JP3357471B2 - Zn-Mg-Al-based hot-dip galvanized steel excellent in corrosion resistance and method for producing the same - Google Patents
Zn-Mg-Al-based hot-dip galvanized steel excellent in corrosion resistance and method for producing the sameInfo
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- JP3357471B2 JP3357471B2 JP19696894A JP19696894A JP3357471B2 JP 3357471 B2 JP3357471 B2 JP 3357471B2 JP 19696894 A JP19696894 A JP 19696894A JP 19696894 A JP19696894 A JP 19696894A JP 3357471 B2 JP3357471 B2 JP 3357471B2
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- hot
- corrosion resistance
- dip
- plating
- galvanized steel
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Description
【０００１】[0001]
【産業上の利用分野】本発明は、耐食性に優れたZn−Mg
−Al系溶融めっき鋼材とその製造方法に関するものであ
る。BACKGROUND OF THE INVENTION The present invention relates to a Zn-Mg alloy having excellent corrosion resistance.
The present invention relates to an Al-based hot-dip coated steel material and a method for producing the same.
【０００２】[0002]
【従来の技術】近年、自動車用材料や建築用材料の分野
では、耐食性を有する亜鉛めっき鋼材, 鋼線その他の溶
融亜鉛めっき鋼材等が多く使用されている。その背景と
しては、亜鉛はもともと安価であるとともに、鋼に対し
犠牲防食効果を有し鋼材等の防食に適しているからであ
る。2. Description of the Related Art In recent years, galvanized steel, steel wire and other hot-dip galvanized steel having corrosion resistance have been widely used in the field of automotive materials and building materials. The reason is that zinc is originally inexpensive and has a sacrificial anticorrosion effect on steel and is suitable for anticorrosion of steel materials and the like.
【０００３】ところで、溶融亜鉛めっき使用時の外観に
関し最近、赤錆発生防止、塗装後耐ブリスター性の向上
等への要求が高まってきた。こうした要求に応えられる
ものとして従来、溶融亜鉛めっきの耐食性を向上させる
手段の１つとして、Mgを添加する方法、例えば、特開昭
56−41359 号公報などの提案がなされている。[0003] In recent years, there has been an increasing demand for the appearance of hot-dip galvanized plating to prevent the occurrence of red rust and to improve the blister resistance after painting. In order to meet such demands, conventionally, as one of means for improving the corrosion resistance of hot-dip galvanizing, a method of adding Mg, for example, as disclosed in
Proposals such as JP-A-56-41359 have been made.
【０００４】[0004]
【発明が解決しようとする課題】ところで、特開昭56−
41358 号公報に開示されている、溶融亜鉛めっき浴中に
Mgを添加し、Zn−Mg系化合物を生成させて耐食性を向上
させる上記従来技術の場合、このMgのためにめっき浴表
面における融液の酸化が激しくなることから、多量のMg
を添加することができず、このことが耐食性のさらなる
向上を目指す上で障害となっていた。By the way, Japanese Patent Application Laid-Open No.
In the hot dip galvanizing bath disclosed in JP 41358
In the case of the above-described conventional technique in which Mg is added to generate a Zn-Mg-based compound to improve corrosion resistance, the Mg causes intense oxidation of the melt on the plating bath surface.
Cannot be added, and this has been an obstacle in aiming for further improvement of corrosion resistance.
【０００５】本発明の主たる目的は、耐食性に優れた溶
融亜鉛めっき鋼材を提供することにある。本発明の他の
目的は、Al及びCa, Li, Beのいずれか１種以上を添加す
ることによって浴成分の酸化を防止し、めっき作業性を
向上させることにある。[0005] A main object of the present invention is to provide a galvanized steel material having excellent corrosion resistance. Another object of the present invention is to prevent oxidation of bath components and improve plating workability by adding at least one of Al and Ca, Li, Be.
