JPS6358232B2 - - Google Patents
Info
- Publication number
- JPS6358232B2 JPS6358232B2 JP487481A JP487481A JPS6358232B2 JP S6358232 B2 JPS6358232 B2 JP S6358232B2 JP 487481 A JP487481 A JP 487481A JP 487481 A JP487481 A JP 487481A JP S6358232 B2 JPS6358232 B2 JP S6358232B2
- Authority
- JP
- Japan
- Prior art keywords
- plating
- gold
- alloy plating
- alloy
- color
- 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.)
- Expired
Links
- 238000007747 plating Methods 0.000 claims description 51
- 229910045601 alloy Inorganic materials 0.000 claims description 15
- 239000000956 alloy Substances 0.000 claims description 15
- 229910017398 Au—Ni Inorganic materials 0.000 claims description 10
- 239000010956 nickel silver Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- MOFOBJHOKRNACT-UHFFFAOYSA-N nickel silver Chemical compound [Ni].[Ag] MOFOBJHOKRNACT-UHFFFAOYSA-N 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 4
- 229910001369 Brass Inorganic materials 0.000 claims description 3
- 229910052793 cadmium Inorganic materials 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 2
- 239000010931 gold Substances 0.000 description 22
- 229910052737 gold Inorganic materials 0.000 description 21
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 17
- 229910000925 Cd alloy Inorganic materials 0.000 description 8
- 229910001316 Ag alloy Inorganic materials 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910001097 yellow gold Inorganic materials 0.000 description 4
- 239000010930 yellow gold Substances 0.000 description 4
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 229910002708 Au–Cu Inorganic materials 0.000 description 2
- 229910017392 Au—Co Inorganic materials 0.000 description 2
- 229910015363 Au—Sn Inorganic materials 0.000 description 2
- -1 Potassium cyancadmium Chemical compound 0.000 description 2
- PPVNYSRNJQOELF-UHFFFAOYSA-N [K].[Au].N#CC#N Chemical compound [K].[Au].N#CC#N PPVNYSRNJQOELF-UHFFFAOYSA-N 0.000 description 2
- 150000002343 gold Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910002710 Au-Pd Inorganic materials 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 150000001661 cadmium Chemical class 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 150000002471 indium Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- KERTUBUCQCSNJU-UHFFFAOYSA-L nickel(2+);disulfamate Chemical compound [Ni+2].NS([O-])(=O)=O.NS([O-])(=O)=O KERTUBUCQCSNJU-UHFFFAOYSA-L 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- HKSGQTYSSZOJOA-UHFFFAOYSA-N potassium argentocyanide Chemical compound [K+].[Ag+].N#[C-].N#[C-] HKSGQTYSSZOJOA-UHFFFAOYSA-N 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 1
- 239000001509 sodium citrate Substances 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 150000003751 zinc Chemical class 0.000 description 1
Landscapes
- Electroplating And Plating Baths Therefor (AREA)
- Electroplating Methods And Accessories (AREA)
Description
【発明の詳細な説明】
本発明は、Au−Ag−Cd系合金メツキを施した
外装部品に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an exterior part plated with an Au-Ag-Cd alloy.
