained at high pressures and high temperatures.

A need exists for improved corrosion-resistant surface treatments and coatings for use in the presence of sweet and sour gases and at high temperatures and pressures.

Both the following summary and detailed description are exemplary and explanatory, and it is to be understood that they are intended to provide a further description of the invention as claimed. The following summary or description is not intended to define or limit the scope of the invention to the specific features recited in the summary or description. In certain embodiments, disclosed embodiments may include one or more of the features described herein.

The new corrosion-resistant coating can maintain corrosion resistance in high temperature, high pressure, corrosive, sweet or sour gas environments. High water repellency also helps to improve scale resistance and other beneficial results. The coating may include a base metal corrosion resistant layer comprising nickel, chromium, cobalt and/or other corrosion resistant alloys and a top layer of a polymer composite coating capable of providing low surface energy to reduce drag in the multiphase flow regime. Coatings are useful in oil and gas drilling and exploration, as well as marine, aviation, automotive, electronics, home, construction and transportation applications. Advantages of the new coating include durable corrosion resistance to metal surfaces and easy application. Advantages of the new coating include durable corrosion resistance to metal surfaces, H ₂ S and CO ₂ resistance for easy application in complex components and hard-to-reach areas, especially inside pipelines, pumps and valves, and at high pressures and temperatures. It has durable performance.

New multifunctional coatings are used to improve the protection of metal surfaces. The coating is applied by applying a thin layer of a corrosion-resistant alloy coating applied to the surface and then using, for example, electroless, brush plating or electroplating methods, nanoparticles that are resistant to water/oil and impermeable/inert to sweet and sour gases. and applying a composite coating of an embedded perfluorinated polymer. One of the best ways to apply a corrosion-resistant alloy coating is discussed in detail later.

The top coating of the new multifunctional coating is film-free and may consist of fluorinated nanoparticles of known commercial polymers (eg fluorinated silica nanoparticles). Functional groups (eg hydroxyl, epoxies, acrylics, amines, etc.) may be applied to the corrosion-resistant alloy prior to applying the top coating to improve durability.

Each floor has its own unique function. The first alloy coating on the inside prevents sour gas attack, and the top composite layer acts as an oil and water repellent. The top layer may decompose at high temperature and pressure so that the surface underneath it may be exposed to an environment containing oil, water and/or gas. Steels commonly used in oil and gas pipelines and other applications are highly susceptible to sour gas corrosion and experience immediate corrosion upon direct exposure. However, the corrosion-resistant alloy coating under the composite layer prevents this from happening. The multifunctional coating provides H ₂ S resistance and a simple and scalable double-layer surface protection of water and oil repellency.

In some alternative embodiments and certain applications, the corrosion-resistant alloy layer may be used alone with sufficient strength to provide substantial corrosion protection.

In an embodiment, the new multifunctional coating method comprises cleaning the surface, applying a corrosion-resistant alloy coating layer to the surface, and applying an oleophobic hydrophobic composite coating over the corrosion-resistant alloy coating. In some embodiments, the method also includes modifying and functionalizing the corrosion-resistant alloy coating layer by chemical and/or electrochemical etching and attachment of functional groups prior to application of the oleophobic-hydrophobic composite coating.

In various embodiments, the functional group is a hydroxyl, epoxy, acrylic or amine functional group.

In various embodiments, surface cleaning includes shot blasting and/or acid/base cleaning.

In various embodiments the corrosion-resistant alloy is applied by at least one of electroless plating, brush plating and electroplating.

In some embodiments the oleophobic-hydrophobic composite coating comprises corrosion-resistant nanoparticles embedded in perfluorinated and/or fluorinated polymers.

In some embodiments the surface is a metal surface, and in some embodiments is part of a heat exchanger. In some embodiments the heat exchanger is located in a power plant.

In some embodiments, the corrosion-resistant alloy includes at least one of nickel, nickel-phosphorus, nickel-cobalt, nickel-boron, nickel-PTFE, and chromium.

In some embodiments the oleophobic-hydrophobic composite coating comprises ceramic nanoparticles embedded in a coating matrix. In some embodiments the ceramic nanoparticles comprise at least one of silica, alumina, titania, and ceria nanoparticles. In some embodiments, the embedded nanoparticles are perfluoro octyl trichloro silane, perfluoro octyl phosphonic acid, perfluoro polyhedral oligomeric silsesquioxane (POSS), trichloro octadecyl, trichloro octyl silane, perfluoro functionalized by attaching at least one of siloxanes, fluorohydrocarbons, fluorinated silanes, fluorinated acids, amines, phosphoric acids, ethers, acrylates, sulfonates and/or fluorinated or non-fluorinated monomers.

