JPH04289175A - Method for plating titanium or titanium alloy material with noble metal - Google Patents

Method for plating titanium or titanium alloy material with noble metal

Info

Publication number
JPH04289175A
JPH04289175A JP1402591A JP1402591A JPH04289175A JP H04289175 A JPH04289175 A JP H04289175A JP 1402591 A JP1402591 A JP 1402591A JP 1402591 A JP1402591 A JP 1402591A JP H04289175 A JPH04289175 A JP H04289175A
Authority
JP
Japan
Prior art keywords
plating
titanium
alloy material
titanium alloy
noble metal
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
Application number
JP1402591A
Other languages
Japanese (ja)
Inventor
Yoshinori Fujii
藤井 義則
Tadashi Hattori
服部 唯史
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nishiyama Stainless Chemical Co Ltd
Original Assignee
Nishiyama Stainless Chemical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nishiyama Stainless Chemical Co Ltd filed Critical Nishiyama Stainless Chemical Co Ltd
Priority to JP1402591A priority Critical patent/JPH04289175A/en
Publication of JPH04289175A publication Critical patent/JPH04289175A/en
Pending legal-status Critical Current

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  • Electroplating Methods And Accessories (AREA)

Abstract

PURPOSE:To surely plate a Ti or Ti alloy material with a noble metal at a low cost with high adhesion by activating the surface of the Ti or Ti alloy material to be plated. CONSTITUTION:A treating soln. contg. >=50% strong acid such as concd. sulfuric acid or concd. hydrochloric acid is heated and a Ti or Ti alloy material freed of the oxidized film by chemical polishing is immersed in the heated treating soln. to activate the surface. This activated surface is subjected to bright Ni plating as under plating for noble metal plating. Fine luster is rendered and the amt. of the noble metal used is reduced.

Description

【発明の詳細な説明】[Detailed description of the invention]

【0001】0001

【産業上の利用分野】本発明は、チタン材又はチタン合
金材への貴金属メッキ方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of plating a titanium material or a titanium alloy material with a precious metal.

【0002】0002

【従来の技術】チタンは軽量で耐食性に優れているため
、各種の製品に使用されている。近年、眼鏡フレーム又
は腕時計等の装身具、スプーン等の食器及び建材材料へ
の利用価値が高まるにつれ、外観を美しくするためにチ
タン材又はチタン合金材表面に貴金属メッキを施すこと
がなされており、種々のメッキ方法が試みられてきた。
[Prior Art] Titanium is lightweight and has excellent corrosion resistance, so it is used in various products. In recent years, as the value of use for accessories such as eyeglass frames and watches, tableware such as spoons, and building materials has increased, precious metal plating has been applied to the surface of titanium or titanium alloy materials to improve the appearance. plating methods have been attempted.

【0003】0003

【発明が解決しようとする課題】ところが、チタン材又
はチタン合金材へ直接貴金属メッキを施した場合、チタ
ン材又はチタン合金材と貴金属メッキとの密着性が悪い
ため、メッキの剥離、光沢不足等が問題となっていた。 光沢性を付与するため、従来はチタン材又はチタン合金
材の表面にニッケル張りを行ったのちに貴金属メッキを
行っていたが、製造加工コストが非常に高くなり、また
製造加工中にニッケルの張り材が剥がれ、脱落する等の
問題があった。
[Problems to be Solved by the Invention] However, when precious metal plating is applied directly to titanium or titanium alloy materials, the adhesion between the titanium or titanium alloy materials and the precious metal plating is poor, resulting in peeling of the plating, lack of gloss, etc. was a problem. Conventionally, the surface of titanium or titanium alloy material was coated with nickel and then plated with precious metals to give it luster, but this resulted in extremely high manufacturing costs and the need to apply nickel during the manufacturing process. There were problems with the material peeling off and falling off.

