KR100837607B1 - Electroless nikel plating method of a water metel - Google Patents

Electroless nikel plating method of a water metel Download PDF

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Publication number
KR100837607B1
KR100837607B1 KR1020070023525A KR20070023525A KR100837607B1 KR 100837607 B1 KR100837607 B1 KR 100837607B1 KR 1020070023525 A KR1020070023525 A KR 1020070023525A KR 20070023525 A KR20070023525 A KR 20070023525A KR 100837607 B1 KR100837607 B1 KR 100837607B1
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South Korea
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water meter
minutes
water
washing
nickel plating
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KR1020070023525A
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Korean (ko)
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한민흠
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주식회사 대경미터기
한민흠
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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
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/1601—Process or apparatus
    • 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
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/1601—Process or apparatus
    • C23C18/1633—Process of electroless plating
    • C23C18/1675—Process conditions
    • 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
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/1601—Process or apparatus
    • C23C18/1633—Process of electroless plating
    • C23C18/1675—Process conditions
    • C23C18/168—Control of temperature, e.g. temperature of bath, substrate
    • 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
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/1601—Process or apparatus
    • C23C18/1633—Process of electroless plating
    • C23C18/1675—Process conditions
    • C23C18/1683—Control of electrolyte composition, e.g. measurement, adjustment
    • 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
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/1601—Process or apparatus
    • C23C18/1633—Process of electroless plating
    • C23C18/1689—After-treatment
    • 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
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/31—Coating with metals
    • C23C18/32—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron

Abstract

An electroless nickel plating method of a water meter is provided to improve strength of the water meter, prevent corrosion of the water meter, and allow lead to be detected in the amount of not higher than 0.005 parts per million at the lead leaching test by forming an electroless nickel plating layer on a body surface of the water meter. An electroless nickel plating method of a water meter comprises the steps of: processing a water meter(10) having connecting parts(13) formed at both sides thereof, a cover(12) installed at a top part thereof, and a body(11) formed therein to measure a flow rate of water, dipping the processed water meter in an alkaline degreasing solution for 30 minutes, and washing the degreased water meter twice; mixing nitric acid having a concentration of 50% with water, pickling the washed water meter with the aqueous nitric acid solution for 10 to 15 minutes, and washing the pickled water meter twice; electrolytically degreasing the washed water meter for 10 to 20 minutes, washing the electrolytically degreased water meter twice, dipping the washed water meter into an aqueous sulfuric acid solution for 10 minutes to pickle the water meter, and washing the pickled water meter twice; performing electroless nickel plating of the washed water meter at a temperature of 85 to 90 deg.C for 35 to 40 minutes, and washing the nickel coated water meter twice; neutralizing the washed water meter in an aqueous sodium cyanide solution for 2 minutes, and washing the neutralized water meter twice; dipping the washed water meter into an aqueous chromic acid solution for 5 to 10 minutes, and washing the water meter three times; and dipping the washed water meter into warm water with a temperature of 60 to 70 deg.C for 2 minutes, drying the water meter using air, and drying the dried water meter in a drying furnace for 15 minutes, wherein the electroless nickel plating step comprises coating nickel an electroless nickel plating solution on the water meter to a thickness of 5 to 7 mum at a temperature of 85 to 90 deg.C and pH of 4.5 to 4.8 for 35 to 40 minutes.

Description

수도미터기 무전해 니켈 도금방법{Electroless nikel plating method of a water metel}Electroless nikel plating method of a water metel

도 1 은 본 발명이 실시되는 예시도를 나타낸 단면도1 is a cross-sectional view showing an exemplary view of the present invention

도 2 는 본 발명의 수도미터기에 대한 사시도2 is a perspective view of the water meter of the present invention

도 3 은 본 발명의 수도미터기에 대한 정면도3 is a front view of the water meter of the present invention

도 4 는 본 발명의 수도미터기에 대한 평면도4 is a plan view of the water meter of the present invention

