JPH05125584A - Surface treatment for faucet fittings and built-in parts thereof - Google Patents
Surface treatment for faucet fittings and built-in parts thereofInfo
- Publication number
- JPH05125584A JPH05125584A JP29346891A JP29346891A JPH05125584A JP H05125584 A JPH05125584 A JP H05125584A JP 29346891 A JP29346891 A JP 29346891A JP 29346891 A JP29346891 A JP 29346891A JP H05125584 A JPH05125584 A JP H05125584A
- Authority
- JP
- Japan
- Prior art keywords
- plating layer
- corrosion
- copper
- alloy plating
- built
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004381 surface treatment Methods 0.000 title claims description 6
- 238000007747 plating Methods 0.000 claims abstract description 53
- 229910020938 Sn-Ni Inorganic materials 0.000 claims abstract description 23
- 229910008937 Sn—Ni Inorganic materials 0.000 claims abstract description 23
- 239000000956 alloy Substances 0.000 claims abstract description 23
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 18
- 229910000881 Cu alloy Inorganic materials 0.000 claims abstract description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000010949 copper Substances 0.000 claims abstract description 15
- 229910052802 copper Inorganic materials 0.000 claims abstract description 14
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000004744 fabric Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000005260 corrosion Methods 0.000 abstract description 31
- 230000007797 corrosion Effects 0.000 abstract description 31
- 230000007547 defect Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 20
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 9
- 239000000203 mixture Substances 0.000 description 5
- 229910000990 Ni alloy Inorganic materials 0.000 description 4
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- TXUICONDJPYNPY-UHFFFAOYSA-N (1,10,13-trimethyl-3-oxo-4,5,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-17-yl) heptanoate Chemical compound C1CC2CC(=O)C=C(C)C2(C)C2C1C1CCC(OC(=O)CCCCCC)C1(C)CC2 TXUICONDJPYNPY-UHFFFAOYSA-N 0.000 description 1
- JHWIEAWILPSRMU-UHFFFAOYSA-N 2-methyl-3-pyrimidin-4-ylpropanoic acid Chemical compound OC(=O)C(C)CC1=CC=NC=N1 JHWIEAWILPSRMU-UHFFFAOYSA-N 0.000 description 1
- 229910021591 Copper(I) chloride Inorganic materials 0.000 description 1
- 239000004471 Glycine Substances 0.000 description 1
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 description 1
- 241001311547 Patina Species 0.000 description 1
- 229910021626 Tin(II) chloride Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- OXBLHERUFWYNTN-UHFFFAOYSA-M copper(I) chloride Chemical compound [Cu]Cl OXBLHERUFWYNTN-UHFFFAOYSA-M 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000009760 functional impairment Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000001119 stannous chloride Substances 0.000 description 1
- 235000011150 stannous chloride Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- RYCLIXPGLDDLTM-UHFFFAOYSA-J tetrapotassium;phosphonato phosphate Chemical compound [K+].[K+].[K+].[K+].[O-]P([O-])(=O)OP([O-])([O-])=O RYCLIXPGLDDLTM-UHFFFAOYSA-J 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Landscapes
- Domestic Plumbing Installations (AREA)
- Electroplating Methods And Accessories (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、各種の水栓具において
内部流路に臨む表面の腐食を効果的に防げるようにした
表面処理方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface treatment method capable of effectively preventing the corrosion of the surface of the water faucet facing the internal flow path.
【０００２】[0002]
【従来の技術】単水栓や湯水混合栓等の各種の水栓具
は、金具製品としたものが一般的であり、その本体は主
に銅や銅合金又はステンレス材が従来から広く利用され
ている。これらの素材の中で、ステンレス材は銅や銅合
金に比べると、加工性に劣るほか価格的にも高いので、
素材としては銅や銅合金が好ましいとされている。2. Description of the Related Art Various types of faucets such as single faucets and hot and cold taps are generally made into metal fittings, and the main body of the faucets has generally been copper, copper alloy or stainless steel. ing. Among these materials, stainless steel is inferior in workability and expensive in price compared to copper and copper alloys,
Copper or copper alloy is said to be preferable as a material.