【0004】特開昭59─162296号公報に開示さ
れている発明では、チタン材又はチタン合金材にニッケ
ルメッキを施してから貴金属メッキを施すことにしてい
るが、この方法を含めた何れの方法においてもチタン材
又はチタン合金材と貴金属メッキとの密着性が悪く、粘
着テープ法及び碁盤目テスト法(JIS  K5400
)の試験を実施した場合、メッキの剥離が確認された。
[0004] In the invention disclosed in JP-A-59-162296, a titanium material or a titanium alloy material is plated with nickel and then plated with a precious metal. Also, the adhesion between titanium material or titanium alloy material and precious metal plating is poor, and adhesive tape method and grid test method (JIS K5400
), peeling of the plating was confirmed.

【0005】本発明は斯かる事情に鑑みなされたもので
あり、メッキの前処理として、弗化水素を含有する処理
液にチタン材又はチタン合金材を浸漬して化学研磨し、
次に強酸を50%以上含有した処理液を加温し、これに
浸漬して表面を活性化することにより、密着性よく、確
実に安価に貴金属メッキを施すことを可能にするチタン
材又はチタン合金材への貴金属メッキ方法を提供するこ
とを目的とする。
The present invention was made in view of the above circumstances, and as a pretreatment for plating, a titanium material or a titanium alloy material is immersed in a treatment solution containing hydrogen fluoride and chemically polished.
Next, titanium material or titanium that enables noble metal plating to be applied reliably and inexpensively with good adhesion by heating a treatment solution containing 50% or more of strong acid and immersing it in it to activate the surface. The purpose of this invention is to provide a method for plating precious metals on alloy materials.

【0006】[0006]

【課題を解決するための手段】第1発明に係るチタン材
又はチタン合金材への貴金属メッキ方法は、メッキの前
処理として、弗化水素を含有する処理液にチタン材又は
チタン合金材を浸漬して化学研磨し、次に強酸を50%
以上含有する処理液を加温し、これに浸漬して表面を活
性化することを特徴とする。第2発明に係るチタン材又
はチタン合金材への貴金属メッキ方法は、活性化した表
面に下地メッキとしての光沢ニッケルメッキを施すこと
を特徴とする。
[Means for Solving the Problems] A method for plating a titanium material or a titanium alloy material with a precious metal according to the first invention includes immersing the titanium material or titanium alloy material in a treatment solution containing hydrogen fluoride as a pretreatment for plating. chemical polishing, then 50% strong acid
The method is characterized in that the surface is activated by heating the treatment solution containing the above and immersing it therein. A method for plating a titanium material or a titanium alloy material with a precious metal according to a second aspect of the invention is characterized in that bright nickel plating is applied to the activated surface as a base plating.

【0007】[0007]

【作用】本発明においては、メッキの前処理として、弗
化水素を含有する処理液にチタン材又はチタン合金材を
浸漬して化学研磨するので表面を被覆している酸化被膜
が除去される。そして次に強酸を50%以上含有する処
理液を加温し、これに化学研磨したチタン材又はチタン
合金材を浸漬するので、チタン材又はチタン合金材の表
面が充分に活性化され、密着性よく貴金属メッキを施す
ことができる。さらに従来は貴金属メッキの厚付け等に
より光沢を得ていたが、本発明では表面が充分に活性化
されているので、貴金属メッキの下地メッキとして光沢
ニッケルメッキを施すことが可能となり、光沢がよくな
るので貴金属メッキを薄付けにすることができる。
In the present invention, as a pretreatment for plating, the titanium material or titanium alloy material is immersed in a treatment solution containing hydrogen fluoride and chemically polished, so that the oxide film covering the surface is removed. Next, a treatment solution containing 50% or more of strong acid is heated and the chemically polished titanium material or titanium alloy material is immersed in it, so the surface of the titanium material or titanium alloy material is sufficiently activated and the adhesion is improved. Can be well plated with precious metals. Furthermore, conventionally, gloss was obtained by thickening precious metal plating, etc., but in the present invention, the surface is sufficiently activated, so it is possible to apply bright nickel plating as a base plating for precious metal plating, improving gloss. Therefore, precious metal plating can be applied thinly.

