JPS5949320B2 - Decorative parts - Google Patents
Decorative partsInfo
- Publication number
- JPS5949320B2 JPS5949320B2 JP10912377A JP10912377A JPS5949320B2 JP S5949320 B2 JPS5949320 B2 JP S5949320B2 JP 10912377 A JP10912377 A JP 10912377A JP 10912377 A JP10912377 A JP 10912377A JP S5949320 B2 JPS5949320 B2 JP S5949320B2
- Authority
- JP
- Japan
- Prior art keywords
- tantalum
- chromium
- nickel
- base metal
- based alloy
- 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
Landscapes
- Electroplating Methods And Accessories (AREA)
Description
【発明の詳細な説明】
本発明はクロムを含むニッケル基合金からなる装飾品用
部材に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a decorative member made of a nickel-based alloy containing chromium.
眼鏡フレーム、時計ケース、時計バンドなどの装飾品に
は、耐食性を高め耐久性を向上させるために、基体金属
に貴金属を被せたものがある。Some decorative items, such as eyeglass frames, watch cases, and watch bands, have a base metal coated with a precious metal to increase corrosion resistance and improve durability.
従来、このような装飾品用部材としては、洋白、ステン
レスなどの基体金属に金、白金およびロジウムなどの貴
金属を被せたものが多く使用されている。しかし、これ
らの基体金属に貴金属層を設けたものは、長期の使用に
おいて点食を生ずるという欠点があわ実用上に不適であ
るという問題があつた。本発明はこのような問題を克服
した新規で優れた装飾品用部材を提供するものである。BACKGROUND ART Conventionally, as such decorative members, materials in which a base metal such as nickel silver or stainless steel is coated with a noble metal such as gold, platinum, or rhodium are often used. However, these base metals provided with a noble metal layer have the disadvantage of causing pitting during long-term use, making them unsuitable for practical use. The present invention provides a new and excellent decorative member that overcomes these problems.
本発明の装飾品用部材はクロム４〜２５９６（重量％）
を含むニッケル基合金の表面をタンタル層で覆うことを
特徴とするものである。The ornamental member of the present invention is chromium 4 to 2596 (wt%)
It is characterized by covering the surface of a nickel-based alloy containing tantalum with a tantalum layer.
すなわち、点食を生じない基体金属として、クロム４〜
２５％を含むニッケル基合金を使用し、この表面に装飾
的色調の高いタンタル層を設けて、実用的な装飾品用部
材を提供するものである。In other words, as a base metal that does not cause pitting, chromium 4~
A practical decorative member is provided by using a nickel-based alloy containing 25% and providing a tantalum layer with a high decorative color on the surface.
本発明による装飾品用部材を用いて、装飾品例えば眼鏡
フレーム、時計ケース、時計バンド、ライタ、楽器、置
物、ネックレス、プレスレッド、プローチなどを製造す
れば、装飾上も良好であるばかわでなく長期の使用にお
いても点食を生じない効果を有する。本発明の装飾品部
材が点食を生じない効果すなわち耐食性が良好であると
いうのは、タンタルとクロム４〜２５％を含むニッケル
基合金との電位差が小さいためと考えられる。If ornaments such as eyeglass frames, watch cases, watch bands, lighters, musical instruments, ornaments, necklaces, pressed threads, and pouches are manufactured using the ornamental member according to the present invention, it will be a decorative item that is good in terms of decoration. It has the effect of not causing pitting even during long-term use. The reason why the ornamental member of the present invention is effective in preventing pitting, that is, has good corrosion resistance, is considered to be because the potential difference between tantalum and the nickel-based alloy containing 4 to 25% chromium is small.
すなわち、基体金属にタンタル層を設けた金属材料の腐
食は、主としてタンタル層と基体金属とで構成される化
学電池の電位差の大小によつて規定され、電位差が大で
あると腐食され易いと云える。これはタンタル層が薄く
ポーラスであるから、この孔に汗などの電解質が触れる
とタンタル層と基体金属間に電池が形成され腐食が促進
されるという理由によるものである。本発明の装飾品用
部材において基体金属としてクロム４〜２５％を含むニ
ッケル基合金を用いる。In other words, corrosion of a metal material in which a tantalum layer is provided on the base metal is mainly determined by the magnitude of the potential difference of the chemical cell composed of the tantalum layer and the base metal, and it is said that the larger the potential difference, the more likely it is to be corroded. I can do it. This is because the tantalum layer is thin and porous, and when electrolyte such as sweat comes into contact with the pores, a battery is formed between the tantalum layer and the base metal, accelerating corrosion. In the decorative member of the present invention, a nickel-based alloy containing 4 to 25% chromium is used as the base metal.