【０００３】ステンレス材では腐食防止のための処理は
さほど重要ではないが、銅や銅合金の場合では、耐食性
を向上させるためにめっきを施すことが必要である。た
とえば、銅または銅合金の場合では、ＮｉやＣｒ等によ
るめっき処理が行われる。The treatment for preventing corrosion is not so important for stainless steels, but in the case of copper and copper alloys, it is necessary to perform plating in order to improve the corrosion resistance. For example, in the case of copper or copper alloy, plating treatment with Ni, Cr or the like is performed.
【０００４】[0004]
【発明が解決しようとする課題】単水栓や湯水混合栓等
はその据付け条件によって様々な水質の水や湯に内部流
路が曝される。たとえば、上水よりも腐食性が遙に高い
中水等の水質条件の場合であれば、銅や銅合金は腐食を
生じやすい。このため、内部の弁等を移動させるための
部材が水栓具の本体の内壁に沿って摺動するような構造
の場合では、本体側の摺動面の腐食によって摺動抵抗が
増大し、機能障害を招くことになる。SUMMARY OF THE INVENTION In a single faucet, a hot and cold water mixing tap, etc., the internal flow path is exposed to water and hot water of various water qualities depending on the installation conditions. For example, in the case of water quality conditions such as medium water, which is much more corrosive than tap water, copper and copper alloys are prone to corrosion. Therefore, in the case of a structure in which the member for moving the internal valve or the like slides along the inner wall of the main body of the faucet, the sliding resistance increases due to corrosion of the sliding surface on the main body side, This will cause functional impairment.
【０００５】また、銅や銅合金を素材としたときにその
生地にＮｉめっきを施す場合では、このＮｉめっきの層
が薄ければ、十分な耐食性は得られない。これに対し、
めっき層を厚くして耐食性を上げることはできるが、水
栓の内部で動く部材とこれを摺動面で受ける本体との壁
との間の寸法公差を超えかねない。このため、めっき層
を厚くする場合では、摺動部材が動き難くなる等の機能
上の問題を生じてしまう。Further, when copper or a copper alloy is used as a raw material and Ni plating is applied to the base material, if the Ni plating layer is thin, sufficient corrosion resistance cannot be obtained. In contrast,
Although it is possible to increase the corrosion resistance by thickening the plating layer, the dimensional tolerance between the wall of the member that moves inside the faucet and the body that receives it on the sliding surface may be exceeded. Therefore, when the plating layer is thickened, functional problems such as difficulty in moving the sliding member occur.
【０００６】更に、銅や銅合金の生地にＣｒめっき或い
は生地上に他のめっきを施してその上にＣｒめっきを施
した場合では、高電流密度部分にクラックが発生しやす
い。このため、中水等の腐食性の高い水質条件下では、
クラック部分から生地または下地のめっきの腐食が進行
していくことになり、耐食性の面で十分でない。Further, when a copper or copper alloy material is Cr-plated or another material is plated on the material and then Cr-plated, cracks are likely to occur in the high current density portion. For this reason, under highly corrosive water quality conditions such as medium water,
Corrosion of the plating of the material or the base proceeds from the crack portion, which is not sufficient in terms of corrosion resistance.
【０００７】このように、銅や銅合金を素材としたと
き、ＮｉやＣｒめっきでは、十分な耐食性が得られると
は限らず、また摺動部品のようにその表面が摩耗しやす
い部材について腐食を防ぐためのめっき層を厚くするよ
うな処理をすれば、機能障害を招くという問題がある。As described above, when copper or a copper alloy is used as the material, Ni or Cr plating does not always provide sufficient corrosion resistance, and the surface of a member such as a sliding component whose surface is easily worn is corroded. If a treatment is performed to thicken the plating layer for preventing the above, there is a problem that functional failure is caused.
