JPH0811820B2 - Plating agent for iron-based secondary processed products - Google Patents
Plating agent for iron-based secondary processed productsInfo
- Publication number
- JPH0811820B2 JPH0811820B2 JP29925986A JP29925986A JPH0811820B2 JP H0811820 B2 JPH0811820 B2 JP H0811820B2 JP 29925986 A JP29925986 A JP 29925986A JP 29925986 A JP29925986 A JP 29925986A JP H0811820 B2 JPH0811820 B2 JP H0811820B2
- Authority
- JP
- Japan
- Prior art keywords
- plating
- plating agent
- iron
- product
- plated
- 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 - Lifetime
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- Coating With Molten Metal (AREA)
Description
【発明の詳細な説明】 （イ）産業上の利用分野 この発明は、亜鉛−錫系のメッキ剤に関し、特に鉄系
二次加工品のメッキに有効に使用されるメッキ剤に関す
る。TECHNICAL FIELD The present invention relates to a zinc-tin based plating agent, and particularly to a plating agent effectively used for plating an iron-based secondary processed product.
（ロ）従来の技術とその問題点 従来から鉄鋼材料にメッキを施し耐食性・加工性・平
滑性・外観性等の性能を付与することは種々知られてい
る。(B) Conventional technology and its problems It has been conventionally known that a steel material is plated to give performances such as corrosion resistance, workability, smoothness and appearance.
すなわち、鉄鋼材料の用途や付与すべき性能に応じ、
電気メッキ法や溶融メッキ法等の手段が適宜選択され、
それなりにメッキによる効果を得ている。That is, depending on the application of the steel material and the performance to be imparted,
Means such as electroplating method and hot dipping method are appropriately selected,
As a result, the effect of plating is obtained.
溶融メッキ法の従来の技術の中で、最もこの発明に近
いものとして特公昭52−19531号がある。これはZn3〜97
％,Sn97〜３％からなるメッキ浴に0.005〜0.3％のAlを
添加し、この浴で鋼板・棒・パイプ等一次加工品にメッ
キを施す技術である。Among the conventional techniques of hot dipping, Japanese Patent Publication No. 52-19531 is the closest to the present invention. This is Zn3 ~ 97
%, Sn 97 to 3%, 0.005 to 0.3% of Al is added to the plating bath, and the steel plate, rod, pipe and other primary processed products are plated with this bath.
しかし、この技術に開示されるメッキ浴組成では、鋼
板・鋼線等、非酸化性雰囲気での連続メッキの可能な、
いわゆる一次加工品の鉄鋼材料について適用可能なもの
であり、大気中で通常のフラックスを用いて行なう、形
状や表面が複雑な二次加工品の溶融メッキ法としては、
工業的に採用困難なものである。However, the plating bath composition disclosed in this technology enables continuous plating in a non-oxidizing atmosphere such as steel plate and steel wire.
It is applicable to so-called primary processed steel materials, and as a hot-dip method for secondary processed products with complicated shapes and surfaces, which is performed using ordinary flux in the atmosphere,
It is industrially difficult to adopt.
これはこの発明の発明者らの研究によれば、アルミニ
ウムの添加量が高いため、メッキ浴表面のアルミニウム
酸化物の生成により漏れ不良が生じ、例えばボルトネジ
部のネジ底にネジ形状通りにメッキされず渡りができる
という不メッキが発生することによることが判明した。According to the research conducted by the inventors of the present invention, this is because a large amount of aluminum is added, so that a leakage failure occurs due to the generation of aluminum oxide on the surface of the plating bath. It was found to be due to the non-plating that could be passed without interruption.
このように、上記従来の技術では、鉄鋼材料（素材）
へのメッキはできても、近年でのユーザーからの厳しい
要求に応じられなくなっている。なかでも自動車業界に
おいては、特に輸出車において足まわり部品の耐塩害性
が問題となり、ネジ類、プレス品等について、より耐塩
水性、メッキ後のネジ精度共に優れた表面処理（メッ
キ）が求められている。Thus, in the above-mentioned conventional technology, the steel material (material)
Although it can be plated, it is no longer possible to meet the strict demands of users in recent years. Particularly in the automobile industry, salt damage resistance of suspension parts becomes a problem especially in exported cars, and surface treatment (plating) is required for screws, pressed products, etc., which are more salt water resistant and have better screw accuracy after plating. ing.
