TW201540868A - Nano surface treatment agent and treatment method for covering it on metal material surface - Google Patents

Abstract

The present invention provides a treatment method for covering a nano surface treatment agent on a metal material surface, comprising the following steps: first, removing oils and impurities from surface of a material, and then covering the nano surface treatment agent on the material surface, so that the nano surface treatment agent can be chemically bonded to the surface of the material to form a protective film, wherein the nano surface treatment agent is prepared by mixing at least one kind of alkoxide, water and an alkaline compound, and the alkaline compound catalyzes an alkoxide to undergo a condensation reaction with water for forming a nano solution, which has a high flash point property, and the surface treatment agent further comprises resins, auxiliaries and waxes. By chemically bonding a nano surface treatment agent to the material surface, this invention increases adhesion of a protective film to the material surface, and at the same time achieves effects of anti-corrosion and wear-resistance.

Description

Nano surface treatment agent and treatment method thereof covering the surface of metal material

The invention relates to a surface treatment method for a metal material, in particular to coating a surface treatment agent on a surface of a metal material to produce a protective film, and enhancing the bonding strength between the protective film and the surface of the material to achieve corrosion resistance and resistance. Surface treatment method for grinding effect.

Since the metal is easily oxidized, a general metal article usually undergoes a surface treatment step to form a protective film on the surface of the metal article to avoid metal oxidation and facilitate subsequent processing.

The metal surface treatment method currently used includes chemical conversion or acid placement in an acid solution to form a rough porous metal oxide layer by anodizing, so that it can be processed after subsequent treatment. Adhesive or lacquer with an adhesive.

The acid currently used is a chemical conversion treatment step, which first removes the surface oil after the metal surface material is removed by a degreasing step, and then passes through a water washing step to ensure the cleanness of the metal surface, and then removes the release agent by a pickling step (metal removal) The mold release agent used in the mold, and then the water wash step is removed by a water washing step, and then the film formation treatment is performed. The film formation treatment process immerses the metal in a film forming agent to make the film into a porous film. The metal surface reacts to form a film to achieve the film protection function, so that the metal can achieve the physical adhesion effect after the subsequent painting, and finally, after a water washing step and a water cutting drying step, a metal with a film protective layer can be obtained. .

The above method has been used for many years, although it has certain effects, but the steps are too complicated, and at the same time, since the acid used in the pickling process mostly contains heavy metals such as: chromium ions (hexavalent chromium), vanadium ions, manganese ions, etc., It causes great pollution to the environment and cannot reduce production costs.

In view of the deficiencies of the prior art and various inconveniences, the object of the present invention is to provide a treatment method for covering a surface of a metal material with a surface treatment agent, so that a surface of the metal material is chemically bonded to form a protective film for preventing corrosion and abrasion. And mainly used on the surface of metal materials, especially fastener surfaces.

In order to achieve the above object, the nano surface treatment agent of the present invention covers the surface of the metal material, and the method comprises the following steps: pretreatment, removing oil stains and impurities on the surface of a metal material; and activating treatment to soak the metal material in the acid. Or activation in an alkaline solution to remove oxides on the surface of the material and form a hydroxyl group; film treatment, coating the nano surface treatment agent on the passivation layer by conventional techniques such as immersion plating, spray coating or roller coating Surface, until the nano surface treatment agent chemically bonds with the surface of the metal material to form a protective film; wherein the nano surface treatment agent is mixed with at least one alkoxide, water and a basic compound, and is alkaline The compound catalyzes the alkoxide and water a nano-solution formed by a condensation reaction, wherein the nano surface treatment agent further comprises a resin; and a curing treatment, wherein the protective film is heated by a heating means to form a resist layer.

Preferably, the resin is selected from the group consisting of an acid alcohol resin, an amino resin, a phenol resin, an acrylic resin, an epoxy resin, a polyurethane resin, a polyester resin, a polyamide resin, a polyurethane resin, and an acrylic resin. Resin, oxime resin, fluorocarbon resin, polyurea resin, polycarbonate resin, polyacetylene resin, polyethylene glycol resin, polyvinylpyrrolidone, polyolefin resin, polyvinyl acetate, and combinations thereof.

More preferably, the nano surface treatment agent further comprises an auxiliary agent selected from the group consisting of a leveling agent, a dispersing agent, an antifoaming agent, a thickening agent, an anti-cratering agent, a drying accelerator, and a bactericide.

Preferably, the alkoxide has the general formula (OR) _x MOM(OR) _x , (R) _y (OR) _xy MOM(OR) _xy (R) _y , (OR) _x M, M (OR And _xy (R) _y or (OR) _x MOM(OR) _x ; wherein R is selected from the group consisting of alkyl, alkenyl, aryl, haloalkyl and hydrogen; wherein M is selected from the group consisting of Groups: aluminum, iron, titanium, zirconium, hafnium, tantalum, niobium, tantalum, platinum, indium, tin, gold, antimony, copper, and antimony; wherein x>y, and x is 2, 3, 4, or 5, y is 2, 3 or 4.