【０００８】本発明において解決すべき課題は、水栓金
具及びその内蔵部品の腐食を比較的薄くかつ均一な厚み
のめっき層で防げるようにし、特に摺動部材の摩耗や腐
食を抑えて機能障害の発生もないようにすることにあ
る。The problem to be solved in the present invention is to prevent corrosion of the water faucet metal fitting and its built-in parts by a relatively thin and uniform thickness plating layer, and especially to suppress wear and corrosion of the sliding member to cause a functional failure. To prevent the occurrence of.
【０００９】[0009]
【課題を解決するための手段】本発明は、銅または銅合
金を素材とする水栓具の本体及びその内蔵部品に対し
て、素材生地の表面に０．５〜２ミクロンの厚さのＳｎ
−Ｎｉ合金めっき層を施し、このＳｎ−Ｎｉ合金めっき
層の表面に電解クロメート被膜を形成することを特徴と
する。DISCLOSURE OF THE INVENTION According to the present invention, with respect to a main body of a faucet made of copper or a copper alloy and its built-in parts, Sn having a thickness of 0.5 to 2 μm is formed on the surface of the material cloth.
-Ni alloy plating layer is applied, and an electrolytic chromate film is formed on the surface of this Sn-Ni alloy plating layer.
【００１０】更に、本発明においては、上記のように素
材生地上にＳｎ−Ｎｉ合金めっき層を施すのみではな
く、素材表面が粗かったりピンホールがある恐れのある
場合は、素材上にまずＮｉめっきを施し、素材表面を平
滑化し且つ耐久性を持たせることもできる。Further, in the present invention, not only the Sn-Ni alloy plating layer is formed on the material cloth as described above, but when there is a possibility that the material surface is rough or there is a pinhole, the material material is first applied. Ni plating may be applied to smooth the surface of the material and provide durability.
【００１１】[0011]
【作用】従来から広く知られているＮｉめっきを施して
から無水クロム酸，クロム酸塩または重クロム酸塩を含
む水溶液中で陰極電解処理を施したＮｉめっき層とクロ
メート被膜では、Ｎｉめっき層からピンホールを完全に
消滅させることは不可能である。これに対して、Ｓｎ−
Ｎｉ合金めっきでは、めっき皮膜がＳｎ−Ｎｉの微細な
結晶粒から成り、ピンホールが少なくまた不動態化皮膜
を作りやすいため、生地の腐食を抑えることができる。
更に、Ｓｎ−Ｎｉ合金めっきは、Ｃｒめっき等に比べる
とクラックが発生し難く、めっき層の厚みが比較的均一
にできるという特性を備えている。[Function] The Ni plating layer and the chromate coating, which have been widely known in the past, are subjected to cathodic electrolysis in an aqueous solution containing chromic anhydride, chromate or dichromate It is impossible to completely eliminate the pinhole from. On the other hand, Sn-
In Ni alloy plating, the plating film is made of fine Sn—Ni crystal grains, has few pinholes, and is easy to form a passivation film, so that corrosion of the base material can be suppressed.
Further, Sn-Ni alloy plating has characteristics that cracks are less likely to occur as compared with Cr plating or the like, and the thickness of the plating layer can be made relatively uniform.
【００１２】このようなＳｎ−Ｎｉ合金めっき層の表面
に対して電解クロメート被膜を施すと、Ｓｎ−ＮｉとＣ
ｒとの薄い化合物がめっき表面に形成されるため、耐食
性の向上が図られる。When an electrolytic chromate coating is applied to the surface of such a Sn-Ni alloy plating layer, Sn-Ni and C
Since a thin compound with r is formed on the plating surface, the corrosion resistance is improved.