現在のところ耐塩水性、ネジ精度共に優れた表面処理
としてダクロタイズド処理という亜鉛−クロム酸の複合
皮膜処理があり、自動車業界においてもかなりの範囲で
採用されつつあるが、その皮膜が密着強度に乏しく、ま
た屋外耐候性も乏しいため、いまだに本採用には至って
いない。At present, there is a zinc-chromic acid composite film treatment called dacrotized treatment as a surface treatment excellent in both salt water resistance and screw accuracy, and it is being adopted in a considerable range in the automobile industry, but the film has poor adhesion strength, In addition, since it has poor outdoor weather resistance, it has not yet been adopted for this purpose.
一方電気メッキ業界においては、これらの要求に答え
るものとして、亜鉛−錫、亜鉛−ニッケル、亜鉛−鉄等
の合金メッキ法が開発され、性能的には一応の評価を受
けているものの、電気的に『カゲ』になる部分に不メッ
キ部を生じるという電気メッキ法における致命的欠陥は
避けられず、また処理設備費が高いこと、メッキ浴管理
が困難なことからコストアップが避け難く、これもまた
本格採用を難しくしている。On the other hand, in the electroplating industry, an alloy plating method of zinc-tin, zinc-nickel, zinc-iron, etc. has been developed to meet these requirements, and although the performance has been tentatively evaluated, the electrical plating The fatal defect in the electroplating method that an unplated part is generated in the part that becomes a "kage" is unavoidable, and the cost of the processing equipment is high, and it is difficult to manage the plating bath, so it is difficult to increase the cost. In addition, it is difficult for full-scale adoption.
また、水道業界においては、近年水質の悪化と共に、
従来より使用されている溶融亜鉛メッキパイプ、及び継
手の内面の防錆が問題となっている。その一つは亜鉛の
溶出による白濁水の発生であり、もう一つは溶融亜鉛メ
ッキにネジ精度がないため、メッキ後、ネジ切り加工を
施すので、ネジ部からの鉄錆の溶出による、いわゆる
『赤水』の発生を生じることである。Also, in the water industry, with the deterioration of water quality in recent years,
Corrosion prevention of the hot-dip galvanized pipe and the inner surface of the joint which has been used conventionally has been a problem. One of them is the generation of cloudy water due to the elution of zinc, and the other is the so-called hot-dip galvanizing, which has no screw precision. It is the occurrence of "red water".
更に、小物組立品、例えば建設用足場パイプクランプ
継手等のように組立てられた後、全体をメッキするもの
にあっては、隙間までお互いがくっつかないよう、所定
の間隙を保ったままでメッキする必要があり、これらの
ものは、電気メッキ法では勿論、溶融メッキ法でも極め
て困難な製品であった。Furthermore, in the case of a small assembly, such as a scaffolding pipe clamp joint for construction that is assembled and then plated as a whole, it is necessary to plate with a certain gap so that the gaps do not stick to each other. However, these products are extremely difficult products not only by the electroplating method but also by the hot dipping method.
このように従来の技術では優秀なメッキ性能を有し、
なおかつネジ精度等寸法精度が保持され、小物組立品等
隙間までメッキするという要求に応じられない問題点が
あった。In this way, the conventional technology has excellent plating performance,
In addition, there is a problem that dimensional accuracy such as screw accuracy is maintained, and it is not possible to meet the demand for plating even a gap such as a small assembly.
（ハ）問題点を解決するための手段と作用 この発明はこれらの問題点を解消するため種々研究の
結果、亜鉛−錫とからなるメッキ剤にアルミニウムを0.
0005〜0.004％添加した浴で、鉄系二次加工品を溶融メ
ッキすることで膜厚精度の優れた高耐食性で美しいメッ
キができること見出してなされたものである。具体的に
は２〜89％の亜鉛と98〜11％の錫とからなるメッキ剤の
総量に対して、0.0005〜0.004％のアルミニウムを添加
してなることを特徴とする鉄系二次加工品用メッキ剤で
ある。(C) Means and Actions for Solving Problems As a result of various studies to solve these problems, according to the present invention, as a plating agent composed of zinc-tin, aluminum is added to 0.1.
[0005] It was made by the finding that hot-dip iron-based secondary processed products can be hot-dipped in a bath containing 0.005% to 0.004% to achieve beautiful corrosion-resistant plating with excellent film thickness accuracy. Specifically, 0.0005 to 0.004% of aluminum is added to the total amount of the plating agent consisting of 2 to 89% of zinc and 98 to 11% of tin. Plating agent.