[도면의 주요부분에 대한 부호의 설명][Explanation of symbols on the main parts of the drawings]

10 : 수도미터기 11 : 몸체10: water meter 11: body

12 : 뚜껑 13 : 연결부12: lid 13: connection

15 : 보호통15: protective case

본 발명은 수도미터기 무전해 니켈 도금방법에 관한 것으로, 더욱 상세하게 는 수도미터기의 몸체 표면에 무전해 니켈 도금층을 형성하여 줌으로써, 수도미터기의 강도를 향상시키고 부식을 방지하여 납 용출시험에서 0.005ppm 이하가 검출되도록 하는 수도미터기 무전해 니켈 도금방법에 관한 것이다.The present invention relates to a electroless nickel plating method of the water meter, and more particularly, by forming an electroless nickel plating layer on the body surface of the water meter, to improve the strength of the water meter and to prevent corrosion by 0.005ppm in the lead dissolution test The present invention relates to a water meter electroless nickel plating method for detecting the following.

일반적인 수도미터기(10)의 형태는 내부에 유체가 통과하는 유량을 측정하는 장치가 설치되며, 몸체(11)의 양쪽으로 형성한 연결부(13)에 앵글 밸브(17)가 연결되어 유체의 공급 유무를 결정할 수 있도록 하고 상측에는 유리에 의해 내부를 육안으로 확인할 수 있도록 하는 뚜껑(12)이 설치된 것으로 황동으로 성형하여 조립부위를 가공하여 사용하게 된다.In general, the type of water meter 10 has a device for measuring the flow rate of the fluid passing therein, the angle valve 17 is connected to the connection portion 13 formed on both sides of the body 11, the presence or absence of fluid supply To determine the and the upper side is installed with a lid 12 to be able to visually check the inside by the glass is molded in brass and used to process the assembly part.

그러나 이러한 수도미터기의 몸체는 납 용출 시험을 하는 경우 일반적으로 1ppm 이하로 유지되지만, 그 기준이 0.005ppm 이하로 강화되므로 황동으로만 성형한 수도미터기는 그 기준을 통과할 수 없는 불합격 제품으로 성형된다.However, the body of such water meter is generally kept below 1ppm in the lead dissolution test, but since the standard is strengthened to 0.005ppm or less, the water meter made of brass is molded into a product that cannot pass the standard. .

이러한 불합격 제품을 유통하는 경우 물이 공급되면서 납이 혼입되어 인체에 치명적인 오류를 제공하거나, 여러 가지 나쁜 영향을 미치게 된다.In the case of distribution of such a rejected product, lead is mixed with water to provide a fatal error to the human body or have various adverse effects.

아울러, 도금이란 소재의 표면에 금속을 코팅하는 과정을 말하며 일반적으로 부식을 방지하기 위해서나, 내마모성(스크레치에 대한 저항성)을 부여하거나, 고온에서 사용하는 금속을 보호하기 위해서나, 밀착성을 제공하기 위하여 또는 적절한 전기적 성질을 얻기 위하여, 혹은 소재에 반사성을 부여하고 외형을 좋게 하기 위하여 등등의 여러 가지 목적을 달성하기 위해 사용한다.In addition, plating refers to a process of coating a metal on the surface of the material, and generally to prevent corrosion, to impart wear resistance (resistance to scratches), to protect metals used at high temperatures, or to provide adhesion or It is used to achieve various purposes such as to obtain proper electrical properties, or to reflect the material and improve its appearance.