【００１３】図１は表面処理後の表面の組成を示す説明
図であり、銅または銅合金の生地１の表面にＳｎ−Ｎｉ
合金めっき層２が形成され、更にその表面にクロメート
被膜３を形成している。Ｓｎ−Ｎｉ合金めっき層２の厚
さは、０．５〜２ミクロンであり、好ましくは１〜１．
５ミクロンである。なお、この組成のほかに、生地１の
表面に厚さが２〜５ミクロン程度のＮｉめっき層を形成
するようにし、このＮｉめっき層の上にＳｎ−Ｎｉ合金
めっき層２及びクロメート被膜３をそれぞれ形成するよ
うにしてもよい。FIG. 1 is an explanatory diagram showing the composition of the surface after the surface treatment. Sn-Ni is formed on the surface of the copper or copper alloy cloth 1.
The alloy plating layer 2 is formed, and the chromate film 3 is further formed on the surface thereof. The thickness of the Sn—Ni alloy plating layer 2 is 0.5 to 2 μm, preferably 1 to 1.
It is 5 microns. In addition to this composition, a Ni plating layer having a thickness of about 2 to 5 μm is formed on the surface of the cloth 1, and the Sn—Ni alloy plating layer 2 and the chromate film 3 are formed on the Ni plating layer. You may make it each form.
【００１４】このような組成に対し、Ｓｎ−Ｎｉ合金め
っき層２の厚さが０．５ミクロンよりも薄いと、摺動面
の摩耗によって生地が露出し、腐食の原因となる。ま
た、Ｓｎ−Ｎｉ合金めっき層２の厚さが２ミクロンより
も大きいと、めっき薬液の消費量が増えるため経済的で
なく同時に部品の寸法公差に適合し得なくなる。If the thickness of the Sn—Ni alloy plating layer 2 is thinner than 0.5 μm with respect to such a composition, the cloth is exposed due to the abrasion of the sliding surface, which causes corrosion. Further, if the thickness of the Sn—Ni alloy plating layer 2 is larger than 2 μm, the consumption of the plating chemical increases, which is not economical and at the same time cannot meet the dimensional tolerance of the parts.
【００１５】[0015]
【実施例】本発明の方法を図２に示す湯水混合栓の部品
のめっきに適用した例について説明する。EXAMPLE An example in which the method of the present invention is applied to the plating of the parts of the hot and cold water mixing tap shown in FIG. 2 will be described.
【００１６】図において、湯水混合栓の本体１０は銅合
金を素材として形成したものであり、自動温度調整機能
のための部品を摺動部材として組み込んでいる。自動温
度調整機能は、ハンドル１１によって温度設定可能とし
たもので、水側と湯側の流路に連通した弁体１２，この
弁体１２を温度変化に応じて軸線方向に移動させる感温
体１３ａを備えた駆動筒１３，この駆動筒１３を保持す
ると共に軸線方向に移動可能として弁体１２側を向く面
を水側の弁座とした保持筒１４及び弁体１２を受ける湯
側の弁座環１５を主な部材として備えている。そして、
これらの弁体１２，保持筒１４及び弁座環１５は本体１
０の内周壁を摺動面としてそれぞれの軸線方向に移動可
能に組み込まれ、駆動筒１３は保持筒１４の内周壁に同
様に摺動可能に収納されている。In the figure, the body 10 of the hot and cold water mixing valve is made of a copper alloy, and a component for an automatic temperature control function is incorporated as a sliding member. The automatic temperature adjustment function enables temperature setting by the handle 11, and the valve body 12 communicating with the water-side and hot-water side flow passages, and the temperature sensing body that moves the valve body 12 in the axial direction according to the temperature change. A drive cylinder 13 provided with 13a, a holding cylinder 14 that holds the drive cylinder 13 and is movable in the axial direction and has a surface facing the valve body 12 side as a water side valve seat, and a hot water side valve that receives the valve body 12 The seat ring 15 is provided as a main member. And
The valve body 12, the holding cylinder 14, and the valve seat ring 15 are the main body 1
No. 0 inner peripheral wall is used as a sliding surface so as to be movable in each axial direction, and the drive cylinder 13 is also slidably housed in the inner peripheral wall of the holding cylinder 14.
