JPH02194200A - Additive for plating bath - Google Patents
Additive for plating bathInfo
- Publication number
- JPH02194200A JPH02194200A JP1108989A JP1108989A JPH02194200A JP H02194200 A JPH02194200 A JP H02194200A JP 1108989 A JP1108989 A JP 1108989A JP 1108989 A JP1108989 A JP 1108989A JP H02194200 A JPH02194200 A JP H02194200A
- Authority
- JP
- Japan
- Prior art keywords
- additive
- plating
- pva
- film
- gelatin
- 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
- 238000007747 plating Methods 0.000 title claims abstract description 62
- 239000000654 additive Substances 0.000 title claims abstract description 35
- 230000000996 additive effect Effects 0.000 title claims abstract description 33
- 108010010803 Gelatin Proteins 0.000 claims abstract description 16
- 229920000159 gelatin Polymers 0.000 claims abstract description 16
- 239000008273 gelatin Substances 0.000 claims abstract description 16
- 235000019322 gelatine Nutrition 0.000 claims abstract description 16
- 235000011852 gelatine desserts Nutrition 0.000 claims abstract description 16
- 239000003292 glue Substances 0.000 claims abstract description 7
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 27
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 27
- 239000007864 aqueous solution Substances 0.000 claims description 9
- 238000009713 electroplating Methods 0.000 abstract description 3
- 239000004094 surface-active agent Substances 0.000 abstract description 3
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 17
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000000126 substance Substances 0.000 description 3
- 238000002845 discoloration Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- RILZRCJGXSFXNE-UHFFFAOYSA-N 2-[4-(trifluoromethoxy)phenyl]ethanol Chemical compound OCCC1=CC=C(OC(F)(F)F)C=C1 RILZRCJGXSFXNE-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- 229920001353 Dextrin Polymers 0.000 description 1
- 239000004375 Dextrin Substances 0.000 description 1
- 229920000084 Gum arabic Polymers 0.000 description 1
- 101100342332 Mus musculus Klf16 gene Proteins 0.000 description 1
- 241000978776 Senegalia senegal Species 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 235000010489 acacia gum Nutrition 0.000 description 1
- 239000000205 acacia gum Substances 0.000 description 1
- 125000003158 alcohol group Chemical group 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 235000019425 dextrin Nutrition 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000002659 electrodeposit Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- PIJPYDMVFNTHIP-UHFFFAOYSA-L lead sulfate Chemical compound [PbH4+2].[O-]S([O-])(=O)=O PIJPYDMVFNTHIP-UHFFFAOYSA-L 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
Landscapes
- Electroplating And Plating Baths Therefor (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、電気めっきのめっき浴に添加される添加剤に
関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an additive added to a plating bath for electroplating.
（従来の技術）
従来から金属の電気めっき処理は、めっき対象金属を陰
極とし、めっき膜として生成されるべき金属を陽極とし
てめっき浴中に浸漬し、陽極と陰極間に電圧を加えるこ
とにより成される。すなわち、陽極金属がめつき浴中に
溶解して金属イオンとなり；陰極側のめっき対象金属表
面に金属イオンが析出してめっき膜が生成される。(Prior art) Conventionally, electroplating of metals has been carried out by immersing the metal in a plating bath with the metal to be plated as the cathode and the metal to be formed as a plating film as the anode, and applying a voltage between the anode and the cathode. be done. That is, the anode metal dissolves in the plating bath and becomes metal ions; the metal ions precipitate on the surface of the metal to be plated on the cathode side, forming a plating film.
めっき浴の主成分としては、通常めっきする金属の塩を
硫酸塩、塩化物、シアン化物等の形で用い、めうき膜と
して微細で均一なめっきを得るための添加剤が添加され
る。この添加剤として、従来からにかわやゼラチン等の
有機物が用いられていた。The main components of the plating bath are usually salts of the metal to be plated in the form of sulfates, chlorides, cyanides, etc., and additives are added to obtain fine and uniform plating as a plating film. Conventionally, organic substances such as glue and gelatin have been used as this additive.