従来、外装部品例えば時計用外装部品（時計側
として胴、裏ブタ、縁などや、バンド、リーズな
ど）の金メツキ構成としては洋白材または黄銅材
を使用した素材の表面にまずAu−Ag系合金メツ
キを下地メツキとして施し、その上に仕上げメツ
キとしてAu−Ni系合金メツキまたは、Au−Co、
Au−Cu、Au−Pd、Au−Sn等の合金メツキを行
つていた。この金メツキ構成において、仕上げメ
ツキとして施されるAu−Ni系合金メツキは、色
調の点でおちついた高級感のある金色を呈し、
我々の要求する色調にマツチしている。しかし、
Au−Ni系合金メツキは、現在K23と金相が高く、
しかも、メツキ層の応力が高いために、3μ位が
厚付の限界である。また、金相を下げようとして
Niをふやすと色の点とメツキ応力の点で不可能
である。したがつて、現在のように金価格高謄の
中で、コスト的に大きなネツクとなつている。仕
上げメツキとして他にAu−Co、Au−Cu、Au−
Pd、Au−Sn等の合金メツキがあるが、やはり
Au−Ni系合金メツキと同様に厚付ができず、さ
らに金相が高いためコスト的に大きなネツクにな
つている。さらに、基部金メツキとして使用され
ているAu−Ag系合金メツキは金相もK14〜K18
と低く数十μの厚付が可能であるが、現行より
Agの含有量をふやし金相を落としK14以下にな
つていくと、本来イエローゴールド色を呈してい
たものが、黄味がなくなり白色になつてしまい、
仕上のAu−Ni系合金メツキがマモウした場合、
極端な色調差が生じると共に、Agの含有量を増
加したことによる耐食性の低下が見られ、これま
たコストダウンにならず、大きなネツクとなつて
いる。 Conventionally, the gold plating structure of exterior parts for watches, such as the body, back cover, rim, etc., bands, and leashes on the watch side, has been made by first applying Au-Ag to the surface of a material using nickel silver or brass. A base alloy plating is applied as the base plating, and then Au-Ni alloy plating, Au-Co, or Au-Ni alloy plating is applied as the base plating.
Alloy plating of Au-Cu, Au-Pd, Au-Sn, etc. was performed. In this gold plating configuration, the Au-Ni alloy plating applied as the finishing plating has a calm and luxurious golden color in terms of color tone.
It matches the color tone we requested. but,
Au-Ni alloy plating currently has a high gold phase of K23,
Moreover, since the stress of the plating layer is high, the thickness limit is about 3μ. Also, trying to lower the gold price
If Ni is increased, it is impossible in terms of color and plating stress. Therefore, with the current high price of gold, it has become a major cost bottleneck. Other finishing plating options include Au-Co, Au-Cu, Au-
There are alloy platings such as Pd and Au-Sn, but
Like Au-Ni alloy plating, it cannot be thickly plated and has a high metal phase, which is a big cost problem. Furthermore, the gold phase of the Au-Ag alloy plating used as the base gold plating ranges from K14 to K18.
Thickness as low as several tens of microns is possible, but compared to current
When the Ag content is increased and the gold phase is reduced to K14 or lower, the color that originally had a yellow gold color loses its yellowness and becomes white.
If the finishing Au-Ni alloy plating becomes dull,
An extreme difference in color tone occurs, and a decrease in corrosion resistance is observed due to the increased content of Ag, which is also a major bottleneck in preventing cost reductions.
本発明の目的は、このような欠点をカバーする
ために、素材とAu−Ni系合金メツキとの間にAu
−Ag−Cd系合金メツキを施こすことにより、コ
スト的に安価で、耐食性のよい金メツキを施した
外装部品を提供することにある。 The purpose of the present invention is to cover such drawbacks by adding Au between the material and the Au-Ni alloy plating.
-An object of the present invention is to provide a gold-plated exterior part that is inexpensive in cost and has good corrosion resistance by applying Ag-Cd alloy plating.
以下本発明の詳細な説明について以下に述べ
る。本発明の外装部品に適用されている金メツキ
の構成は、洋白材または黄銅材を使用した素材の
表面に中間メツキ層として、Au−Ag−Cd系合金
メツキ層を施し、その上に仕上げメツキ層として
Au−Ni系合金メツキ層を施したものである。こ
の金メツキ構成の中で、Au−Ag−Zn系合金メツ
キは重量比で、Ag40〜55％、Cd5〜15％、残部
金及び不可避不純物からなるものである。この
Au−Ag−Cd系合金メツキの特徴としては、従来
のAu−Ag系合金メツキに比べ、金相が２〜３カ
ラツト位低くでき、コスト的に非常に安価である
こと。さらには、金相を下げる量だけZnが入つ
ても、耐食性が従来のAu−Ag系合金メツキに比
べて、同等であり、しかも、メツキ液に使用され
るCol化合物が青みがかつた銀白色を呈している
ため、金相を下げても、色調は、青みのあるイエ
ローゴールド色を呈している。また、Cdは軟ら
かい金属でAu−Ag−Znメツキよりも厚付メツキ
も可能である。さらにカドミニウム塩は、亜鉛塩
又はインジウム塩に比べ、メツキ後の本発明の
Au−Ag−Cd系合金メツキは、Ag含有量が55％