【００１７】これらの弁体１２やその他の摺動部材はい
ずれも銅または銅合金を素材とし、次の要領によってめ
っき処理を施した。Each of the valve body 12 and other sliding members was made of copper or copper alloy, and was plated by the following procedure.
【００１８】（１）ＮａＯＨ等の水溶液中に部材を１０
分間浸漬してアルカリ洗浄を行い、生地表面の油や汚れ
を除去する。(1) 10 parts of the member in an aqueous solution of NaOH or the like
Soak for a minute and perform alkali cleaning to remove oil and dirt on the surface of the dough.
【００１９】（２）めっきの密着性を向上させるため、
アルカリ洗浄の後、Ｈ2 ＳＯ4 溶液中で３０秒間酸洗浄
して生地表面を活性化させる。(2) In order to improve the adhesion of plating,
After the alkaline washing, the dough surface is activated by acid washing in a H 2 SO 4 solution for 30 seconds.
【００２０】（３）以下の条件で生地表面にＳｎ−Ｎｉ
の合金めっき層を形成した。なお、処理時間を適切にす
ることによって、Ｓｎ−Ｎｉ合金めっき層の厚さが０．
５〜２ミクロンのものが得られた。(3) Sn-Ni is applied to the surface of the fabric under the following conditions.
The alloy plating layer of was formed. The thickness of the Sn-Ni alloy plating layer can be reduced to 0.
A 5-2 micron product was obtained.
【００２１】浴組成： Ｋ4 Ｐ2 Ｏ7 ・３Ｈ2 Ｏ（２リン酸カリウム）：２７５
グラム／リットル ＳｎＣｌ2 ・２Ｈ2 Ｏ（塩化第一錫） ： ２０
グラム／リットル ＮｉＣｌ2 ・６Ｈ2 Ｏ（塩化ニッケル） ： ３３
グラム／リットル グリシン ： ２０
グラム／リットル 浴温：摂氏５０度 電流密度：０．３Ａ／ｄｍ2 処理時間：６〜２４分 （４）以下の条件で電解クロメート処理を行いＳｎ−Ｎ
ｉ合金めっき層の表面に厚さが約５００オングストロー
ムのクロメート被膜を形成した。Bath composition: K 4 P 2 O 7 / 3H 2 O (potassium diphosphate): 275
Gram / liter SnCl 2 · 2H 2 O (stannous chloride): 20
Grams / liter NiCl 2 · 6H 2 O (nickel chloride): 33
Gram / liter Glycine: 20
Gram / liter Bath temperature: 50 degrees Celsius Current density: 0.3 A / dm 2 Treatment time: 6-24 minutes (4) Electrolytic chromate treatment is performed under the following conditions Sn-N
A chromate film having a thickness of about 500 Å was formed on the surface of the i alloy plating layer.
【００２２】浴組成：Ｎａ2 Ｃｒ2 Ｏ7 （重クロム酸ナ
トリウム）：３０グラム／リットルＣｒＯ3 （無水クロ
ム酸）：０．６グラム／リットル 浴温：摂氏２０〜２５度 電流密度：０．３Ａ／ｄｍ2 ｐＨ：２〜３ このようにしてめっき処理を施した製品に対して、ＩＳ
Ｏ（６５０９−１９８１）に基づく脱亜鉛腐食試験を実
施して、腐食についての試験評価を行った。なお、腐食
試験は、図２における弁体１２をテストピースとし、１
２．８グラムのＣｕＣｌ2 ・２Ｈ2 Ｏを蒸留水に加えて
全体を１リットルにし、液温を摂氏７５±３度に維持し
てテストピースを２４±０．２５時間浸漬するという条
件で行った。Bath composition: Na 2 Cr 2 O 7 (sodium dichromate): 30 g / l CrO 3 (chromic anhydride): 0.6 g / l Bath temperature: 20 to 25 ° C. Current density: 0. 3A / dm 2 pH: 2 to 3 IS against the product plated in this way
A dezincification corrosion test based on O (6509-1981) was performed to perform a test evaluation for corrosion. In the corrosion test, the valve body 12 in FIG.