In some embodiments the oleophobic-hydrophobic composite coating comprises metallic nanoparticles embedded in a coating matrix. In some embodiments the metallic nanoparticles comprise at least one of nickel, copper, and iron nanoparticles. In some embodiments the oleophobic-hydrophobic composite coating comprises a perfluorinated polymer.

A novel applicator for applying a multi-functional coating to a metal surface applies the multi-functional coating according to a method comprising cleaning the surface, applying a layer of a corrosion-resistant alloy coating to the surface, and applying an oleophobic composite coating over the corrosion-resistant alloy coating. . In some embodiments the oleophobic-hydrophobic composite coating comprises metallic nanoparticles embedded in a coating matrix. In some embodiments, the method also includes modifying and functionalizing the corrosion-resistant alloy coating layer by chemical and/or electrochemical etching and attachment of functional groups prior to application of the oleophobic-hydrophobic composite coating. In various embodiments, the functional group is a hydroxyl, epoxy, acrylic or amine functional group. In various embodiments, surface cleaning includes shot blasting and/or acid/base cleaning. In various embodiments the corrosion-resistant alloy is applied by at least one of electroless plating, brush plating and electroplating. In some embodiments the oleophobic-hydrophobic composite coating comprises corrosion-resistant nanoparticles embedded in perfluorinated and/or fluorinated polymers. In some embodiments the surface is a metal surface, and in some embodiments is part of a heat exchanger. In some embodiments the heat exchanger is located in a power plant. In some embodiments, the corrosion-resistant alloy includes at least one of nickel, nickel-phosphorus, nickel-cobalt, nickel-boron, nickel-PTFE, and chromium.

In some embodiments the oleophobic-hydrophobic composite coating comprises ceramic nanoparticles embedded in a coating matrix. In some embodiments the ceramic nanoparticles comprise at least one of silica, alumina, titania, and ceria nanoparticles. In some embodiments, the embedded nanoparticles are perfluoro octyl trichloro silane, perfluoro octyl phosphonic acid, perfluoro polyhedral oligomeric silsesquioxane (POSS), trichloro octadecyl, trichloro octyl silane, perfluoro functionalized by attaching at least one of siloxanes, fluorohydrocarbons, fluorinated silanes, fluorinated acids, amines, phosphoric acids, ethers, acrylates, sulfonates and/or fluorinated or non-fluorinated monomers.

In some embodiments the oleophobic-hydrophobic composite coating comprises metallic nanoparticles embedded in a coating matrix. In some embodiments the metallic nanoparticles comprise at least one of nickel, copper, and iron nanoparticles. In some embodiments the oleophobic-hydrophobic composite coating comprises a perfluorinated polymer.

In some embodiments, the applicator contains a corrosion-resistant alloy coating.

New or existing oil and gas pipes have an interior surface with a multifunctional coating applied to the interior surface, including an interior oleophobic-hydrophobic composite coating, a corrosion-resistant alloy coating under an interior oleophobic-hydrophobic composite coating, and untreated pipe material under a corrosion-resistant alloy coating.

Multifunctional anti-corrosion coatings can also be applied to metal surfaces other than steel or stainless steel alloys (eg aluminum, copper and/or chromium based alloys).

The new corrosion-resistant coating can maintain corrosion resistance in high temperature, high pressure, corrosive, sweet or sour gas environments. High water repellency also helps to improve scale resistance and other beneficial results. The coating may include a base metal corrosion resistant layer comprising nickel, chromium, cobalt and/or other corrosion resistant alloys and a top layer of a polymer composite coating capable of providing low surface energy to reduce drag in the multiphase flow regime. Coatings are useful in oil and gas drilling and exploration, as well as marine, aviation, automotive, electronics, home, construction and transportation applications. Advantages of the new coating include durability, corrosion resistance to metal surfaces, and easy application. Advantages of the new coating include durable corrosion resistance to metal surfaces, H ₂ S and CO ₂ resistance for easy application in complex components and hard-to-reach areas, especially inside pipelines, pumps and valves, and at high pressures and temperatures. It has durable performance.