【０００６】[0006]
【課題を解決するための手段】上掲の各目的を実現する
ものとして本発明は、以下に掲げる課題解決手段を採用
する。 (1) Mg：0.2 〜3 wt％、Al：0.06〜0.25wt％を含み、そ
してCa, BeおよびLiのうちから選ばれる１種または２種
以上を 0.001〜0.01wt％含有し、残部がZnからなる組成
を有し、かつ組織がZn−η相及びMg2 Zn11からなる溶融
めっき層を、鋼材表面に有することを特徴とする耐食性
に優れたZn−Mg−Al系溶融めっき鋼材。The present invention employs the following means for achieving the above objects in order to achieve the above objects. (1) Mg: 0.2 to 3 wt%, Al: 0.06 to 0.25 wt%, and 0.001 to 0.01 wt% of one or more selected from Ca, Be and Li, with the balance being Zn A Zn-Mg-Al-based hot-dip galvanized steel material having excellent corrosion resistance, characterized by having a hot-dip coating layer having a composition of Zn-η phase and Mg 2 Zn 11 on the surface of the steel material.
【０００７】(2) 上記のめっき層の化学組成は、Mg：0.
4 〜２wt％、Al：0.1 〜0.25wt％、Ca, BeおよびLiは
0.005〜0.01wt％の範囲内で含有することがより好まし
い。(2) The chemical composition of the plating layer is as follows:
4 to 2 wt%, Al: 0.1 to 0.25 wt%, Ca, Be and Li
More preferably, it is contained in the range of 0.005 to 0.01 wt%.
【０００８】(3) 溶融亜鉛めっきを行う際に、被めっき
鋼材を、Mg：0.2 〜3 wt％、Al：0.06〜0.25wt％を含
み、かつCa, BeおよびLiのうちから選ばれる１種または
２種以上を 0.001〜0.01wt％含有し、残部が実質的にZn
からなる溶融めっき浴に浸漬して溶融めっきし、その後
めっき相が凝固するまで10℃／sec.以下の冷却速度で徐
冷することを特徴とする耐食性に優れたZn−Mg−Al系溶
融めっき鋼材の製造方法。(3) When performing hot-dip galvanizing, the steel to be plated contains Mg: 0.2 to 3 wt%, Al: 0.06 to 0.25 wt%, and is selected from Ca, Be and Li. Alternatively, 0.001 to 0.01 wt% of two or more kinds are contained, and the balance is substantially Zn.
Zn-Mg-Al-based hot-dip coating with excellent corrosion resistance, characterized by dipping in a hot-dip bath consisting of hot-dip and then gradually cooling at a cooling rate of 10 ° C / sec or less until the plating phase solidifies Method of manufacturing steel.
【０００９】[0009]
【作用】以下に、本発明に想到するに至った開発経緯に
ついて説明する。発明者らの研究によると、鋼材表面に
Mg添加溶融亜鉛めっきした場合、そのめっき層は一般
に、MgZn2 及びZn−η層によって構成されている。しか
し、そのめっき処理の後に、めっき層が凝固するまでの
冷却速度を10℃／秒以下という緩冷却にした場合には、
このとき得られためっき層はMg2 Zn11とZn−η層とによ
って構成されることがわかった。ところで、このMg2 Zn
11は、MgZn2 よりもZn含有率が相対的に高く、そのため
にめっき層中Zn−η層に対するZn−Mg系化合物の割合が
約３倍と多くなり、このMg2 Zn11が存在すると耐食性が
向上するという事実を発見した。即ち、本発明は、Mg添
加溶融亜鉛めっき後、めっき層が凝固するまでの冷却速
度を10℃／sec 以下、より好ましくは５℃/sec以下に制
御することにより、めっき層中のZn−Mg系化合物をMg2
Zn11にすることによって、めっき層中のZn−Mg系化合物
量を従来法よりも相対的に増加させ、このことによって
従来法よりも優れた耐食性を示すようにしたものであ
る。The development of the present invention will now be described. According to the inventors' research, the steel surface
When Mg-added hot-dip galvanizing is performed, the plating layer is generally constituted by MgZn 2 and Zn-η layers. However, if, after the plating process, the cooling rate until the plating layer solidifies is slowly cooled to 10 ° C./sec or less,
It was found that the plating layer obtained at this time was composed of Mg 2 Zn 11 and a Zn-η layer. By the way, this Mg 2 Zn
11, Zn content is relatively higher than MgZn 2, the ratio of Zn-Mg-based compound on the plated layer Zn-eta layer in order is increased about three times, this Mg 2 Zn 11 exists corrosion resistance Found the fact that it improves. That is, the present invention controls Zn-Mg in the plating layer by controlling the cooling rate after the Mg-added hot-dip galvanizing until the plating layer solidifies to 10 ° C / sec or less, more preferably 5 ° C / sec or less. Mg 2
By using Zn 11 , the amount of the Zn-Mg-based compound in the plating layer is relatively increased as compared with the conventional method, thereby exhibiting better corrosion resistance than the conventional method.
