WO2006025176A1 - Hot-dip galvanizing - Google Patents

Hot-dip galvanizing Download PDF

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Publication number
WO2006025176A1
WO2006025176A1 PCT/JP2005/014106 JP2005014106W WO2006025176A1 WO 2006025176 A1 WO2006025176 A1 WO 2006025176A1 JP 2005014106 W JP2005014106 W JP 2005014106W WO 2006025176 A1 WO2006025176 A1 WO 2006025176A1
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Prior art keywords
component
plating
mass
layer
dip galvanizing
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PCT/JP2005/014106
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French (fr)
Japanese (ja)
Inventor
Sekizo Kawasaki
Shinichi Yabuta
Yoshiharu Kosaka
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Ck Metals Co., Ltd.
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Priority to JP2006531485A priority Critical patent/JP4163232B2/en
Publication of WO2006025176A1 publication Critical patent/WO2006025176A1/en

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    • 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
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/06—Zinc or cadmium or alloys based thereon

Definitions

  • the present invention relates to a molten zinc plating, and more particularly to a lead-free and cadmium-less molten zinc plating and a plating bath thereof.
  • Molten zinc plating is excellent in corrosion resistance and adhesion, and is inexpensive, so that it is widely applied to steel materials.
  • the zinc bullion for molten zinc plating is a distilled zinc bullion CFIS H 2107, a kind), which usually contains 1-2% by mass of Pb component and Cd component. Include in the order of ⁇ m level!
  • Distilled zinc bullion for molten zinc plating contains a large amount of Cd components as impurities.
  • Japanese Patent Application Laid-Open No. 2004-11019 discloses a technique in which a Bi plating layer is interposed between a molten zinc plating layer and a steel material, but the zinc plating layer does not contain Bi.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2004-11019
  • the present invention aims to provide a Bi-containing molten zinc plating technique that can be made Pb-less and Cd-less in a molten zinc plating layer and has excellent plating quality. And Means for solving the problem
  • the plating layer can be obtained with excellent corrosion resistance and good appearance quality without adding the Pb component.
  • the Bi component content in the plating layer can be controlled by controlling the plating bath composition, melting plating conditions, etc., and the maximum amount of Bi component that can be dissolved in the molten zinc is determined by the bath temperature.
  • a molten bismuth layer is formed on the bottom of the kettle to protect the iron kettle from zinc erosion.
  • the immersion time of the material to be plated (steel material, etc.) in the plating bath depends on the cooling rate after removal, and the amount of Bi component in the plating layer also varies. Since the charging temperature into the bath is lower than the bath temperature, the Bi component in the plating layer often shows a lower value than the Bi component in the plating bath. It should be contained within the range of mass%.
  • the Pb component in the molten zinc plating layer should be 0.1 mass% or less and the Cd component should be lOOppm or less in order to reduce lead and cadmium. It is preferable that the Pb component in the plating layer is 0.01% by mass or less and the Cd component is 10 ppm or less.
  • the Pb component of the plating bath is 0.1% by mass or less and the Cd component is lOOppm or less.
  • the zinc bullion is zinc bullion that has undergone a refining process by electrolysis.
  • Fig. 1 shows an example of a bath composition of a Metsu bath.
  • FIG. 2 shows the results of component analysis in the molten zinc plating layer obtained using the plating bath shown in FIG.
  • FIG. 5 An example of a cross-sectional photograph of a plating film is shown.
  • Electrozinc bullion is melted in an iron pan, bismuth (Bi) is added to a predetermined ratio, and each plating bath shown in the table of Fig. 1 is built.
  • Table 2 shows the values obtained by immersing a 1.2 mm thick steel plate for 1 minute and analyzing each component in the molten zinc plating layer corresponding to the plating bath NO.
  • the plating bath composition is an analytical value in a bath dissolved in zinc, and a bismuth layer is formed on the bottom of the pot.
  • the coating layer was dissolved in an acid solution and measured by flameless atomic absorption.
  • the Bi and Pb components contained in the plating layer differ depending on the cooling conditions after plating. Therefore, what is important in the present invention is the amount of components such as Bi, Pb, and Cd in the plating layer.
  • Fig. 3 shows that JIS Z 237, together with a comparative product using a conventional plating bath, was subjected to hot-dip zinc plating using the No. 2 plating bath conditions on three different types of steel plate samples. Based on 1! The evaluation results of the salt spray test are shown.
  • the plating-treated product according to the present invention did not generate red mist for 240 hours in the salt spray, but the comparative product produced red varieties in the sample c after 240 hours. The progress of life was slower than the comparative product.
  • the molten zinc plating product (mesh coating) according to the present invention is superior in salt spray resistance to the conventional product.
  • Fig. 4 shows an iron pipe joint (elbow) with a thickness of 90 ⁇ in each bath shown in the table of Fig. 1. The result of copper test is shown.
  • the numbers of the present invention indicate the numbers of the plating bath.
  • the copper sulfate test is a mechanical property test based on JIS H 0401. After immersion in a specified test solution for 1 minute, immediately wash in water and repeat the test until brilliant metallic copper is deposited. It is measured.
  • the average film thickness indicates the range of the average value measured on the outer surface of each sample (elbow fitting) using an electromagnetic film thickness meter.
  • Fig. 5 shows an example of a cross-sectional photograph of the plating layer.
  • a bath temperature of about 460 ° is preferable, so the Bi component in the plating layer is estimated to be in the range of 1.0 to 2.5% by mass.
  • the Bi component is relatively expensive, even if the Bi component is lowered, the Bi component 1. desirability instrument stability of Bi component in terms of quality to ensure a range of 5% by weight from 0.5 to 2. It is preferable in the range of 5 mass 0/0.
  • a feature of the present invention is that the A1 (aluminum) component is from 0.001 to 0.000 in terms of the strength of the molten zinc plating containing no Bi and containing the Bi component, and the prevention of dripping of the plating. 1 wt%, or Sn components 0.1 001-0. 1 mass 0/0 approximately may be added.
  • the present invention is a molten zinc plating that does not substantially contain lead in the plating layer, and is excellent in corrosion resistance and adhesion, so that it can be used as a plating for various iron materials and iron products.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating With Molten Metal (AREA)