The accompanying drawings, which are incorporated in and form a part of this specification, illustrate exemplary embodiments and, together with the description, additionally enable those skilled in the art to make and use these and other embodiments that will be apparent to those skilled in the art. to provide.
1 is a flow diagram of a corrosion resistant multifunctional coating process in one embodiment.
2A-2E are schematic diagrams illustrating changes occurring in a metal surface during a corrosion-resistant multifunctional coating process in one embodiment.
FIG. 2F is a detailed view of area A of FIG. 2E.
3A-3F are schematic diagrams illustrating changes occurring in a metal surface during a corrosion-resistant multifunctional coating process in another embodiment.
Fig. 3G is a detailed view of area B of Fig. 3F;
4A-4C are a series of images showing a steel sample undergoing a corrosion-resistant multifunctional coating process in one embodiment.
5A-5B illustrate a method of applying a corrosion-resistant alloy coating.

Compositions and methods for making corrosion-resistant multifunctional coatings on ferrous and non-ferrous alloys for high pressure/high temperature applications will now be disclosed in terms of various exemplary embodiments. This specification discloses one or more embodiments incorporating features of the present invention. References to the described embodiment(s) and the specification to “one embodiment,” “an embodiment,” “an exemplary embodiment,” etc., may indicate that the described embodiment(s) may include a particular feature, structure, or characteristic. indicates Such phrases are not necessarily referring to the same embodiment. When a particular feature, structure, or characteristic is described in connection with an embodiment, one of ordinary skill in the art will be able to perform that feature, structure, or characteristic in connection with another embodiment, whether or not explicitly described.

In the various drawings, the same reference numbers may be used for similar elements having similar functions in different drawings. The numbers are not proportional. The described embodiments, detailed configurations, and elements are provided merely to aid a comprehensive understanding of the present invention. Accordingly, it will be apparent that the present invention may be practiced in various ways and does not require any of the specific features set forth herein. In addition, detailed descriptions of well-known functions and configurations will be omitted because they may unnecessarily obscure the present invention. All signal arrows in the drawings/drawings are to be regarded as illustrative only and not restrictive unless specifically stated otherwise.

Although terms such as first, second, etc. may be used herein to describe various elements, it will be understood that these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component. As used herein, the term “and/or” includes all combinations of one or more of the related listed items. As used herein, “at least one of A, B, and C” refers to A or B or C or any combination thereof. As used herein, the singular forms of a word include the plural and vice versa unless the context clearly dictates otherwise. Thus, references to "a", "an" and "the" generally include the plural of each term.

It should also be noted that, in some alternative implementations, the recited functions/acts may occur out of the order recited in the figures. For example, two figures shown in succession may actually be executed substantially simultaneously or sometimes in reverse order depending on the functions/acts involved.

The words "comprise", "comprises" and "comprising" are to be construed inclusively and not exclusively. Likewise, the terms "comprise", "comprising" and "or" should all be construed inclusively unless the context clearly prohibits it. The terms “comprising” or “comprising” are intended to include embodiments encompassed by the terms “consisting essentially of” and “consisting of”. Similarly, the term “consisting essentially of” is intended to include embodiments encompassed by the term “consisting of”. Although having distinct meanings, the terms “comprising,” “having,” “comprising,” and “consisting of,” may be used interchangeably throughout the present description.

Wherever "for example," "such as," "comprising," etc. are used herein, it is to be understood that the phrase "and without limitation" is followed unless explicitly stated otherwise.

"Generally" or "optionally" means that the hereinafter described event or circumstance may or may not occur, and the description includes instances where the event or circumstance occurs and instances where it does not.

1 is a flow diagram of a corrosion resistant multifunctional coating process in one embodiment. First, the surface to be coated is cleaned 100 , for example by shot blasting, acid/base cleaning, and/or other known techniques. Next, a corrosion-resistant alloy coating is applied (102) using techniques such as, for example, electroless plating, brush plating, electroplating, and the like. Then, the surface of the corrosion-resistant alloy coating is subjected to chemical and/or electrochemical etching and functional group deposition. Finally, a multifunctional oil/water repellent polymer composite coating is applied, such as, for example, corrosion-resistant nanoparticles embedded in a perfluorinated polymer (106).

