CN113617610A - Method for preparing metal luster faucet by coating brass or zinc alloy substrate - Google Patents

Method for preparing metal luster faucet by coating brass or zinc alloy substrate Download PDF

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Publication number
CN113617610A
CN113617610A CN202111035324.5A CN202111035324A CN113617610A CN 113617610 A CN113617610 A CN 113617610A CN 202111035324 A CN202111035324 A CN 202111035324A CN 113617610 A CN113617610 A CN 113617610A
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CN
China
Prior art keywords
coating
faucet
brass
base material
zinc alloy
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Granted
Application number
CN202111035324.5A
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Chinese (zh)
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CN113617610B (en
Inventor
钟保民
王晓娇
张志文
曹伯兴
李智鸿
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Foshan Dongpeng Ceramic Co Ltd
Foshan Dongpeng Ceramic Development Co Ltd
Guangdong Dongpeng Holdings Co Ltd
Original Assignee
Foshan Dongpeng Ceramic Co Ltd
Foshan Dongpeng Ceramic Development Co Ltd
Guangdong Dongpeng Holdings Co Ltd
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Priority to CN202111035324.5A priority Critical patent/CN113617610B/en
Publication of CN113617610A publication Critical patent/CN113617610A/en
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Publication of CN113617610B publication Critical patent/CN113617610B/en
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    • 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
    • B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
    • B05D5/067—Metallic effect
    • B05D5/068—Metallic effect achieved by multilayers
    • 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
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
    • B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
    • 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
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/002—Pretreatement
    • 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
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0218—Pretreatment, e.g. heating the substrate
    • 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
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254—After-treatment
    • 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
    • B05D7/14—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 to metal, e.g. car bodies
    • 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
    • B05D7/14—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 to metal, e.g. car bodies
    • B05D7/16—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 to metal, e.g. car bodies using synthetic lacquers or varnishes
    • 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
    • B05D7/50—Multilayers
    • B05D7/56—Three layers or more
    • B05D7/58—No clear coat specified
    • B05D7/584—No clear coat specified at least some layers being let to dry, at least partially, before applying the next layer
    • 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
    • B05D7/50—Multilayers
    • B05D7/56—Three layers or more
    • B05D7/58—No clear coat specified
    • B05D7/586—No clear coat specified each layer being cured, at least partially, separately
    • 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
    • C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • 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
    • C09D5/002—Priming paints
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/0015—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterized by the colour of the layer
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/0021—Reactive sputtering or evaporation
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
    • C23C14/0635—Carbides
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
    • C23C14/0641—Nitrides
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
    • C23C14/08—Oxides
    • C23C14/083—Oxides of refractory metals or yttrium
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
    • C23C14/14—Metallic material, boron or silicon
    • C23C14/16—Metallic material, boron or silicon on metallic substrates or on substrates of boron or silicon
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
    • C23C14/24—Vacuum evaporation
    • C23C14/32—Vacuum evaporation by explosion; by evaporation and subsequent ionisation of the vapours, e.g. ion-plating
    • C23C14/325—Electric arc evaporation
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
    • C23C14/34—Sputtering
    • C23C14/35—Sputtering by application of a magnetic field, e.g. magnetron sputtering
    • 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
    • B05D2202/30—Metallic substrate based on refractory metals (Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W)
    • 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
    • B05D2202/40—Metallic substrate based on other transition elements
    • B05D2202/45—Metallic substrate based on other transition elements based on Cu

Abstract

The invention relates to the technical field of bathroom decoration, in particular to a method for preparing a metallic luster faucet by coating a brass or zinc alloy substrate, which comprises the following steps: pretreating and preheating the surface of a base material; spraying an organic silicon primer on the surface of the base material, and curing; placing the substrate treated in the step into a multi-arc ion coating box for vacuum coating in a mode of multi-arc ion coating plus bias voltage plus magnetron sputtering coating; spraying a PP treating agent on the surface of the base material after the coating, and curing; and spraying polyacrylate baking paint on the surface of the base material cured in the step, and curing to obtain the faucet with metallic luster. According to the invention, the surface of the base material is sprayed with a layer of organic silicon primer, and after vacuum coating, a layer of PP treating agent is sprayed firstly, and then the polyacrylate baking paint is sprayed, so that the binding force among all coatings is greatly enhanced, the metallic luster is enhanced, and the problems of low binding force and non-persistent metallic luster existing in the existing coating of brass or zinc alloy base materials can be solved.

Description

Method for preparing metal luster faucet by coating brass or zinc alloy substrate
Technical Field
The invention relates to the technical field of bathroom decoration, in particular to a method for preparing a metallic luster faucet by coating a brass or zinc alloy substrate.