Preferably, the basic compound is selected from the group consisting of sodium hydroxide, potassium hydroxide, aqueous ammonia, sodium carbonate, potassium carbonate, sodium hydrogencarbonate, potassium hydrogencarbonate, primary amine, secondary amine, tertiary amine, sodium ethoxide and Its combination.

More preferably, the nano surface treatment agent further comprises a wax selected from the group consisting of an aqueous wax, an oil wax and a synthetic wax, and the resist formed by the curing process is adjusted by changing the amount of the wax added. Surface layer Friction coefficient.

Further, the nano surface treatment agent of the present invention is a nanometer solution formed by mixing at least one alkoxide, water and a basic compound, and catalyzing a condensation reaction of an alkoxide with water by the basic compound, and The nano surface treatment agent further contains a resin.

Preferably, the alkoxide has the general formula (OR) _x MOM(OR) _x , (R) _y (OR) _xy MOM(OR) _xy (R) _y , (OR) _x M, M (OR And _xy (R) _y or (OR) _x MOM(OR) _x ; wherein R is selected from the group consisting of alkyl, alkenyl, aryl, haloalkyl and hydrogen; wherein M is selected from the group consisting of Groups: aluminum, iron, titanium, zirconium, hafnium, tantalum, niobium, tantalum, platinum, indium, tin, gold, antimony, copper, and antimony; wherein x>y, and x is 2, 3, 4, or 5, y is 2, 3 or 4.

Preferably, the basic compound is selected from the group consisting of sodium hydroxide, potassium hydroxide, aqueous ammonia, sodium carbonate, potassium carbonate, sodium hydrogencarbonate, potassium hydrogencarbonate, primary amine, secondary amine, tertiary amine, sodium ethoxide and Its combination.

More preferably, the resin is selected from the group consisting of an acid alcohol resin, an amino resin, a phenol resin, an acrylic resin, an epoxy resin, a polyurethane, a polyester, a polyamide, a polyurethane resin, an acrylic resin, and a hydrazine resin. Oxygen resin, fluorocarbon resin, polyurea resin, polycarbonate resin, polyacetylene resin, polyethylene glycol resin, polyvinylpyrrolidone, polyolefin resin, polyvinyl acetate, and combinations thereof.

Most preferably, the nano surface treatment agent further comprises an auxiliary agent selected from the group consisting of a leveling agent, a dispersing agent, an antifoaming agent, a thickening agent, an anti-cratering agent, a drying accelerator, and a bactericide.

More preferably, the nano surface treatment agent further comprises a wax selected from the group consisting of an aqueous wax, an oil wax, and a synthetic wax.

Further, the method for treating a fastener by using the nano surface treating agent of the present invention comprises the following steps: (a) degreasing, which treats a fastener material through a degreasing agent to remove surface oil; (b) etching treatment The surface of the fastener material is acid-etched with an acidic solution, the surface of the fastener material is exposed to metallic primary colors, gray or black, and the surface of the fastener material is activated; (c) electroplating treatment, Forming a light metal layer on the surface of the fastener material by electroplating; (d) passivating treatment, the surface of the fastener material having the light metal layer is coated with a passivation plating solution until the passivation plating solution is on the light metal layer Forming a passivation layer on the surface; (e) film treating, coating a nano surface treatment agent on the surface of the passivation layer until the surface treatment agent of the nano surface chemically bonds with the surface of the passivation layer to form a film; and (f) curing The film is heated by a heating process to form a resist layer; wherein each step includes a water washing step to keep the surface of the fastener material clean.

A fastener assembly prepared by the method for treating a fastener according to the nano surface treatment agent of the present invention comprises: a fastener, a metal layer, a passivation layer and a resist layer.

Preferably, the metal layer is coated on the fastener, the passivation layer is coated on the metal layer, and the resist layer is coated on the passivation layer.

More preferably, wherein the metal layer is selected from the group consisting of aluminum, magnesium, zinc, Nickel, iron and alloys thereof, the passivation layer is a rough porous metal oxide layer, and the resist layer is formed by chemical bonding of the aforementioned surface treatment agent to the passivation layer.

The nano surface treatment agent of the present invention and the treatment method for covering the surface of the metal material have the following effects:

1. High flash point: The nano surface treatment agent of the invention is an aqueous nano surface treatment agent which is compatible with water, has a flash point of more than 70 ° C, and is a low volatile organic compound (Volatile) Organic Compounds (VOC), no pungent solvent odor, suitable for high environmental standards. In addition, the high flash point feature allows it to be transported as non-hazardous items, both safe and reducing transportation costs.

2. Improve corrosion resistance: In the process of forming the resist layer, the bonding of chemical bonds is used to replace the traditional physical biteing, and the metal alloy surface film with high thinness and strong adhesion is produced, and the surface protection of the metal material is provided.

3. In response to the need of different friction coefficients: the nano surface treatment agent can adjust the friction coefficient of the surface of the metal material by adding wax.