をこえると、色調が白色になり、耐食性を低下さ
せる。また、Agの含有量が40％未満であると、
その分金相が高くなり、コストアツプとなつてし
まう。Cdの含有量が15％を越えると、色調が白
色を呈し、耐食性も低下する。また、Cdの含有
量が５％未満であると、大半がAu及びAgで占め
られるため、金相も高くコストアツプとなる。さ
らには、Agの含有量も多くなるため、耐食性の
低下を招くことになる。本発明のAu−Ag−Cd系
合金メツキは、金相がK10〜K12位で、従来の
Au−Ag系合金メツキに比べコスト的に安価であ
る。また色調の点でも、金相が低い分を、Cd金
属ですぎない、従来のAu−Ag系合金メツキに近
い青みのあるイエローゴールド色を呈している。 A detailed explanation of the present invention will be given below. The structure of the gold plating applied to the exterior parts of the present invention is to apply an Au-Ag-Cd alloy plating layer as an intermediate plating layer to the surface of a material using nickel silver or brass material, and then finish it. As a metsuki layer
It is coated with an Au-Ni alloy plating layer. In this gold plating structure, the Au-Ag-Zn alloy plating consists of 40 to 55% Ag, 5 to 15% Cd, and the balance gold and unavoidable impurities. this
The characteristic of Au-Ag-Cd alloy plating is that compared to conventional Au-Ag alloy plating, the gold phase can be lowered by about 2 to 3 carats, making it extremely inexpensive. Furthermore, even if Zn is added in an amount that lowers the gold phase, the corrosion resistance is equivalent to that of conventional Au-Ag alloy plating, and the Col compound used in the plating liquid has a silvery white color with a bluish tinge. Therefore, even if the gold phase is lowered, the color tone remains a bluish yellow gold color. Furthermore, Cd is a soft metal and can be plated thicker than Au-Ag-Zn plating. Furthermore, cadmium salts have a higher resistance to the present invention after plating than zinc salts or indium salts.
Au-Ag-Cd alloy plating has an Ag content of 55%
If it exceeds 100%, the color becomes white and corrosion resistance decreases. In addition, if the Ag content is less than 40%,
As a result, the price of gold becomes more expensive, leading to an increase in costs. When the Cd content exceeds 15%, the color becomes white and the corrosion resistance decreases. Furthermore, if the Cd content is less than 5%, most of the content is occupied by Au and Ag, which increases the metal phase and increases costs. Furthermore, since the Ag content also increases, corrosion resistance deteriorates. The Au-Ag-Cd alloy plating of the present invention has a gold phase of K10 to K12, which is different from the conventional one.
It is cheaper in cost than Au-Ag alloy plating. Also, in terms of color tone, due to the low gold phase, it has a bluish yellow gold color similar to conventional Au-Ag alloy plating, which is just Cd metal.
メツキ厚みは0.25μ未満では中間層として効果
がなく、5μをこえるとコストアツプになるので、
0.25〜5μの範囲が望ましい。 If the thickness of the plating is less than 0.25μ, it will not be effective as an intermediate layer, and if it exceeds 5μ, the cost will increase.
A range of 0.25 to 5μ is desirable.
以下、本発明のAu−Ag−Zn系合金メツキにつ
いて実施例に従つて詳細に説明する。 Hereinafter, the Au-Ag-Zn based alloy plating of the present invention will be explained in detail according to Examples.
実施例 １
胴素材として洋白材を用い、プレス、研麿仕上
げした後、光沢ニツケルメツキを温度20℃、Dk
＝1.0A／ｄm21μ付け、その上にAu−Ag−Cd合
金メツキを、温度60℃、Dk＝1.5A／ｄm2PH＝8.5
2.4μ施こしさらに、Au−Ni系合金メツキを、温
度60℃Dk＝1.5A／ｄm2PH＝3.5 1.8μを施こした。
具体的メツキ条件は下記のとうりである。Example 1 Nickel silver was used as the body material, and after being pressed and polished, it was coated with glossy nickel plating at a temperature of 20°C and D k
= 1.0A/dm 2 1μ, Au-Ag-Cd alloy plating on top, temperature 60℃, D k = 1.5A/dm 2 PH = 8.5
Further, Au--Ni alloy plating was applied at a temperature of 60° C. D k =1.5 A/dm 2 PH = 3.5 and 1.8 μ.