Background
Along with the development of society, people are higher and higher to bathroom hardware's outward appearance technology, and present tap all can electroplate a layer decorative layer on its surface, and the process of water electroplating technology is: the water faucet has the advantages that the water electroplating process usually needs a plurality of oil removal and acid pickling processes and needs to be continuously replaced by various different electrolytes, so that cations to be plated with metal in the electroplating solution can be effectively deposited on the surface of a base metal through the action of electrolysis to form a plating layer with a stable structure, so that the problems of serious environmental pollution such as water pollution and the like and huge environmental protection pressure exist. Therefore, some manufacturers begin to use a vacuum coating process to coat bathroom hardware such as water taps, the vacuum coating includes vacuum evaporation, multi-arc ion coating and magnetron sputtering coating, and the vacuum evaporation has large limitations due to poor adhesion of the coating and poor coating uniformity of the special-shaped piece; while the multi-arc ion plating and the magnetron sputtering plating are popular because of strong adhesion and good surface effect of the plating, in the current application, when the multi-arc ion plating process is adopted to plate the surface of the faucet made of brass and zinc alloy, the problems of poor adhesion and no metal brightness of a surface plating layer exist, although the primer and the plating layer are sprayed on the surface of the base material in the prior art when the multi-arc ion plating is carried out, the problem of low binding force still exists in the primer and the plating layer, the plating layer is easy to fall off, so that the metal luster is not durable, and in order to improve the performances of wear resistance, bacteria resistance and the like of the surface of the faucet, a layer of finish paint is often sprayed on the surface of the plating layer, but the finish paint layer in the prior art can shield the metal luster of the plating layer to a certain degree, so that the metal luster on the surface of the faucet is weak, and the problems of low binding force also exist in the plating layer and the finish paint layer in the prior art, the adhesive force of the coating layer and the surface paint layer is difficult to reach 0 grade, so that each coating is easy to fall off, the metallic luster is not lasting, and the service life of the brass or zinc alloy faucet is influenced.
Disclosure of Invention
Aiming at the problems brought forward by the background technology, the invention aims to provide a method for preparing a metal luster faucet by coating a brass or zinc alloy substrate, which is characterized in that an organic silicon primer layer is sprayed on the surface of the substrate, a pp treatment agent layer is sprayed after vacuum coating, and then polyacrylate baking varnish is sprayed, so that the bonding force among all coatings is greatly enhanced, the metal luster is enhanced, and the problems of low bonding force and non-persistent metal luster existing in the existing process of coating the brass or zinc alloy substrate can be solved.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for preparing a metal luster faucet by coating a brass or zinc alloy substrate comprises the following steps:
(1) pretreating the surface of a base material, and preheating the pretreated base material, wherein the base material is brass or zinc alloy;
(2) spraying an organic silicon primer on the surface of the base material, and curing, wherein the organic silicon primer is a hydroxyl acrylic organic silicon coating;
(3) placing the substrate treated in the step (2) in a coating box for vacuum coating in a mode of multi-arc ion coating plus bias voltage plus magnetron sputtering coating;
(4) spraying a PP treating agent on the surface of the base material after the coating, and curing;
(5) and (5) spraying polyacrylate baking varnish on the surface of the base material cured in the step (4), and curing to obtain the faucet with metallic luster.
Further, in the step (2), the raw materials of the silicone primer comprise, by weight, 33.44-51.37 parts of acrylic resin (hydroxyl type), 16.49-27.45 parts of silicone oligomer, 15.79-23.75 parts of ethylene glycol ethyl ether acetate, 1.97-2.11 parts of n-butanol, and 0.2 part of dispersant BYK 333; (ii) a
The organic silicon oligomer contains 13.8 to 15.8 mass percent of methoxyl.
Further, in the step (3), the specific coating method of the multi-arc ion coating, the bias voltage and the magnetron sputtering coating is as follows: carrying out magnetron sputtering on a substrate, setting direct-current bias parameters to add bias voltage, and carrying out multi-arc ion coating;
parameters of the dc bias: bias voltage 80-90V, duty cycle: 50-65%; the power for multi-arc ion plating is 70-80V.
Further, in the step (4), the PP treatment agent is a chlorinated polypropylene polymer or a chlorinated modified acrylic resin, wherein the PP treatment agent comprises one or more of PP treatment agents with the model number of FTP-2, PP901 or PPXX.
Further, in the step (2), the specific operation of curing the silicone primer is as follows: after the surface of the base material is sprayed with the organic silicon primer, the organic silicon primer is self-leveling and dried for 25-35 min, heated to 78-82 ℃, kept for 1.5-2.5h, and then heated to 145-155 ℃ and kept for 40 min.
Further, in the step (4), the specific operation of curing the PP treatment agent is as follows: drying PP treating agent by air for 15-25min or drying at 65-75 deg.C for 3-7 min.
Further, in the step (5), the concrete operation of curing the polyacrylate baking varnish is as follows: after spraying polyacrylate baking varnish, enabling the polyacrylate baking varnish to self-level and dry for 25-35 min, heating to 78-82 ℃, preserving heat for 1.5-2.5h, and then raising the temperature to 145-155 ℃ and preserving heat for 35-45 min.