【００１０】上述したように本発明では、溶融亜鉛めっ
き浴中に、所定量のMgを添加する。一般に、亜鉛中にMg
を添加すると、耐食性が向上することは知られている。
しかし、同時に、めっき浴の酸化も激しくなり、めっき
作業を困難にすることも上述したように既知である。こ
のことに対して、本発明では、少量のAlとCa, Beおよび
Liのうちから選ばれる１種以上の成分を複合添加するこ
とにより、めっき浴の酸化を防止するようにした。As described above, in the present invention, a predetermined amount of Mg is added to a hot dip galvanizing bath. Generally, Mg in zinc
It is known that the addition of C improves the corrosion resistance.
However, at the same time, it is also known that the oxidation of the plating bath becomes severe, making the plating operation difficult, as described above. In contrast, in the present invention, a small amount of Al and Ca, Be and
The oxidation of the plating bath is prevented by adding one or more components selected from Li in combination.
【００１１】本発明は、このような着想の下に完成を見
たものであって、まず、めっき浴成分組成, 即ち、溶融
亜鉛めっき皮膜の成分が上述のように限定される理由を
以下に説明する。 (1) めっき層, 浴中のMg：0.2 〜３wt％ めっき層, 浴中にMgを添加する理由は、耐食性を向上さ
せるためであり、その効果は0.2 wt％以上の添加によっ
てZn−Mg系化合物を晶出させることで生ずる。一方、こ
のMg添加量の増加に従って耐食性は向上するものの、Zn
−Mg系共晶点である３wt％を超えると耐食性向上の効果
が飽和することに加え、AlとCa, Be及びLiを添加しても
めっき浴の酸化を抑制することができなくなり、めっき
作業性の劣化を招くので、 0.2〜３wt％の範囲に限定し
た。好ましい範囲は 0.4〜２wt％である。The present invention has been completed under such an idea. First, the reason why the composition of the plating bath, that is, the components of the hot-dip galvanized film are limited as described above, will be described below. explain. (1) Mg in the plating layer and bath: 0.2 to 3 wt% The reason for adding Mg to the plating layer and bath is to improve the corrosion resistance, and the effect is obtained by adding 0.2 wt% or more of Zn-Mg. Produced by crystallizing the compound. On the other hand, although the corrosion resistance improves with the increase in the amount of Mg added, Zn
If the Mg-based eutectic point exceeds 3 wt%, the effect of improving corrosion resistance is saturated, and the addition of Al, Ca, Be and Li cannot suppress the oxidation of the plating bath. Therefore, the content is limited to the range of 0.2 to 3% by weight. The preferred range is 0.4 to 2% by weight.
【００１２】(2) めっき層, 浴中のAl：0.06〜0.25wt％ めっき層, 浴中にAlを添加する理由は、めっき浴の酸化
防止のためである。そのAl濃度を0.06〜0.25wt％とした
理由は、Ca, BeまたはLiのみの添加では、めっき浴の酸
化防止作用が十分でない。また、被めっき鋼材とめっき
層とのZn−Fe反応を防止するためには少なくとも0.06wt
％以上のAl添加が必要であり、一方、0.25wt％を超えて
このAlを添加しても、耐食性向上効果は飽和し、また、
めっき浴中でのFe−Al系ドロスの生成が問題となるの
で、0.06〜0.25wt％に限定した。好ましい範囲は 0.1〜
0.25wt％である。(2) Al in plating layer and bath: 0.06 to 0.25 wt% The reason for adding Al to the plating layer and bath is to prevent oxidation of the plating bath. The reason for setting the Al concentration to be 0.06 to 0.25 wt% is that the addition of only Ca, Be or Li does not provide sufficient antioxidant action of the plating bath. Further, in order to prevent the Zn-Fe reaction between the steel material to be plated and the plating layer, at least 0.06 wt.
