WO2005001160A1 - 鉛含有銅合金製水道用器具の製造方法 - Google Patents
鉛含有銅合金製水道用器具の製造方法 Download PDFInfo
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- WO2005001160A1 WO2005001160A1 PCT/JP2004/007255 JP2004007255W WO2005001160A1 WO 2005001160 A1 WO2005001160 A1 WO 2005001160A1 JP 2004007255 W JP2004007255 W JP 2004007255W WO 2005001160 A1 WO2005001160 A1 WO 2005001160A1
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- water
- lead
- antifouling
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- treatment
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- 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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
- C23C28/023—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only
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- 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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
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- 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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
- C23C28/021—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material including at least one metal alloy layer
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/48—After-treatment of electroplated surfaces
Definitions
- the present invention relates to a method for producing a lead-containing copper alloy water supply device.
- Bronze and brass which are lead-containing copper alloys, are used for faucet fittings and water supply appliances such as water pipes from the viewpoint of corrosion resistance and machinability.
- Such water equipment made of a lead-containing copper alloy was usually manufactured as follows. That is, first, a work made of a forged product, a forged product, a bar material or a tube material is prepared. This work is made of a lead-containing copper alloy and has a water passage for passing water. After performing a cutting process on this work in a cutting process, a polishing process is performed in a polishing process. Then, a plating step of applying a nickel-chromium plating layer to the outer peripheral surface of the work is performed.
- a nickel plating step using a nickel plating bath is performed after the pretreatment step. Thereby, a nickel plating layer is applied to the outer peripheral surface of the work. The nickel plating layer achieves a smooth surface and excellent corrosion resistance. Thereafter, a chrome plating layer is applied to the outer peripheral surface of the work by a chrome plating process using a chrome plating bath. Note that there is a washing step of washing the plating bath with water between each plating step. Then, the work is assembled by an assembling process to obtain a water supply device. The water supply equipment thus obtained will be used after water is passed through the water channel. In addition, this water appliance exhibits excellent decorativeness due to the mirror gloss of the chrome-plated layer.
- Patent Document 2 it is conceivable to apply an antifouling treatment agent to a water supply device obtained by a general manufacturing method. If the antifouling agent is applied to the surface of the water appliance, the resulting water appliance will have an antifouling property provided by an antifouling film made of the antifouling agent.
- water supply appliances disclosed in Non-Patent Documents 1 and 2 have also been proposed. This water supply device is manufactured by a manufacturing method in which a base plating step including a nickel plating step, a satin nickel plating step, and a water-repellent plating step, a chrome plating step, and a heating step are sequentially performed.
- a nickel plating bath to which polytetrafluoroethylene (PTFE) particles are added is used.
- PTFE polytetrafluoroethylene
- the PTFE particles exposed on the chrome-plated layer are spread on the surface.
- there is a water washing step of washing the plating bath with water is provided with water repellency by PTFE present on the surface.
- Patent Document 2 proposes a manufacturing method in which, after the plating step, a work is immersed in a lead-free solution to perform a lead-free process of performing a lead-free treatment on an inner peripheral surface of a water passage of the work. According to this manufacturing method, the amount of lead eluted into the water from the inner peripheral surface of the water passage can be reduced more reliably.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2001-295334
- Patent Document 2 WO02 / 36856A1
- Non-patent Document 1 Yuji Light News (Tefujit System with water-repellent plating), written by Yutaka Yoshikawa and Kenichi Nishikawa, May 2000, P. 7
- Non-patent Document 2 “Surface Technology Association Metsuki Subcommittee June Regular Meeting Material”, June 15, 2000, P. 21-25
- the water supply device disclosed in Patent Document 1 described above is simply a surface of a water supply device coated with an antifouling treatment agent, so that the antifouling film is easily peeled off from the chrome-plated layer. Soil properties, especially after long-term use, are not sufficient.