Further, in the step (2), the thickness of the sprayed silicone primer is 20-25 μm;
in the step (4), the thickness of the PP treating agent sprayed is less than or equal to 5 mu m.
Further, in the step (5), the thickness of the spraying of the polyacrylate baking varnish is 20-25 μm.
Further, in the step (3), in the vacuum coating process, one or more of argon, acetylene, nitrogen and oxygen are introduced into the multi-arc ion coating box;
the target material adopted by the vacuum coating comprises one or two of chromium or titanium.
Further, in the step (1), the pretreatment of the surface of the substrate specifically comprises: removing dust on the surface of the base material, performing ultrasonic cleaning to remove oil, and drying;
in the step (1), the preheating temperature of the base material is 30-60 ℃.
The beneficial effects of this technical scheme do: by spraying a layer of organic silicon primer on the surface of the base material, spraying a layer of pp treatment agent after vacuum coating and then spraying polyacrylate baking paint, the bonding force among the coatings is greatly enhanced, the metallic luster is enhanced, and the problems of low bonding force, low adhesive force, weak metallic luster and non-lasting metallic luster existing in the existing coating of brass or zinc alloy base materials can be solved.
Detailed Description
The following detailed description further illustrates the technical solutions of the present invention.
A method for preparing a faucet with metallic luster by coating a brass or zinc alloy substrate is characterized by comprising the following steps:
(1) pretreating the surface of a base material, and preheating the pretreated base material, wherein the base material is brass or zinc alloy;
(2) spraying an organic silicon primer on the surface of the base material, and curing, wherein the organic silicon primer is a hydroxyl acrylic organic silicon coating;
(3) placing the substrate treated in the step (2) in a coating box for vacuum coating in a mode of multi-arc ion coating plus bias voltage plus magnetron sputtering coating;
(4) spraying a PP treating agent on the surface of the base material after the coating, and curing;
(5) and (4) coating polyacrylate baking paint on the surface of the base material cured in the step (4), and curing to obtain the metal luster faucet.
It is worth mentioning that, in the production of the water faucet, more and more manufacturers begin to plate the surface of the water faucet in a vacuum coating mode, and for the water faucet with the base material of brass or zinc alloy, the product with metallic luster is prepared by adopting the vacuum coating mode, the problems of poor adhesion and weak metallic luster of the vacuum coating on the primer are generally existed, the problem of poor adhesion between the finish paint layer and the vacuum coating is also existed, the adhesion of the prepared water faucet is generally grade 1, and is difficult to reach grade 0, so that each coating is easy to fall off, and the service life of the water faucet with the brass or zinc alloy is influenced. According to the technical scheme, the hydroxyl acrylic organosilicon paint is sprayed on the surface of the base material to obtain a primer layer, then the surface of the primer layer is subjected to vacuum coating in a vacuum coating mode of multi-arc ion coating, bias voltage and magnetron sputtering coating to obtain a vacuum coating layer, then the surface of the vacuum coating layer is sprayed with the PP treating agent, and finally the surface of the PP treating agent is sprayed with the polyacrylate baking paint, so that the adhesive force among all layers of the brass or zinc alloy faucet can be remarkably improved, the adhesive force can reach 0 level, the prepared brass or zinc alloy faucet has high metal luster, the surface is corrosion-resistant and good in durability, the appearance of the product is more attractive, and the problems of low adhesive force and weak metal luster caused by the fact that the existing vacuum coating is adopted for coating the brass or zinc alloy faucet are solved.
Specifically, the method adopts a multi-arc ion plating and bias voltage and magnetron sputtering plating mode to plate a brass or zinc alloy base material, so that the adhesion of a vacuum plating layer can be improved, the prepared faucet has high metal luster, the adhesion of the prepared brass or zinc alloy faucet can reach 0 level, if the multi-arc ion plating is singly used, although the gloss plumpness of the vacuum plating layer is high, the adhesion of the vacuum plating layer is poor, if the magnetron sputtering plating is singly used, the adhesion of the vacuum plating layer reaches the standard, the metal luster of the vacuum plating layer is low, the high metal luster cannot be presented, and the adhesion of the water-based finish paint sprayed on the vacuum plating layer which is obtained by adopting the multi-arc ion plating or magnetron sputtering plating mode is generally not high, generally I level and cannot reach 0 level.