4. Increase the adhesion of the coating: the surface of the metal material treated by the nano surface treatment agent is not easy to fall off after being painted, so the paintability is good; with the diversification of the nano surface treatment agent, the metal The surface of the material can be adjusted to achieve different adhesion, rust, corrosion and water resistance properties by adjusting the composition of the nano surface treatment agent.

5. Applying a nano surface treatment agent to the surface of the metal material can reduce the adhesion of fingerprints and dust.

6. After the formation of the resist layer, there is no need for a water washing process, and the treatment agent used is free of heavy metal ions, which does not pollute the environment. The problem.

7. The method for forming the resist layer can be easily operated by simple immersion plating, spray coating, roller coating, etc., and the equipment cost required for the surface treatment of the metal material having corrosion resistance and wear resistance is greatly reduced, and the production speed is accelerated.

In summary, the present invention is fixed to the surface of the metal material by chemical bonding by the nano surface treatment agent, instead of forming the protective film on the material by physical occlusion, and forming a resist layer by using a nano surface treatment agent. The surface of the material is protected, and the resist layer has a good anti-wear effect due to the internal bismuth or metal oxide; further, the present invention does not require the use of heavy metals, and does not require a water washing step after the formation of the resist layer, Causes environmental pollution and reduces the waste of water resources.

10‧‧‧ screws

11‧‧‧ threaded parts

20‧‧‧metal layer

30‧‧‧ Passivation layer

40‧‧‧resist

1 is a perspective view of a fastener assembly of the present invention.

Figure 2 is a partial cross-sectional view of the fastener assembly of the present invention.

The technical means adopted by the present invention for achieving the intended purpose of the invention will be further described below in conjunction with the drawings and preferred embodiments of the invention.

The invention relates to a method for treating a surface of a metal material, which comprises: pre-treating, removing oil stains and impurities on a surface of a metal material; and activating treatment, immersing the metal material in an acid or an alkaline solution; Activation, removing oxides on the surface of the material and forming a hydroxyl group; Film treatment, coating the nano surface treatment agent on the surface of the passivation layer by immersion plating, spraying or roller coating until the surface treatment agent of the nano surface chemically bonds with the surface of the metal material to form a protective film; wherein the nanometer is formed The surface treatment agent is a nanometer solution formed by mixing at least one alkoxide, water and a basic compound, and catalyzing a condensation reaction between the alkoxide and water, and the nano surface treatment agent further comprises There is a resin; and a curing treatment, and the protective film is heated by a heating means to form a resist layer.

The above resin is selected from the group consisting of an acid alcohol resin, an amino resin, a phenol resin, an acrylic resin, an epoxy resin, a polyurethane resin, a polyester resin, a polyamide resin, a polyurethane resin, an acrylic resin, and a silicone resin. A fluorocarbon resin, a polyurea resin, a polycarbonate resin, a polyacetylene resin, a polyethylene glycol resin, a polyvinylpyrrolidone, a polyolefin resin, a polyvinyl acetate, and combinations thereof.

The above nano surface treatment agent further comprises an auxiliary agent selected from the group consisting of a leveling agent, a dispersing agent, an antifoaming agent, a thickening agent, an anti-cratering agent, a drying accelerator, and a bactericide.

The above alkoxide has the general formula (OR) _x MOM(OR) _x , (R) _y (OR) _xy MOM(OR) _xy (R) _y , (OR) _x M, M(OR) _xy (R) _y or (OR) _x MOM(OR) _x ; wherein R is selected from the group consisting of alkyl, alkenyl, aryl, haloalkyl and hydrogen; wherein M is selected from the group consisting of aluminum , iron, titanium, zirconium, hafnium, tantalum, niobium, tantalum, platinum, indium, tin, gold, antimony, copper and antimony; where x>y, and x is 2, 3, 4 or 5, y is 2, 3 Or 4.

The above basic compound is selected from the group consisting of sodium hydroxide and potassium hydroxide. Ammonia water, sodium carbonate, potassium carbonate, sodium hydrogencarbonate, potassium hydrogencarbonate, primary amines, secondary amines, tertiary amines, sodium ethoxide, and combinations thereof.

The nano surface treatment agent further comprises a wax selected from the group consisting of an aqueous wax, an oil wax and a synthetic wax, and the friction coefficient of the surface of the resist layer formed by the curing process of the protective film is adjusted by changing the amount of the wax added. .

The treatment method of covering the surface of the metal material with the nano surface treatment agent containing all the foregoing conditions is the best implementation method of the present invention.

Further, the nano surface treatment agent of the present invention is a nanometer solution formed by mixing at least one alkoxide, water and a basic compound, and catalyzing a condensation reaction of an alkoxide with water by the basic compound, and The nano surface treatment agent further contains a resin.