% Or more of Al is required. On the other hand, even if this Al is added in excess of 0.25 wt%, the effect of improving corrosion resistance is saturated, and
Since the formation of Fe-Al dross in the plating bath poses a problem, the content is limited to 0.06 to 0.25 wt%. The preferred range is 0.1 to
0.25 wt%.
【００１３】(3) めっき層中のCa, Be, Li：0.001 〜0.
01wt％ めっき層中にCa, BeおよびLiのうち少なくとも１種以上
を単独もしくは合計でそれぞれ0.001 wt％以上含有させ
ることとしたのは、Mgを添加しためっき浴中にCa, Be,
Liのうち少なくとも１種を0.001 wt％以上添加すること
によって、Alの添加と協働してめっき浴表面の酸化を防
止することができるからである。なお、この時製造され
る溶融めっき中には、めっき浴中濃度とほぼ同等のCa,
BeおよびLiを含有する。一方、これらの元素を0.01wt％
を超えて添加した場合には、Ca,Be, Liの偏析によって
耐食性が劣化するので、0.001 〜0.01wt％に限定した。
好ましい範囲は 0.005〜0.01wt％である。(3) Ca, Be, Li in the plating layer: 0.001-0.
The reason why at least one of Ca, Be and Li is contained alone or in a total of 0.001 wt% or more in the plating layer is that Ca, Be, and Li are contained in the plating bath containing Mg.
This is because by adding at least one of Li at 0.001 wt% or more, oxidation of the plating bath surface can be prevented in cooperation with the addition of Al. In addition, during the hot-dip plating produced at this time, Ca, almost the same as the concentration in the plating bath,
Contains Be and Li. On the other hand, 0.01wt% of these elements
If added in amounts exceeding 0.001%, the corrosion resistance deteriorates due to the segregation of Ca, Be, and Li. Therefore, the content was limited to 0.001 to 0.01% by weight.
A preferred range is 0.005 to 0.01 wt%.
【００１４】(4) 本発明にかかる溶融めっき鋼材の製造
方法において、とくに溶融亜鉛めっきき処理後の冷却に
当たって、その速度を10℃／sec 以下に限定する理由
は、めっき層中にできるZn−Mg化合物をMg2 Zn11とする
には、10℃／sec 以下とする必要があり、10℃／sec を
超えるような速い冷却速度の下では、めっき層中にでき
るZn−Mg化合物は、MgZn2 となり、Mg2 Zn11に比べると
耐食性が劣化するためである。(4) In the method of manufacturing a hot-dip galvanized steel material according to the present invention, the cooling rate after the hot-dip galvanizing treatment is limited to 10 ° C./sec or less, particularly because the Zn— In order to make the Mg compound Mg 2 Zn 11 , the temperature must be 10 ° C./sec or less. At a high cooling rate exceeding 10 ° C./sec, the Zn—Mg compound formed in the plating layer is MgZn. 2 , which is because the corrosion resistance is deteriorated as compared with Mg 2 Zn 11 .
【００１５】(5) なお、上記(1) 〜(3) の成分組成の溶
融亜鉛めっき浴中で、上記(4) に記載した条件にて鋼材
を溶融めっきした場合、めっき層中の組成は、溶融亜鉛
めっき浴とほぼ同じになる。(5) When a steel material is hot-dip galvanized in a hot-dip galvanizing bath having the above component compositions (1) to (3) under the conditions described in the above (4), the composition in the plating layer is as follows: This is almost the same as a hot-dip galvanizing bath.