It should also be pointed out that if the multi-arc ion plating and bias voltage and magnetron sputtering plating mode is directly applied to directly carry out vacuum plating on the substrate made of brass and zinc alloy, the problems of poor plating adhesion and insufficient metal gloss exist, because the plating is carried out on the surface of the brass and zinc alloy, ions are difficult to generate alloying reaction, and the adhesion and the gloss are poor, therefore, the technical proposal carries out pretreatment on the surface of the substrate before vacuum plating, and then carries out preheating, and then sprays hydroxyl acrylic acid organic silicon coating on the surface of the substrate made of brass and zinc alloy, because the vacuum plating layer can not be plated on the surface of the brass and zinc alloy, a primer is needed to be carried out for transition, thus not only the bonding force between the vacuum plating layer and the surface of the substrate can be increased, and the corrosion of the substrate can be prevented, but also after the vacuum plating is carried out on the surface of the substrate made of the brass and zinc alloy, the surface of the coating has high metal luster, the hydroxyl acrylic organosilicon coating forms a hard and corrosion-resistant protective film on the surface of the base material after being cured, so that a hydroelectric coating in the traditional process is replaced, the protective film formed after the hydroxyl acrylic organosilicon coating is cured can be used as a transition layer, metal ions of the coating can be easily attached to the surface of the protective film, and the vacuum coating of the surface of the hydroxyl acrylic organosilicon coating not only ensures that the coating has strong adhesive force, but also has good metal luster, so that the surface of the brass or zinc alloy base material can obtain a protective layer with various colors and metal luster. The durability, gloss retention and adhesive force of the total hydroxyl acrylic organic silicon coating are superior to those of epoxy organic silicon resin, the durability and surface effect of the product are good, and if the hydroxyl acrylic organic silicon primer is replaced by oily/water-based unsaturated polyester resin or epoxy organic silicon resin, the required protective performance and adhesive force cannot be achieved.
Further, if the finish paint, especially the water-based finish paint, is directly sprayed on the surface of the vacuum coating layer, so that the adhesive force between the finish paint layer and the vacuum coating layer is generally not high, generally 1 grade, and cannot reach 0 grade, which is a technical difficulty to be overcome in the field, the technical scheme is characterized in that the PP treating agent is firstly sprayed on the surface of the vacuum coating layer, and then the polyacrylate baking paint is sprayed on the surface of the PP treating agent, so that the adhesive force between the vacuum coating layer and the finish paint layer can be remarkably improved, after the PP treating agent is used, the adhesive force between the finish paint layer and the vacuum coating layer can be improved to 0 grade, and the durability of a faucet product is greatly improved. The finish paint layer is made of polyacrylate baking paint, so that the vacuum coating layer can be protected from being damaged by oxidation, scratching and the like, and the prepared faucet has the appearance of high transparency, high gloss and good three-dimensional effect.
If the PP treating agent is sprayed between the base material and the primer layer, although the adhesive force between the base material and the primer layer can be effectively improved, the adhesive force between the finish paint layer and the vacuum coating layer cannot reach 0 grade; if the PP treating agent is sprayed between the primer layer and the vacuum coating layer, the adhesive force of the primer layer and the vacuum coating layer can be effectively improved, but the adhesive force of the finish paint layer and the vacuum coating layer cannot reach 0 grade; if the PP treating agent is sprayed on the surface of the finish paint layer, the transparency of the faucet is reduced, no surface protection effect exists, and the adhesive force between the finish paint layer and the vacuum coating layer cannot reach 0 level, so that the technical scheme can obviously improve the adhesive force between the vacuum coating layer and the finish paint layer by firstly spraying the PP treating agent on the surface of the vacuum coating layer and then spraying polyacrylate baking paint on the surface of the PP treating agent, and the adhesive force between the finish paint layer and the vacuum coating layer reaches 0 level.
Preferably, the PP treatment agent is a chlorinated polypropylene polymer or a chlorinated modified acrylic resin, wherein the PP treatment agent comprises one or more of the PP treatment agents of the type FTP-2, PP901 or PPXX. The PP treating agent can effectively wet the surface of the vacuum coating layer, and because the PP treating agent contains chloride ions, an anchoring reaction can be generated, and the bonding strength of the vacuum coating layer and the finish paint layer is increased.
Preferably, the base material is a tap brass or zinc alloy finish-polished piece.
Preferably, the polyacrylate baking varnish is water-based polyacrylate baking varnish, the polyacrylate baking varnish in one embodiment of the invention is a dual-purpose water-based primer top coat with the model number of WT700/WT600 of Huarun corporation, and the polyacrylate baking varnish in another embodiment of the invention is high-brightness acrylic varnish with the model number of PG 600.
Further, in step (3), the specific coating method of the multi-arc ion coating, the bias voltage and the magnetron sputtering coating is as follows: magnetron sputtering is carried out firstly, then direct current bias parameters are set for adding bias voltage, and multi-arc ion coating is carried out, so that the vacuum coating layer has high adhesive force and high metal luster at the same time. The direct current bias voltage has the function of accelerating and orienting ions to deposit on the surface of the base material, and the adhesive force of the vacuum coating layer on the base material is greatly improved.
Specifically, parameters of the dc bias voltage: bias voltage 80-90V, duty cycle: 50-65%; parameters of the multi-arc ion plating: voltage: 70-80V.