- the antifouling agent disclosed in Japanese Patent Application Laid-Open No. 2000-290089 is a glass containing an organic silicon compound chemically bonded to a hydroxyl group present on the surface of an object by a dehydration reaction and fluorine. It is effective for ceramics with a layer, but for water supply where the surface is a chrome-plated layer. Sufficient antifouling properties cannot be imparted to the equipment.
- Non-Patent Documents 1 and 2 by adopting PTFE particles, it is inevitable that the surface will have a dull appearance, and therefore, satin Means such as performing a nickel plating step to make the surface satin-finished are employed.
- the water supply device obtained by the conventional manufacturing method has antifouling properties due to water repellency, but does not have specular gloss.
- the present invention has been made in view of the above-described conventional circumstances, and has excellent antifouling properties while sufficiently reducing the amount of lead eluted into water from the inner peripheral surface of a water passage. At the same time, it is an issue to be solved to provide a lead-containing copper alloy water supply device having excellent decorativeness due to mirror surface light.
- the water supply device is made of a lead-containing copper alloy and has a base material 90 having a water passage 90a through which water passes, and a nickel plating layer 91 formed on the surface side of the base material 90. And a chrome-plated layer 92 formed on the surface side of the nickel-plated layer 91.
- the manufactured water supply device has a chromium coating ( The passivation film 93 made of xCr ⁇ -yCrO ( ⁇ ⁇ ) etc. is completely formed.
- the passivation film 93 is formed by chromic acid in a chrome plating bath in a water washing process after the chrome plating process for applying the chrome plating layer 92.
- the present inventors use a polymer that can bond to chromium and contains fluorine, and forms an antifouling film on the outer peripheral surface of the work before the passivation film 93 is completely formed. As a result, they have found that the problem of the present invention can be solved.
- the method for producing a lead-containing copper alloy water supply device of the present invention includes a plating step of applying a nickel-chromium plating layer to an outer peripheral surface of a work made of a lead-containing copper alloy and having a water passage through which water passes. A step of immersing the work in a deleading solution after the plating step to delead the inner peripheral surface of the water passage. During the process, a polymer containing fluorine that can bind to chromium And performing an antifouling treatment step of forming an antifouling film on the outer peripheral surface of the work.
- the workpiece in the de-leading step, is immersed in a de-leading solution after the plating step to perform a de-leading treatment on the inner peripheral surface of the water passage.
- the amount of lead eluted into water can be reduced more reliably.
- the antifouling treatment step of forming an antifouling film on the outer peripheral surface of the work during the deleading step since the antifouling treatment step of forming an antifouling film on the outer peripheral surface of the work during the deleading step, the passivation film is completely formed on the chrome-plated layer. Before being formed, an antifouling film is formed, and the resulting water supply device is a firmly bonded antifouling film. Further, in this production method, since the PTFE particles are not used, the obtained water supply device has a mirror-like gloss.
- the polymer that can bond to chromium and contains fluorine those disclosed in JP-A-2000-62105 can be used.
- the functional group-containing fluorine-containing ethylene monomer which is one of the components constituting the polymer, is preferably one represented by Chemical Formula 1, Chemical Formula 2, or Chemical Formula 3. This is because the double bond of oxygen is replaced by the bond with chromium in the chromium plating layer, and the antifouling film is firmly bonded to the chromium plating layer.
- lead removing liquid since lead is an amphoteric metal, an acidic liquid or an alkaline liquid may be used.
- the lead removal step employs an acid treatment step of dipping the work after the plating step in a treatment liquid containing an acid, and an acid treatment water washing step of washing the treatment liquid from the work after the acid treatment step.
- S power In this case, it is preferable to carry out the antifouling treatment step during the acid treatment water washing step.
- a passivation film is gradually formed on the surface of the chromium plating layer. Therefore, if the antifouling treatment step is performed during the acid treatment and water washing step in the lead removal step, the passivation film becomes This is because the antifouling film can be formed on the surface of the chrome-plated layer before being firmly formed on the surface.