2.8 grams of CuCl 2 .2H 2 O was added to distilled water to bring the total volume to 1 liter, and the test piece was immersed for 24 ± 0.25 hours while maintaining the liquid temperature at 75 ± 3 degrees Celsius. It was
【００２３】この試験による結果では、弁体１２にＳｎ
−Ｎｉ合金めっきを施さない場合、弁体１２が保持筒１
４と接触する部分（水用の弁座に相当する）の腐食の進
行が速く、全体的に緑青が生じた。また、Ｓｎ−Ｎｉ合
金めっきの厚さが０．２５ミクロンのものでは、非めっ
きの場合の腐食部分すなわち保持筒１４と接触する部分
のみが腐食し、生地まで腐食が到達していた。これに対
し、Ｓｎ−Ｎｉ合金めっき層の厚さが０．５０，０．７
５，１．００，１．２５ミクロンの４種については、い
ずれも腐食が認められなかった。The result of this test shows that the valve body 12 is Sn.
When the Ni alloy plating is not applied, the valve body 12 is the holding cylinder 1.
Corrosion progressed rapidly in the portion in contact with No. 4 (corresponding to the valve seat for water), and patina was produced overall. Further, in the case where the thickness of the Sn-Ni alloy plating is 0.25 micron, only the corroded portion in the case of non-plating, that is, the portion in contact with the holding cylinder 14 corroded, and the corrosion reached the cloth. On the other hand, the thickness of the Sn-Ni alloy plating layer is 0.50,0.7.
No corrosion was observed in any of the four types of 5, 1.00 and 1.25 microns.
【００２４】また、テストピースのビッカース表面硬度
試験では、Ｎｉめっきのみの場合では４５６Ｈｖである
のに対して、Ｓｎ−Ｎｉ合金めっきを施したものでは６
１５Ｈｖにまで向上したことが確認された。Also, in the Vickers surface hardness test of the test piece, it was 456 Hv in the case of only Ni plating, whereas it was 6 in the case of Sn-Ni alloy plating.
It was confirmed that it was improved to 15 Hv.
【００２５】以上のように、生地表面にＳｎ−Ｎｉ合金
めっき層を０．５ミクロンよりも大きな厚さとなるよう
にめっき処理しておき、その表面にクロメート被膜を施
せば、腐食の発生を抑えることができる。そして、Ｓｎ
−Ｎｉ合金めっき層の厚さの上限を２ミクロン程度とす
れば、水栓金具の部品としての寸法公差を超えない範囲
に維持できる。したがって、図２で示した摺動部品に対
して、腐食がなくしかもその摺動にも支障のない水栓具
用の部品を得ることができる。また、表面硬度も向上す
ることから、摺動面の摩耗も抑えられ、腐食の発生が更
に効果的に防止される。As described above, the Sn-Ni alloy plating layer is plated on the surface of the material so as to have a thickness larger than 0.5 μm, and the surface is coated with a chromate film to suppress the occurrence of corrosion. be able to. And Sn
-If the upper limit of the thickness of the Ni alloy plating layer is set to about 2 microns, it can be maintained within a range that does not exceed the dimensional tolerance as a component of the faucet metal fitting. Therefore, it is possible to obtain a component for a water faucet which is free from corrosion as compared with the sliding component shown in FIG. Further, since the surface hardness is also improved, the abrasion of the sliding surface can be suppressed and the occurrence of corrosion can be prevented more effectively.