The multi-arc ion plating film is a method for directly evaporating metal on a solid cathode target by adopting an arc discharge method, an evaporant is ions of a cathode substance discharged from a cathode arc bright spot, so that the metal is deposited on the surface of a substrate to form a film, and the magnetron sputtering film is a method for bombarding the cathode target at a high speed under the action of an electric field by means of positive ions generated by gas discharge so that atoms or molecules in the target escape and are deposited on the surface of the plated substrate to prepare a required film.
Preferably, in the step (2), the raw materials of the silicone primer comprise, by weight, 33.44-51.37 parts of acrylic resin (hydroxyl type), 16.49-27.45 parts of silicone oligomer, 15.79-23.75 parts of ethylene glycol ethyl ether acetate, 1.97-2.11 parts of n-butanol, and 0.2 part of dispersant BYK 333;
the organic silicon oligomer contains 13.8 to 15.8 mass percent of methoxyl.
Preferably, the raw materials of the silicone primer comprise, by weight, 51.37 parts of acrylic resin (hydroxyl type), 16.49 parts of silicone oligomer (containing 14.8% of methoxyl group), 15.79 parts of ethylene glycol ethyl ether acetate, 1.97 parts of n-butyl alcohol and 0.2 part of dispersant BYK 333.
Specifically, the dispersant BYK333 helps the paint film disperse into a film.
It is worth to be noted that the organosilicon primer is a stable skeleton formed by alternately arranging Si atoms and O atoms, a side chain is connected with organic groups (such as methyl, phenyl, vinyl, epoxy groups) and the like through the Si atoms, and the heat stability of the organosilicon primer is high due to the fact that the Si-O bond energy in the organosilicon primer is higher than that of a C-C organic bond energy, so that the organosilicon primer has good temperature resistance, and the Si-O bond in the organosilicon primer is a main chain structure and has no double bonds, so that the organosilicon primer is not easily decomposed by ultraviolet light and ozone, and has good weather resistance. Furthermore, the polysiloxane compound in the organic silicon primer is one of the most known compounds without biological activity, so that the organic silicon primer has physiological inertia, and simultaneously, the organic silicon primer also has the properties of low surface tension, hydrophobicity and the like.
Therefore, the organic silicon primer is used, a hard, corrosion-resistant and temperature-resistant protective film layer can be formed through curing, a hydroelectric coating can be replaced, the primer layer serves as a transition layer, metal ions of a coating can be attached to the surface of the primer layer, and the substrate which cannot be used as a multi-arc ion coating becomes possible.
Further, in the step (2), the specific operation of curing the silicone primer is as follows: after the surface of the base material is sprayed with the organic silicon primer, the organic silicon primer is self-leveling and dried for 25-35 min, heated to 78-82 ℃, kept for 1.5-2.5h, and then heated to 145-155 ℃ and kept for 40 min.
If the organic silicon primer is directly coated in vacuum, the effect of multi-arc ion coating can be influenced, the metallic luster of the product is weaker, the organic silicon primer is cured, the finished product has better metallic luster, and the adhesive force of a coating layer and the organic silicon primer can be improved.
Specifically, in the process of curing the organic silicon primer, if the temperature is only set to 78-82 ℃, the time for the primer to reach a curing state is longer, and the production efficiency is lower; if the temperature is directly raised to 145-155 ℃ for a short time, the curing speed of the organic silicon primer is too fast, the resin crosslinking is accelerated, and the surface of the primer is not smooth, so the temperature is firstly heated to 78-82 ℃ and kept for 1.5-2.5h, and then the temperature is raised to 145-155 ℃. Wherein, in the two temperature ranges of 78-82 ℃ and 145-155 ℃, if the two temperature ranges are kept for a shorter time, the curing degree of the primer is lower, which is not beneficial to multi-arc ion plating; if the holding time in the two temperature ranges is too long, the curing degree of the primer is high, the adhesive force between the primer and the coating film is reduced, and the coating film may fall off.
Preferably, the specific operation of curing the silicone primer is as follows: after the surface of the base material is sprayed with the organic silicon primer, the organic silicon primer is self-leveling and dried for 30min, heated to 80 ℃ and kept warm for 2h, and then the temperature is raised to 150 ℃ and kept warm for 40 min.
Further, in the step (4), the specific operation of curing the PP treatment agent is as follows: drying PP treating agent by air for 15-25min or drying at 65-75 deg.C for 3-7 min.
Preferably, the specific operation of curing the PP treating agent is as follows: and (3) drying the PP treating agent for 20min by self-drying or drying the PP treating agent for 5min at 70 ℃.
Specifically, in the step (5), the concrete operation of curing the polyacrylate baking varnish is as follows: after spraying polyacrylate baking varnish, enabling the polyacrylate baking varnish to self-level and dry for 25-35 min, heating to 78-82 ℃, preserving heat for 1.5-2.5h, and then raising the temperature to 145-155 ℃ and preserving heat for 35-45 min.