- the treatment liquid containing an acid used in the acid treatment step activates the chrome-plated layer on the outer peripheral surface of the work, and forms an antifouling film firmly on the surface of the chrome-plated layer.
- the treatment liquid containing an acid also functions as a lead removal liquid for performing a lead removal treatment on the inner peripheral surface of the water passage.
- Chromic acid, phosphoric acid, hydrochloric acid, sulfuric acid, acetic acid, nitric acid and the like can be used as the acid contained in the treatment liquid used in the acid treatment step. It is preferable that this treatment liquid has a concentration that does not corrode the chromium plating layer.
- chromic acid having a Cr 6+ concentration of several thousand to several hundred thousand ppm, phosphoric acid of 0.1 to 10%, or the like can be employed.
- the work after the plating step is immersed in an active alkali solution to etch lead from the inner peripheral surface of the water passage, and the work after the etching step.
- an acid treatment water washing step of washing the treatment liquid from the work after the acid treatment 'passivation step.
- the antifouling treatment step is preferably performed during the acid-treated water washing step.
- the active alkaline solution in the etching step is also used as a lead-free solution for performing a lead-free treatment on the inner peripheral surface of the water passage.
- Activated alkaline solution refers to an alkaline solution having a pH in the range of 12-14. pH force S According to the active alkaline solution in this range, the active alkaline solution easily causes a chemical reaction with lead on the inner peripheral surface of the water passage, so that the lead is easily dissolved and removed.
- Such activated alkaline solutions are mainly aqueous solutions of sodium carbonate, sodium hydroxide, sodium phosphate, sodium metasilicate, sodium tripolyphosphate, sodium onolesilicate, potassium hydroxide, and the like.
- Phosphoric acid is a series of acids (P O ⁇ ⁇ ) generated by hydration of phosphorus pentoxide (P ⁇ ) to various degrees.
- phosphate zinc phosphate, manganese phosphate, iron phosphate, zinc phosphate calcium phosphate, and the like can be used.
- Zinc phosphates include zinc monobasic phosphate ( ⁇ ( ⁇ PO
- sodium phosphate NaH PO, Na HP ⁇ , etc.
- Anoreminium phosphate (A1 (H PO), etc.), ammonium phosphate (NH H PO, etc.), etc.
- a passivation film is formed on the inner peripheral surface of the water passage, and the passivation film prevents the leaching of lead.
- this passivation film is formed as follows when a treatment solution containing zinc monophosphate (Zn (HPO)) and phosphoric acid (HPO) as main components is used. Conceivable.
- lead If lead is present on the inner peripheral surface of the water passage of the work, as shown in Chemical formula 5, lead can also be dissolved in the treatment liquid by phosphoric acid to generate lead ions. [0031] [Formula 5]
- part of the zinc monophosphate is dissociated in the treatment solution.
- the passivation film thus formed can prevent lead leaching.
- phosphoric acid or phosphate is less toxic than a chromium plating bath containing chromic acid for forming a chromium plating layer or a chromate solution containing chromic acid for passivation. Absent. For this reason, it is possible to dispose of the cleaning liquid and the waste liquid only by neutralizing or diluting the cleaning liquid and the waste liquid after the contact with the processing liquid. Therefore, management of the cleaning liquid and the like is also simplified.
- the acid-treated water-washing step is usually performed by sequentially immersing the work in a plurality of water-washing tanks.
- the concentration of the water treatment liquid in the washing tank is gradually reduced, thereby eliminating environmental problems.
- the water stored in the washing tank may be water at room temperature or hot water at 40-60 ° C.
- the antifouling treatment step can be performed by adding an antifouling liquid in which a polymer is dispersed to at least one washing tank.
- the production method of the present invention can be carried out using an ordinary production line for water supply equipment as it is.
- the antifouling liquid may be added to a hot water washing tank that stores hot water among a plurality of washing tanks.