그러나 전기도금방법은 니켈 - 크롬 도금과 같이 니켈을 도금한 후 크롬을 도금하는 방법을 이용하고 있으나, 수도미터기의 경우에는 몸체의 외부로 노출된 부분만 도금이 이루어지고 내부에는 도금이 이루어지지 않기 때문에 외관은 미려하지만 실제 유체(수돗물)가 통과하는 부분은 내부이므로 통과하는 유체에 납 성분이 접촉되어 물을 오염시키는 원인이 되며 실제 납 용출시험을 하는 경우 1ppm 이하에서 0.1ppm 정도가 용출되므로 기준에 합격할 수 없는 것이었다.However, the electroplating method uses a method of plating chromium after plating nickel, such as nickel-chromium plating. However, in the case of a water meter, only the part exposed to the outside of the body is plated, and plating is not performed inside. Therefore, the exterior is beautiful, but the part where the actual fluid (tap water) passes through is inside, which leads to contamination of water by contacting the lead component with the passing fluid.In the case of the actual lead dissolution test, about 0.1 ppm is eluted at less than 1 ppm. I could not pass on.

이에 본 발명은 이와 같은 종래의 결점을 해소하기 위하여 안출된 것으로, 수도미터기를 욕조에 직접 넣어 무전해 니켈 도금에 의해 수도미터기의 몸체 전체면에 니켈 도금층을 피복하여 이루어지도록 함을 목적으로 한다.Accordingly, the present invention has been made in order to solve such a conventional drawback, and is intended to be made by coating a nickel plating layer on the entire surface of the body of the water meter by electroless nickel plating by putting the water meter directly into the bath.

본 발명은 니켈 도금층을 피복하여 이루어지는 무전해 니켈 도금방법을 통하여 납 용출시험에서 0.005ppm 이하가 되도록 함을 목적으로 한다.The present invention aims to be 0.005 ppm or less in the lead dissolution test through the electroless nickel plating method formed by coating a nickel plating layer.

이러한 목적으로 이루어지는 본 발명의 바람직한 실시예를 첨부시킨 도면에 따라서 상세하게 설명하기로 한다.According to the accompanying drawings, preferred embodiments of the present invention for this purpose will be described in detail.

수도미터기(10)는 내부에 공급하는 유체의 유량을 측정하는 측정장치가 설치되는 몸체(11)의 양측으로 연결부(13)가 형성되어 앵글밸브(17)와 연결되도록 하며 상측으로 유리에 의해 내부를 육안으로 확인할 수 있도록 하는 뚜껑(12)으로 이루 어진다.The water meter 10 has a connecting portion 13 formed at both sides of the body 11 on which the measuring device for measuring the flow rate of the fluid supplied therein is installed so that the water meter 10 is connected to the angle valve 17, and the glass is upwards by the glass. The lid 12 is made so that you can check with the naked eye.

상기 수도미터기(10)는 건축물의 실내, 외에 다양하게 설치하며, 보호통(15)에 설치하는 경우에는, 도 1에 도시한 바와 같이, 앵글밸브(17)에 파이프(18)가 연결되고 이 파이프(18)는 동파를 방지하기 위하여 다리(19)의 내부에 설치하는 한편, 수도미터기(10)와 앵글밸브(17)는 보호통(15)의 내부에서 보온재(16)로 감싸지도록 보관하는 것이다.The water meter 10 is installed in a variety of interior and exterior of the building, and when installed in the protective cylinder 15, as shown in Figure 1, the pipe 18 is connected to the angle valve 17, the pipe 18 is installed inside the leg 19 to prevent freezing, while the water meter 10 and the angle valve 17 is to be stored to be wrapped with the insulating material 16 in the interior of the protective container (15).

상기 수도미터기(10)는 황동으로 성형한 후 뚜껑(12)이 설치되는 부분과 내부 및 연결부(13)가 가공되어 사용하는 것으로 황동으로 성형한 수도미터기(10)의 몸체(11)를 납 용출시험하면 대략 1ppm 이하가 나온다.The water meter 10 is formed of brass, and then the part 11 is installed and the inner portion and the connecting portion 13 is processed to use the lead eluting the body 11 of the water meter 10 made of brass The test yields approximately 1 ppm or less.