Preferably, the concrete operation of curing the polyacrylate baking varnish is as follows: after spraying polyacrylate baking varnish, the polyacrylate baking varnish is self-leveling and dried for 30min, heated to 80 ℃ and kept warm for 2h, and then the temperature is raised to 150 ℃ and kept warm for 40 min.
Further, in the step (2), the thickness of the sprayed organic silicon primer is 20-25 μm;
in the step (4), the thickness of the PP treating agent sprayed is less than or equal to 5 mu m.
Preferably, in the step (5), the thickness of the polyacrylate baking varnish sprayed is 20-25 μm.
It is worth noting that the organic silicon primer plays a role in improving the adhesive force of the base material and the vacuum coating layer and protecting the base material from corrosion, if the spraying thickness of the organic silicon primer is too thick, the adhesive force can be reduced, if the spraying thickness of the organic silicon primer is too thin, the protective effect on the metal base material cannot be achieved, and the durability of corrosion resistance and the like is reduced. The PP treating agent can improve the binding force between the finish paint layer and the vacuum coating layer and the adhesive force of the vacuum coating layer, if the spraying thickness of the PP treating agent is too thick, residues visible to naked eyes can be left, the luster and the transparency of the primer layer are influenced, and the appearance is poor; the thickness of the PP treating agent sprayed is too thin, so that the PP treating agent cannot play a role in improving the adhesion. If the thickness of the polyacrylate baking varnish sprayed is too thick, the fullness and the stereoscopic impression of a finished product can be enhanced, but the adhesive force of the polyacrylate baking varnish is reduced; if the thickness of the polyacrylate baking varnish sprayed is too thin, the protective effect on the vacuum coating is difficult to play, and the appearance fullness is not enough.
Further, in the step (3), in the vacuum coating process, one or more of argon, acetylene, nitrogen and oxygen are introduced into the multi-arc ion coating box;
the target material adopted by the vacuum coating comprises one or two of chromium or titanium.
Different colors of coating films can be obtained by adopting different combinations of gas and target materials, so that products with various metal colors, such as silver, black, gold, color, rose gold, gun black and the like, can be prepared, and the partial combination of the gas and the target materials is shown in table 1:
Figure 605190DEST_PATH_IMAGE002
further, in the step (1), the specific operation of pretreating the surface of the substrate is as follows: and removing dust on the surface of the base material, ultrasonically cleaning to remove oil, and drying.
The surface of the base material is pretreated, and the adhesion between the organic silicon primer and the base material can be realized by sequentially carrying out dust removal and ultrasonic cleaning oil removal treatment.
Preferably, in step (1), the substrate is preheated to a temperature of 30 to 60 ℃.
After the base material is preheated at 30-60 ℃, the adhesive force between the organic silicon primer and the base material and between the polyacrylate baking varnish and the coating film is better.
The technical scheme of the invention is further illustrated by combining specific examples and comparative examples.
Example 1
A method for plating silver color film on the surface of a brass faucet by multi-arc ions comprises the following steps:
(1) pretreating the surface of the finely polished brass faucet, and preheating the pretreated brass faucet at the preheating temperature of 45 ℃;
(2) spraying an organic silicon primer on the surface of a brass faucet, enabling the organic silicon primer to be self-leveling and dried for 25min, heating to 80 ℃, preserving heat for 2h, then heating to 145 ℃, and preserving heat for 40min, wherein the organic silicon primer is a hydroxyl acrylic acid organic silicon coating, and the spraying thickness of the organic silicon primer is 20 microns;
(3) placing the brass faucet treated in the step (2) in a coating box, placing a chromium target in the coating box, vacuumizing and coating, then coating the brass faucet in the coating box in a multi-arc ion coating, bias voltage and magnetron sputtering coating mode, and introducing argon into the coating box in the coating process;
(4) spraying a PP treating agent on the surface of the coated brass faucet, wherein the spraying thickness of the PP treating agent is 5 mu m, and then self-drying the PP treating agent for 25 min;
(5) and (2) spraying polyacrylate baking paint (a dual-purpose water-based primer finish paint with the model of WT600 of Huarun company is selected) on the surface of the PP treating agent, wherein the spraying thickness of the polyacrylate baking paint is 25 mu m, then automatically leveling and drying the polyacrylate baking paint for 25min, heating to 78 ℃, preserving heat for 2.5h, then heating to 145 ℃, and preserving heat for 45min to obtain the brass faucet with silvery luster.