- the hot water washing in which the acid-treated water washing step is performed with warm water is usually located at the most downstream side of the water washing in which the acid-treated water washing step is performed with water at room temperature.
- the processing liquid can be completely removed from the work, and the water can be easily volatilized from the washed work, so that the drying step can be omitted. If an antifouling treatment step is performed during hot water washing, it is considered that the antifouling film is more activated and is firmly bonded to chromium in the chrome plating layer.
- an antifouling liquid to the downstream side of the plurality of washing tanks. If the lead removal step after the plating step is performed without going through the rinsing step from the chrome plating step, the water in the rinsing tank contains a chromium plating bath with a higher concentration toward the upstream side. Therefore, when the antifouling liquid is added to the upstream washing tank, the polymer of the antifouling liquid is combined with the chromium in the chromium plating bath and is wasted.
- the antifouling liquid is added to the downstream washing tank, the polymer of the antifouling liquid more reliably binds to the chromium in the chrome-plated layer of the work, and the antifouling film is reliably formed. It will be.
- a work for a faucet fitting that can employ various things.
- the faucet is used to remove dirt with water or hot water, and it is easy for dirt to adhere to it.
- the present invention is implemented as follows according to the respective steps shown in FIG. First, prepare a workpiece made of JISCAC406 (six kinds of bronze) consisting of forged products, forged products, bars or pipes To do. This work is for faucet fittings. This workpiece is subjected to a cutting process in a cutting process S10, and then a polishing process is performed in a polishing process S20. Thus, as shown in FIG. 4A, a workpiece W after the polishing step S20 is obtained. This work W consists only of the base material 1 having the water passage la through which water passes. As shown in FIG. 1, the work W is subjected to a plating step S30 of applying a nickel-chromium plating layer on the outer peripheral surface.
- JISCAC406 six kinds of bronze
- the plating step S30 after the pretreatment step, a nickel plating step using a nickel plating bath and a chrome plating step using a chromium plating bath are performed.
- the nickel plating layer 2 is applied to the outer peripheral surface of the work W.
- the nickel plating layer 2 realizes a smooth surface and excellent corrosion resistance.
- a chrome plating layer 3 is applied to the outer peripheral surface of the work W. Note that there is a washing step of washing the plating bath with water between each plating step.
- an etching step S41 is performed.
- the active alkaline solution is a strong alkaline aqueous solution having a pH of 14 and containing 50 g / l of sodium hydroxide, and its temperature is 50 ° C.
- a low-lead layer 4 containing less lead is formed on the inner peripheral surface of the water passage la.
- an etching water washing step S42 is performed.
- the active alkali solution is washed from the work W after the etching step S41.
- an “acid treatment” passivation step S43 is performed.
- the workpiece W after the etching water washing step S42 is immersed in a treatment solution containing phosphoric acid for 10 minutes.
- This treatment solution contains phosphoric acid (HPO) 0.
- the acid-treated water-washing step S44 includes a water-washing tank 11-11 for performing water washing in two to six steps, and a hot-water washing tank 14, 15 for performing hot water washing in two steps. This is performed by sequentially immersing the workpiece W after the acid treatment and the passivation step S43 in these.
- Water temperature of water washing The temperature is room temperature, and the temperature of hot water for washing with hot water is 40-60 (50 ⁇ 10). C.
- the pH of the water in the rinsing tanks 11 and 13 and the hot rinsing tanks 14 and 15 is gradually reduced from 3 to 5.5, ', 7 7, and environmental problems are eliminated. If the pH of the water in the most upstream washing tank 11 becomes lower than the limit, the washing tank 11 is turned to the purification treatment, and the downstream washing tank 1213 is sequentially moved to the upstream side.
- an antifouling liquid (manufactured by Daikin Industries, Ltd.) in which a polymer containing fluorine that can bind to chromium and is dispersed is prepared.
- the polymer in this antifouling liquid is composed of a functional group-containing fluorinated ethylene monomer.