【0008】[0008]

【実施例】以下、本発明をその実施例に基づき具体的に
説明する。本発明においては第1前処理としてチタン材
又はチタン合金材をアルカリ洗浄液により脱脂する。次
に第2前処理として弗化水素を含む処理液により化学研
磨する。そして第3前処理として、例えば濃硫酸又は濃
塩酸等の強酸を50%以上含有する処理液を加温し、こ
れにチタン材又はチタン合金材を浸漬して表面を活性化
する。
EXAMPLES The present invention will be specifically explained below based on examples. In the present invention, as a first pretreatment, the titanium material or titanium alloy material is degreased with an alkaline cleaning solution. Next, as a second pretreatment, chemical polishing is performed using a treatment solution containing hydrogen fluoride. As a third pretreatment, a treatment solution containing 50% or more of a strong acid such as concentrated sulfuric acid or concentrated hydrochloric acid is heated, and the titanium material or titanium alloy material is immersed in the solution to activate the surface.

【0009】従来は脱脂及び化学研磨後、常温で濃硫酸
を略30%含有する処理液にチタン材又はチタン合金材
を1分間浸漬していたが、表面の活性化が不充分であり
、メッキが剥離し易く、密着性よく貴金属メッキを行う
ことができなかった。そこで濃硫酸の濃度を30〜50
%にし、液温を40℃にした処理液にチタン材又はチタ
ン合金材を5分間浸漬することにしたが、表面の活性化
はやはり不充分であった。これに貴金属メッキして粘着
テープ法及び碁盤目テスト法の試験を行った場合、メッ
キが剥離した。次に濃硫酸の濃度を30〜50%にし、
液温を50℃にした処理液にチタン材又はチタン合金材
を5分間浸漬したが、貴金属メッキ後に粘着テープ法及
び碁盤目テスト法の試験を行った場合、メッキが剥離し
た。濃塩酸を使用して同様の実験を行ったが、やはりチ
タン材又はチタン合金材の貴金属メッキに対する密着性
は不充分であった。濃硫酸の濃度を50%以上にし、液
温を50℃以上に保った処理液にチタン材又はチタン合
金材を5分間浸漬したところ、表面が充分活性化され、
密着性よく貴金属メッキをチタン材又はチタン合金材に
施すことができた。粘着テープ法及び碁盤目テスト法の
試験を実施した場合、メッキは剥離しなかった。 さらに液温を上げる程短時間で活性化処理ができること
が判った。また、塩酸の場合は濃塩酸を使用し、液温を
60℃以上に保った処理液にチタン材又はチタン合金材
を5分間浸漬すると表面が充分活性化されることが判っ
た。
Conventionally, after degreasing and chemical polishing, titanium or titanium alloy materials were immersed for 1 minute in a treatment solution containing about 30% concentrated sulfuric acid at room temperature, but the activation of the surface was insufficient, and plating It was easy to peel off, and it was not possible to perform noble metal plating with good adhesion. Therefore, the concentration of concentrated sulfuric acid was adjusted to 30 to 50.
% and the titanium material or titanium alloy material was immersed for 5 minutes in a treatment solution with a liquid temperature of 40°C, but the activation of the surface was still insufficient. When this was plated with a precious metal and tested using the adhesive tape method and the grid test method, the plating peeled off. Next, increase the concentration of concentrated sulfuric acid to 30-50%,
A titanium material or a titanium alloy material was immersed in a treatment solution at a temperature of 50° C. for 5 minutes, but when the adhesive tape method and the grid test method were conducted after precious metal plating, the plating peeled off. A similar experiment was conducted using concentrated hydrochloric acid, but the adhesion of the titanium material or titanium alloy material to the noble metal plating was still insufficient. When a titanium material or titanium alloy material was immersed for 5 minutes in a treatment solution with a concentration of concentrated sulfuric acid of 50% or more and a temperature of 50°C or more, the surface was sufficiently activated.
It was possible to apply noble metal plating to titanium material or titanium alloy material with good adhesion. When the adhesive tape method and the grid test method were tested, the plating did not peel off. Furthermore, it was found that the activation process could be completed in a shorter time as the liquid temperature was raised. In the case of hydrochloric acid, it has been found that the surface of the titanium material or titanium alloy material can be sufficiently activated by immersing the titanium material or titanium alloy material in the treatment solution for 5 minutes, using concentrated hydrochloric acid and keeping the solution temperature at 60° C. or higher.