Abstract

This invention provides a Bi-containing hot-dip galvanizing technique which can realize a Pb-free state and a Cd-free state in a hot-dip galvanizing layer and excellent plating quality. The Bi-containing hot-dip galvanizing is characterized in that the content of a Bi component in the plating layer is 0.05 to 5.00% by mass. The incorporation of the Bi component in a predetermined proportion in a plating bath can provide a plating layer which has excellent plating adhesion and corrosion resistance and good quality of product appearance without the addition of any Pb component. In particular, from the viewpoint of reducing environmental loading substances, the content of the Pb component and the content of the Cd component in the hot-dip galvanizing layer are preferably not more than 0.1% by mass and not more than 100 ppm, respectively, and ideally not more than 0.01% by mass and not more than 10 ppm, respectively. In order to reduce the Pb and Cd component contents each to a low level, the use of an electrolytic zinc metal as a zinc (Zn) metal is preferred.

Description

明 細 書  Specification
溶融亜鉛メツキ  Molten zinc plating
技術分野  Technical field
[0001] 本発明は、溶融亜鉛メツキに関し、特に鉛レス、カドミウムレスの溶融亜鉛メツキ及 びそのメツキ浴に係る。  TECHNICAL FIELD [0001] The present invention relates to a molten zinc plating, and more particularly to a lead-free and cadmium-less molten zinc plating and a plating bath thereof.
背景技術  Background art
[0002] 溶融亜鉛メツキは耐食性及び密着性に優れ、また安価であることから鉄鋼材料へ の適用が普及している。  [0002] Molten zinc plating is excellent in corrosion resistance and adhesion, and is inexpensive, so that it is widely applied to steel materials.
[0003] 従来から使用されている溶融亜鉛メツキ用の亜鉛地金は、蒸留亜鉛地金 CFIS H 2107、一種）であり、この地金には通常 Pb成分が 1〜2質量％、 Cd成分が ΙΟΟΟρρ mレベルのオーダーで含有して!/、る。 [0003] Conventionally, the zinc bullion for molten zinc plating is a distilled zinc bullion CFIS H 2107, a kind), which usually contains 1-2% by mass of Pb component and Cd component. Include in the order of ΙΟΟΟρρ m level!
それは、溶融亜鉛メツキにおいては、ある程度 Pb成分を含有していないとメツキにタ レ不具合が生じやすぐまた密着性も劣るからである。  This is because, in molten zinc plating, if the Pb component is not included to some extent, the plating will suffer from sagging defects and will soon have poor adhesion.
また、溶融亜鉛メツキ用の蒸留亜鉛地金には、 Cd成分が不純物として多く含まれて いる。  Distilled zinc bullion for molten zinc plating contains a large amount of Cd components as impurities.
最近、環境負荷物質低減要求の観点から、溶融亜鉛メツキ中の鉛 (Pb)レス化及び カドミウム（Cd)レス化が要求されて!、る。  Recently, there has been a demand for lead (Pb) -less and cadmium (Cd) -less in molten zinc plating from the viewpoint of reducing environmentally hazardous substances!
[0004] そこで、本願発明者らは亜鉛の溶融メツキ操業温度で溶融状態になるビスマス (Bi) を鉛 (Pb)の替わりに用いることを検討した結果、本発明に至ったものである。 [0004] Accordingly, the present inventors have studied the use of bismuth (Bi), which is in a molten state at the melting temperature of zinc, in place of lead (Pb), and as a result, have reached the present invention.
なお、特開 2004— 11019号公報には、溶融亜鉛メツキ層と鋼材の間に Biのメツキ 層を介在させる技術を開示するが、亜鉛メツキ層中に Biを含有するものではな 、。  Japanese Patent Application Laid-Open No. 2004-11019 discloses a technique in which a Bi plating layer is interposed between a molten zinc plating layer and a steel material, but the zinc plating layer does not contain Bi.
[0005] 特許文献 1 :特開 2004— 11019号公報 Patent Document 1: Japanese Patent Application Laid-Open No. 2004-11019
発明の開示  Disclosure of the invention
発明が解決しょうとする課題  Problems to be solved by the invention
[0006] 本発明は、背景技術に有する技術的課題に鑑みて、溶融亜鉛メツキ層中の Pbレス 化及び Cdレス化が可能で、メツキ品質に優れた Bi含有溶融亜鉛メツキ技術の提供を 目的とする。 課題を解決するための手段 [0006] In view of the technical problems of the background art, the present invention aims to provide a Bi-containing molten zinc plating technique that can be made Pb-less and Cd-less in a molten zinc plating layer and has excellent plating quality. And Means for solving the problem
本発明の技術的要旨は、溶融亜鉛メツキにおいて、メツキ層中にビスマス (Bi)成分 が 0. 05〜5. 00質量0 /0含有していることを特徴とする。 Technical gist of the present invention, in the molten zinc plated, characterized in that the bismuth (Bi) component in the plated layer contains 0.05 to 5.00 mass 0/0.
メツキ層中に Bi成分を所定の割合含有させることにより、 Pb成分を添加しなくても耐 食性に優れ、外観品質のよ!、メツキ層が得られる。  By including a predetermined proportion of the Bi component in the plating layer, the plating layer can be obtained with excellent corrosion resistance and good appearance quality without adding the Pb component.
メツキ層中の Bi成分含有量は、メツキ浴組成、溶融メツキ条件等の制御によりコント ロールでき、溶融亜鉛中に溶け込むことができる最大の Bi成分量は浴温によって定 まり過剰の Biは、メツキ釜の釜底に溶融ビスマス層を形成して鉄製の釜を亜鉛の浸食 から保護する作用もある。  The Bi component content in the plating layer can be controlled by controlling the plating bath composition, melting plating conditions, etc., and the maximum amount of Bi component that can be dissolved in the molten zinc is determined by the bath temperature. A molten bismuth layer is formed on the bottom of the kettle to protect the iron kettle from zinc erosion.
また、被メツキ材 (鉄鋼材料等)のメツキ浴中の浸漬時間ゃメツキ浴力 取り出した後 の冷却速度によってもメツキ層中の Bi成分量が異なり、一般的には被メツキ材のメッ キ浴への投入温度が浴温よりも低 、のでメツキ浴中の Bi成分よりもメツキ層中の Bi成 分量の方が低い値を示す場合が多ぐメツキ浴中の Bi成分は 0. 050〜7質量％の範 囲で含有するようにするのがよ 、。  In addition, the immersion time of the material to be plated (steel material, etc.) in the plating bath depends on the cooling rate after removal, and the amount of Bi component in the plating layer also varies. Since the charging temperature into the bath is lower than the bath temperature, the Bi component in the plating layer often shows a lower value than the Bi component in the plating bath. It should be contained within the range of mass%.
メツキ浴中に Bi成分を所定の割合含有させることにより、メツキのつき廻り性がよくな ることも明らかになった。  It has also been clarified that by adding a predetermined amount of Bi component in the plating bath, the throwing power of the plating is improved.
環境負荷物質の低減の観点から、鉛レス化、カドミウムレス化を図るベぐ溶融亜鉛 メツキ層中の Pb成分が 0. 1質量％以下、 Cd成分が lOOppm以下であることが望まし ぐ理想的にはメツキ層中の Pb成分が 0. 01質量％以下、 Cd成分が lOppm以下で あるのがよい。  From the viewpoint of reducing environmentally hazardous substances, it is ideal that the Pb component in the molten zinc plating layer should be 0.1 mass% or less and the Cd component should be lOOppm or less in order to reduce lead and cadmium. It is preferable that the Pb component in the plating layer is 0.01% by mass or less and the Cd component is 10 ppm or less.
そのためには、メツキ浴の Pb成分が 0. 1質量％以下、 Cd成分が lOOppm以下で あることが望ましい。  For this purpose, it is desirable that the Pb component of the plating bath is 0.1% by mass or less and the Cd component is lOOppm or less.
このように、 Pb及び Cd成分を低く抑えるには、亜鉛 (Zn)地金として純度の高い電 気亜鉛地金を用いるのが良い。  Thus, in order to keep the Pb and Cd components low, it is better to use high-purity electrozinc ingots as the zinc (Zn) ingots.
なお、電気亜鉛地金とは電気分解による精製工程を経た亜鉛地金を!ヽぅ。  In addition, the zinc bullion is zinc bullion that has undergone a refining process by electrolysis.
また、メツキ処理時のメッキタレを抑える観点から A1又は Sn成分を 0. 001-0. 1質 量％添付してもよぐ耐食性のさらなる向上の観点力 Cu成分を 0. 01〜0. 1質量 o/o添カロしてもよ ヽ。 発明の効果 In addition, from the viewpoint of suppressing plating sagging during plating treatment, it is possible to attach A001 or Sn component in the amount of 0.001-0. 1% by mass. You can do it with o / o. The invention's effect
[0008] 従来の溶融亜鉛メツキにお!、ては、メツキ品質の確保ゃメツキ操業装置 (鉄釜)の保 護の観点力も Pb成分を含有させることが不可欠とされていたのに対して、本願に係る 発明にお 、ては、メツキ層中の Bi成分を添加制御することで Pb成分を特に含まなく てもメツキ外観及び耐食性が優れ、メツキ浴中に Bi成分を所定量含有させることでメ ツキのつき廻り性がよい。  [0008] In the conventional hot-dip zinc plating, it was essential to ensure the quality of the plating, and to protect the plating operation equipment (iron kettle) from the viewpoint of the protection of the Pb component. In the invention according to the present application, by adding and controlling the Bi component in the plating layer, the appearance of the plating and the corrosion resistance are excellent even if the Pb component is not included, and a predetermined amount of Bi component is contained in the plating bath. Good throwing power.
図面の簡単な説明  Brief Description of Drawings
[0009] [図 1]メツキ浴の浴組成の例を示す。 [0009] Fig. 1 shows an example of a bath composition of a Metsu bath.
[図 2]図 1に示したメツキ浴を用 、て得られた溶融亜鉛メツキ層中の成分分析結果を 示す。  FIG. 2 shows the results of component analysis in the molten zinc plating layer obtained using the plating bath shown in FIG.
[図 3]塩水噴霧試験結果を示す。  [Figure 3] Shows the results of salt spray test.
[図 4]メツキ皮膜の硫酸銅試験結果を示す。  [Fig. 4] Copper sulfate test results of the plating film are shown.
[図 5]メツキ皮膜の断面写真例を示す。  [Fig. 5] An example of a cross-sectional photograph of a plating film is shown.
発明を実施するための最良の形態  BEST MODE FOR CARRYING OUT THE INVENTION
[0010] 鉄製の鍋に電気亜鉛地金を溶融し、所定の割合にビスマス (Bi)を添加して図 1の 表に示す各メツキ浴を建て、この各メツキ浴の NO.及び浴温にて肉厚 1. 2mm鋼板 を 1分間浸漬処理し、得られた溶融亜鉛メツキ層中の各成分をメツキ浴の NO.に対 応して分析した値を図 2の表に示す。 [0010] Electrozinc bullion is melted in an iron pan, bismuth (Bi) is added to a predetermined ratio, and each plating bath shown in the table of Fig. 1 is built. Table 2 shows the values obtained by immersing a 1.2 mm thick steel plate for 1 minute and analyzing each component in the molten zinc plating layer corresponding to the plating bath NO.
ここで、メツキ浴組成は亜鉛に溶けている浴中の分析値であり、鍋の釜底にはビス マス層が形成されて 、てもよ 、。  Here, the plating bath composition is an analytical value in a bath dissolved in zinc, and a bismuth layer is formed on the bottom of the pot.
特に釜底の保護も目的にする場合には、釜底に積極的にビスマス層を形成させた 方がよい。  In particular, when the purpose is to protect the bottom of the kettle, it is better to positively form a bismuth layer on the bottom.
分析方法としては、メツキ被覆層を酸溶液に溶解し、フレームレス原子吸光法にて 測定した。  As an analysis method, the coating layer was dissolved in an acid solution and measured by flameless atomic absorption.
なお、比較のために従来の蒸留亜鉛地金を用いて、鉛 (Pb)成分を含有したメツキ 浴を比較例 1として表中にそれぞれ示す。  For comparison, a metal bath containing a lead (Pb) component using conventional distilled zinc bullion is shown in the table as Comparative Example 1, respectively.
溶融亜鉛メツキにぉ 、ては、浴温ゃメツキ後の冷却条件によりメツキ層中に含有す る Biや Pb成分は異なる。 従って、本発明にて重要なのはメツキ層中の Bi、 Pb、 Cd等の成分量である。 In the case of molten zinc plating, the Bi and Pb components contained in the plating layer differ depending on the cooling conditions after plating. Therefore, what is important in the present invention is the amount of components such as Bi, Pb, and Cd in the plating layer.
[0011] 図 3に、 3種類の形状の異なる鋼板製のサンプル品に対して NO. 2のメツキ浴条件 を用いて溶融亜鉛メツキを施し、従来のメツキ浴を用いた比較品とともに JIS Z 237 1に基づ！ヽて塩水噴霧試験をした評価結果を示す。 [0011] Fig. 3 shows that JIS Z 237, together with a comparative product using a conventional plating bath, was subjected to hot-dip zinc plating using the No. 2 plating bath conditions on three different types of steel plate samples. Based on 1! The evaluation results of the salt spray test are shown.
本発明に係るメツキ処理品は塩水噴霧 240時間赤鲭が発生しな力つたが、比較品 では 240時間でサンプル cに赤鲭が点状に発生し、本発明品はその後の赤鲭の発 生の進行が比較品より遅力つた。  The plating-treated product according to the present invention did not generate red mist for 240 hours in the salt spray, but the comparative product produced red varieties in the sample c after 240 hours. The progress of life was slower than the comparative product.
これにより、本発明に係る溶融亜鉛メツキ処理品 (メツキ被覆物）は従来品よりも耐塩 水噴霧性に優れていることが明らかになった。  As a result, it has been clarified that the molten zinc plating product (mesh coating) according to the present invention is superior in salt spray resistance to the conventional product.
[0012] 図 4に、鉄製の管継手 (エルボ）を図 1の表に示す各浴にてメツキ厚 90〜： LOO /z m ネライの溶融メツキを施し、比較例 1の浴による比較品とともに硫酸銅試験をした結果 を示す。 [0012] Fig. 4 shows an iron pipe joint (elbow) with a thickness of 90 ~ in each bath shown in the table of Fig. 1. The result of copper test is shown.
なお、図 4の表中、本発明の番号はメツキ浴の番号を示す。  In the table of FIG. 4, the numbers of the present invention indicate the numbers of the plating bath.
硫酸銅試験とは、 JIS H 0401に基づくメツキ性態試験で、所定の試験液に 1分 間浸漬後、直ちに水中洗浄し、光輝のある金属銅が析出するまで試験を繰り返し、そ の回数を測定したものである。  The copper sulfate test is a mechanical property test based on JIS H 0401. After immersion in a specified test solution for 1 minute, immediately wash in water and repeat the test until brilliant metallic copper is deposited. It is measured.
なお、 6回以上が製品品質上合格と判定できる。  In addition, it can be judged that the product quality is acceptable 6 times or more.
表中、平均膜厚は、電磁膜厚計を用いてサンプル (エルボ管継手)毎にその外側 表面 5点測定した平均値の範囲を示す。  In the table, the average film thickness indicates the range of the average value measured on the outer surface of each sample (elbow fitting) using an electromagnetic film thickness meter.
また、図 5にメツキ層の断面写真例を示す。  Fig. 5 shows an example of a cross-sectional photograph of the plating layer.
この結果、図 2のメツキ層の分析結果と合わせて考察すると、溶融亜鉛メツキ層中に Bi成分が 0. 04質量％以上〜 5. 00質量％以下の範囲にて含有している場合に、 P b成分 0. 1質量％以下の鉛レスであっても充分なメツキ品質を有することが明らかに なった。  As a result, considering together with the analysis result of the plating layer of FIG. 2, when the Bi component is contained in the molten zinc plating layer in the range of 0.04 mass% to 5.00 mass%, It has been clarified that the lead-free Pb component of 0.1% by mass or less has a sufficient texture quality.
この範囲では従来の鉛含有メツキよりも優れている。  This range is superior to conventional lead-containing plating.
また、安定したメツキ操業の観点からは、浴温約 460° 前後が好ましいのでメツキ層 中の Bi成分は 1. 0〜2. 5質量％の範囲になると推定される。  From the viewpoint of stable plating operation, a bath temperature of about 460 ° is preferable, so the Bi component in the plating layer is estimated to be in the range of 1.0 to 2.5% by mass.
また、 Bi成分は比較的高価であるので Bi成分を低くする場合でも Bi成分を 0. 05〜 1. 5質量％の範囲を確保するのが好ましぐ品質の安定性の観点からは Bi成分を 0 . 5〜2. 5質量0 /0の範囲にするのがよい。 Also, since the Bi component is relatively expensive, even if the Bi component is lowered, the Bi component 1. desirability instrument stability of Bi component in terms of quality to ensure a range of 5% by weight from 0.5 to 2. It is preferable in the range of 5 mass 0/0.
[0013] 本発明の特徴は、鉛レスにして Bi成分を含有させた溶融亜鉛メツキにある力 メツキ のっき廻り性、メツキのタレ防止の観点から A1 (アルミニウム）成分 0. 001〜0. 1質量 %、あるいは Sn成分 0. 001-0. 1質量0 /0程度添加してもよい。 [0013] A feature of the present invention is that the A1 (aluminum) component is from 0.001 to 0.000 in terms of the strength of the molten zinc plating containing no Bi and containing the Bi component, and the prevention of dripping of the plating. 1 wt%, or Sn components 0.1 001-0. 1 mass 0/0 approximately may be added.
例えば、図 1に示す NO. 10のメツキ浴に A1又は Snを 0. 01質量％添カ卩し、鉄製の 管継手を溶融メツキした結果、管継手の端部のメッキタレを抑えることができた。 また、 B诚分を含有したことにより従来品よりも耐食性に優れるが、耐食性のさらな る改善として Cu成分 0. 01-0. 1質量0 /0添カ卩してもよい。 For example, as a result of adding 0.01 mass% of A1 or Sn to the NO. 10 plating bath shown in Fig. 1 and melting the steel pipe joint, the plating sagging at the end of the pipe joint could be suppressed. . Although excellent in corrosion resistance than conventional products by containing B诚分, Cu ingredient 0. 01-0 as an improvement ing Sara corrosion resistance. 1 mass 0/0 may be添Ka卩.
産業上の利用可能性  Industrial applicability
[0014] 本発明は、メツキ層中に実質的に鉛を含有しな 、溶融亜鉛メツキであり、耐食性及 び密着性に優れているので、各種、鉄製材料及び鉄製製品のメツキとして利用できる [0014] The present invention is a molten zinc plating that does not substantially contain lead in the plating layer, and is excellent in corrosion resistance and adhesion, so that it can be used as a plating for various iron materials and iron products.

Claims

請求の範囲 The scope of the claims
[1] メツキ層中に Bi成分が 0. 05〜5. 00質量％含有していることを特徴とする溶融亜 鉛メツキ被覆物。  [1] A molten zinc plating coating characterized by containing 0.05 to 5.00% by mass of a Bi component in the plating layer.
[2] メツキ層中に含有する Pb成分 0. 1質量％以下、 Cd成分 lOOppm以下であることを 特徴とする請求の範囲 1記載の溶融亜鉛メツキ被覆物。  [2] The molten zinc plating coating according to claim 1, wherein the Pb component contained in the plating layer is 0.1% by mass or less and the Cd component is lOOppm or less.
[3] 浴中に溶けている Bi成分が 0. 050〜7質量％の範囲であることを特徴とする溶融 亜鉛メツキ浴。 [3] A molten zinc plating bath characterized in that the Bi component dissolved in the bath is in the range of 0.050 to 7% by mass.
[4] 溶中の Pb成分が 0. 1質量％以下、 Cd成分が lOOppm以下であることを特徴とす る請求の範囲 3記載の溶融亜鉛メツキ浴。  [4] The molten zinc plating bath according to claim 3, wherein the Pb component in the melt is 0.1% by mass or less and the Cd component is lOOppm or less.
PCT/JP2005/014106 2004-09-01 2005-08-02 Hot-dip galvanizing WO2006025176A1 (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009197328A (en) * 2008-01-22 2009-09-03 Jfe Steel Corp Method for producing hot dip galvanized steel pipe and hot dip galvanized material
JP2009221604A (en) * 2008-02-19 2009-10-01 Jfe Steel Corp Hot dip galvanized steel tube and manufacturing method of hot dip galvanized material
JP2009221605A (en) * 2008-02-19 2009-10-01 Jfe Steel Corp Hot dip galvanized steel tube and method of manufacturing hot dip galvanized material
JP2009221601A (en) * 2008-02-19 2009-10-01 Jfe Steel Corp Hot dip galvanized steel tube, and manufacturing method for hot dip galvanized material
JP2011153326A (en) * 2010-01-26 2011-08-11 Komagata Galvanizing Co Ltd Hot-dip galvanization
JP2012162763A (en) * 2011-02-04 2012-08-30 Jfe Steel Corp Hot-dip galvanized steel
JP2014028989A (en) * 2012-07-31 2014-02-13 Jfe Steel Corp Hot-dip galvanized steel tube

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Publication number Priority date Publication date Assignee Title
JPS61288039A (en) * 1985-06-17 1986-12-18 Nikko Aen Kk Zinc alloy for zinc hot dipping having crystal
JP2004285387A (en) * 2003-03-20 2004-10-14 Nippon Steel Corp Hot-dip galvanized steel sheet superior in appearance, and manufacturing method therefor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61288039A (en) * 1985-06-17 1986-12-18 Nikko Aen Kk Zinc alloy for zinc hot dipping having crystal
JP2004285387A (en) * 2003-03-20 2004-10-14 Nippon Steel Corp Hot-dip galvanized steel sheet superior in appearance, and manufacturing method therefor

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009197328A (en) * 2008-01-22 2009-09-03 Jfe Steel Corp Method for producing hot dip galvanized steel pipe and hot dip galvanized material
JP2009221604A (en) * 2008-02-19 2009-10-01 Jfe Steel Corp Hot dip galvanized steel tube and manufacturing method of hot dip galvanized material
JP2009221605A (en) * 2008-02-19 2009-10-01 Jfe Steel Corp Hot dip galvanized steel tube and method of manufacturing hot dip galvanized material
JP2009221601A (en) * 2008-02-19 2009-10-01 Jfe Steel Corp Hot dip galvanized steel tube, and manufacturing method for hot dip galvanized material
JP2011153326A (en) * 2010-01-26 2011-08-11 Komagata Galvanizing Co Ltd Hot-dip galvanization
JP2012162763A (en) * 2011-02-04 2012-08-30 Jfe Steel Corp Hot-dip galvanized steel
JP2014028989A (en) * 2012-07-31 2014-02-13 Jfe Steel Corp Hot-dip galvanized steel tube

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