【００２６】[0026]
【発明の効果】本発明の表面処理方法によれば、銅また
は銅合金の生地表面の腐食を比較的に薄いめっき層によ
って防止することができる。このため、水栓具の中に内
蔵する摺動部材に施すめっき層の厚さも薄くなり、その
寸法精度も高く維持できる。したがって、部材の腐食の
防止だけでなく、摺動面の摩耗による腐食や摺動不良を
生じることもなくなり、内蔵部材のそれぞれの機能にも
障害を与えることがなくなる。According to the surface treatment method of the present invention, the corrosion of the copper or copper alloy substrate surface can be prevented by the relatively thin plating layer. Therefore, the thickness of the plating layer applied to the sliding member incorporated in the water faucet becomes thin, and the dimensional accuracy can be maintained high. Therefore, not only the corrosion of the members is prevented, but also the corrosion and the sliding failure due to the abrasion of the sliding surface are not caused, and the respective functions of the built-in members are not impaired.
【図１】本発明の表面処理方法によって形成した生地表
面の断面組織を示す概略図である。FIG. 1 is a schematic view showing a cross-sectional structure of a dough surface formed by a surface treatment method of the present invention.
【図２】水栓具の例であって、内部に複数の摺動部材を
持つ湯水混合栓の正面縦断面図である。FIG. 2 is a front vertical cross-sectional view of a hot and cold water mixing tap, which is an example of the tap fitting and has a plurality of sliding members inside.
【符号の説明】 １ 生地 ２ Ｓｎ−Ｎｉ合金めっき層 ３ クロメート被膜[Explanation of reference numerals] 1 cloth 2 Sn-Ni alloy plating layer 3 chromate film
Claims (1)
体及びその内蔵部品に対して、素材生地の表面に０．５
〜２ミクロンの厚さのＳｎ−Ｎｉ合金めっき層を施し、
このＳｎ−Ｎｉ合金めっき層の表面に電解クロメート被
膜を形成することを特徴とする水栓金具及びその内蔵部
品の表面処理方法。1. The surface of the material cloth is 0.5 with respect to the body of the faucet and its built-in parts made of copper or copper alloy.
~ 2 micron thick Sn-Ni alloy plating layer is applied,
A surface treatment method for a faucet metal fitting and its built-in parts, characterized in that an electrolytic chromate film is formed on the surface of the Sn-Ni alloy plating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03293468A JP3119309B2 (en) | 1991-11-08 | 1991-11-08 | Water faucet fitting and surface treatment method for its built-in component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03293468A JP3119309B2 (en) | 1991-11-08 | 1991-11-08 | Water faucet fitting and surface treatment method for its built-in component |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05125584A true JPH05125584A (en) | 1993-05-21 |
| JP3119309B2 JP3119309B2 (en) | 2000-12-18 |
Family
ID=17795142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03293468A Expired - Fee Related JP3119309B2 (en) | 1991-11-08 | 1991-11-08 | Water faucet fitting and surface treatment method for its built-in component |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3119309B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0698191A4 (en) * | 1994-02-10 | 1999-07-21 | Masco Corp | Plumbing fixture carrying drinking water comprised of a copper alloy |
| EP0964104A3 (en) * | 1998-06-09 | 2000-11-29 | Watts Regulator Co. | Blackflow preventer assembly |
| US6325090B1 (en) | 1998-06-09 | 2001-12-04 | Watts Investment Company | Backflow preventer assembly |
| JPWO2005085500A1 (en) * | 2004-03-05 | 2008-04-24 | 株式会社キッツ | Nickel elution prevention method, nickel elution prevention protective film forming agent, and nickel elution prevention detergent for copper alloy wetted parts |
| EP2034054A1 (en) * | 2007-09-07 | 2009-03-11 | VIEGA GmbH & Co. KG. | Method for manufacturing a coated components for fluid carrying assembly sections and coated component |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5457086B2 (en) * | 2009-06-23 | 2014-04-02 | 株式会社キッツ | Ball for ball valve excellent in chlorine resistance and dezincification corrosion resistance, its plating method and ball valve |