The above alkoxide has the general formula (OR) _x MOM(OR) _x , (R) _y (OR) _xy MOM(OR) _xy (R) _y , (OR) _x M, M(OR) _xy (R) _y or (OR) _x MOM(OR) _x ; wherein R is selected from the group consisting of alkyl, alkenyl, aryl, haloalkyl and hydrogen; wherein M is selected from the group consisting of aluminum , iron, titanium, zirconium, hafnium, tantalum, niobium, tantalum, platinum, indium, tin, gold, antimony, copper and antimony; where x>y, and x is 2, 3, 4 or 5, y is 2, 3 Or 4.

The above basic compound is selected from the group consisting of sodium hydroxide, potassium hydroxide, aqueous ammonia, sodium carbonate, potassium carbonate, sodium hydrogencarbonate, potassium hydrogencarbonate, primary amine, secondary amine, tertiary amine, sodium ethoxide, and combinations thereof.

The above resin is selected from the group consisting of an acid alcohol resin, an amino resin, a phenol resin, an acrylic resin, an epoxy resin, a polyurethane, a polyester, a polyamide, a polyurethane resin, an acrylic resin, a silicone resin, and a fluorocarbon. Resins, polyurea resins, polycarbonate resins, polyacetylene resins, polyethylene glycol resins, polyvinylpyrrolidone, polyolefin resins, polyvinyl acetate, and combinations thereof.

The above nano surface treatment agent further comprises an auxiliary agent selected from the group consisting of a leveling agent, a dispersing agent, an antifoaming agent, a thickening agent, an anti-cratering agent, a drying accelerator, and a bactericide.

The above nano surface treatment agent further comprises a wax selected from the group consisting of an aqueous wax, an oil wax, and a synthetic wax.

A nano surface treatment agent comprising all of the foregoing conditions is the preferred embodiment of the present invention.

The following are representative examples of the nano surface treatment agent of the present invention:

Example 1

First, 10 g of ethyl silicate condense was added, 14.4 g of isopropanol was added and stirred for 10 minutes, and then 4 g of aluminum triisopropoxide was added and stirred for 10 minutes, after which trimethoxy group was added. 10 gram of Trimethoxyvinylsilane was mixed and stirred for 10 minutes, and then 9.7 g of Ethylene glycol monobutylether (BCS) and 0.1 g of sodium hydroxide were added and mixed for 10 minutes. Then, 15 g of water was added, and the mixture was stirred for 2 hours. The solution was further condensed, and 1.6 g of Ethylacetoacetate (EAcAc) was added thereto, and the mixture was stirred for 1 hour to obtain a nanometer solution.

10 g of the nano solution was taken, and 7 g of polyvinyl acetate, 1 g of antifoaming agent, 1 g of surfactant, and 81 g of water were added, and the mixture was stirred for 2 hours to obtain a nano surface treating agent. This nano surface treatment agent was experimentally tested and the flash point was greater than 93 °C.

Example 2

First, take 10 grams of citrate concentrate and add isopropanol 14.4. Stir for 10 minutes, add 4 g of aluminum triisopropoxide and mix and stir for 10 minutes, then add 10 g of trimethoxyvinyl hydrazine and mix and stir for 10 minutes, add 9.7 g of ethylene glycol butyl ether and 0.1 g of sodium hydroxide. After stirring for 10 minutes, 15 g of water was added, and the mixture was stirred for 2 hours to further carry out a condensation reaction, and 1.6 g of ethyl acetate was added thereto, and the mixture was stirred for 1 hour to obtain a nanometer solution.

10 g of the nano solution was taken, and then 17 g of polyvinyl acetate, 1 g of defoaming agent, 1 g of surfactant, and 71 g of water were added, and the mixture was stirred for 2 hours to obtain a nano surface treating agent. This nano surface treatment agent was experimentally tested and the flash point was greater than 70 °C.

Example 3

First, 10 g of citrate concentrate was added, 14.4 g of isopropanol was added and stirred for 10 minutes, and then 4 g of triisopropoxy aluminum was added and mixed for 10 minutes, and then 10 g of trimethoxyvinyl hydrazine was added and mixed for 10 minutes. After adding 9.7 g of ethylene glycol butyl ether and 0.1 g of sodium hydroxide, the mixture was stirred for 10 minutes, 15 g of water was added, and the mixture was stirred for 2 hours to further condense the solution, and 1.6 g of ethyl acetate was added thereto, and the mixture was stirred for 1 hour. A nanometer solution is available.

10 g of the nano-solution was taken, and 10 g of polyvinyl acetate, 1 g of antifoaming agent, 1 g of surfactant, and 78 g of water were added, and the mixture was stirred for 2 hours to obtain a surface treatment agent for nano. This nano surface treatment agent was experimentally tested and the flash point was greater than 85 °C.

Example 4

First, take 10 grams of citrate concentrate, add 14.4 grams of isopropanol and stir for 10 minutes, then add 4 grams of triisopropoxy aluminum and mix and stir for 10 minutes. After the clock, 10 g of trimethoxyvinyl hydrazine was added and stirred for 10 minutes. After adding 9.7 g of ethylene glycol butyl ether and 0.1 g of sodium hydroxide, the mixture was stirred for 10 minutes. Then, 15 g of water was added, and the mixture was stirred for 2 hours to further the solution. The mixture was condensed, and 1.6 g of ethyl acetate was added thereto, and the mixture was stirred for 1 hour to obtain a nanometer solution.