이러한 수도미터기(10)의 몸체(11)를 무전해 니켈 도금하여 0.005ppm 이하의 납이 용출되도록 하는 것이다.The body 11 of the water meter 10 is electroless nickel plated so that lead of 0.005 ppm or less is eluted.

본 발명에 있어서, 통상적인 무전해 니켈 도금과정에서 수도미터기(10)의 몸체 전체면에 무전해 니켈 도금을 5∼9㎛두께로 하는 것이다.In the present invention, in the conventional electroless nickel plating process, the electroless nickel plating is made to have a thickness of 5 to 9 μm on the entire body surface of the water meter 10.

무전해 니켈의 온도는 83∼92℃ 정도가 적당하며, 도금시간은 35∼43분이 좋고, ph는 4.4∼4.9가 되도록 한다.The temperature of the electroless nickel is suitably about 83 to 92 占 폚, the plating time is preferably 35 to 43 minutes, and the pH is 4.4 to 4.9.

이와 같이 무전해 니켈을 도금함에 있어서, 7㎛의 두께로 도금하는 경우, 수도미터기(10)의 몸체(11) 전체면에 균일하게 도금이 이루어짐을 확인할 수 있으며, 납 용출시험을 한 결과 0.0041ppm이 검출됨을 확인하였다.As described above, in plating electroless nickel, when plating with a thickness of 7 μm, the plating was uniformly performed on the entire surface of the body 11 of the water meter 10. As a result of the lead dissolution test, 0.0041 ppm It was confirmed that this was detected.

이하에서, 본 발명의 바람직한 실시예를 상세하게 설명하기로 한다.Hereinafter, preferred embodiments of the present invention will be described in detail.

[실시예]EXAMPLE

(1) 주물 성형(1) casting molding

몸체(11)의 개략적인 형태를 갖도록 제조된 틀에 용융된 황동을 공급하여 수도미터기(10)를 성형한다.The water meter 10 is formed by supplying molten brass to a mold manufactured to have a schematic shape of the body 11.

(2) 주물 가공(2) casting processing

주물로 성형한 후 뚜껑(12)과 그 내부 및 연결부(13)를 가공하여 수도미터기(10)의 외형을 성형한다.After molding into a casting, the lid 12, the inside and the connecting portion 13 is processed to shape the external shape of the water meter 10.

(3) 탈지 및 수세(3) degreasing and washing

알카리에 25∼35분간 침적시켜 탈지한 후 수세 한다.Dip it in alkaline for 25 to 35 minutes to degrease and wash with water.

(4) 산세 및 수제(4) pickling and handmade

45∼55%의 질산 수용액에 10∼15분간 산세한 후 수세 한다.After pickling in 45-55% nitric acid aqueous solution for 10-15 minutes, it is washed with water.

(5) 전해탈지 및 수세(5) Electrolytic degreasing and washing

음극 전해탈지를 10∼20분간 수행한 후 수세 한다.After performing electrolytic degreasing for 10-20 minutes, it is washed with water.

(6) 산세 및 수세(6) Pickling and washing

8∼12%의 황산 수용액에 산세한 후 수세 한다.After washing with 8-12% sulfuric acid aqueous solution, it is washed with water.

(7) 무전해 니켈 및 수세(7) electroless nickel and flush

욕조의 온도를 83∼92℃ 정도가 되도록 하여 수도미터기(10)를 욕조에 담가서 ph는 4.4∼4.9가 되도록 하고 35∼43분간 도금하여 5∼9㎛두께가 되도록 한 후 수세 한다.The temperature of the bath is 83-92 ° C., the water meter 10 is immersed in the bath so that the pH is 4.4-4.9, plating for 35-43 minutes, the thickness is 5-9 μm, and washed with water.

(8) 중화 및 수세(8) neutralization and washing

8∼12%의 시안화나트륨 수용액에 넣어 중화한 후 수세 한다.It is neutralized after putting into 8-12% of sodium cyanide aqueous solution and washing with water.