（発明が解決しようとする課題）
しかしながら上記した従来技術の場合には、めっき浴の
温度変化、ＰＨ変化によりゼラチン等が凝集してめっき
浴として使用できなくなることがあった。これは、にか
わやゼラチンが一種の誘導タンパク質であるために、微
量であれば水に溶けるが不安定でゾル状に成り易い性質
を有するからである。特に温水であれば低濃度（１％以
下）で溶解するが、めっき液の温度低下、ＰＨの変動等
により白濁状になり易く、この場合にはめっきが不可能
となってしまう。(Problems to be Solved by the Invention) However, in the case of the above-mentioned prior art, gelatin and the like may aggregate due to changes in the temperature and pH of the plating bath, making it impossible to use the bath as a plating bath. This is because glue and gelatin are a type of induced protein, and although they are soluble in water in trace amounts, they are unstable and tend to form a sol. Particularly in hot water, it dissolves at a low concentration (1% or less), but it tends to become cloudy due to a drop in the temperature of the plating solution, fluctuations in pH, etc., and in this case, plating becomes impossible.
本発明は上記し・た従来技術の課題を解決するためにな
されたもので、その目的とするところは、めっき膜を安
定して電析させ得るめっき浴添加剤を提供することにあ
る。The present invention was made to solve the problems of the prior art described above, and its purpose is to provide a plating bath additive that can stably electrodeposit a plating film.
（課題を解決するための手段）
上記目的を達成するために、本発明のめっき浴添加剤は
、添加剤本体をポリビニルアルコールの水溶液に溶解さ
せたものから構成した。(Means for Solving the Problems) In order to achieve the above object, the plating bath additive of the present invention is composed of an additive main body dissolved in an aqueous solution of polyvinyl alcohol.
添加剤本体はゼラチンまたはにかわであることが望まし
い。Preferably, the additive body is gelatin or glue.
（作 用）
而して、ポリビニルアルコールの水溶液中にゼラチンや
にかわ等の添加剤本体を溶解することで、ポリビニルア
ルコールが界面活性剤的機能を果し、添加剤本体とめっ
き液との相溶性が良くなり、添加剤本体がめつき液中に
均一状態に保持される。(Function) By dissolving the additive body such as gelatin or glue in an aqueous solution of polyvinyl alcohol, the polyvinyl alcohol functions as a surfactant and improves the compatibility between the additive body and the plating solution. The additive body is maintained in a uniform state in the plating solution.
さらに、生成されためっき膜表面にポリビニルアルコー
ルの皮膜が生成され、めっき膜が外部環境から保護され
る。Furthermore, a polyvinyl alcohol film is formed on the surface of the formed plating film, thereby protecting the plating film from the external environment.
（実施例）
以下に本発明を図示の実施例に基づいて説明する。第１
図には本発明の一実施例に係るめっき浴添加剤をめっき
液に添加する状態を示している。(Example) The present invention will be explained below based on the illustrated example. 1st
The figure shows a state in which a plating bath additive according to an embodiment of the present invention is added to a plating solution.
すなわち、ポリビニルアルコール（以下ＰＶＡという）
の水溶液１中に所定量の添加剤本体としてのゼラチン２
を溶解して添加剤３を製造する。That is, polyvinyl alcohol (hereinafter referred to as PVA)
A predetermined amount of gelatin 2 as an additive body in an aqueous solution 1 of
Additive 3 is produced by dissolving.
添加剤本体としては、ゼラチンの他に、にかわ。In addition to gelatin, the main additives include glue.
アラビヤゴム、デキストリン、でんぷん等の有機物、あ
るいは珪酸ソーダ等の無機物等を用いることができる。Organic substances such as gum arabic, dextrin, and starch, or inorganic substances such as sodium silicate, etc. can be used.
ＰＶＡ水溶液１は、この実施例では５０％の濃度のもの
が用いられ、たとえば第２図に示す工程を経て作られる
。まず、第２図（ａ）に示すように、ＰＶＡ４を純水５
に少量づつ添加し、いわゆる「ままこ」が生じないよう
に純水中に均一に分散させる＝
次に、ＰＶＡ４が均一に水を含んで分散したら、第２図
（ロ）に示すように７０〜１００°Ｃに昇温させる。そ
して、そのまま一定時間経過すると、第２図（Ｃ）に示
すようにＰＶＡ４は水中に完全に溶解されてＰＶＡ水溶
液１ができる。The PVA aqueous solution 1 used in this example has a concentration of 50%, and is prepared, for example, through the steps shown in FIG. First, as shown in Fig. 2(a), PVA4 was mixed with 55% pure water.
Add it little by little and disperse it uniformly in pure water to avoid so-called "mamako" = Next, when PVA4 is evenly dispersed with water, it will be 70% as shown in Figure 2 (b). Raise the temperature to ~100°C. Then, after a certain period of time has passed, PVA 4 is completely dissolved in water to form a PVA aqueous solution 1, as shown in FIG. 2(C).