【００１６】[0016]
【実施例】被めっき物として、Ｃ：0.002 wt％、Si：0.
01wt％、Mn：0.15wt％、Ｐ：0.013 wt％およびＳ：0.00
7 wt％を含有する冷延鋼板(100mm×200 mm×0.75mm) を
用い、溶融めっきシミュレートラインでめっき前処理と
して有機溶媒、アルカリ電解脱脂の後、15％Ｈ2 ＋Ｎ2
雰囲気中で 820℃, 10sec （昇温, 降温速度は10℃／se
c)の焼鈍を行った後、60ｇ／ｍ2 の溶融亜鉛めっきを行
い、その後引き続き保温炉によって冷却速度を制御し
た。[Example] C: 0.002 wt%, Si: 0.
01 wt%, Mn: 0.15 wt%, P: 0.013 wt% and S: 0.00
Using a cold-rolled steel sheet containing 7 wt% (100mm × 200 mm × 0.75mm), an organic solvent as a pretreatment coating with hot dipping simulation Trine, after alkaline electrolytic degreasing, 15% H 2 + N 2
820 ° C, 10sec in atmosphere (temperature rise / fall rate is 10 ℃ / se
After performing the annealing of c), hot-dip galvanizing of 60 g / m 2 was performed, and then the cooling rate was controlled by a heating furnace.
【００１７】このようにして得られためっき処理材につ
いて、それの耐食性をSST(塩水噴霧試験) ５％赤錆発生
までの日数及び板重量の減少にて評価した。また、エポ
キシ系カチオン電着塗装後（20μｍ) 、クロスカットを
施し、SST 30日後のクロスカット部の膨れ幅を評価し、
耐ブリスター性を評価した。さらに、めっき層の密着性
評価として、 180°曲げ試験によるZn剥離量をZnの蛍光
Ｘ線カウント数で評価し３段階に評価した。これらのめ
っき条件およびその評価結果を表１, 表２にまとめて示
す。With respect to the plated material thus obtained, its corrosion resistance was evaluated based on the number of days until the occurrence of SST (salt spray test) 5% red rust and the reduction of the plate weight. Also, after the epoxy-based cationic electrodeposition coating (20 μm), a cross cut was performed, and the swollen width of the cross cut portion after 30 days of SST was evaluated.
The blister resistance was evaluated. Further, as an evaluation of the adhesion of the plating layer, the amount of Zn peeling by a 180 ° bending test was evaluated by the number of Zn fluorescent X-rays, and evaluated in three stages. Tables 1 and 2 collectively show these plating conditions and evaluation results.
【００１８】[0018]
【表１】 [Table 1]
【００１９】[0019]
【表２】 [Table 2]
【００２０】上掲の表に示す結果から明らかなように、
従来例のように、溶融Znめっき中にMgを添加することに
よって、めっき層中にZn−η相および／またはMgZn2 を
生成させたもの（No.3〜６）では、Mg無添加のもの（N
o.1) に比較すると耐食性は向上するが、Mg添加によっ
てめっき浴の酸化が激しくなることがわかる。なお、N
o.2に示すように、Mg＜0.2 wt％では、Zn−Mg系化合物
は晶出しないので耐食性の改善は期待できない。また、
従来例はいずれも、冷却速度が10℃／sec を超えるので
Mg2Zn11の晶出がなく、Mg＞0.2 wt％のもの（No.3〜
６）は／浴の酸化が激しいことがわかった。これに対
し、本発明法（No.7〜25) に従って、溶融Znめっき浴中
に所定量のMgを添加し、さらにAlならびにCa, Beおよび
Liのうちの少なくとも１種を添加し、めっき後めっき層
が凝固完了するまでの冷却速度を10℃／秒以下に制御し
て溶融めっきを行った例では、めっき層はいずれもZn−
η相およびMg2 Zn11によって構成され、めっき層の密着
性が良好である。しかも、従来のMg添加溶融Znめっきよ
りもさらに、裸耐食性, 塗装後耐ブリスター性の良好な
Mg添加溶融Znめっき鋼材が得られることがわかる。ま
た、めっき浴の酸化防止にも有効であった。なお、この
実施例においては、めっき付着量60ｇ／ｍ2 の供試材を
用いたが、発明者らの研究によれば、めっき付着量10ｇ
／ｍ2 以上のものでも良好な耐食性を得られることが確
かめられており、自動車等の製造に供する防錆鋼板とし
ては、めっき付着量が20〜70ｇ／ｍ2 が好ましい。As is clear from the results shown in the above table,
As in the conventional example, by adding Mg to the hot-dip Zn plating, Zn-η phase and / or MgZn 2 was generated in the plating layer (No. 3 to 6), and no Mg was added. (N
Compared with o.1), the corrosion resistance is improved, but it can be seen that the oxidation of the plating bath becomes more severe with the addition of Mg. Note that N
As shown in o.2, if Mg <0.2 wt%, the Zn-Mg-based compound does not crystallize, so that improvement in corrosion resistance cannot be expected. Also,
In all of the conventional examples, the cooling rate exceeds 10 ° C / sec.
No Mg 2 Zn 11 crystallization, Mg> 0.2 wt% (No. 3 ~
6) It was found that the oxidation of the bath was severe. On the other hand, according to the method of the present invention (Nos. 7 to 25), a predetermined amount of Mg was added to the hot-dip Zn plating bath, and Al, Ca, Be and
In the example in which at least one of Li was added and the cooling rate until the solidification of the plating layer after plating was completed was controlled to 10 ° C./sec or less and the hot-dip plating was performed, the plating layers were all Zn—
It is composed of the η phase and Mg 2 Zn 11 and has good adhesion of the plating layer. Moreover, compared to the conventional Mg-added hot-dip Zn plating, it has better bare corrosion resistance and blister resistance after painting.
It can be seen that a Mg-added hot-dip galvanized steel material can be obtained. It was also effective in preventing oxidation of the plating bath. In this example, a test material having a coating weight of 60 g / m 2 was used.
It has been confirmed that good corrosion resistance can be obtained even when the corrosion resistance is not less than / m 2, and a rust-proof steel sheet to be used in the production of automobiles and the like preferably has a coating weight of 20 to 70 g / m 2 .
【００２１】[0021]
【発明の効果】以上説明したように本発明によれば、高
耐食性, 高耐摩耗性の溶融亜鉛めっきを容易に製造する
ことができ、それ故に溶融亜鉛めっき鋼材の使用環境や
用途を一層拡大することができる。As described above, according to the present invention, hot-dip galvanized steel having high corrosion resistance and high wear resistance can be easily produced, and therefore the use environment and applications of hot-dip galvanized steel can be further expanded. can do.
フロントページの続き (72)発明者 加藤 千昭 千葉県千葉市中央区川崎町１番地 川崎 製鉄株式会社鉄鋼開発・生産本部 鉄鋼 研究所内 (72)発明者 望月 一雄 千葉県千葉市中央区川崎町１番地 川崎 製鉄株式会社鉄鋼開発・生産本部 鉄鋼 研究所内 (56)参考文献 特開 昭56−41358（ＪＰ，Ａ) 特開 昭56−41359（ＪＰ，Ａ) 特開 平５−306445（ＪＰ，Ａ) 特開 平４−246158（ＪＰ，Ａ) 特開 平６−212386（ＪＰ，Ａ) 特開 平４−2759（ＪＰ，Ａ) 特公 昭54−33223（ＪＰ，Ｂ１) (58)調査した分野(Int.Cl.7，ＤＢ名) C23C 2/00 - 2/40 Continuing from the front page (72) Inventor Chiaki Kato 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Iron and Steel Research Laboratory, Steel Development Co., Ltd. (72) Inventor Kazuo Mochizuki 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba (56) References JP-A-56-41358 (JP, A) JP-A-56-41359 (JP, A) JP-A-5-306445 (JP, A) JP-A-4-246158 (JP, A) JP-A-6-212386 (JP, A) JP-A-4-2759 (JP, A) JP-B-54-33223 (JP, B1) (58) Fields investigated (Int.Cl. 7 , DB name) C23C 2/00-2/40
Claims (2)
を含み、そしてCa,BeおよびLiのうちから選ばれる１種
または２種以上を 0.001〜0.01wt％含有し、残部がZnか
らなる組成を有し、かつ組織がZn−η相及びMg2 Zn11か
らなる溶融めっき層を、鋼材表面に有することを特徴と
する耐食性に優れたZn−Mg−Al系溶融めっき鋼材。(1) Mg: 0.2 to 3 wt%, Al: 0.06 to 0.25 wt%
And containing 0.001 to 0.01 wt% of one or more selected from Ca, Be and Li, the balance being Zn, and the structure being composed of a Zn-η phase and Mg 2 Zn. A Zn-Mg-Al-based hot-dip galvanized steel material having excellent corrosion resistance, characterized by having a hot-dip layer made of 11 on the surface of the steel material.
材を、Mg：0.2 〜3wt％、Al：0.06〜0.25wt％を含み、
かつCa, BeおよびLiのうちから選ばれる１種または２種
以上を 0.001〜0.01wt％含有し、残部が実質的にZnから
なる溶融めっき浴に浸漬して溶融めっきし、その後めっ
き相が凝固するまで10℃／sec.以下の冷却速度で徐冷す
ることを特徴とする耐食性に優れたZn−Mg−Al系溶融め
っき鋼材の製造方法。2. A hot-dip galvanizing method, wherein the steel material to be plated contains 0.2 to 3 wt% of Mg and 0.06 to 0.25 wt% of Al.
In addition, one or more selected from Ca, Be and Li are contained in 0.001 to 0.01 wt%, and the rest is immersed in a hot-dip plating bath substantially made of Zn to perform hot-dip plating, and thereafter the plating phase is solidified. A method for producing a Zn-Mg-Al-based hot-dip galvanized steel excellent in corrosion resistance, characterized by gradually cooling at a cooling rate of 10 ° C / sec.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19696894A JP3357471B2 (en) | 1994-08-22 | 1994-08-22 | Zn-Mg-Al-based hot-dip galvanized steel excellent in corrosion resistance and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19696894A JP3357471B2 (en) | 1994-08-22 | 1994-08-22 | Zn-Mg-Al-based hot-dip galvanized steel excellent in corrosion resistance and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0860324A JPH0860324A (en) | 1996-03-05 |
| JP3357471B2 true JP3357471B2 (en) | 2002-12-16 |
Family
ID=16366650
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19696894A Expired - Lifetime JP3357471B2 (en) | 1994-08-22 | 1994-08-22 | Zn-Mg-Al-based hot-dip galvanized steel excellent in corrosion resistance and method for producing the same |
Country Status (1)
| Country | Link |
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| JP (1) | JP3357471B2 (en) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6235410B1 (en) | 1996-12-13 | 2001-05-22 | Nisshin Steel Co., Ltd. | Hot-dip Zn-Al-Mg coated steel sheet excellent in corrosion resistance and surface appearance and process for the production thereof |
| JP2000064011A (en) * | 1998-08-13 | 2000-02-29 | Nippon Steel Corp | HOT DIP Zn-Mg-Al PLATED STEEL SHEET EXCELLENT IN FLAWING RESISTANCE |
| DE10039375A1 (en) * | 2000-08-11 | 2002-03-28 | Fraunhofer Ges Forschung | Corrosion-protected steel sheet and process for its manufacture |
| KR100498092B1 (en) * | 2000-11-02 | 2005-07-01 | 주식회사 포스코 | corrosion resistant Zinc plating bath and products |
| KR100568349B1 (en) * | 2001-12-20 | 2006-04-05 | 주식회사 포스코 | Hot-dip galvanized steel sheet with zinc alloy to be excellent corrosion resistance and surface appearance |
| KR20030054469A (en) * | 2001-12-26 | 2003-07-02 | 주식회사 포스코 | Zn-Al-Mg Alloy Coating Steel Sheet Having Superior Corrosion Resistance And Plating Workability |
| JP4171232B2 (en) * | 2002-03-08 | 2008-10-22 | 新日本製鐵株式会社 | Hot-dip galvanized steel with excellent surface smoothness |
| EP1693477A1 (en) * | 2005-02-22 | 2006-08-23 | ThyssenKrupp Steel AG | Coated steel plate |
| KR20120075235A (en) | 2010-12-28 | 2012-07-06 | 주식회사 포스코 | Hot dip zn alloy plated steel sheet having excellent anti-corrosion and method for manufacturing the steel sheet using the same |
| KR101417304B1 (en) | 2012-07-23 | 2014-07-08 | 주식회사 포스코 | HOT DIP Zn ALLOY PLATED STEEL SHEET HAVING EXCELLENT ANTI-CORROSION AND SURFACE APPEARANCE AND METHOD FOR MANUFACTURING THE STEEL SHEET USING THE SAME |
| KR101439694B1 (en) | 2012-12-26 | 2014-09-12 | 주식회사 포스코 | Zn-Mg ALLOY COATED STEEL SHEET AND MEHTDOD FOR MANUFACTURING THE SAME |
| KR101560933B1 (en) * | 2013-12-20 | 2015-10-15 | 주식회사 포스코 | High corrosion resistant galvannealed steel sheet with excellent surface property, method for manufacturing the steel sheet and zinc plating solution for maunfacturing the steel sheet |
| KR101758529B1 (en) * | 2014-12-24 | 2017-07-17 | 주식회사 포스코 | Zn ALLOY PLATED STEEL SHEET HAVING EXCELLENT PHOSPHATABILITY AND SPOT WELDABILITY AND METHOD FOR MANUFACTURING SAME |
| CN105671469B (en) * | 2016-03-22 | 2018-08-21 | 首钢集团有限公司 | A kind of hot-dip steel and its manufacturing method |
| KR102142766B1 (en) * | 2018-08-31 | 2020-08-07 | 주식회사 포스코 | Hot-dip galvanized steel sheet having excellent corrosion resistance and workability and method for manufacturing thereof |
| KR102359203B1 (en) * | 2018-12-19 | 2022-02-08 | 주식회사 포스코 | Zinc alloy coated steel having excellent corrosion resistance and surface property, method for manufacturing the same |
| TW202405204A (en) * | 2022-06-10 | 2024-02-01 | 日商日本製鐵股份有限公司 | Zn-Al-Mg-based hot-dipped steel sheet |
| WO2023238941A1 (en) * | 2022-06-10 | 2023-12-14 | 日本製鉄株式会社 | Hot dip-coated steel sheet |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5433223B2 (en) * | 1973-12-15 | 1979-10-19 | ||
| JPS5641359A (en) * | 1979-09-10 | 1981-04-18 | Nippon Steel Corp | Manufacture of corrosion resistant zinc alloy-plated steel products by galvanizing |
| JPS5641358A (en) * | 1979-09-10 | 1981-04-18 | Nippon Steel Corp | Manufacture of corrosion resistant zinc alloy-plated steel products |
| JPH042759A (en) * | 1990-04-19 | 1992-01-07 | Nippon Steel Corp | Production of galvannealed steel sheet and hot-dip galvanizing bath |
| JPH04246158A (en) * | 1991-01-29 | 1992-09-02 | Nippon Steel Corp | Manufacture of alloy plated steel wire having excellent surface characteristic and corrosion resistance |
| JP2971243B2 (en) * | 1992-05-01 | 1999-11-02 | 新日本製鐵株式会社 | Method for producing high strength galvannealed steel sheet containing P |
| JPH06212386A (en) * | 1993-01-13 | 1994-08-02 | Kawasaki Steel Corp | Hot dip galvannealed steel excellent in corrosion resistance and peeling resistance and its production |
-
1994
- 1994-08-22 JP JP19696894A patent/JP3357471B2/en not_active Expired - Lifetime
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| Publication number | Publication date |
|---|---|
| JPH0860324A (en) | 1996-03-05 |
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