ここで重要なことは、この発明のメッキ剤は単なる鉄
鋼材料を対象としているのではなく、鉄系二次加工品を
対象としていることである。What is important here is that the plating agent of the present invention is not intended for merely steel materials, but for iron-based secondary processed products.
この発明でいう鉄系二次加工品とは、鉄を主成分とす
る材料から作られた一次成形品、成形棒、成形管、押出
品等を分離し、必要な処理を行って最終的な形態になっ
たものをいう。例えばボルト、ナット、管継手、クラン
プ等表面形状が単なる平面ではなく曲り部があるもの、
複雑な形状のもの、粗物などが挙げられる。The iron-based secondary processed product as referred to in the present invention means that a primary molded product made of a material containing iron as a main component, a molding rod, a molded tube, an extruded product, etc. It is a form. For example, bolts, nuts, pipe fittings, clamps, etc. whose surface shape is not a flat surface but has a bent portion,
Examples include complicated shapes and coarse materials.
この発明のメッキ剤は、かかる鉄系二次加工品に使用
することを意図したもので、メッキ後加工することを前
提として考えられたものとは異なる。従って、所謂一次
加工品に所定のメッキ効果を与えても、それが加工され
るとキズが付き、複雑な曲げ加工により密着性が損われ
たりするが、この発明のメッキ剤ではかかる問題が生じ
ない。加うるに、この発明のメッキ剤を用いると複雑な
形状に合わせた均一で美しいメッキが得られるし、狭い
隙間といえどもその隙間を保った状態で両側に所定のメ
ッキを施すことができる。The plating agent of the present invention is intended to be used for such iron-based secondary processed products, and is different from that which is considered on the premise of processing after plating. Therefore, even if a so-called primary processed product is given a predetermined plating effect, it will be scratched when it is processed and the adhesion will be impaired due to complicated bending, but the plating agent of the present invention causes such a problem. Absent. In addition, when the plating agent of the present invention is used, uniform and beautiful plating matching a complicated shape can be obtained, and even a narrow gap can be subjected to predetermined plating on both sides while maintaining the gap.
この発明によるメッキ剤は、従来の溶融亜鉛メッキ法
などと同様に前処理後大気中でフラックスをもちいて行
なういわゆる『どぶ漬け』法で適用できる。The plating agent according to the present invention can be applied by the so-called "dough pickling" method in which flux is used in the atmosphere after pretreatment as in the conventional hot dip galvanizing method.
そして、この発明のメッキ剤の組成は、亜鉛の２〜89
％に対して錫を11〜98％で、アルミニウムの添加量は亜
鉛−錫の総量に対して0.0005〜0.004％、好ましくは0.0
01〜0.004％である（％は重量％を指す。以下同じ）。The composition of the plating agent of the present invention is 2 to 89% of zinc.
%, Tin is 11 to 98%, and the amount of aluminum added is 0.0005 to 0.004%, preferably 0.0 to 0.004% with respect to the total amount of zinc-tin.
It is from 01 to 0.004% (% indicates% by weight. The same applies hereinafter).
このアルミニウムの添加量は、重要であり、0.0002％
位でも一応メッキはできるが外観が悪くなり、0.004％
より多くなると浴液が『ネト付く』感じとなり、狭い隙
間に『さらり』と浴液がまわらなくなり、メッキ面同志
がくっつき易くなる。The amount of aluminum added is important, 0.0002%
Although plating can be done for a while, the appearance becomes poor and 0.004%
When the amount is larger, the bath liquid feels like "sticky", and when it is "dry" in a narrow gap, the bath liquid does not spread, and the plating surfaces tend to stick together.
この発明のメッキ剤の使用の温度、時間等は、通常の
溶融メッキ法のそれが利用できる。メッキ厚みも対象の
形状や使用される環境等により調整され、それぞれの形
状、メッキ厚で有効な性能を達することができる。With respect to the temperature, time, etc. of use of the plating agent of the present invention, that of the usual hot dipping method can be used. The plating thickness is also adjusted according to the shape of the target and the environment in which it is used, and effective performance can be achieved with each shape and plating thickness.