2A-2F are schematic diagrams illustrating changes occurring in a metal surface 200 during a corrosion-resistant multifunctional coating process in one embodiment. Starting with the metal surface 200 as shown in FIG. 2A I, the surface is first cleaned 201, leaving a clean top surface 202 of metal for application of the coating as shown in FIG. 2B. Next, a corrosion-resistant alloy is deposited 203 on the clean top surface, resulting in a metal surface having a top layer 204 of the corrosion-resistant alloy as shown in FIG. 2C. A multifunctional composite oleophobic coating 206 is applied to the corrosion-resistant alloy layer 207 to form a final top layer on the surface as shown in FIG. 2D . The final surface comprises a lower layer of unaltered metal 200, an intermediate layer of corrosion-resistant alloy coating 204, and an upper layer of multifunctional composite oleophobic coating 206 as shown in FIG. 2E and detailed FIG. 2F. do.

3A-3G are schematic diagrams illustrating changes occurring in metal surface 200 during a corrosion-resistant multifunctional coating process in one embodiment. This schematic is similar to FIGS. 2A-2F, but with the addition of the functional group attachment step shown in FIG. 3D, prior to application of the multifunctional composite oleophobic coating 206 for improved adhesion and durability as shown in FIG. 3E. Functional groups 205 are attached to the corrosion resistant alloy as a nanoparticle coating.

4A-4C are a series of images showing a steel sample undergoing a corrosion-resistant multifunctional coating process in one embodiment. First, FIG. 4A shows a bare steel sample 400 that is 2 inches wide. 4B next shows the steel after electroless nickel deposition has been performed on the steel, providing a top layer of corrosion-resistant nickel alloy 402 . 4C shows a steel sample having a top layer of corrosion-resistant composite coating 404 after the multifunctional composite oleophobic coating has been applied.

It should be understood that the coatings described herein can be applied to a variety of metallic surfaces in industrial environments, including, but not limited to, geometrically complex surfaces located in inaccessible or inaccessible areas. Such surfaces include, by way of purely non-limiting example, the inner and outer surfaces of heat exchangers inside a power plant. It should be further understood that more than one method may be used to apply a coating embodying the present invention to a given surface, such as, for example, spraying, brushing, and the like.

Exemplary application method

One good way to apply a corrosion-resistant alloy coating is a brush plating process that involves packaging an ionic and/or non-ionic electrolyte, such as a copper electroplating solution, into a formable solid form, which requires electrolyte recycling or immersion of the brush-plated rod. don't in electrolyte solution. By packaging the electrolyte in a solid form, there is no need to use a liquid electrolyte in the brush plating process. Water is sprayed on the electrode to maintain conductivity.

A solid electrolyte having a precursor, a binder and a medium in solid or semi-solid form and a tool having the product bound to an electrode/electrolyte assembly for electrochemical treatment of a substrate can be used. The solid electrolyte may include metal salts, nanoparticles, organometallic precursors, polymers, or ionic organic compounds. Binders may include polymeric polyethylene oxide, polyvinyl pyrrolidone, silicone, inorganic binders, silicates, and surfactants or cetyltrimethyl ammonium bromide. The medium may include an aqueous or non-aqueous solvent, an ionic liquid or an aprotic solvent. A solid electrolyte is a formable or conformable solid or a semi-solid in a formable form. The electrode may be a conductive metal or non-metal wire, rod, tube foil, plate, sheet, foam or mesh and may further have a DC power connection to the electrode. The handle is connected to the electrode. The DC power connection is also connected to the board.

The solid electrolyte material is an electroplating, electropolishing, electrowinning, electrolytic etching or anodizing electrochemical material, and the electrochemical treatment includes electrolytic plating, electropolishing, electrowinning, electrochemical etching or anodizing. The present invention provides an ionic or non-ionic electrolyte in formable solid or semi-solid form. An ionic or non-ionic electrolyte is a mixture of a precursor, a binder and a medium. The solid electrode is formed from a mixture of an electrochemical material and a binder. The solid electrolyte may be attached to the electrode, a DC connector applied to the electrode, and a handle provided on the electrode. A DC connector is applied to the substrate and the substrate is wetted with a solvent. The process is completed by holding the electrode and the solid electrolyte by the handle and moving the solid electrolyte in contact with the wet surface of the substrate. Wetting may include spraying a solvent mist onto the substrate.

Applying a DC connector to the substrate, holding the electrode and the solid electrolyte by the handle, and moving the wet solid electrolyte or solid electrolyte in contact with the wet surface of the substrate to transfer the precursor from the solid electrolyte to the substrate surface. .

Precursors include metal salts, copper chloride, chromium chloride, nickel sulfate, organic compounds, pyridine, pyrrole, aniline, organometallic compounds, trimethylgallium, trimethylindium, trimethylaluminum, and the like. The solid electrolyte precursor and precursors are transferred from the solid electrolyte to the substrate surface by moving the solid electrolyte over the substrate surface using a handle when the surface or electrolyte has been slightly wetted with a solvent.

