JPS5920497A - Gold plated case for wrist watch - Google Patents
Gold plated case for wrist watchInfo
- Publication number
- JPS5920497A JPS5920497A JP13058482A JP13058482A JPS5920497A JP S5920497 A JPS5920497 A JP S5920497A JP 13058482 A JP13058482 A JP 13058482A JP 13058482 A JP13058482 A JP 13058482A JP S5920497 A JPS5920497 A JP S5920497A
- Authority
- JP
- Japan
- Prior art keywords
- gold
- gold plated
- wrist watch
- pinholes
- plated case
- 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.)
- Pending
Links
Classifications
-
- 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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/24—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds
Abstract
Description
【発明の詳細な説明】
本発明は、下地ニッケルめっきを廃し、クロムの酸化皮
膜による金めつき層のピンホールの封孔処理を施した腕
時言１用金めつきケースに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gold-plated case for wristwatch 1 in which the base nickel plating is eliminated and pinholes in the gold-plated layer are sealed with a chromium oxide film.
従来の腕時計用金めつきケースには、特に処理がなさ扛
ておらず、金めつき層のピンホールを通して、まず、下
地ニッケルめっきからのニッケルの電解腐食が発生し、
さらに進行して下地金属の電解腐食が発生する、という
腐食発生機構により、著しく外観を損わせていた。Conventional gold-plated cases for watches do not undergo any special treatment, and electrolytic corrosion of nickel from the base nickel plating occurs through pinholes in the gold-plated layer.
The corrosion mechanism progresses further and causes electrolytic corrosion of the underlying metal, which significantly impairs the appearance.
未発明は、この様な欠点を除去するもので、腐食発生の
トリガー的存在であった下地ニッケルめっきを廃し、さ
らにクロムの酸化皮膜による金めつき層のピンホールの
封孔処理を施すことに１９、耐食性を著しく向上させた
腕時引用金めつきケースを提供することを目的としたも
のである。The uninvented product eliminates these drawbacks by eliminating the underlying nickel plating, which was a trigger for corrosion, and by sealing the pinholes in the gold plating layer with a chromium oxide film. 19. The object of the present invention is to provide a gold-plated watch case with significantly improved corrosion resistance.
本発明の特徴は、下地ニッケルめっきを廃し、クロム酸
又は重クロム酸を主体とした処理液に浸漬又は塗布によ
り、金めつき層のピンポールにクロムの酸化皮膜を形成
させて封孔処ｖｌ！を施した腕時泪用金めつきケースで
ある。The feature of the present invention is that the base nickel plating is eliminated, and a chromium oxide film is formed on the pin pole of the gold plating layer by dipping or coating in a treatment solution mainly composed of chromic acid or dichromic acid. This is a gold-plated case for wristwatches.
以下、本発明の実施例について述べる。Examples of the present invention will be described below.
実施例１
下地ニッケルめっきを廃した腕時計用金めつきケースを
、クロム酸３１１／Ｌ、硫酸０．２５惜ｔ７ｔ、硝酸２
ｍ Ｌ ／ Ｌから成る処理液に１分間静かに浸漬し
た後、水洗し、熱風（６０〜ｂで乾燥させて封孔処理を
施した後１、人工汗浸漬（２４時間浸漬）による強制劣
化試験を行なったところ、次の表に示される様な結果と
なった。Example 1 A gold-plated wristwatch case that did not require base nickel plating was treated with 311/L of chromic acid, 0.25 tons of sulfuric acid, 7 tons of nitric acid, and 2 tons of nitric acid.
After being gently immersed in a treatment solution consisting of m L / L for 1 minute, washed with water, dried with hot air (60~B) and subjected to pore sealing treatment, 1, forced deterioration test by immersion in artificial sweat (24 hour immersion). When this was done, the results were as shown in the table below.
実施例２
下地ニッケルめっきを廃した腕時計出金めっきケースを
、重クロム酸カリウム？、Ｏｇ／ Ｌ 、硝酸２７１１
Ｌ ／ Ｌから成る処理液に１分間静かに浸漬した後
、水洗し、熱風（６０〜７０℃）で乾燥させて封孔処理
を施しまた後、実施例１と同様の人工汗浸漬（２４時間
浸漬）による強制劣化試験を行なったところ、腐食発生
が全く認められかかった。Example 2 A watch plating case that eliminates the base nickel plating is coated with potassium dichromate? , Og/L, nitric acid 2711
After being gently immersed in a treatment solution consisting of L/L for 1 minute, it was washed with water, dried with hot air (60 to 70°C) to seal the holes, and then soaked in artificial sweat for 24 hours in the same manner as in Example 1. When a forced deterioration test was conducted by immersion (immersion), no corrosion was observed at all.
なお、クロム酸主体の処理液については、実施例１の他
、クロム酸１ｙ７ｔ、硫ｆｉＯ，２ｒＬＬ／１１硝酸０
．２ｎｌ／ｌのもの及び、クロム酸１０ｐ／ｌ、硫酸５
ｍ ｔ／ｌ、硝酸２０ ＭＬ ｔ ／ Ｌ ％はうふ
つ酸２０ ｍ ｔ ／ ｔのもの及び、クロム酸５ ｇ
／ Ｌ、硫酸２ ＭＬ Ｚ ／ Ｚ ％硝酸２７ＷＬ／
Ｌ、ふつ化了ンモンス２１／ｌのもの、についても実施
例と同様の良好な効果が得ら牡た。In addition, in addition to Example 1, chromic acid-based treatment solutions include chromic acid 1y7t, sulfur fiO, 2rLL/11 nitric acid 0
．． 2nl/l, chromic acid 10p/l, sulfuric acid 5
m t/l, nitric acid 20 ml t/L % of bolfic acid 20 m t/t and chromic acid 5 g
/ L, sulfuric acid 2 ML Z / Z % nitric acid 27 WL /
Good effects similar to those of the Examples were also obtained with L.
以上のように、本発明によれば、著しく耐食性を°□向
上させた腕時計出金めつきケースが可能となった。As described above, according to the present invention, it has become possible to provide a wristwatch dispensing case with markedly improved corrosion resistance.
以上 出願人 株式会社第二精玉舎 代理人 弁理士最上 務that's all Applicant: Daini Seidamasha Co., Ltd. Agent: Patent Attorney Mogami
Claims (1)
き層のピンホールの表面に形成し工なる腕時組用金めつ
きケース。A gold-plated case for watch assembly that eliminates the base nickel plating and forms a chromium oxide film on the pinhole surface of the gold-plated layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13058482A JPS5920497A (en) | 1982-07-27 | 1982-07-27 | Gold plated case for wrist watch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13058482A JPS5920497A (en) | 1982-07-27 | 1982-07-27 | Gold plated case for wrist watch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5920497A true JPS5920497A (en) | 1984-02-02 |
Family
ID=15037700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13058482A Pending JPS5920497A (en) | 1982-07-27 | 1982-07-27 | Gold plated case for wrist watch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5920497A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62194166U (en) * | 1986-06-02 | 1987-12-10 |
-
1982
- 1982-07-27 JP JP13058482A patent/JPS5920497A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62194166U (en) * | 1986-06-02 | 1987-12-10 |
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