Take 10 grams of the nano-solution, then add 5 grams of polyvinyl acetate, 2 grams of water wax, 1 gram of antifoaming agent, 1 gram of surfactant, 81 grams of water, and mix and stir for 2 hours to obtain a surface treatment of one nanometer. Agent. This nano surface treatment agent was experimentally tested and the coefficient of friction was 0.14-0.17.

Example 5

First, 10 g of citrate concentrate was added, 14.4 g of isopropanol was added and stirred for 10 minutes, and then 4 g of triisopropoxy aluminum was added and mixed for 10 minutes, and then 10 g of trimethoxyvinyl hydrazine was added and mixed for 10 minutes. After adding 9.7 g of ethylene glycol butyl ether and 0.1 g of sodium hydroxide, the mixture was stirred for 10 minutes, 15 g of water was added, and the mixture was stirred for 2 hours to further condense the solution, and 1.6 g of ethyl acetate was added thereto, and the mixture was stirred for 1 hour. A nanometer solution is available.

Take 10 grams of the nano-solution, add 5 grams of polyvinyl acetate, 5 grams of water wax, 1 gram of antifoaming agent, 1 gram of surfactant, 78 grams of water, mix and stir for 2 hours, and obtain a surface treatment of one nanometer. Agent. This nano surface treatment agent was experimentally tested and the coefficient of friction was 0.12-0.13.

Example 6

First, 10 g of citrate concentrate was added, 14.4 g of isopropanol was added and stirred for 10 minutes, and then 4 g of triisopropoxy aluminum was added and mixed for 10 minutes, and then 10 g of trimethoxyvinyl hydrazine was added and mixed for 10 minutes. , After adding 9.7 g of ethylene glycol butyl ether and 0.1 g of sodium hydroxide, the mixture was stirred for 10 minutes, 15 g of water was added, and the mixture was stirred for 2 hours to further condense the solution, and 1.6 g of ethyl acetate was added thereto, and the mixture was stirred for 1 hour. Get a nanometer solution.

Take 10 grams of the nano-solution, then add 5 grams of polyvinyl acetate, 9 grams of water wax, 1 gram of antifoaming agent, 1 gram of surfactant, 70 grams of water, mix and stir for 2 hours, and obtain a surface treatment of one nanometer. Agent. This nano surface treatment agent was experimentally tested and the coefficient of friction was between 0.09 and 0.1.

The following is a comparative example of various examples of the surface treatment agent of the present invention:

Comparative example 1

First, 10 g of citrate concentrate was added, 14.4 g of isopropanol was added and stirred for 10 minutes, and then 4 g of second aluminum butoxide (C ₁₂ H ₂₇ O ₃ Al) was added and stirred for 10 minutes, after which trimethoxy group was added. 10 g of vinyl hydrazine (C ₅ H ₁₂ O ₃ Si) was stirred and stirred for 10 minutes, and then 9.7 g of ethylene glycol butyl ether and 0.1 g of nitric acid were added and stirred for 10 minutes. Then, 15 g of water was added, and the mixture was stirred for 2 hours to further the solution. The mixture was condensed, and 1.6 g of ethyl acetate was added thereto, and the mixture was stirred for 1 hour to obtain a nanometer solution.

10 g of the nano-solution was taken, and then 5 g of polyvinyl acetate, 1 g of antifoaming agent, 1 g of surfactant, 83 g of isopropyl alcohol were added, and the mixture was stirred for 2 hours to obtain a nano surface treatment agent. This nano surface treatment agent has a flash point of 16.7 °C.

Comparative example 2

First, take 10 grams of citrate concentrate, add 14.4 grams of isopropanol and stir for 10 minutes, then add 4 grams of second butoxide aluminum and mix and stir for 10 minutes. Then, 10 g of trimethoxyvinyl hydrazine was added and stirred for 10 minutes, and then 9.7 g of ethylene glycol butyl ether and 0.1 g of nitric acid were added and mixed for 10 minutes. Then, 15 g of water was added, and the mixture was stirred for 2 hours to further condense the solution. And 1.6 g of ethyl acetate was added, and the mixture was stirred for 1 hour to obtain a nanometer solution.

20 g of the nano-solution was taken, and 10 g of polyvinyl acetate, 2 g of antifoaming agent, 1 g of surfactant, 67 g of isopropyl alcohol, and mixing and stirring for 2 hours were obtained, and a nano surface treatment agent was obtained. This nano surface treatment agent has a flash point of 20 °C.

Comparative example 3

First, 10 g of citrate concentrate was added, 14.4 g of isopropanol was added and stirred for 10 minutes, and then 4 g of second butoxide aluminum was added and stirred for 10 minutes, and then 10 g of trimethoxyvinyl hydrazine was added and mixed for 10 minutes. After adding 9.7 g of ethylene glycol butyl ether and 0.1 g of nitric acid and stirring for 10 minutes, 15 g of water was added, and the mixture was stirred for 2 hours to further condense the solution, and 1.6 g of ethyl acetate was added thereto, and the mixture was stirred for 1 hour. One nanometer solution.

30 g of the nano-solution was taken, and then 6 g of polyvinyl acetate, 3 g of antifoaming agent, 2 g of surfactant, 59 g of isopropyl alcohol, and mixing and stirring for 2 hours were used to obtain a surface treatment agent for nano. This nano surface treatment agent has a flash point of 35.2 °C.

The above Comparative Examples 1 to 3 all have a strong and pungent solvent odor, contain high volatile organic compounds, are highly harmful to the environment, and need to be transported as dangerous articles, increasing risks and costs during transportation.

From the above preferred examples 1-6 of the present invention and the comparative comparative examples 1-3, it was confirmed that the nano surface treatment agent of the present invention used the basic compound-sodium hydroxide instead of the acid compound-nitric acid to surface-treat the nano surface. Agent has High flash point (above 70 °C), no pungent nasal solvent smell, suitable for environment with high environmental standards, and can be transported in non-dangerous goods.

Further, it can be confirmed by the preferred embodiments 4-6 of the present invention that as the wax addition amount in the surface treatment agent is increased, the friction coefficient thereof is also lowered, so that the wax addition can be adjusted by adjusting the surface treatment agent of the nano surface. The content is to adjust the friction coefficient of the film formed by the nano surface treatment agent.

Further, the method for treating a fastener by using the nano surface treating agent of the present invention comprises the following steps: (a) degreasing, which treats a fastener material through a degreasing agent to remove surface oil; (b) etching treatment The surface of the fastener material is acid-etched with an acidic solution, and the surface of the fastener material is exposed to metallic primary color or gray or black, and the surface of the fastener material is activated; (c) electroplating treatment, Forming a light metal layer on the surface of the fastener material by electroplating; (d) passivating treatment, the surface of the fastener material having the light metal layer is coated with a passivation plating solution until the passivation plating solution is on the light metal layer Forming a passivation layer on the surface; (e) film treating, coating a nano surface treatment agent on the surface of the passivation layer until the nano surface treatment agent chemically bonds with the surface of the passivation layer to form a film; The aging treatment heats the film by a heating process to form a resist layer.

Wherein the nano surface treatment agent is the aforementioned nano surface treatment agent, and each step comprises a water washing step to maintain the fastener element The surface of the material is clean.

The fastener assembly prepared by the method for treating a fastener according to the nano surface treatment agent of the present invention, wherein the fastener component is a screw assembly, as shown in FIG. 1 and FIG. 2, comprising: a screw 10. A metal layer 20, a passivation layer 30, and a resist layer 40.

The screw 10 includes a body of a screw 10 and at least one threaded portion 11 , wherein the threaded portion 11 is screwed on an outer circumference of the body of the screw 10 .

The metal layer 20 is coated on the screw 10 and is selected from the group consisting of aluminum, magnesium, zinc, nickel, iron and alloys thereof.

The passivation layer 30 is coated on the metal layer 20, which is a rough porous metal oxide layer.

The foregoing resist layer 40 is formed by chemically bonding the aforementioned surface treatment agent to the passivation layer 30.

The screw assembly prepared by the above method for treating the fastener with the nano surface treatment agent of the present invention is subjected to the ASTM B117 salt spray test, which is sprayed with an aqueous solution of sodium chloride on the surface of the screw assembly, and placed for 24 hours to observe the screw. The oxidation of the surface of the component, wherein the portion to be oxidized is less than 5%, shows that the quality of the treated screw assembly is stable.

The screw assembly prepared by the above-described treatment method of covering the fastener with the nano surface treatment agent of the present invention has a rust prevention time of 500 to 2000 hours by the ASTM B117 salt spray test, and thus has high corrosion resistance.

In order to meet the requirements of different friction coefficients: the nano surface treatment agent can adjust the friction coefficient of the screw assembly by adding wax.

The nano surface treatment agent of the present invention and the treatment method for covering the surface of the metal material have the following effects:

1. High flash point: The nano surface treatment agent of the invention is an aqueous nano surface treatment agent which is compatible with water, the flash point can be greater than 70 ° C, low volatile organic compound, no pungent solvent Odour, suitable for environments with high standards. In addition, the high flash point feature allows it to be transported as non-hazardous items, both safe and reducing transportation costs.

2. Improve corrosion resistance: In the process of forming the resist layer, the physical bond is replaced by the bonding of chemical bonds, which can produce a metal film surface film with high thinness and strong adhesion, and provide surface protection of the metal material. The previously prepared screw assembly was found to pass the ASTM B117 salt spray test, and its rust prevention time can reach 500 to 2000 hours, thereby demonstrating that the corrosion resistance can be effectively improved.

3. In response to the need of different friction coefficients: the nano surface treatment agent can adjust the friction coefficient of the surface of the metal material by adding wax.