【0010】(実施例1)チタン合金製のスプーンを用
意し、第1前処理としてトリクロロエタンを含むアルカ
リ洗浄液にこれを浸漬し、超音波を用いて脱脂した。ス
プーンを充分に水洗した後、第2前処理として硝酸及び
弗酸からなる化学研磨液に1〜2分間浸漬し、スプーン
の酸化被膜を除去した。充分に水洗後、第3前処理とし
て表面の活性化を行った。濃硫酸を50%以上含有し、
60℃に加温した処理液にスプーンを5分間浸漬した。 水洗後、光沢スルファミン酸ニッケルメッキ浴にて陰極
電流密度3A/dm2 、20分間の光沢ニッケルメッ
キを施した。そしてストライク金メッキ浴にて金のフラ
ッシュメッキを行った。以上の如くにして光沢の美しい
金メッキのスプーンが得られた。
(Example 1) A titanium alloy spoon was prepared, and as a first pretreatment, it was immersed in an alkaline cleaning solution containing trichloroethane and degreased using ultrasonic waves. After thoroughly washing the spoon with water, the spoon was immersed in a chemical polishing solution consisting of nitric acid and hydrofluoric acid for 1 to 2 minutes as a second pretreatment to remove the oxide film on the spoon. After thorough washing with water, the surface was activated as a third pretreatment. Contains more than 50% concentrated sulfuric acid,
The spoon was immersed in the treatment solution heated to 60°C for 5 minutes. After washing with water, bright nickel plating was applied in a bright nickel sulfamate plating bath at a cathode current density of 3 A/dm2 for 20 minutes. Gold flash plating was then performed in a strike gold plating bath. As described above, a beautiful shiny gold-plated spoon was obtained.

【0011】(実施例2)チタン合金製のプレートを用
意し、実施例1と同様に第1前処理としてトリクロロエ
タンを含むアルカリ洗浄液にこれを浸漬し、超音波を用
いて脱脂した。プレートを充分に水洗した後、第2前処
理として硝酸及び弗酸からなる化学研磨液に1〜2分間
浸漬し、プレートの酸化被膜を除去した。充分に水洗後
、第3前処理としての表面の活性化を行った。濃塩酸か
らなる処理液を70℃に加温し、これにプレートを5分
間浸漬した。水洗後、光沢ワット浴にて陰極電流密度3
A/dm2 、15分間の光沢ニッケルメッキを行った
。そしてストライク金メッキ浴にて金のフラッシュメッ
キを行った。以上の如くにして光沢の美しい金メッキの
プレートが得られた。
(Example 2) A titanium alloy plate was prepared, and as in Example 1, it was immersed in an alkaline cleaning solution containing trichloroethane as a first pretreatment, and degreased using ultrasonic waves. After thoroughly washing the plate with water, the plate was immersed in a chemical polishing solution consisting of nitric acid and hydrofluoric acid for 1 to 2 minutes as a second pretreatment to remove the oxide film on the plate. After thorough washing with water, the surface was activated as a third pretreatment. A treatment solution consisting of concentrated hydrochloric acid was heated to 70° C., and the plate was immersed in it for 5 minutes. After washing with water, cathode current density 3 in gloss Watt bath
Bright nickel plating was performed at A/dm2 for 15 minutes. Gold flash plating was then performed in a strike gold plating bath. As described above, a gold-plated plate with beautiful luster was obtained.