The electrochemical is mixed with the fatty acid surfactant and polymer binder in a blender with or without solvent medium, the blended mixture is poured into a mold, and the mixture is dried to form a solid or semi-solid electrolyte form for attachment to electrodes.

In a blender with or without solvent medium, the electrochemical material is mixed with the fatty acid surfactant and polymeric binder, and the mixture is poured into a mold for chemical or physical crosslinking, thereby forming a solid or semi-solid electrolyte pad. In a blender with or without a solvent medium, the electrochemicals are mixed with the fatty acid surfactant and polymer binder, the blended mixture is poured into a mold with electrodes, the mixture is dried, or solid or semi-solid electrolyte/electrode assemblies are formed by chemical or physical crosslinking. to form

Solid electrolytes containing high concentrations of metals (copper, chromium, nickel, etc.) can release metal ions by rubbing and applying an electric potential between the electrode and the substrate only when the electrolyte is sufficiently hydrated. A sufficient amount of metal ions can be stored in an electrolyte form and delivered to a desired location during the plating process. Solid electrolytes can be attached to existing rods and covered with cloth and brush plating, which can be done similarly to conventional practice.

In one particular example shown in Figures 5A and 5B, a commercial copper surfactant solution containing nearly 10 wt % copper octanoate is used without purification. A known amount of polymer binder (polyethylene oxide) is mixed with a solution of copper octanoate in water for 30 minutes using a homogenizer. When the polymer-copper-surfactant solution becomes homogeneous, pour the homogenized solution into a plastic 2"x2"x2" cube mold and dry in a vacuum oven at 80°C for two days.

The prepared solid copper electrolyte polymer (1) is used for brush plating copper onto a steel coupon (3). A DC potential is applied between the brush electrode 4 covered with the solid copper electrolyte 1, that is, the steel plate 3 and the copper rod, as shown in Figs. 5A and 5B. The copper electrolyte (1) is sometimes hydrated with a few drops (1-2 mL) of water to maintain electrical conductivity. or water mist is sprayed onto the substrate. Copper is deposited on the steel plate 3 by brushing the copper electrolyte 1 over the steel plate 3 .

These and other objects and features of the present invention are apparent from the disclosure, including the foregoing and the pending written specification.

The invention is not limited to the specific embodiments detailed above. Those skilled in the art will recognize that other arrangements may be devised. The invention includes all possible combinations of the various features of each disclosed embodiment. One or more of the elements described herein in connection with various embodiments may be implemented in a more separate or integrated manner than explicitly described, and may be removed or rendered inoperable in certain cases useful depending on the particular application. . Although the invention has been described with reference to specific exemplary embodiments, modifications and variations of the invention may be made without departing from the scope of the invention as set forth in the following claims.

1: Copper soap
3: Steel
4: Brush electrode covered with copper soap
6: Copper electrolyte solution

Claims (23)