Example 2
A method for multi-arc ion plating of a color film on the surface of a brass faucet comprises the following steps:
(1) after the surface of the brass faucet after the fine polishing is subjected to pretreatment of dust removal, ultrasonic cleaning and oil removal and drying in sequence, preheating the brass faucet after drying, wherein the preheating temperature is 60 ℃;
(2) spraying an organic silicon primer on the surface of a brass faucet, enabling the organic silicon primer to be self-leveling and dried for 30min, heating to 82 ℃, preserving heat for 1.5h, then heating to 150 ℃, and preserving heat for 40min, wherein the organic silicon primer is a hydroxyl acrylic acid organic silicon coating, and the thickness of the organic silicon primer is 15 microns;
(3) placing the brass faucet treated in the step (2) in a coating box, placing a titanium target material in the coating box, vacuumizing and coating, then coating the brass faucet in the coating box in a multi-arc ion coating, bias voltage and magnetron sputtering coating mode, and introducing oxygen into the coating box in the coating process;
(4) spraying a PP treating agent on the surface of the brass faucet after coating, wherein the spraying thickness of the PP treating agent is 4 mu m, and then drying the PP treating agent for 5min at 70 ℃;
(5) and (2) spraying polyacrylate baking paint (a dual-purpose water-based primer finish paint with the model of WT700 from Huarun company is selected) on the surface of the PP treating agent, wherein the spraying thickness of the polyacrylate baking paint is 20 mu m, then automatically leveling and drying the polyacrylate baking paint for 30min, heating to 80 ℃, preserving heat for 2h, then heating to 150 ℃, and preserving heat for 40min to obtain the brass faucet with color golden gloss.
Example 3
A method for plating a gold color film on the surfaces of a zinc alloy handle and a brass faucet by multi-arc ions comprises the following steps:
(1) pretreating the surfaces of the finely polished zinc alloy handle and the brass main body, and preheating the pretreated blank at the preheating temperature of 30 ℃;
(2) spraying an organic silicon primer on the surface of the blank, heating to 78 ℃ after the organic silicon primer is self-leveled and dried for 35min, preserving heat for 2.5h, then raising the temperature to 155 ℃ and preserving heat for 40min, wherein the organic silicon primer is a hydroxyl acrylic acid organic silicon coating, and the thickness of the sprayed organic silicon primer is 25 mu m;
(3) placing the blank processed in the step (2) in a coating box, placing a titanium target material in the coating box, vacuumizing and coating, then carrying out multi-arc ion coating, bias voltage and magnetron sputtering coating on the blank in the coating box, and introducing nitrogen into the coating box in the coating process;
(4) spraying a PP treating agent on the surface of the coated blank, wherein the spraying thickness of the PP treating agent is 5 mu m, and then drying the PP treating agent for 7min at 68 ℃;
(5) and (2) spraying polyacrylate baking varnish (high-brightness acrylic varnish of PG600 type from Huarun company) on the surface of the PP treating agent, wherein the spraying thickness of the polyacrylate baking varnish is 22 mu m, then self-leveling and drying the polyacrylate baking varnish for 35min, heating to 82 ℃, preserving heat for 1.5h, then heating to 155 ℃, and preserving heat for 40min to obtain the faucet with golden gloss.
In examples 1 to 3, the raw material formulation of the silicone primer is shown in table 2 below:
Figure 991172DEST_PATH_IMAGE003
specifically, the faucets having metallic luster obtained in examples 1 to 3 were respectively subjected to performance tests according to the test standards and methods shown in table 3 below, and the test results are shown in table 4 below.
Figure DEST_PATH_IMAGE004
Figure 708593DEST_PATH_IMAGE005
The detection results in table 4 show that the adhesion force of the faucet with metallic luster prepared by the technical scheme can reach 0 grade, the metallic luster of the surface of the faucet is strong, and the faucet is good in salt spray resistance, acid resistance and alkali resistance.
Comparative example 1
The comparative example is a method for plating a silver color film on the surface of a brass faucet by multi-arc ions, the preparation method of the comparative example 1 is basically the same as that of the example 1, except that the surface of the brass faucet is not sprayed with an organic silicon primer, multi-arc ion plating is directly carried out, and the brass faucet with the silver color is prepared by the method.
Comparative example 2
The preparation method of the comparative example is basically the same as that of example 1, except that the polyacrylate baking varnish is directly sprayed after vacuum coating in the comparative example, and the PP treating agent is not sprayed, so that the silver brass faucet is prepared by adopting the method.
Comparative example 3
The preparation method of the comparative example is basically the same as that of the example 1, except that the comparative example is prepared by spraying a layer of PP treating agent after the organic silicon primer is sprayed, then carrying out vacuum coating and spraying polyacrylate baking varnish, and the brass faucet with silver luster is prepared by adopting the method.
Comparative example 4
The preparation method of the comparative example is basically the same as that of the example 1, except that the formulation of the primer is different, and the primer in the comparative example is prepared by using 67.13 parts by weight of 50% acrylic resin (hydroxyl type), 6.38 parts by weight of organic silicon oligomer (containing 14.8% of methoxyl group), 10.57 parts by weight of ethylene glycol ethyl ether acetate, 1.93 parts by weight of n-butyl alcohol and 0.2 part by weight of dispersant BYK333, and the brass faucet with silvery luster is prepared by using the primer and the preparation method of the example 1.