4. Increasing the adhesion of the coating: The 100-gram test on the surface of the metal material treated with the nano surface treatment agent proves that the paint on the surface layer does not fall off, indicating that the resist layer has good paintability. With the diversification of nano surface treatment agents, the surface of the metal material can be adjusted to achieve different adhesion, rust prevention, corrosion resistance and water resistance by adjusting the composition of the nano surface treatment agent.

5. Applying a nano surface treatment agent to the surface of the metal material can reduce the adhesion of fingerprints and dust.

6. After the formation of the resist layer, no water washing process is required, and the treatment agent used does not have heavy metal ions, and there is no pollution water source to the environment. The problem.

7. The method for forming the resist layer can be simple and easy to operate by simple immersion plating, spraying, roller coating, etc., so that the equipment cost required for surface treatment of the metal material having corrosion resistance and wear resistance is greatly reduced, and the production speed is accelerated.

In summary, the present invention is fixed to the surface of the metal material by chemical bonding by a nano surface treatment agent, instead of forming a protective film on the material by physical adsorption, and forming a resist layer by using a nano surface treatment agent. The surface of the material is protected, and the resist has a good anti-wear effect due to the internal bismuth or metal oxide; further, the present invention does not require the use of heavy metals, and does not require a water washing step after the resist layer is formed, and thus does not It will cause environmental pollution and reduce the waste of water resources.

10‧‧‧ screws

20‧‧‧metal layer

30‧‧‧ Passivation layer

40‧‧‧resist

Claims (20)