A method of applying a multifunctional coating to a metal surface, the method comprising:
cleaning the metal surface;
applying a corrosion-resistant alloy coating layer to the metal surface by at least one of electroless plating, brush plating and electroplating;
modifying and functionalizing the corrosion-resistant alloy coating layer by chemical and/or electrochemical etching and attachment of hydroxyl, epoxy, acrylic or amine functional groups prior to application of the oleophobic-hydrophobic composite coating; and
applying an oleophobic composite coating over the corrosion-resistant alloy coating; containing,
How to apply a multifunctional coating to a metal surface. The method according to claim 1,
wherein the metal surface is part of a heat exchanger;
How to apply a multifunctional coating to a metal surface. 3. The method according to claim 2,
The heat exchanger is located in the power plant,
How to apply a multifunctional coating to a metal surface. The method according to claim 1,
The corrosion-resistant alloy comprises at least one of nickel, nickel-phosphorus, nickel-cobalt, nickel-boron, nickel-PTFE and chromium,
How to apply a multifunctional coating to a metal surface. The method according to claim 1,
wherein the oleophobic-hydrophobic composite coating comprises perfluorinated and/or corrosion-resistant nanoparticles embedded in a fluorinated polymer;
How to apply a multifunctional coating to a metal surface. The method according to claim 1,
wherein the oleophobic-hydrophobic composite coating further comprises ceramic nanoparticles embedded in a coating matrix;
How to apply a multifunctional coating to a metal surface. 7. The method of claim 6,
The ceramic nanoparticles comprising at least one of silica, alumina, titania, and ceria nanoparticles,
How to apply a multifunctional coating to a metal surface. 7. The method of claim 6,
Perfluoro octyl trichloro silane, perfluoro octyl phosphonic acid, perfluoro polyhedral oligomeric silsesquioxane (POSS), trichloro octadecyl, trichloro octyl silane, perfluorosiloxane, fluorohydrocarbons, fluorinated silanes functionalizing the embedded nanoparticles by attaching at least one of a fluorinated acid, an amine, a phosphoric acid, an ether, an acrylate, a sulfonate, and/or a fluorinated or non-fluorinated monomer.
How to apply a multifunctional coating to a metal surface. The method according to claim 1,
wherein the oleophobic-hydrophobic composite coating further comprises metallic nanoparticles embedded in a coating matrix;
How to apply a multifunctional coating to a metal surface. 10. The method of claim 9,
The metallic nanoparticles comprising at least one of nickel, copper and iron nanoparticles,
How to apply a multifunctional coating to a metal surface. The method according to claim 1,
wherein the oleophobic-hydrophobic composite coating comprises a perfluorinated polymer;
How to apply a multifunctional coating to a metal surface. In the applicator for applying a multi-functional coating to a metal surface, the applicator applied according to the multi-functional coating method,
cleaning the metal surface;
applying a corrosion-resistant alloy coating layer to the metal surface by at least one of electroless plating, brush plating and electroplating;
modifying and functionalizing the corrosion-resistant alloy coating layer by chemical and/or electrochemical etching and attachment of hydroxyl, epoxy, acrylic or amine functional groups prior to application of the oleophobic-hydrophobic composite coating; and
applying the oleophobic-hydrophobic composite coating over the corrosion-resistant alloy coating; including,
wherein the applicator contains the oleophobic-hydrophobic composite coating;
Applicator for applying multifunctional coatings to metal surfaces. 13. The method of claim 12,
wherein the metal surface is part of a heat exchanger,
Applicator for applying multifunctional coatings to metal surfaces. 14. The method of claim 13,
The heat exchanger is located in the power plant,
Applicator for applying multifunctional coatings to metal surfaces. 13. The method of claim 12,
wherein the corrosion-resistant alloy comprises at least one of nickel, nickel-phosphorus, nickel-cobalt, nickel-boron, nickel-PTFE, and chromium;
Applicator for applying multifunctional coatings to metal surfaces. 13. The method of claim 12,
wherein the oleophobic-hydrophobic composite coating comprises corrosion-resistant nanoparticles embedded in perfluorinated and/or fluorinated polymers;
Applicator for applying multifunctional coatings to metal surfaces. 13. The method of claim 12,
wherein the oleophobic-hydrophobic composite coating further comprises ceramic nanoparticles embedded in a coating matrix.
Applicator for applying multifunctional coatings to metal surfaces. 18. The method of claim 17,
The ceramic nanoparticles comprising at least one of silica, alumina, titania and ceria nanoparticles,
Applicator for applying multifunctional coatings to metal surfaces. 18. The method of claim 17, wherein the method
Perfluoro octyl trichloro silane, perfluoro octyl phosphonic acid, perfluoro polyhedral oligomeric silsesquioxane (POSS), trichloro octadecyl, trichloro octyl silane, perfluorosiloxane, fluorohydrocarbons, fluorinated silanes functionalizing the embedded nanoparticles by attaching at least one of a fluorinated acid, an amine, a phosphoric acid, an ether, an acrylate, a sulfonate, and/or a fluorinated or non-fluorinated monomer.
Applicator for applying multifunctional coatings to metal surfaces. 13. The method of claim 12, wherein the oleophobic-hydrophobic composite coating further comprises metallic nanoparticles embedded in a coating matrix.
Applicator for applying multifunctional coatings to metal surfaces. 21. The method of claim 20,
The metallic nanoparticles comprising at least one of nickel, copper and iron nanoparticles,
Applicator for applying multifunctional coatings to metal surfaces. 13. The method of claim 12,
wherein the oleophobic-hydrophobic composite coating comprises a perfluorinated polymer;
Applicator for applying multifunctional coatings to metal surfaces. 13. The method of claim 12,
wherein the applicator contains the corrosion-resistant alloy coating;
Applicator for applying multifunctional coatings to metal surfaces.

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