この実施例では、ＰＶＡ水溶液１ １００ｄにゼラチン
２を１０ｇ溶解して添加剤３とし、この添加剤３をめっ
き液に３０〜５０ｇ／Ｊ！の割合で添加した。In this example, 10 g of gelatin 2 was dissolved in 100 d of PVA aqueous solution 1 to obtain additive 3, and this additive 3 was added to the plating solution at a rate of 30 to 50 g/J! It was added at a ratio of
添加剤３はめっき液の使用回数（電解量）によって消費
されるので、適宜添加しなければならない、添加剤３の
必要添加量は、ハルセル試験を利用するようにすればよ
い。Since the additive 3 is consumed depending on the number of times the plating solution is used (the amount of electrolysis), the required amount of the additive 3 must be added as appropriate by using the Hull cell test.
めっき浴としては種々のめっき浴に適用可能で、あるが
、この実施例では鉛めっき浴、特にホウフッ化鉛めっき
浴に添加する場合について説明する。Although it can be applied to various plating baths, in this example, the case where it is added to a lead plating bath, particularly a lead borofluoride plating bath will be explained.
めっき液としては、鉛の硫酸塩や塩化物、シアン化物等
が用いられるが、この実施例では鉛濃度が１００〜１８
０ｇ／ｊ！のホウフッ化水素酸１０〜４０ｇ、ｌ！が用
いられている。そして、第３図に示すように、めっき液
６中に、めっき対象金属７を陰極とし、めっきすべき金
属８を陽極として浸漬し、この陰極と陽極間に電圧を加
える。めっき液６の温度としては３０〜４０ ’Ｃとし
、陰極電流密度を０．５〜３Ａ／ｄｒｒｆの条件下でめ
っきを行なった。Lead sulfate, chloride, cyanide, etc. are used as the plating solution, but in this example, the lead concentration was 100 to 18
0g/j! of 10-40 g of fluoroboric acid, l! is used. Then, as shown in FIG. 3, the metal to be plated 7 is used as a cathode and the metal 8 to be plated is used as an anode and immersed in a plating solution 6, and a voltage is applied between the cathode and the anode. The temperature of the plating solution 6 was 30 to 40'C, and plating was performed under the conditions of a cathode current density of 0.5 to 3 A/drrf.
このような添加剤を用いたことにより、ＰＶＡが界面活
性剤として機能し、ゼラチンとめっき液６との相溶性が
向上してゼラチンがめつき液中に均一に分散する。そし
て、めっき液としてのホウフッ化水素液に温度変化やＰ
Ｈ１変化が生じたとしても、ゼラチン等は凝集するよう
なことは無く安定した状態に保持され、むらの無い均一
なめっき膜を生成することができた。By using such an additive, PVA functions as a surfactant, improving the compatibility between gelatin and the plating solution 6, and dispersing gelatin uniformly in the plating solution. Then, temperature changes and P
Even if the H1 change occurred, gelatin etc. did not aggregate and was maintained in a stable state, making it possible to produce a uniform plating film without unevenness.
さらに、ＰＶＡは優れたフィルム形成能°および接着性
に優れているので、めっき液６中にＰＶＡ水溶液が混入
することにより、第４図に示すようにめっき処理後のめ
っき膜９表面にフィルム状に薄（残留してＰＶＡ皮膜１
０が生成される。このＰＶＡ皮膜１０の水分を揮発させ
ることにより強固な保護皮膜となる。ＰＶＡ皮膜１０の
生成は、たとえばめっき処理後、めっき液６からめつき
製品を引き上げた後に熱風乾燥させ、めっき膜９表面に
付着したＰＶＡから水分を揮発させることにより行なう
、このＰＶＡ皮膜１０は透明でめっき膜９表面の色調は
ＰＶＡ皮膜１０を通じて外部から目視可能である。そし
て、ＰＶＡ皮膜１０によってめっき膜９表面が環境から
保護され、めっき膜９表面の変色シミの発生度合が低下
するという効果も得られた。Furthermore, since PVA has excellent film-forming ability and excellent adhesion, when the PVA aqueous solution is mixed into the plating solution 6, a film-like layer is formed on the surface of the plating film 9 after plating, as shown in FIG. thin (remaining PVA film 1)
0 is generated. By volatilizing the moisture in this PVA film 10, it becomes a strong protective film. The PVA film 10 is generated by, for example, removing the plated product from the plating solution 6 after plating and drying it with hot air to evaporate water from the PVA attached to the surface of the plating film 9. This PVA film 10 is transparent. The color tone of the surface of the plating film 9 is visible from the outside through the PVA film 10. Furthermore, the PVA film 10 protected the surface of the plating film 9 from the environment, and the effect of reducing the degree of discoloration and staining on the surface of the plating film 9 was also obtained.