- Example 1 as the antifouling treatment step S44, the antifouling liquid was added to one of the water rinsing tanks 12 of the water rinsing tanks 11 to 13 in an amount of 0.1% by mass based on the water. According to the tests by the inventors, the antifouling liquid can be added up to about 10% by mass of water.
- the work W shown in Figs. 4 (E) and 5 is obtained by using the usual faucet fitting production line as it is. Then, as shown in FIG. 1, the work W is assembled in an assembling step S50 to obtain an antifouling faucet fitting.
- the obtained antifouling faucet fitting includes a base material 1 having a water passage la through which water passes, a nickel plating layer 2 formed on the outer peripheral surface side of the base material 1, A chrome-plated layer 3 formed on the outer peripheral surface of the nickel plating layer 2; a polymer antifouling film 6 formed on the outer peripheral surface of the chrome-plated layer 3; It comprises a low lead layer 4 formed on the surface side, and a passivation film 5 formed on the inner peripheral surface side of the low lead layer 4.
- the work W is immersed in an active alkali solution and a treatment liquid to perform a de-leading treatment on the inner peripheral surface of the water passage la. Since the low lead layer 4 and the passive film 5 are formed on the inner peripheral surface of the water channel la, the amount of lead eluted into the water from the inner peripheral surface of the water channel la can be reduced more reliably.
- the antifouling faucet had a water contact angle of 95 ° or more, and had excellent antifouling properties such as water repellency. In particular, the antifouling faucet has an excellent durability with almost no decrease in water contact angle even when used.
- the passivation film 93 as shown in FIG. 10 is not firmly formed on the surface of the chromium plating layer 3.
- Antifouling film 6 on the surface of chrome-plated layer 3 Since the antifouling faucet is obtained, the antifouling film 6 is firmly bonded. Further, in this manufacturing method, since the PTFE particles were not used, the obtained antifouling faucet had a specular gloss.
- Example 1 the washing tanks 11 and 13 other than the washing tank 12 or all the washing tanks 11
- Example 2 as the antifouling treatment step S44, as shown in FIG. 6, the antifouling liquid was added to the hot water washing tank 14 in an amount of 0.1% by mass relative to water. Other conditions are the same as in Example 1.
- the same antifouling faucet fitting can also be manufactured by this manufacturing method.
- an antifouling liquid can be added to the hot and cold water rinsing tanks 15 other than the hot and cold water rinsing tanks 14 or both the hot and cold water rinsing tanks 14 and 15.
- Example 3 as the antifouling treatment step S44, as shown in FIG. 7, a line of the antifouling treatment tank 21 is provided between the two washing tanks 12 and 13 on the downstream side.
- the antifouling treatment tank 21 0.1% by mass of antifouling liquid is added to hot water at 65 ° C.
- Other conditions are the same as in Example 1. With this manufacturing method, the same antifouling faucet can be manufactured by only slightly changing the manufacturing line for ordinary water supply equipment.
- Example 4 as the antifouling treatment step S44, a line of the antifouling treatment tank 21 is provided between the hot and cold water washing tanks 14 and 15, as shown in FIG. Other conditions are the same as in the third embodiment. Also in this manufacturing method, the same operation and effect as in the third embodiment can be obtained.
- an acid treatment and a reactivation treatment step S45 are performed after the etching step S41 and the etching water washing step S42.
- the treatment liquid used at this time is an aqueous solution of chromic acid having a Cr 6+ concentration of several hundred thousand to several hundred thousand ppm, phosphoric acid of 0.110%, or the like.
- This treatment liquid activates the chrome-plated layer 3 on the outer peripheral surface of the workpiece W, and the Formed firmly on the surface of plating layer 3.
- the treatment liquid also performs a lead removal treatment on the inner peripheral surface of the water passage la.
- the acid-treated water-washing step and the antifouling treatment step S44 of Example 1 and the like are performed.