次にこの発明を実施例を用いて説明するが、これによ
って限定されるものではない。Next, the present invention will be described with reference to examples, but the present invention is not limited thereto.
実施例１ Sn 92％ Zn 8％ Al 0.003％ からなる合金メッキ剤を用いて、M10×50mmのボルトを
フラックス（塩化亜鉛−塩化アンモニウム系フラック
ス）に浸漬後、270℃で１分間上記のメッキ剤からなる
浴に浸漬の後、たれ切り、水冷することにより、付着量
76g/m2の均一で美しいメッキ品が得られ、ナットのカン
合も良好であった。Example 1 An alloy plating agent consisting of Sn 92% Zn 8% Al 0.003% was used to immerse a M10 × 50 mm bolt in a flux (zinc chloride-ammonium chloride flux) and then at 270 ° C. for 1 minute. After soaking in a bath consisting of
A uniform and beautiful plated product of 76 g / m 2 was obtained, and the nut fit was also good.
この製品について、塩水噴霧試験をおこなったとこ
ろ、800時間経過後も赤サビは発生しなかった。When a salt spray test was conducted on this product, red rust did not occur even after 800 hours had passed.
比較例１ Sn 92％ Zn 8％ Al 0.01％ からなる合金メッキ剤を用いて、M10×50mmのボルトを
同様にメッキしたところ、不メッキを生じた。Comparative Example 1 When an M10 × 50 mm bolt was similarly plated using an alloy plating agent consisting of Sn 92% Zn 8% Al 0.01%, no plating occurred.
比較例２ 同様のボルトに溶融亜鉛メッキを施したところ、付着
量255g/m2のメッキが得られ、ナットが全くカン合しな
かった。Comparative Example 2 When the same bolt was subjected to hot dip galvanization, a plating amount of 255 g / m 2 was obtained and the nut did not fit at all.
この製品について、塩水噴霧試験をおこなったとこ
ろ、240時間で赤サビを発生した。When a salt spray test was conducted on this product, red rust was generated in 240 hours.
実施例２ Sn 60％ Zn 40％ Al 0.003％ からなる合金メッキ剤を用いて、1/2インチのマリアブ
ルソケットをフラックス（塩化亜鉛−塩化アンモニウム
系フラックス）に浸漬後、380℃で１分間上記メッキ剤
の浴に浸漬の後、たれ切り、水冷することにより、付着
量105g/m2の均一で美しいメッキ品が得られた。この製
品について塩水噴霧試験を行ったところ、500時間経過
後も赤サビは発生しなかった。Example 2 A 1/2 inch variable socket was dipped in a flux (zinc chloride-ammonium chloride based flux) using an alloy plating agent consisting of Sn 60% Zn 40% Al 0.003%, and then at 380 ° C. for 1 minute. After dipping in a bath of plating agent, cutting off with sag and cooling with water, a uniform and beautiful plated product with an adhesion amount of 105 g / m 2 was obtained. When a salt spray test was conducted on this product, red rust did not occur even after 500 hours had elapsed.
比較例３ Sn 60％ Zn 40％ Al 0.02％ からなる合金メッキ剤を用いて、1/2インチのマリアブ
ルソケットを同様にメッキしたところ、不メッキを生じ
た。Comparative Example 3 When a 1/2 inch variable socket was similarly plated using an alloy plating agent consisting of Sn 60% Zn 40% Al 0.02%, no plating occurred.
比較例４ Sn 10％ Zn 90％ Al 0.003％ からなる合金メッキ剤を用いて、1/2インチのマリアブ
ルソケットを同様にメッキしたところ、付着量380g/m2
のメッキ品が得られ、この製品について塩水噴霧試験を
おこなったところ360時間で赤サビを発生した。Comparative Example 4 A 1/2 inch variable socket was similarly plated with an alloy plating agent consisting of Sn 10% Zn 90% Al 0.003%, and the deposition amount was 380 g / m 2
When a salt spray test was conducted on this product, red rust was generated in 360 hours.
実施例３ Sn 60％ Zn 40％ Al 0.004％ からなる合金メッキ剤を用いて、M6の自動車用小ネジを
フラックス（塩化亜鉛−塩化アンモニウム系フラック
ス）に浸漬後、400℃で１分間メッキを行い、たれ切
り、水冷することにより、付着量85g/m2の均一で美しい
メッキ品が得られ、ナットのカン合も良好であった。Example 3 Using an alloy plating agent consisting of Sn 60% Zn 40% Al 0.004%, M6 small machine screws for automobiles were dipped in flux (zinc chloride-ammonium chloride flux) and then plated at 400 ° C for 1 minute. A uniform and beautiful plated product with an adhered amount of 85 g / m 2 was obtained by dripping off, and water cooling, and the nut fit was also good.