（発明の効果）
本発明は、以上の構成および作用を有するもので、ポリ
ビニルアルコール水溶液にゼラチンを溶解してめっき浴
添加剤としたので、ゼラチン等とめっき液との間の相溶
性が良くなり、めっき膜を安定して生成することができ
、生産能率の向上を図ることができる。(Effects of the Invention) The present invention has the above-described structure and operation, and since gelatin is dissolved in an aqueous polyvinyl alcohol solution and used as a plating bath additive, the compatibility between gelatin, etc. and the plating solution is improved. , a plating film can be stably produced, and production efficiency can be improved.
また、生成されためっき膜表面にポリビニルアルコール
の皮膜が生成され、めっき膜の変色等を防止することが
できめっき膜の品質向上を図ることができる。In addition, a polyvinyl alcohol film is formed on the surface of the formed plating film, which can prevent discoloration of the plating film and improve the quality of the plating film.
第１図（ａ）、■）は本発明の一実施例に係るめっき浴
添加剤の製造工程の一例を示す工程図、第２図（ａ）乃
至（Ｃ）は第１図の添加剤の製造に用いるＰＶＡ水溶液
の製造工程の一例を示す工程図、第３図はめっき溶の基
本的構成を示す断面図、第４図は生成されためっき膜の
概略断面図である。
符 号 の 説 明
１・・・ＰＶＡ水溶液 ２・・・ゼラチン（添加剤本体
）３・・・添加剤
４・・・ＰＶＡ（ポリビニルアルコール）６・・・めっ
き液 ９・・・めっき膜１０・・・ＰＶＡ皮膜Figures 1 (a) and (■) are process diagrams showing an example of the manufacturing process of a plating bath additive according to an embodiment of the present invention, and Figures 2 (a) to (C) are FIG. 3 is a sectional view showing the basic structure of the plating solution, and FIG. 4 is a schematic sectional view of the produced plating film. Explanation of symbols 1... PVA aqueous solution 2... Gelatin (additive main body) 3... Additive 4... PVA (polyvinyl alcohol) 6... Plating solution 9... Plating film 10.・PVA film
Claims (2)
解したことを特徴とするめっき浴添加剤。(1) A plating bath additive characterized in that the additive itself is dissolved in an aqueous solution of polyvinyl alcohol.
１に記載のめっき浴添加剤。(2) The plating bath additive according to claim 1, wherein the main body of the additive is gelatin or glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1108989A JPH02194200A (en) | 1989-01-20 | 1989-01-20 | Additive for plating bath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1108989A JPH02194200A (en) | 1989-01-20 | 1989-01-20 | Additive for plating bath |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02194200A true JPH02194200A (en) | 1990-07-31 |
Family
ID=11768260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1108989A Pending JPH02194200A (en) | 1989-01-20 | 1989-01-20 | Additive for plating bath |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02194200A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013040371A (en) * | 2011-08-15 | 2013-02-28 | Pan Pacific Copper Co Ltd | Apparatus and method of producing metal |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5429977A (en) * | 1977-08-10 | 1979-03-06 | Hitachi Ltd | Detection system for position |
| JPS5611756A (en) * | 1979-07-10 | 1981-02-05 | San Ei Chem Ind Ltd | Frozen food |
| JPS59596A (en) * | 1982-06-24 | 1984-01-05 | Mitsubishi Electric Corp | In-line pump apparatus |
-
1989
- 1989-01-20 JP JP1108989A patent/JPH02194200A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5429977A (en) * | 1977-08-10 | 1979-03-06 | Hitachi Ltd | Detection system for position |
| JPS5611756A (en) * | 1979-07-10 | 1981-02-05 | San Ei Chem Ind Ltd | Frozen food |
| JPS59596A (en) * | 1982-06-24 | 1984-01-05 | Mitsubishi Electric Corp | In-line pump apparatus |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013040371A (en) * | 2011-08-15 | 2013-02-28 | Pan Pacific Copper Co Ltd | Apparatus and method of producing metal |
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