【0012】(実施例3)チタン合金製のトランペット
のマウスピースを用意し、実施例1と同様に第1前処理
としてトリクロロエタンを含むアルカリ洗浄液にこれを
浸漬して脱脂し、充分に水洗した後、第2前処理として
硝酸及び弗酸からなる化学研磨液に1〜2分間浸漬し、
酸化被膜を除去した。充分に水洗後、第3前処理として
の表面の活性化を行った。濃硫酸を60%含有し、80
℃に加温した処理液にマウスピースを3分間浸漬した。 水洗後、光沢スルファミン酸ニッケルメッキ浴にて陰極
電流密度3A/dm2 、30分間の光沢ニッケルメッ
キを行った。そしてストライク金メッキ浴にて金のフラ
ッシュメッキを行った。以上の如くにして光沢の美しい
金メッキのマウスピースが得られた。
(Example 3) A trumpet mouthpiece made of titanium alloy was prepared, and in the same manner as in Example 1, it was immersed in an alkaline cleaning solution containing trichloroethane to degrease it as a first pretreatment, and then thoroughly rinsed with water. , immersed in a chemical polishing solution consisting of nitric acid and hydrofluoric acid for 1 to 2 minutes as a second pretreatment,
The oxide film was removed. After thorough washing with water, the surface was activated as a third pretreatment. Contains 60% concentrated sulfuric acid, 80%
The mouthpiece was immersed in the treatment solution heated to ℃ for 3 minutes. After washing with water, bright nickel plating was performed in a bright nickel sulfamate plating bath at a cathode current density of 3 A/dm2 for 30 minutes. Gold flash plating was then performed in a strike gold plating bath. As described above, a beautiful glossy gold-plated mouthpiece was obtained.

【0013】上述の実施例1、2及び3のチタン系製品
夫々に粘着テープ法及び碁盤目テスト法の試験を実施し
た場合、何れの製品にもメッキの剥離は見られなかった
。また、JIS  H8504による曲げ試験(180
度)、熱試験(300℃から放冷)及び熱衝撃試験(2
50℃から急冷)を実施したが何れの製品もメッキの膨
れ及び剥がれはなかった。なお、上述の実施例において
は、本発明をスプーン、プレート及びマウスピースに適
用した場合につき説明しているが何らこれに限定される
ものではなく、チタン系素材の装身具等他の製品にも適
用し得ることは言うまでもない。さらに上述の実施例に
おいては貴金属メッキとして金メッキに適用した場合に
つき説明しているが何らこれに限定されるものではなく
、他の貴金属メッキにも適用することができる。
When the titanium-based products of Examples 1, 2, and 3 were tested using the adhesive tape method and the grid test method, no peeling of the plating was observed in any of the products. In addition, bending test (180
degree), thermal test (cooling from 300℃), and thermal shock test (2 degrees
Although the products were rapidly cooled from 50°C, there was no blistering or peeling of the plating on any of the products. In addition, in the above-mentioned example, the case where the present invention is applied to a spoon, a plate, and a mouthpiece is explained, but it is not limited to these in any way, and it can also be applied to other products such as accessories made of titanium-based materials. It goes without saying that it can be done. Further, in the above-mentioned embodiments, the case where the present invention is applied to gold plating as the noble metal plating is explained, but the present invention is not limited to this in any way, and can be applied to other noble metal plating.