The specific plating conditions are as follows.
合金組成
Au−Ag−Cd
シアン金カリウム 15ｇ／
シアン銀カリウム 10ｇ／
シアンカドミカリウム 0.5ｇ／
酒石酸カリウム 50ｇ／
Au−Ni
シアン金カリウム 11ｇ／
スルフアミン酸ニツケル 11ｇ／
クエン酸およびクエン酸ナトリウム70ｇ／
上記の方法にてメツキ付したものと、従来の金
メツキ付けを行なつた時計用側で、耐食性につい
て40℃中に人工汗に浸漬して、比較テストを行な
つた結果、同等であつた。Alloy composition Au-Ag-Cd Potassium cyanogen gold 15g / Potassium silver cyanide 10g / Potassium cyancadmium 0.5g / Potassium gold tartrate 50g / Au-Ni Potassium cyanogen gold 11g / Nickel sulfamate 11g / Citric acid and sodium citrate 70g / Above A comparison test was conducted on the corrosion resistance of the watch side plated with this method and the watch side plated with conventional gold plating by immersing it in artificial sweat at 40°C, and the result was that they were equivalent.
また、実施例のAu−Ag−Cd合金メツキを組成
分析したところ、Au43％、Ag46％、Cd11％とな
つており、金相が10.3カラツトであり、従来の
Au−Ag系合金メツキの14カラツトに比べ3.7カ
ラツト位低く15％位のコストダウンが可能となつ
た。さらに、色調も青みがかつたイエローゴール
ド色を呈し、従来のAu−Ag系合金メツキとかわ
りがなかつた。以上のように本発明のAu−Ag−
Cd系合金メツキの採用により、コスト的に安価
で品質のよい金メツキの時計用外装部品を供給す
るものである。 In addition, when the composition of the Au-Ag-Cd alloy plating of the example was analyzed, it was found to be 43% Au, 46% Ag, and 11% Cd, and the gold phase was 10.3 carat, which was different from the conventional one.
Compared to the 14 carat weight of Au-Ag alloy plating, the weight is about 3.7 carats lower, making it possible to reduce costs by about 15%. Furthermore, the color tone was a yellow gold color with a bluish tinge, which was the same as that of conventional Au-Ag alloy plating. As described above, the Au-Ag-
By using CD-based alloy plating, we will be able to supply low-cost, high-quality gold-plated watch exterior parts.
Claims (1)
び不可避的不純物からなるAu−Ag−Cd系の厚み
0.25〜5μの中間メツキ層と、 前記中間メツキ層上にAu−Ni系合金仕上メツ
キ層とを施したことを特徴とする外装部品。[Claims] 1 Thickness of Au-Ag-Cd system consisting of 40-55% Ag, 5-15% Cd, balance Au and inevitable impurities on either nickel silver or brass material
An exterior component comprising: an intermediate plating layer having a thickness of 0.25 to 5μ; and an Au-Ni alloy finishing plating layer provided on the intermediate plating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP487481A JPS57120686A (en) | 1981-01-16 | 1981-01-16 | Constitution of gold plating for external finishing parts for timepiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP487481A JPS57120686A (en) | 1981-01-16 | 1981-01-16 | Constitution of gold plating for external finishing parts for timepiece |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57120686A JPS57120686A (en) | 1982-07-27 |
| JPS6358232B2 true JPS6358232B2 (en) | 1988-11-15 |
Family
ID=11595810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP487481A Granted JPS57120686A (en) | 1981-01-16 | 1981-01-16 | Constitution of gold plating for external finishing parts for timepiece |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57120686A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH667361GA3 (en) * | 1986-02-04 | 1988-10-14 | ||
| ES2179952T3 (en) | 1995-11-03 | 2003-02-01 | Enthone Omi Inc | COMPOSITIONS AND DEPOSITS OF ELECTRODEPOSITION PROCEDURES. |
-
1981
- 1981-01-16 JP JP487481A patent/JPS57120686A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57120686A (en) | 1982-07-27 |
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