(9) 중크롬산 및 수세(9) Dichromic acid and water washing

5∼10%의 크롬산 수용액에 5∼10분간 침지 한 후 수세와 온탕을 수행 한다.After immersing in 5-10% aqueous solution of chromic acid for 5-10 minutes, washing with water and hot water is performed.

(10) 건조과정(10) drying process

에어를 공급하여 수도미터기(10)를 건조한 후 건조로에 넣어 10∼15분간 건조한다.After supplying air to dry the water meter (10) in a drying furnace for 10 to 15 minutes.

(11) 완성(11) completion

외관검사 후 포장하여 완성한다. After packaging, complete packaging.

이와 같은 도금 방법에 대하여 표1에서 일실시예를 더욱 명확하게 밝히기로 한다.With respect to such a plating method, one embodiment will be more clearly shown in Table 1.

[표 1]TABLE 1

작업 순서sequence of the work 작업 공정Work process 용 액Solution 작업 조건Working condition 참고 사항Note 1One 제품 공급product supply 22 침적 탈지Degreasing Degreasing 알칼리 탈지액Alkaline degreasing liquid 온도 : 30∼60℃ 시간 : 30분Temperature: 30 ~ 60 ℃ Time: 30 minutes 33 2단 수세Two steps 공업용수Industrial water 온도 : 상온 시간 : 1분Temperature: Room temperature time: 1 minute 이물질 부착이 없을 것No foreign substance adhered 44 산 세Pickling 질산 50%Nitric Acid 50% 온도 : 30∼60℃ 시간 : 10∼15분Temperature: 30 ~ 60 ℃ Time: 10 ~ 15 minutes 55 2단 수세Two steps 공업용수Industrial water 온도 : 상온 시간 : 1분Temperature: Room temperature time: 1 minute 이물질 부착이 없을 것No foreign substance adhered 66 전해 탈지Electrolytic degreasing 음극 전해탈지Cathodic Electrolytic Degreasing 온도 : 30∼60℃ 시간 : 10∼20분Temperature: 30 ~ 60 ℃ Time: 10 ~ 20 minutes 77 2단 수세Two steps 공업용수Industrial water 온도 : 상온 시간 : 1분Temperature: Room temperature time: 1 minute 88 산 세Pickling 황산 10%Sulfuric acid 10% 온도 : 30∼60℃ 시간 : 10분Temperature: 30 ~ 60 ℃ Time: 10 minutes 99 2단 수세Two steps 공업용수Industrial water 온도 : 상온 시간 : 1분Temperature: Room temperature time: 1 minute 1010 니켈 도금Nickel plating 무전해 니켈 도금액Electroless Nickel Plating Solution 온도 : 85∼90℃ 시간 : 40분 PH : 4.5∼4.8Temperature: 85 ~ 90 ℃ Time: 40 minutes PH: 4.5 ~ 4.8 두께 : 7㎛Thickness: 7㎛

1111 2단 수세Two steps 공업용수Industrial water 온도 : 상온 시간 : 1분Temperature: Room temperature time: 1 minute 1212 중 화Chinese 시안화나트륨 10%10% sodium cyanide 온도 : 상온 시간 : 2분Temperature: Room temperature time: 2 minutes 1313 2단 수세Two steps 공업용수Industrial water 온도 : 상온 시간 : 1분Temperature: Room temperature time: 1 minute 1414 중크롬산Dichromic acid 크롬산 5∼10%5-10% of chromic acid 온도 : 상온 시간 : 5∼10분Temperature: Room temperature time: 5 ~ 10 minutes 1515 3단 수세3-stage washing 공업용수Industrial water 온도 : 상온 시간 : 2분Temperature: Room temperature time: 2 minutes 1616 온 탕Hot water bath 온도 : 60∼70℃ 시간 : 2분Temperature: 60 ~ 70 ℃ Time: 2 minutes 1717 건 조dry 에어 및 건조로Air and drying furnace 온도 : 60∼70℃ 시간 : 15분Temperature: 60 ~ 70 ℃ Time: 15 minutes 이물질 부착이 없을 것No foreign substance adhered 1818 검 사Inspection 두께 측정Thickness measurement