-
1991
- 1991-11-08 JP JP03293468A patent/JP3119309B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0698191A4 (en) * | 1994-02-10 | 1999-07-21 | Masco Corp | Plumbing fixture carrying drinking water comprised of a copper alloy |
| EP0964104A3 (en) * | 1998-06-09 | 2000-11-29 | Watts Regulator Co. | Blackflow preventer assembly |
| US6325090B1 (en) | 1998-06-09 | 2001-12-04 | Watts Investment Company | Backflow preventer assembly |
| US6446652B1 (en) | 1998-06-09 | 2002-09-10 | Watts Regulator Co. | Backflow preventer assembly |
| JPWO2005085500A1 (en) * | 2004-03-05 | 2008-04-24 | 株式会社キッツ | Nickel elution prevention method, nickel elution prevention protective film forming agent, and nickel elution prevention detergent for copper alloy wetted parts |
| EP1722010A4 (en) * | 2004-03-05 | 2010-02-24 | Kitz Corp | Method of preventing nickel leaching from copper alloy made liquid-contact equipment item, protective film forming agent for nickel leaching prevention and cleaner for nickel leaching prevention |
| US8182879B2 (en) | 2004-03-05 | 2012-05-22 | Kitz Corporation | Method for preventing elution of nickel from water-contact instrument of copper alloy by formation of a protective film |
| EP2034054A1 (en) * | 2007-09-07 | 2009-03-11 | VIEGA GmbH & Co. KG. | Method for manufacturing a coated components for fluid carrying assembly sections and coated component |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3119309B2 (en) | 2000-12-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5831097A (en) | Joint having excellent seizure resistance for oil well pipe and production | |
| US20190055664A1 (en) | Method for coating an object by means of a multilayer system with a nickel-phosphorus alloy | |
| RU2132012C1 (en) | Fittings for supply of potable water and method of application of essentially inert coat | |
| JP3119309B2 (en) | Water faucet fitting and surface treatment method for its built-in component | |
| GB2218111A (en) | Coating metallic substrates by the PVD process | |
| JP4332319B2 (en) | Method of coating a workpiece with bearing metal and workpiece processed by this method | |
| JPH02217497A (en) | Nickel-tungsten-silicon carbide composite plating method | |
| JPH1025594A (en) | Nickel-chromium plating method | |
| GB2145739A (en) | Process for preparing improved zn-ni-alloy electroplated steel sheets | |
| JP2001348679A (en) | Method for plating water supply fitting made of copper or copper alloy and its plated product | |
| JPH04346693A (en) | Conductor roll for electroplating | |
| JP2914176B2 (en) | Low gloss blackened steel sheet | |
| JP4872118B2 (en) | Water supply equipment | |
| JPH0219199B2 (en) | ||
| JP6758611B2 (en) | High design sliding member | |
| JPH06240490A (en) | Corrosion resistance chrome plating | |
| JP2003138396A (en) | Nickel chrome plating method and appliance for water system subjected to this plating | |
| JP2001348681A (en) | Apparatus for city water made of copper or copper alloy | |
| US6312580B1 (en) | Method for gold plating chromium and other passive metals | |
| JP2001348692A (en) | Method for plating copper-alloy water feeding utensil and its plated product | |
| Gamburg et al. | Technologies for the electrodeposition of metals and alloys: electrolytes and processes | |
| JP2000179016A (en) | Surface treatment for water faucet metal fitting | |
| JPH08120482A (en) | Antibacterial plated product | |
| JPS62298648A (en) | Sliding member for internal combustion engine | |
| JPH06193758A (en) | Water cock metal fitting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |