JPS6362835A - Zinc alloy for hot dip galvanizing and method for using same - Google Patents
Zinc alloy for hot dip galvanizing and method for using sameInfo
- Publication number
- JPS6362835A JPS6362835A JP20516586A JP20516586A JPS6362835A JP S6362835 A JPS6362835 A JP S6362835A JP 20516586 A JP20516586 A JP 20516586A JP 20516586 A JP20516586 A JP 20516586A JP S6362835 A JPS6362835 A JP S6362835A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- plating
- alloy
- dip galvanizing
- hot
- 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
- 229910001297 Zn alloy Inorganic materials 0.000 title claims abstract description 20
- 238000005246 galvanizing Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 27
- 239000010959 steel Substances 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 19
- 238000005260 corrosion Methods 0.000 claims abstract description 11
- 239000012535 impurity Substances 0.000 claims abstract description 11
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 11
- 230000007797 corrosion Effects 0.000 claims abstract description 10
- 229910052793 cadmium Inorganic materials 0.000 claims abstract description 7
- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
- 229910052745 lead Inorganic materials 0.000 claims abstract description 5
- 238000007747 plating Methods 0.000 claims description 44
- 239000011701 zinc Substances 0.000 claims description 15
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 13
- 229910052718 tin Inorganic materials 0.000 abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 abstract description 3
- 238000007598 dipping method Methods 0.000 abstract description 2
- 229910052748 manganese Inorganic materials 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 230000035939 shock Effects 0.000 abstract 1
- 229910001335 Galvanized steel Inorganic materials 0.000 description 15
- 239000008397 galvanized steel Substances 0.000 description 15
- 239000010410 layer Substances 0.000 description 8
- 239000002344 surface layer Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 229910009369 Zn Mg Inorganic materials 0.000 description 3
- 229910007573 Zn-Mg Inorganic materials 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
皇呈上皇剋■立互
本発明は、−膜構造物用溶融亜鉛メツキ鋼を製造するの
に利用される溶融亜鉛メッキ用亜鉛合金及びその使用方
法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a zinc alloy for hot-dip galvanizing used to produce hot-dip galvanized steel for membrane structures and a method for using the same.
鴛迷ｊ１む幻１１量
溶融亜鉛メッキ鋼は、建築、土木、電力、運輸、農業及
び水産等の広範囲の分野において種々の構造物や施設の
耐食材料として利用されている。しかし、溶融亜鉛メッ
キ鋼の上述した利用に際しての運搬、施工及び保管等の
取扱い時における接触や衝撃に因って該メッキ鋼のメッ
キ皮膜が損傷することが少くないため、メッキ皮膜硬度
の−そう高い溶融亜鉛メッキ鋼の提供が要望されている
。Hot-dip galvanized steel is used as a corrosion-resistant material for various structures and facilities in a wide range of fields such as architecture, civil engineering, electric power, transportation, agriculture, and fisheries. However, when hot-dip galvanized steel is used as described above, the plating film of the galvanized steel is often damaged due to contact and impact during handling such as transportation, construction, and storage, so the hardness of the galvanized steel may deteriorate. There is a need to provide high quality hot dip galvanized steel.
また、工業地帯、海洋地帯及び泉害地域におけるような
過酷な環境下での構造物や施設の材料に使用される溶融
亜鉛メッキ鋼では、通常の比較的温和な環境下で使用さ
れるものの１ノ２〜１ノ３程度の期間の寿命であるため
、−そう高い耐食性が要求される。In addition, hot-dip galvanized steel, which is used as a material for structures and facilities in harsh environments such as industrial areas, ocean areas, and areas affected by springs, is one of the materials used in normal relatively mild environments. Since the life span is about 2 to 13 years, very high corrosion resistance is required.
囚に、従来、溶融亜鉛メッキ鋼の上記取扱い時に起きる
メッキ皮膜の損傷の対策としては、擦過傷程度の損傷で
はそのまま使用に供し、メッキ層が剥離したものでは再
メッキを施すかもしくは亜鉛粉末を高濃度に含有させた
、いわゆるジンクリッチペイントの塗布を施し、場合に
よっては新しいメッキ鋼と取替える等の手段を、上記損
傷度とユーザの検査基準の要求とに合わせて講じている
のが現状である。Conventionally, as a countermeasure against damage to the plating film that occurs when hot-dip galvanized steel is handled, if the damage is only abrasions, it should be used as is, and if the plating layer has peeled off, it should be re-plated or treated with high zinc powder. At present, measures such as applying a so-called zinc-rich paint containing a high concentration of zinc-rich paint and, in some cases, replacing the plated steel with new plated steel, are taken depending on the degree of damage mentioned above and the requirements of the user's inspection standards. .
したがって、溶融亜鉛メッキ鋼の取扱い時に際しての損
傷を防止するには作業者の注意に頼るしかなく、この点
が上記メッキ鋼の性状上の短所とされている。Therefore, the only way to prevent damage when handling hot-dip galvanized steel is to rely on the operator's caution, and this point is considered to be a disadvantage in terms of the properties of the above-mentioned galvanized steel.
なお、溶融亜鉛メッキ鋼の寿命は、メッキ付着量に比例
するものであって、寿命期間を長くするにはメ・ンキ付
着量を増加する必要があるので該メッキ鋼の重量増とな
、す、そのため建築構造物や鉄塔、橋梁等の設計段階で
の重量減と寿命保証との関係が問題となっている。The lifespan of hot-dip galvanized steel is proportional to the amount of coating applied, and in order to extend the life span, it is necessary to increase the amount of galvanized coating, which increases the weight of the galvanized steel. Therefore, the relationship between weight reduction at the design stage of building structures, steel towers, bridges, etc. and life guarantees has become an issue.
元日がｎｔシようとする量
本発明は、従来の熔融亜鉛メッキ鋼にみられる上述した
問題に鑑みなされたものであって、上述したような過酷
な環境下においても十分な耐食性を示すと共に取扱い時
における接触や衝撃にも耐える高い硬度のメッキ皮膜を
形成する溶融亜鉛メッキ用亜鉛合金及びその使用方法を
提供することを目的とする。The present invention was developed in view of the above-mentioned problems found in conventional hot-dip galvanized steel, and exhibits sufficient corrosion resistance even under the above-mentioned harsh environments. The object of the present invention is to provide a zinc alloy for hot-dip galvanizing that forms a highly hard plating film that can withstand contact and impact during handling, and a method for using the same.
以下本発明の詳細な説明する。The present invention will be explained in detail below.
光皿至盪底
本発明の特徴は、Ｍｇ０．０５〜１．０重量％、八Ｉ
０．００３〜０．０８重量％、Ｐｂ、 Ｃｄ、 Ｆｅも
しくはＳｎ等の不可避的不純物の合計量が０．０１重量
％未満、及び残部がＺｎから成る溶融亜鉛メッキ用亜鉛
合金、及び該亜鉛合金を用いて浴温度４４０℃〜４８０
℃で鉄鋼材料にメッキを施すことにある。なお、ここで
いう鉄鋼材料のメッキは、大気中で行われる、いわゆる
ドブ浸はメッキと称せられる溶融亜鉛メッキであって、
特に大型鋼材を対象とした溶融亜鉛メッキを意味する。The characteristics of the present invention are as follows: Mg 0.05 to 1.0% by weight,
A zinc alloy for hot-dip galvanizing comprising 0.003 to 0.08% by weight, a total amount of unavoidable impurities such as Pb, Cd, Fe or Sn of less than 0.01% by weight, and the balance being Zn, and the zinc alloy using a bath temperature of 440℃~480℃
The purpose is to plate steel materials at ℃. Note that the plating of steel materials referred to here is hot-dip galvanizing, which is performed in the atmosphere and is called gutter immersion plating.
This refers to hot-dip galvanizing, especially for large steel materials.
課 を”するための手。Hands for doing the section.
本発明に係る溶融亜鉛メッキ用亜鉛合金はＭｇ０．０５
〜１．０重量％、Ａｌ ０．００３〜０．０８重量％含
有することが重要であって、Ｍｇは鉄鋼の亜鉛メッキに
際して下記のような機能を有するものである。The zinc alloy for hot-dip galvanizing according to the present invention has Mg0.05
It is important to contain ~1.0% by weight and 0.003~0.08% by weight of Al, and Mg has the following functions when galvanizing steel.