본 발명은 수도미터기를 욕조에 직접 넣어 무전해 니켈 도금에 의해 수도미터기의 몸체 전체면에 니켈 도금층을 피복하여 수도미터기로의 사용시에 공급하는 물이 유해물질에 노출되어 오염되지 않도록 하는 것이다.The present invention is to put the water meter directly into the bath to coat the nickel plating layer on the entire surface of the body of the water meter by electroless nickel plating so that the water supplied during use to the water meter is exposed to harmful substances and not contaminated.

본 발명은 니켈 도금층을 피복하여 이루어지는 무전해 니켈 도금방법을 통하여 납 용출시험에서 0.005ppm 이하가 되도록 하여 안전성을 보장할 수 있도록 하는 것이다.The present invention is to ensure the safety to be less than 0.005ppm in the lead dissolution test through the electroless nickel plating method is formed by coating the nickel plating layer.

Claims (3)

삭제delete 양측으로 연결부(13)를 형성하고 상측에 뚜껑(12)이 설치되며 내부에 수량을 측정하는 몸체(11)로 이루어진 수도미터기(10)를 가공하여 알칼리 탈지액에 30분 침적하여 탈지한 후 2단 수세 하는 단계;After forming the connecting portion 13 on both sides and the lid 12 is installed on the upper side, the water meter 10 consisting of the body 11 for measuring the amount of water is processed by dipping in alkaline degreasing liquid for 30 minutes to degrease 2 Washing with water only; 질산 50%를 혼합하여 10∼15분간 산세한 후 2단 수세 하는 단계; Mixing 50% nitric acid and pickling for 10 to 15 minutes, followed by washing in two stages; 10∼20분간 전해 탈지한 후 2단 수세하고 황산 10%에 10분 침지하여 산세 후 2단 수세하는 단계;10-20 minutes of electrolytic degreasing followed by two stages of washing with water and immersing in 10% sulfuric acid for 10 minutes, followed by two stages of washing with acid; 무전해 니켈 도금액을 85∼90℃의 온도에서 35∼40분간 니켈 도금한 후 2단 수세 하는 단계;Performing nickel plating on the electroless nickel plating solution at a temperature of 85 to 90 ° C. for 35 to 40 minutes, followed by two steps of washing with water; 시아나나트륨 10%에 2분간 중화한 후 2단 수세하는 단계;Neutralizing for 10 minutes in 10% of cyanate sodium and then washing with two stages of water; 크롬산 5∼10%에 5∼10분간 침지하여 3단 수세하는 단계;Immersing in 5-10% of chromic acid for 5-10 minutes and washing with three steps of water; 60∼70℃의 온탕에 2분간 침지한 후 에어 및 건조로에서 15분간 건조하는 단계를 포함하여 이루어진 수도미터기 무전해 니켈 도금방법에 있어서,In the water meter electroless nickel plating method comprising the step of immersing in a hot water of 60 ~ 70 ℃ for 2 minutes and then drying in air and drying furnace for 15 minutes, 상기 무전해 니켈 도금 단계에서는 니켈 도금액을 85∼90℃의 온도에서 ph가 4.5∼4.8이 되게 하고, 35∼40분간 도금하여 5∼7㎛의 두께로 니켈 도금하는 것을 특징으로 하는 수도미터기 무전해 니켈 도금방법.In the electroless nickel plating step, the nickel plating solution is made to have a pH of 4.5 to 4.8 at a temperature of 85 to 90 ° C., and is then plated for 35 to 40 minutes and nickel plated to a thickness of 5 to 7 μm. Nickel plating method. 