Specifically, the brass taps having silvery luster obtained in comparative examples 1 to 4 were each subjected to performance testing according to the testing criteria and methods in table 3 above, and the testing search thereof is shown in table 5 below.
Figure DEST_PATH_IMAGE006
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.

Claims (10)

1. A method for preparing a faucet with metallic luster by coating a brass or zinc alloy substrate is characterized by comprising the following steps:
(1) pretreating the surface of a base material, and preheating the pretreated base material, wherein the base material is brass or zinc alloy;
(2) spraying an organic silicon primer on the surface of the base material, and curing, wherein the organic silicon primer is a hydroxyl acrylic organic silicon coating;
(3) placing the substrate treated in the step (2) in a coating box for vacuum coating in a mode of multi-arc ion coating plus bias voltage plus magnetron sputtering coating;
(4) spraying a PP treating agent on the surface of the base material after the coating, and curing;
(5) and (5) spraying polyacrylate baking varnish on the surface of the base material cured in the step (4), and curing to obtain the faucet with metallic luster.
2. The method for preparing a metallic lustrous faucet by coating a brass or zinc alloy substrate with a film according to claim 1, characterized in that in the step (2), the raw materials of the silicone primer include 33.44-51.37 parts by weight of acrylic resin (hydroxyl type), 16.49-27.45 parts by weight of silicone oligomer, 15.79-23.75 parts by weight of ethylene glycol ethyl ether acetate, 1.97-2.11 parts by weight of n-butanol, 0.2 parts by weight of dispersant BYK 333;
the organic silicon oligomer contains 13.8 to 15.8 mass percent of methoxyl.
3. The method for coating a brass or zinc alloy substrate with a metallic luster faucet as recited in claim 1, wherein in the step (3), the specific coating manner of the multi-arc ion coating, the bias voltage and the magnetron sputtering coating is as follows: carrying out magnetron sputtering on a substrate, setting direct-current bias parameters to add bias voltage, and carrying out multi-arc ion coating;
parameters of the dc bias: bias voltage 80-90V, duty cycle: 50-65%; the power for multi-arc ion plating is 70-80V.
4. The method for preparing a metallic lustrous faucet by coating a brass or zinc alloy substrate with a film according to claim 1, characterized in that in the step (4), the PP treatment agent is a chlorinated polypropylene polymer or a chlorinated modified acrylic resin, wherein the PP treatment agent includes one or more of the PP treatment agents of the type FTP-2, PP901 or PPXX.
5. The method for preparing a metallic lustrous faucet by coating brass or zinc alloy substrate with film according to claim 1, characterized in that, in the step (2), the concrete operation of curing the silicone primer is as follows: after the surface of the base material is sprayed with the organic silicon primer, the organic silicon primer is self-leveling and dried for 25-35 min, heated to 78-82 ℃, kept for 1.5-2.5h, and then heated to 145-155 ℃ and kept for 40 min.
6. The method for preparing a metallic lustrous faucet by coating brass or zinc alloy substrate with film according to claim 1, characterized in that, in the step (4), the PP treating agent is solidified by the following specific operations: drying PP treating agent by air for 15-25min or drying at 65-75 deg.C for 3-7 min.
7. The method for preparing the metallic luster faucet by coating the brass or zinc alloy substrate with the film according to the claim 1, wherein in the step (5), the concrete operation of curing the polyacrylate baking paint is as follows: after spraying polyacrylate baking varnish, enabling the polyacrylate baking varnish to self-level and dry for 25-35 min, heating to 78-82 ℃, preserving heat for 1.5-2.5h, and then raising the temperature to 145-155 ℃ and preserving heat for 35-45 min.
8. The method for preparing a metallic lustrous faucet by coating a brass or zinc alloy substrate with a film according to claim 1, characterized in that in the step (2), the silicone primer is sprayed with a thickness of 20-25 μm;
in the step (4), the thickness of the PP treating agent sprayed is less than or equal to 5 mu m;
in the step (5), the thickness of the polyacrylate baking varnish sprayed is 20-25 μm.
9. The method for preparing a metallic lustrous faucet by coating a brass or zinc alloy substrate according to claim 1, characterized in that in the step (3), one or more of argon, acetylene, nitrogen and oxygen are introduced into the multi-arc ion coating box during vacuum coating;
the target material adopted by the vacuum coating comprises one or two of chromium or titanium.
10. The method for preparing a metallic lustrous faucet by coating a brass or zinc alloy substrate with a film according to claim 1, characterized in that, in the step (1), the specific operation of pre-treating the substrate surface is: removing dust on the surface of the base material, performing ultrasonic cleaning to remove oil, and drying;
in the step (1), the preheating temperature of the substrate is 30-60 ℃.
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