この製品について、塩水噴霧試験を行ったところ、80
0時間経過後も赤サビは、発生しなかった。When a salt spray test was conducted on this product, it was found to be 80
Red rust did not occur even after 0 hour.
比較例５ 同様の小ネジに溶融亜鉛メッキを施したところ、付着
量450g/m2のメッキ品が得られ、ネジは全くカン合しな
かった。Comparative Example 5 When the same small screw was subjected to hot dip galvanization, a plated product with an adhesion amount of 450 g / m 2 was obtained, and the screw did not fit at all.
この製品について塩水噴霧試験をおこなったところ、
240時間で赤サビを発した。When a salt spray test was conducted on this product,
I emitted red rust in 240 hours.
実施例４ Sn 94％ Zn 6％ Al 0.0005％ からなる合金メッキ剤を用いて、M6の自動車用小ネジを
フラックス（塩化亜鉛−塩化アンモニウム系フラック
ス）に浸漬後、300℃で１分間メッキを行い、たれ切
り、水冷することにより、付着量62g/m2の均一で美しい
メッキ品が得られ、ナットのカン合も良好であった。Example 4 Using an alloy plating agent consisting of Sn 94% Zn 6% Al 0.0005%, an M6 small machine screw was immersed in a flux (zinc chloride-ammonium chloride flux) and then plated at 300 ° C for 1 minute. The product was evenly sliced and cooled with water to obtain a uniform and beautiful plated product with an adhesion amount of 62 g / m 2 , and the nut fit was also good.
この製品について、塩水噴霧試験を行ったところ、50
0時間経過後も赤サビは、発生しなかった。A salt spray test was conducted on this product,
Red rust did not occur even after 0 hour.
（ニ）発明の効果 これらの実施例及び比較例から、明確なように、この
発明の方法によりメッキを行ったものは、平滑性・外観
の優秀性はもちろん、耐塩水500時間以上の耐触性及び
均一な膜厚（20μ以下又は150g/m2以下）精度が格段に
優れている。(D) Effects of the invention As is clear from these Examples and Comparative Examples, the products plated by the method of the present invention have excellent smoothness and appearance as well as resistance to contact with salt water for 500 hours or more. And uniform film thickness (20μ or less or 150g / m 2 or less) accuracy is remarkably excellent.
Claims (1)
メッキ剤の総量に対して、0.0005〜0.004％のアルミニ
ウムを添加してなることを特徴とする鉄系二次加工品用
メッキ剤。1. An iron-based secondary processing, characterized in that 0.0005 to 0.004% of aluminum is added to the total amount of a plating agent composed of 2 to 89% of zinc and 98 to 11% of tin. Plating agent for products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29925986A JPH0811820B2 (en) | 1986-12-15 | 1986-12-15 | Plating agent for iron-based secondary processed products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29925986A JPH0811820B2 (en) | 1986-12-15 | 1986-12-15 | Plating agent for iron-based secondary processed products |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63153253A JPS63153253A (en) | 1988-06-25 |
| JPH0811820B2 true JPH0811820B2 (en) | 1996-02-07 |
Family
ID=17870218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29925986A Expired - Lifetime JPH0811820B2 (en) | 1986-12-15 | 1986-12-15 | Plating agent for iron-based secondary processed products |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0811820B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5401586A (en) * | 1993-04-05 | 1995-03-28 | The Louis Berkman Company | Architectural material coating |
| ZA971076B (en) * | 1996-02-23 | 1997-08-25 | Union Miniere Sa | Hot-dip galvanizing bath and process. |
| JP3702870B2 (en) * | 2002-07-23 | 2005-10-05 | 三菱電機株式会社 | Box for air conditioning equipment and manufacturing method thereof |
| DE102013006388A1 (en) * | 2013-04-15 | 2014-10-16 | Zollern Bhw Gleitlager Gmbh & Co. Kg | Slide bearing alloy based on tin |
-
1986
- 1986-12-15 JP JP29925986A patent/JPH0811820B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63153253A (en) | 1988-06-25 |
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