【0014】[0014]

【発明の効果】以上の如く、本発明においてはメッキの
前処理として、弗化水素を含有する処理液にチタン材又
はチタン合金材を浸漬して化学研磨し、次に強酸を50
%以上含有する処理液を加温し、これに浸漬して表面を
活性化しているので、密着性よく、確実に効率よく貴金
属メッキを施すことができる。そして光沢ニッケルメッ
キを施した上に貴金属メッキを施すことができるので、
貴金属メッキ量を少なくして光沢よく、安価に仕上げる
ことができる。さらに、チタン系素材が有する軽量性及
び耐食性を損なうことなく、貴金属が有する美しい外観
、色調を付与したメッキ製品を安価に提供できる等、本
発明は優れた効果を奏するものである。
As described above, in the present invention, as a pretreatment for plating, a titanium material or a titanium alloy material is immersed in a treatment solution containing hydrogen fluoride for chemical polishing, and then a strong acid is
Since the surface is activated by heating the processing solution containing % or more and immersing it in it, noble metal plating can be performed reliably and efficiently with good adhesion. And since it is possible to apply precious metal plating on top of bright nickel plating,
By reducing the amount of precious metal plating, a high-gloss finish can be achieved at low cost. Further, the present invention has excellent effects such as being able to provide plated products with the beautiful appearance and color tone of precious metals at low cost without sacrificing the light weight and corrosion resistance of titanium-based materials.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】  メッキの前処理として、弗化水素を含
有する処理液にチタン材又はチタン合金材を浸漬して化
学研磨し、次に強酸を50%以上含有する処理液を加温
し、これに浸漬して表面を活性化することを特徴とする
チタン材又はチタン合金材への貴金属メッキ方法。
Claim 1: As a pretreatment for plating, a titanium material or a titanium alloy material is immersed in a treatment solution containing hydrogen fluoride for chemical polishing, and then a treatment solution containing 50% or more of a strong acid is heated, A method for plating a precious metal on a titanium material or a titanium alloy material, the method comprising immersing the material in this to activate the surface.
【請求項2】  活性化した表面に下地メッキとしての
光沢ニッケルメッキを施すことを特徴とする請求項1記
載のチタン材又はチタン合金材への貴金属メッキ方法。
2. The noble metal plating method for titanium material or titanium alloy material according to claim 1, wherein bright nickel plating is applied as base plating to the activated surface.
JP1402591A 1991-01-12 1991-01-12 Method for plating titanium or titanium alloy material with noble metal Pending JPH04289175A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1402591A JPH04289175A (en) 1991-01-12 1991-01-12 Method for plating titanium or titanium alloy material with noble metal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1402591A JPH04289175A (en) 1991-01-12 1991-01-12 Method for plating titanium or titanium alloy material with noble metal

Publications (1)

Publication Number Publication Date
JPH04289175A true JPH04289175A (en) 1992-10-14

Family

ID=11849638

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1402591A Pending JPH04289175A (en) 1991-01-12 1991-01-12 Method for plating titanium or titanium alloy material with noble metal

Country Status (1)

Country Link
JP (1) JPH04289175A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1125196C (en) * 1999-09-28 2003-10-22 香港生产力促进局 Surface activating process of Ti and Ti alloy for bright electroplating

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50819A (en) * 1973-04-30 1975-01-07
JPS51148631A (en) * 1975-06-17 1976-12-21 Toko Inc Method of golddplating titanium
JPS59162296A (en) * 1983-03-05 1984-09-13 Kimura Kinzoku Kogyo Kk Method for plating titanium material with noble metal
JPS61295380A (en) * 1985-06-21 1986-12-26 Tanaka Kikinzoku Kogyo Kk Method for plating ornament

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50819A (en) * 1973-04-30 1975-01-07
JPS51148631A (en) * 1975-06-17 1976-12-21 Toko Inc Method of golddplating titanium
JPS59162296A (en) * 1983-03-05 1984-09-13 Kimura Kinzoku Kogyo Kk Method for plating titanium material with noble metal
JPS61295380A (en) * 1985-06-21 1986-12-26 Tanaka Kikinzoku Kogyo Kk Method for plating ornament

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1125196C (en) * 1999-09-28 2003-10-22 香港生产力促进局 Surface activating process of Ti and Ti alloy for bright electroplating

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