- Other conditions are the same as those in Example 1. Also in this manufacturing method, the same functions and effects as those of the first embodiment can be obtained.
- a normal faucet having no antifouling property on the surface was once manufactured, and an antifouling liquid was directly applied to the faucet.
- the antifouling faucet thus obtained had a water contact angle of 8590 °, the water contact angle was reduced by use and the durability was immediately deteriorated. This is because, in this antifouling faucet fitting, since the faucet fitting once manufactured has the passivation film 93 as shown in FIG. 10, the antifouling film does not bond firmly.
- the amount of lead eluted into the water from the inner peripheral surface of the water passage la is sufficiently reduced, while having excellent antifouling properties and a mirror surface. It can be seen that an antifouling faucet with excellent decorativeness due to gloss can be obtained.
- the present invention relates to a method for producing a lead-containing copper alloy water supply device.
- FIG. 1 is a process chart showing a production method of Examples 115.
- FIG. 2 is a process chart showing a production method of Example 14;
- FIG. 3 is a process chart showing an acid treatment water washing step and an antifouling treatment step of the production method of Example 1.
- FIG. 4 (A) is a cross-sectional view of the work after the polishing step
- FIG. 4 (B) is a cross-sectional view of the work after the attaching step
- FIG. 4 (C) is a cross-sectional view of the work after the etching step
- FIG. Is is a cross-sectional view of the work after the acid treatment / passivation step
- FIG. (E) is a cross-sectional view of the work after the antifouling treatment step.
- FIG. 5 is an enlarged sectional view of a work after an antifouling treatment process.
- FIG. 6 is a process chart showing an acid treatment water washing step and an antifouling treatment step of the production method of Example 2.
- FIG. 7 is a process chart showing an acid treatment water washing step and an antifouling treatment step of the production method of Example 3.
- FIG. 8 is a process chart showing an acid-treated water-washing step and an antifouling treatment step of the production method of Example 4.
- FIG. 9 is a process chart showing the production method of Example 5.
- FIG. 10 is an enlarged sectional view of a work according to a conventional example and a comparative example 2.
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DE102007055446A1 (de) * | 2007-11-12 | 2009-05-14 | Hansgrohe Ag | Bereitstellung von wasserführenden Bauteilen aus Messinglegierungen mit verringerter Metallionenfreisetzung |
WO2018180837A1 (ja) * | 2017-03-27 | 2018-10-04 | 株式会社Lixil | 水道用器具の製造方法、及び水道用器具 |
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Citations (3)
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JP2000062105A (ja) * | 1998-08-24 | 2000-02-29 | Daikin Ind Ltd | 含フッ素ポリマーからなる透明層を有する構造体とそれを用いた反射板 |
WO2002036856A1 (fr) * | 2000-10-31 | 2002-05-10 | Inax Corporation | Procede d'enlevement du plomb d'article cylindrique plaque en alliage de cuivre contenant du plomb et article metallique pour prise d'eau, procede pour empecher la dissolution du plomb d'un article en alliage de cuivre contenant du plomb et article metallique pour prise d'eau |
JP2004217950A (ja) * | 2003-01-09 | 2004-08-05 | Daikin Ind Ltd | めっき皮膜用表面処理剤 |
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JP2000062105A (ja) * | 1998-08-24 | 2000-02-29 | Daikin Ind Ltd | 含フッ素ポリマーからなる透明層を有する構造体とそれを用いた反射板 |
WO2002036856A1 (fr) * | 2000-10-31 | 2002-05-10 | Inax Corporation | Procede d'enlevement du plomb d'article cylindrique plaque en alliage de cuivre contenant du plomb et article metallique pour prise d'eau, procede pour empecher la dissolution du plomb d'un article en alliage de cuivre contenant du plomb et article metallique pour prise d'eau |
JP2004217950A (ja) * | 2003-01-09 | 2004-08-05 | Daikin Ind Ltd | めっき皮膜用表面処理剤 |
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