このニッケル基合金には銅、けい素、マンガン、アルミ
ニウム、チタンなどの１種または２種以上を脱酸剤とし
て総計で４９６までを含むことが可能であわ、また銅、
鉄、テルル、鉛、銀、希土類元素、硫黄のうち１種以上
を快削性向上のために６チまで添加することも可能であ
る。クロムはタンタルとの電位差を極力小さくするため
に添加するもので、本発明の効果を得るためには４〜２
５９６の範囲が最適である。タンタルはそれ自体で装置
的色調が優れており、クロムを含むニッケル基合金と組
合せて耐食性を向上できるから用いられる。クロムを含
むニッケル基合金にタンタル層を設ける方法は、例えば
メッキ、クラッドなどの方法があり、その方法には限定
されない。タンタル層の厚みは０．１〜数μである。比
較例
本発明による装飾品用部材（試料１，２）と、従来の装
飾品用部材（試料３，４，５，６，）における基体金属
とタJャ塔^ル層間の電位差を各々測定した。This nickel-based alloy can contain one or more of copper, silicon, manganese, aluminum, titanium, etc. as a deoxidizer, up to a total of 496%.
It is also possible to add up to 6 elements of one or more of iron, tellurium, lead, silver, rare earth elements, and sulfur to improve free machinability. Chromium is added to minimize the potential difference with tantalum, and in order to obtain the effects of the present invention, chromium is added to
A range of 596 is optimal. Tantalum is used because it has excellent mechanical color tone by itself and can improve corrosion resistance when combined with a chromium-containing nickel-based alloy. Methods for providing a tantalum layer on a chromium-containing nickel-based alloy include, for example, plating and cladding, but are not limited to these methods. The thickness of the tantalum layer is 0.1 to several microns. Comparative Example Measurement of the potential difference between the base metal and the tower layer in decorative parts according to the present invention (Samples 1, 2) and conventional decorative parts (Samples 3, 4, 5, 6). did.
その測定方法は図示するようなものであり、図中１は３
％食塩水、２はタンタル、３は基体金属、４は電位差計
で、電位差計４は±３０ｍｖの範囲で測定できる。電位
差の測定結果は第１表の通りである。The measurement method is as shown in the figure, where 1 is 3.
% saline, 2 is tantalum, 3 is the base metal, 4 is a potentiometer, and the potentiometer 4 can measure within a range of ±30 mv. The measurement results of the potential difference are shown in Table 1.
この発明に用いる基体金属は従来の基体金属に比較して
タンタルとの電位差は約ネ〜と品と極めて低く、この発
明による装飾品用部材は従来のものに比して耐食性が大
であることが認められる。Compared to conventional base metals, the base metal used in this invention has an extremely low potential difference with tantalum of about 100%, and the decorative member according to this invention has greater corrosion resistance than conventional ones. is recognized.
次いで、ＪＩＳ２３７ｌの規定による塩水噴霧試験を行
なつた。その結果を第２表に示す。Next, a salt spray test was conducted according to JIS 237l. The results are shown in Table 2.
図は実施例における電位差測定の方法を示す説明図であ
る。
１・・・・・・食塩水、２・・・・・・タンタル、３・
・・・・・基体金属。The figure is an explanatory diagram showing a method of measuring potential difference in an example. 1...Saline solution, 2...Tantalum, 3.
...Base metal.
Claims (1)
の表面をタンタル層で覆うことを特徴とする装飾品用部
材。1. An ornamental member characterized in that the surface of a nickel-based alloy containing 4 to 25% (by weight) chromium is covered with a tantalum layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10912377A JPS5949320B2 (en) | 1977-09-10 | 1977-09-10 | Decorative parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10912377A JPS5949320B2 (en) | 1977-09-10 | 1977-09-10 | Decorative parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5442262A JPS5442262A (en) | 1979-04-04 |
| JPS5949320B2 true JPS5949320B2 (en) | 1984-12-01 |
Family
ID=14502133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10912377A Expired JPS5949320B2 (en) | 1977-09-10 | 1977-09-10 | Decorative parts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5949320B2 (en) |
-
1977
- 1977-09-10 JP JP10912377A patent/JPS5949320B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5442262A (en) | 1979-04-04 |
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