溶融亜鉛メッキ浴中のＭｇ成分はＺｎと化合してＭｇＺ
ｎ ！または”ｇｚＺｎ３の形体の金属間化合物と固溶
するので、該メッキ浴中に鋼材を浸漬するとＺｎ −Ｆ
ｅの合金化反応が優先的に進行し、鋼材を浴から引上げ
る際にＺｎ −Ｆｅ合金層上にＺｎ −Ｍｇ合金層が形
成される。そして、このようなメッキ層表層を形成する
Ｚｎ −Ｍｇ合金層はＺｎ単独メッキ鋼のメッキ皮膜よ
りも硬く、メッキ鉄鋼製品の運搬、施工及び保管等の取
扱いに際して生ずる接触や衝撃によるメッキ皮膜の損傷
を軽減させる。また、上記メッキ層表層部においてＭｇ
は酸化物の形体となってメッキ層の保護膜を形成するの
でメッキ鋼の耐食性を向上させる作用もする。The Mg component in the hot-dip galvanizing bath combines with Zn to form MgZ
n! Zn-F forms a solid solution with intermetallic compounds in the form of ``gzZn3,'' so when steel is immersed in the plating bath,
The alloying reaction of e proceeds preferentially, and a Zn-Mg alloy layer is formed on the Zn-Fe alloy layer when the steel material is pulled up from the bath. The Zn-Mg alloy layer that forms the surface layer of such a plating layer is harder than the plating film of Zn-only plated steel, and the plating film may be damaged by contact or impact that occurs during handling such as transportation, construction, and storage of plated steel products. reduce. Furthermore, Mg in the surface layer of the plating layer is
Since it becomes an oxide and forms a protective film for the plating layer, it also has the effect of improving the corrosion resistance of the plated steel.
しかしながら、溶融亜鉛中にＭｇを添加、溶解して保持
すると、浴中の？Ｉｇが表層で選択的に酸化するためＺ
ｎ −Ｍｇ系のトップドロスが生成するという問題があ
る。本発明では、このようなトップドロスの生成を低減
するためにＡｌを溶融亜鉛中に添加する。すなわち、溶
融亜鉛に先ずＡｌを添加、溶解し、次いでＭｇを溶解す
ると、表層にＡ１の酸化膜が優先的に生成するため、ｈ
ｇの上記酸化が抑止されル、シたがって、Ｍｇの酸化に
よるＺｎ −Ｍｇ系のトップドロスの生成量が大中に減
少すると共に、トップドロス付着によるメッキ製品の外
観上の欠陥も低減できる。However, if Mg is added, dissolved and retained in molten zinc, ? Because Ig is selectively oxidized at the surface layer, Z
There is a problem in that n-Mg-based top dross is generated. In the present invention, Al is added to molten zinc in order to reduce the formation of such top dross. That is, when Al is first added and dissolved in molten zinc and then Mg is dissolved, an oxide film of A1 is preferentially formed on the surface layer, so that h
Therefore, the amount of Zn--Mg-based top dross produced due to the oxidation of Mg is greatly reduced, and defects in the appearance of plated products due to adhesion of top dross can also be reduced.
溶融亜鉛メッキ浴中の＾Ｉ含有量は、０．００３〜０．
０８重景％であることが必要であって、その量が０．０
８重量％より多くなるとメッキ浴上に生成するＡｌの酸
化膜が強固になりすぎるため、従来の塩化物系フラック
スでは不メッキが発生し、一方、０．００３重量％未満
ではメッキ浴表層における初期のＭｇｆＪ化の抑制効果
がなくなる。The ^I content in the hot-dip galvanizing bath is between 0.003 and 0.003.
It is necessary that the weight is 0.08%, and the amount is 0.0
When the amount exceeds 8% by weight, the Al oxide film formed on the plating bath becomes too strong, resulting in non-plating with conventional chloride-based fluxes, while when it is less than 0.003% by weight, the Al oxide film formed on the plating bath surface becomes too strong. The effect of suppressing the formation of MgfJ disappears.
また、溶融亜鉛メッキ用亜鉛合金中のＭｇ含有量は０．
０５〜１．０重量％であることが必要であって、その量
が１．０重量％より多くなるとメッキ浴上に生成する酸
化物が多量となってメツキロ材とのメツキ濡れ性が低下
し、一方、０．０５重盪％未満ではメッキ層表層のＭｇ
酸化物の生成が未熟となって上述したような耐食効果が
得られなくなる。Furthermore, the Mg content in the zinc alloy for hot-dip galvanizing is 0.
It is necessary for the amount to be between 0.05 and 1.0% by weight, and if the amount is more than 1.0% by weight, a large amount of oxide will be generated on the plating bath and the plating wettability with the plating material will decrease. On the other hand, if it is less than 0.05% by weight, Mg on the surface layer of the plating layer
The formation of oxides becomes immature and the above-mentioned anti-corrosion effect cannot be obtained.
また、本発明に係る溶融亜鉛メッキ用亜鉛合金は、Ｐｂ
、 Ｃｄ、 ＦｅもしくはＳｎ等の不純物の合計含有量
が０．０１重量％未満であるが、これら金属不純物はＺ
ｎに不可避的に微量含まれるものである。したがって、
溶融亜鉛メッキ用亜鉛合金中の上記不純物の合計量を０
．０１重量％未満にするには、該不純物合計量が０．０
１重量％未満の亜鉛を用いるとよい。Furthermore, the zinc alloy for hot-dip galvanizing according to the present invention has Pb
The total content of impurities such as , Cd, Fe or Sn is less than 0.01% by weight, but these metal impurities are
It is unavoidably contained in trace amounts in n. therefore,
The total amount of the above impurities in the zinc alloy for hot dip galvanizing is reduced to 0.
．． To make it less than 0.01% by weight, the total amount of impurities should be 0.0% by weight.
It is advisable to use less than 1% by weight of zinc.
このような亜鉛としてはＪＩＳ ２１０７に規定される
亜鉛地金において特殊亜鉛以上の亜鉛純度を有するもの
であって、亜鉛地金中に含まれる不純物含量は例えばＰ
ｂ Ｏ，０１０重量％以下、Ｃｄ Ｏ，００１０重鼠％
以下である。Such zinc has a purity higher than special zinc in the zinc ingot specified in JIS 2107, and the impurity content in the zinc ingot is, for example, P.
b O,0010% by weight or less, Cd O,0010% by weight
It is as follows.
次に、本発明の溶融亜鉛メッキ用亜鉛合金を用いて鉄鋼
材料にメッキを施す方法について説明する。Next, a method of plating a steel material using the zinc alloy for hot-dip galvanizing of the present invention will be described.
本発明によるメッキ方法を行うには、上記亜鉛合金をメ
ッキ浴釜中で常法により溶融させ、その中に脱脂、湯洗
い等の前処理をした鉄鋼材料を浸漬するものであるが、
その際メッキ浴の組成はＭｇ０．０５〜１．０重量％、
Ａｌ ０．００３〜０．０８重量％、ｐｂ、Ｃｄ、 Ｆ
ｅもしくはＳｎ等の不可避的不純物０．０１重量％未満
と鋼材並びにメッキ浴釜から溶出するＦｅ Ｏ，０３〜
０．１重量％を含有する亜鉛合金浴となる。To carry out the plating method according to the present invention, the zinc alloy is melted in a plating bath using a conventional method, and the steel material that has been pretreated by degreasing, hot water washing, etc. is immersed in the melt.
At that time, the composition of the plating bath was Mg0.05 to 1.0% by weight,
Al 0.003-0.08% by weight, pb, Cd, F
Less than 0.01% by weight of unavoidable impurities such as e or Sn and FeO,03~ eluted from steel materials and plating baths.
The result is a zinc alloy bath containing 0.1% by weight.
上記メッキに際してのメッキ浴の浴温度は４４０°Ｃ〜
４８０℃の範囲に調整することが必要であって、浴温度
が４４０℃より低いとメッキ浴の粘度が高くなって形成
されるメッキの膜厚が不均一になり、一方４８０℃より
高いとメッキ浴表面における酸化物の生成量が多くなっ
てメッキ鋼材とのメッキ濡れ性及び歩留りが低下する等
の問題が生ずるので好ましくない。The bath temperature of the plating bath during the above plating is 440°C ~
It is necessary to adjust the bath temperature within the range of 480°C; if the bath temperature is lower than 440°C, the viscosity of the plating bath will increase and the thickness of the plating formed will be uneven, while if it is higher than 480°C, the plating will become uneven. This is not preferable since the amount of oxides produced on the bath surface increases, causing problems such as a decrease in plating wettability with plated steel materials and a decrease in yield.
なお、鋼材のメッキ浴中の浸漬時間及びメッキ鋼材のメ
ッキ浴からの引上げ速度は鋼種、鋼材の肉厚及び形状等
を勘案して適宜選択するとよい。Note that the immersion time of the steel material in the plating bath and the rate of pulling the plated steel material out of the plating bath may be appropriately selected in consideration of the steel type, the thickness and shape of the steel material, etc.
本発明により、溶融亜鉛メッキ用亜鉛合金を用い、上述
のようにして鉄鋼材料をメッキ浴に浸漬し、引上げるこ
とによりメッキを施して得られるＺｎ −Ｍｇ合金鋼は
従来の溶融亜鉛メッキ鋼に比し下記のとおりの利点を有
する。According to the present invention, Zn-Mg alloy steel obtained by using a zinc alloy for hot-dip galvanizing and plating a steel material by dipping it in a plating bath and pulling it up as described above is superior to conventional hot-dip galvanized steel. It has the following advantages.
又皿鬼四米
（イ）メッキ皮膜の硬度が約２倍向上するので、製品の
運搬、施工及び保管の取扱いに際して生ずる接触や衝撃
によるメッキ皮膜の損傷を防止もしくは著しく軽減でき
る。In addition, since the hardness of the plated film is approximately doubled, it is possible to prevent or significantly reduce damage to the plated film due to contact or impact that occurs during transportation, construction, and storage of the product.
（ロ）メッキ鋼の耐食性が約３倍向上するので、メッキ
付着量を増加させなくても、工業地帯、海洋地帯並びに
泉害地域での過酷な環境下での使用における寿命期間を
著しく延長できる。(b) Since the corrosion resistance of plated steel is improved approximately three times, the service life can be significantly extended when used in harsh environments such as industrial areas, marine areas, and spring-damaged areas without increasing the amount of coating applied. .
（ハ）溶融亜鉛中にＭｇを加えてＡｌを含有させること
により、浴表面におけるＭｇの選択的酸化に起因するＺ
ｎ −Ｍｇ系のトップドロスの生成量を大巾に減少する
ことができる。(c) By adding Mg to molten zinc to contain Al, Z caused by selective oxidation of Mg on the bath surface
The amount of n-Mg-based top dross produced can be greatly reduced.
したがって、本発明によると、従来から広範囲な分野で
利用されている溶融亜鉛メッキ鋼の短所とされていた取
扱い時に際して起るメッキ皮膜の損傷及び過酷な条件下
での寿命の低下等の問題点が有効に解決されるので、該
メッキ鋼の利用上非常に有益であると言える。Therefore, according to the present invention, problems such as damage to the plating film that occurs during handling and shortened life under harsh conditions, which have been considered disadvantages of hot-dip galvanized steel that has been used in a wide range of fields, can be solved. can be effectively solved, so it can be said that it is very beneficial for the use of the plated steel.
以下に実施例を示して本発明の上記効果を具体的に説明
する。The above-mentioned effects of the present invention will be specifically explained below with reference to Examples.
実施例
機中５０ｍｍ ｘ板長１００＋＊ｍ ｘ板厚３．２＋ｎ
ｍの寸法のｓｓ ４１ Ｋｆ４板を、８０℃の温度のア
ルカリ浴に３０分浸漬して脱脂を行った後湯洗し、次い
で塩酸の１０％溶液（常温）に３０分浸漬して錆を除去
し、湯洗後ＺｎＣ１ｚ Ｎ１１ａＣＩ溶液（８０℃）
に１分浸漬してフラックス処理を行った。Example machine: 50mm x plate length 100+*m x plate thickness 3.2+n
An SS 41 Kf4 plate with dimensions of m was immersed in an alkaline bath at a temperature of 80°C for 30 minutes to degrease it, then washed with hot water, and then immersed in a 10% solution of hydrochloric acid (at room temperature) for 30 minutes to remove rust. After washing with hot water, ZnC1z N11aCI solution (80℃)
Flux treatment was performed by immersing it in water for 1 minute.
上述のようにして前処理を行った各鋼板を下記表に示す
各メッキ浴を用いて浴温度４６０°Ｃで１分間浸漬を行
い、１１当り１ｍの速度でメッキ浴より引上げた。メッ
キ浴から引上げ後温水（６０℃）で冷却した。Each steel plate pretreated as described above was immersed in each plating bath shown in the table below at a bath temperature of 460°C for 1 minute, and then pulled out of the plating bath at a rate of 1 m per 11 plating baths. After being pulled up from the plating bath, it was cooled with warm water (60°C).
上述のようにして得られたメッキ鋼板の各々についてメ
ッキ皮膜硬度とＳＳＴ （塩水噴霧試験）２４０時間後
の腐食減量を測定した。For each of the plated steel sheets obtained as described above, the plating film hardness and corrosion loss after 240 hours of SST (salt spray test) were measured.
結果は下記表に示すとおりである。The results are shown in the table below.
上記表にみられるとおり、本発明によると、Ａｌを含有
させない参考例のメッキ浴を用いた場合に比べ、メッキ
皮膜硬度及び耐食性が向上することがわかる。As seen in the above table, it can be seen that according to the present invention, the plating film hardness and corrosion resistance are improved compared to the case where the plating bath of the reference example which does not contain Al is used.
Claims (2)
０．０８重量％、Ｐｂ、Ｃｄ、ＦｅもしくはＳｎ等の不
可避不純物の合計量が０．０１重量％未満、及び残部が
Ｚｎから成る優れた耐食性及び高い硬度のメッキ皮膜形
成能を有する溶融亜鉛メッキ用亜鉛合金。(1) Mg0.05~1.0% by weight, Al0.003~
Hot-dip galvanizing having excellent corrosion resistance and the ability to form a plating film with high hardness, consisting of 0.08% by weight, the total amount of unavoidable impurities such as Pb, Cd, Fe, or Sn being less than 0.01% by weight, and the balance being Zn. Zinc alloy for use.
０．０８重量％、Ｐｂ、Ｃｄ、ＦｅもしくはＳｎ等の不
可避的不純物の合計量が０．０１重量％未満、及び残部
がＺｎから成る溶融亜鉛用亜鉛合金を用い、浴温度４４
０℃〜４８０で鉄鋼材料にメッキを施す方法。(2) Mg0.05~1.0% by weight, Al0.003~
Using a zinc alloy for molten zinc consisting of 0.08% by weight, the total amount of unavoidable impurities such as Pb, Cd, Fe, or Sn being less than 0.01% by weight, and the balance being Zn, the bath temperature was 44%.
A method of plating steel materials at temperatures between 0°C and 480°C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20516586A JPS6362835A (en) | 1986-09-02 | 1986-09-02 | Zinc alloy for hot dip galvanizing and method for using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20516586A JPS6362835A (en) | 1986-09-02 | 1986-09-02 | Zinc alloy for hot dip galvanizing and method for using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6362835A true JPS6362835A (en) | 1988-03-19 |
Family
ID=16502499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20516586A Pending JPS6362835A (en) | 1986-09-02 | 1986-09-02 | Zinc alloy for hot dip galvanizing and method for using same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6362835A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100498092B1 (en) * | 2000-11-02 | 2005-07-01 | 주식회사 포스코 | corrosion resistant Zinc plating bath and products |
| JP2008531844A (en) * | 2005-02-22 | 2008-08-14 | ティッセンクルップ スチール アクチェンゲゼルシャフト | Coated steel plate or strip |
| JP2011089175A (en) * | 2009-10-22 | 2011-05-06 | Sumitomo Metal Ind Ltd | Hot-dip galvanized steel pipe and method for manufacturing the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56152953A (en) * | 1980-04-25 | 1981-11-26 | Nippon Steel Corp | Composition for steel sheet coated with zinc alloy by hot dipping |
| JPS57203760A (en) * | 1981-06-11 | 1982-12-14 | Nippon Steel Corp | Manufacture of hot-dipped band steel |
-
1986
- 1986-09-02 JP JP20516586A patent/JPS6362835A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56152953A (en) * | 1980-04-25 | 1981-11-26 | Nippon Steel Corp | Composition for steel sheet coated with zinc alloy by hot dipping |
| JPS57203760A (en) * | 1981-06-11 | 1982-12-14 | Nippon Steel Corp | Manufacture of hot-dipped band steel |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100498092B1 (en) * | 2000-11-02 | 2005-07-01 | 주식회사 포스코 | corrosion resistant Zinc plating bath and products |
| JP2008531844A (en) * | 2005-02-22 | 2008-08-14 | ティッセンクルップ スチール アクチェンゲゼルシャフト | Coated steel plate or strip |
| JP2011089175A (en) * | 2009-10-22 | 2011-05-06 | Sumitomo Metal Ind Ltd | Hot-dip galvanized steel pipe and method for manufacturing the same |
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