양측으로 연결부(13)를 형성하고 상측에 뚜껑(12)이 설치되며 내부에 수량을 측정하는 몸체(11)로 이루어진 수도미터기(10)를 가공하여 알칼리 탈지액에 30분 침적하여 탈지한 후 2단 수세 하는 단계;After forming the connecting portion 13 on both sides and the lid 12 is installed on the upper side, the water meter 10 consisting of the body 11 for measuring the amount of water is processed by dipping in alkaline degreasing liquid for 30 minutes to degrease 2 Washing with water only; 질산 50%를 혼합하여 10∼15분간 산세한 후 2단 수세 하는 단계; Mixing 50% nitric acid and pickling for 10 to 15 minutes, followed by washing in two stages; 10∼20분간 전해 탈지한 후 2단 수세하고 황산 10%에 10분 침지하여 산세 후 2단 수세하는 단계;10-20 minutes of electrolytic degreasing followed by two stages of washing with water and immersing in 10% sulfuric acid for 10 minutes, followed by two stages of washing with acid; 무전해 니켈 도금액을 85∼90℃의 온도에서 35∼40분간 니켈 도금한 후 2단 수세 하는 단계;Performing nickel plating on the electroless nickel plating solution at a temperature of 85 to 90 ° C. for 35 to 40 minutes, followed by two steps of washing with water; 시아나나트륨 10%에 2분간 중화한 후 2단 수세하는 단계;Neutralizing for 10 minutes in 10% of cyanate sodium and then washing with two stages of water; 크롬산 5∼10%에 5∼10분간 침지하여 3단 수세하는 단계;Immersing in 5-10% of chromic acid for 5-10 minutes and washing with three steps of water; 60∼70℃의 온탕에 2분간 침지한 후 에어 및 건조로에서 15분간 건조하는 단계를 포함하여 이루어진 수도미터기 무전해 니켈 도금방법에 있어서,In the water meter electroless nickel plating method comprising the step of immersing in a hot water of 60 ~ 70 ℃ for 2 minutes and then drying in air and drying furnace for 15 minutes, 상기 수도미터기(10)는 0.005ppm 이하의 납이 용출되도록 5∼7㎛의 두께로 무전해 니켈 도금함을 특징으로 하는 수도미터기 무전해 니켈 도금방법.The water meter 10 is electroless nickel plating method characterized in that the electroless nickel plating to a thickness of 5 ~ 7㎛ so that lead of less than 0.005ppm.
KR1020070023525A 2007-03-09 2007-03-09 Electroless nikel plating method of a water metel KR100837607B1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5625958A (en) 1979-08-10 1981-03-12 Mitsubishi Metal Corp Electroless nickel plating method for high nickel chromium alloy
JPH02141580A (en) * 1988-11-22 1990-05-30 Hitachi Chem Co Ltd Method for evaluating active state of electroless nickel plating liquid
JPH05129376A (en) * 1991-11-07 1993-05-25 Sumitomo Metal Mining Co Ltd Method of applying electroless nickel planting to surface of copper film formed on surface of insulator
KR940009362A (en) * 1992-10-27 1994-05-20 황선두 Electroless Nickel Plating Method for Iron Free Cutting Steels
KR950006114A (en) * 1993-08-07 1995-03-20 배순훈 Surface treatment method of brake drum for clutch of washing machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5625958A (en) 1979-08-10 1981-03-12 Mitsubishi Metal Corp Electroless nickel plating method for high nickel chromium alloy
JPH02141580A (en) * 1988-11-22 1990-05-30 Hitachi Chem Co Ltd Method for evaluating active state of electroless nickel plating liquid
JPH05129376A (en) * 1991-11-07 1993-05-25 Sumitomo Metal Mining Co Ltd Method of applying electroless nickel planting to surface of copper film formed on surface of insulator
KR940009362A (en) * 1992-10-27 1994-05-20 황선두 Electroless Nickel Plating Method for Iron Free Cutting Steels
KR950006114A (en) * 1993-08-07 1995-03-20 배순훈 Surface treatment method of brake drum for clutch of washing machine

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