A method for treating a surface of a metal material by covering a surface of a metal material, comprising: pre-treating, removing oil stains and impurities on a surface of a metal material; activating treatment, immersing the metal material in an acid or an alkaline solution for activation, Removing oxides on the surface of the material and forming a hydroxyl group; film processing, coating the surface treatment agent on the surface of the metal material until the surface treatment agent of the nano surface chemically bonds with the surface of the metal material to form a protective film; The nano surface treatment agent is a nanometer solution formed by mixing at least one alkoxide, water and a basic compound, and catalyzing a condensation reaction of an alkoxide with water by the basic compound, and the surface treatment agent is further The resin is included; and the curing treatment is performed by heating the protective film by a heating means to form a resist layer. The method for treating a surface of a metal material according to claim 1, wherein the resin is selected from the group consisting of an acid alcohol resin, an amino resin, a phenol resin, a polyacryl resin, an epoxy resin, a polyurethane resin, and a polyester. Resin, polyamide resin, polyurethane resin, acrylic resin, epoxy resin, fluorocarbon resin, polyurea resin, polycarbonate resin, polyacetylene resin, polyethylene glycol resin, poly Vinyl pyrrolidone, polyolefin resin, polyvinyl acetate, and combinations thereof. The method for treating a surface of a metal material according to claim 1 or 2, wherein the nano surface treatment agent further comprises an auxiliary agent selected from the group consisting of a leveling agent, a dispersing agent, and a defoaming agent. Agent, thickener, anti-cratering agent, drying accelerator and bactericide. The method for treating a surface of a metal material according to claim 1 or 2, wherein the alkoxide has the formula (OR) _x MOM(OR) _x , (R) _y (OR) _xy MOM(OR) _xy (R) _y , (OR) _x M, M(OR) _xy (R) _y or (OR) _x MOM(OR) _x ; wherein R is selected from alkyl, alkenyl, aryl, Haloalkyl and hydrogen; wherein M is selected from the group consisting of aluminum, iron, titanium, zirconium, hafnium, tantalum, niobium, tantalum, platinum, indium, tin, gold, lanthanum, copper and cerium; wherein x>y and x is 2 , 3, 4 or 5, y is 2, 3 or 4. The method for treating a surface of a metal material according to claim 3, wherein the alkoxide has the general formula (OR) _x MOM(OR) _x , (R) _y (OR) _xy MOM ( OR) _xy (R) _y , (OR) _x M, M(OR) _xy (R) _y or (OR) _x MOM(OR) _x ; wherein R is selected from alkyl, alkenyl, aryl, halo And hydrogen; wherein M is selected from the group consisting of aluminum, iron, titanium, zirconium, hafnium, tantalum, niobium, tantalum, platinum, indium, tin, gold, antimony, copper and antimony; wherein x>y, and x is 2,3 , 4 or 5, y is 2, 3 or 4. The method for treating a surface of a metal material according to claim 1 or 2, wherein the basic compound is selected from the group consisting of sodium hydroxide, potassium hydroxide, aqueous ammonia, sodium carbonate, potassium carbonate, and sodium hydrogencarbonate. , potassium bicarbonate, primary amine, secondary amine, tertiary amine, sodium ethoxide and combinations thereof. The method for treating a surface of a metal material according to claim 3, wherein the basic compound is selected from the group consisting of sodium hydroxide, potassium hydroxide, aqueous ammonia, sodium carbonate, potassium carbonate, sodium hydrogencarbonate, and carbonic acid. Potassium hydrogen, primary amines, secondary amines, tertiary amines, sodium ethoxide, and combinations thereof. The surface treatment agent according to claim 1 or 2 is covered with a metal material The surface treatment method of the material, wherein the nano surface treatment agent further comprises a wax selected from the group consisting of an aqueous wax, an oil wax and a synthetic wax, and the protective film is formed by curing after changing the amount of the wax added. The coefficient of friction of the surface of the resist. The method for treating a surface of a metal material according to claim 3, wherein the nano surface treatment agent further comprises a wax selected from the group consisting of an aqueous wax, an oil wax, and a synthetic wax. The amount of addition of the wax is changed to adjust the friction coefficient of the surface of the resist layer formed by the aging treatment of the protective film. The method for treating a surface of a metal material according to claim 1 or 2, wherein the nano surface treatment agent is coated on the surface of the metal material by immersion plating, spray coating or roller coating. The method for treating a surface of a metal material according to claim 3, wherein the nano surface treatment agent is coated on the surface of the metal material by immersion plating, spray coating or roller coating. A nano surface treatment agent which is prepared by mixing at least one alkoxide, water and a basic compound, and catalyzing a condensation reaction of an alkoxide with water by the basic compound, and the nanometer The surface treatment agent further contains a resin. The nano surface treatment agent according to claim 12, wherein the alkoxide has the formula (OR) _x MOM(OR) _x , (R) _y (OR) _xy MOM(OR) _xy (R) _y , (OR) _x M, M(OR) _xy (R) _y or (OR) _x MOM(OR) _x ; wherein R is selected from the group consisting of alkyl, alkenyl, aryl, haloalkyl and hydrogen; From aluminum, iron, titanium, zirconium, hafnium, tantalum, niobium, tantalum, platinum, indium, tin, gold, antimony, copper and antimony; where x>y, and x is 2, 3, 4 or 5, y is 2 , 3 or 4. The nano surface treatment agent according to claim 12, wherein the basic compound is selected from the group consisting of sodium hydroxide, potassium hydroxide, aqueous ammonia, sodium carbonate, potassium carbonate, sodium hydrogencarbonate, potassium hydrogencarbonate, primary amine, Secondary amines, tertiary amines, sodium ethoxide, and combinations thereof. The nano surface treatment agent according to claim 12, wherein the resin is selected from the group consisting of an acid alcohol resin, an amino resin, a phenol resin, an acrylic resin, an epoxy resin, a polyurethane, a polyester, a polyamide, a polyamine group. Ethyl formate resin, acrylic resin, enamel resin, fluorocarbon resin, polyurea resin, polycarbonate resin, polyacetylene resin, polyethylene glycol resin, polyvinylpyrrolidone, polyolefin resin, polyvinyl acetate Esters and combinations thereof. The nano surface treatment agent according to claim 12, wherein the nano surface treatment agent further comprises an auxiliary agent selected from the group consisting of a leveling agent, a dispersing agent, an antifoaming agent, a thickening agent, and an anti-cratering hole. Agent, drying accelerator and bactericide. The nano surface treatment agent according to claim 12, wherein the nano surface treatment agent further comprises a wax selected from the group consisting of an aqueous wax, an oil wax, and a synthetic wax. A method for treating a fastener covering a fastener, comprising the steps of: (a) degreasing, wherein a fastener material is treated by a degreasing agent to remove surface oil; (b) etching treatment is performed by An acid solution is subjected to acid etching treatment on the surface of the fastener material, and the surface of the fastener material is exposed to metallic primary color or gray or black. Color, and promote the surface activation of the fastener material; (c) electroplating treatment, which forms a light metal layer on the surface of the fastener material by electroplating; (d) passivation treatment, which is performed on the light metal layer The surface of the fastener material is coated with a passivation plating solution until the passivation plating solution forms a passivation layer on the surface of the light metal layer; (e) the film is treated, and a surface treatment agent is coated on the surface of the passivation layer until the a surface treatment agent chemically bonds with the surface of the passivation layer to form a film; and (f) a curing process, the film is heated by a heating process to form a resist layer; wherein the nano surface treatment agent is at least one The alkoxide, the water and the basic compound are mixed, and the basic compound catalyzes a nano-solution formed by a condensation reaction of the alkoxide with water, and the nano surface treatment agent further comprises a resin, an auxiliary agent and a wax. A fastener assembly prepared by the method for covering a fastener according to the item 18 of claim 18, comprising: a fastener; a metal layer coated on the fastener; a passivation a layer overlying the metal layer; and a resist layer overlying the passivation layer; wherein the resist layer is mixed with at least one alkoxide, water, and a basic compound, and catalyzed by the basic compound A nano-solution formed by a condensation reaction of an alkoxide with water; wherein the nano surface treatment agent further comprises a resin, an auxiliary agent and a wax, and is chemically bonded to the passivation layer. The fastener component of claim 19, wherein the metal is selected from the group consisting of aluminum, magnesium, zinc, nickel, iron, and alloys thereof, and the passivation layer is a rough porous metal oxide layer.