JP2756547B2 - Hot-dip Zn-based plating of hard-to-plate steel sheet - Google Patents
Hot-dip Zn-based plating of hard-to-plate steel sheetInfo
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- JP2756547B2 JP2756547B2 JP1001089A JP1001089A JP2756547B2 JP 2756547 B2 JP2756547 B2 JP 2756547B2 JP 1001089 A JP1001089 A JP 1001089A JP 1001089 A JP1001089 A JP 1001089A JP 2756547 B2 JP2756547 B2 JP 2756547B2
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- plating
- hot
- dip
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Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、屋根・壁などの建築部材、自動車用構造部
材などに使用する耐食性に優れた溶融Znベースめっき鋼
板の製造方法に関する。Description: TECHNICAL FIELD The present invention relates to a method for producing a hot-dip galvanized steel sheet having excellent corrosion resistance used for building members such as roofs and walls, structural members for automobiles, and the like.
近年、大気環境の酸性化や海上構造物の建設などによ
り、建築部材の耐食性向上が強く要求されるようになっ
てきた。また、自動車の構造部材の場合には、積雪の多
い地方で使用されている凍結防止用の塩類散布による塩
害腐食も大きな問題となっている。In recent years, due to acidification of the atmospheric environment and construction of marine structures, there has been a strong demand for improved corrosion resistance of building components. Further, in the case of structural members of automobiles, salt damage caused by spraying of salts for preventing freezing, which is used in a region with a lot of snow, is also a serious problem.
現在、このような用途に使用される材料として溶融Zn
ベースめっき鋼板が用いられている。Currently, molten Zn is used as a material for such applications.
Base plated steel sheets are used.
一般に、溶融Znベースめっき鋼板は、厳しい加工を受
け、めっき層が破断して鋼素地が局部的に露出しても、
鋼素地とめっき層との間でZnの犠牲防食作用があるの
で、ある程度は鋼素地の腐食が抑制される。しかし、局
部的に露出した鋼素地近傍のめっき層の腐食速度が平坦
部に比べ大きくなるので、結果として早期に鋼素地の腐
食が始まる。In general, hot-dip Zn-based plated steel sheets are subjected to severe processing, even if the plating layer breaks and the steel base is locally exposed,
Since there is a sacrificial anticorrosion effect of Zn between the steel base and the plating layer, the corrosion of the steel base is suppressed to some extent. However, the corrosion rate of the plating layer near the locally exposed steel base becomes higher than that of the flat part, and as a result, the corrosion of the steel base starts early.
したがって、このように、めっき層が加工により割れ
て局部的に露出した鋼素地の耐食性を向上させるには、
めっき母材自身の耐食性を向上させる必要がある。Therefore, in order to improve the corrosion resistance of the steel base material, which is partially exposed due to cracking of the plating layer by processing,
It is necessary to improve the corrosion resistance of the plating base material itself.
一般に、鋼板の耐食性を向上させるには、鋼中Si、Cr
を単独あるいは複合添加することがよく知られている。
しかし、鋼中にSiあるいはCrを、含有した鋼板を連続め
っきライン（例えば、センジミアの装置）で溶融めっき
する場合には、ライン内の焼鈍工程でSiあるいはCrが鋼
板表層へ濃化してめっきぬれ性を阻害し、点状のめっき
欠陥（不めっき）を多数発生する。その結果、このめっ
き欠陥部を起点とした腐食が生じ、かえって溶融Znベー
スめっき鋼板の耐食性が低下してしまう。Generally, in order to improve the corrosion resistance of steel sheets, Si, Cr
It is well known that these are added alone or in combination.
However, when a steel sheet containing Si or Cr in the steel is hot-dip galvanized by a continuous plating line (for example, a Sendzimir device), Si or Cr concentrates on the surface layer of the steel sheet during the annealing process in the line, causing wet plating. In many cases, many spot-like plating defects (non-plating) occur. As a result, corrosion originating from the plating defect occurs, and the corrosion resistance of the hot-dip Zn-based plated steel sheet is rather reduced.
そこで、SiあるいはCrを含有した鋼板に、あらかじめ
Ni系電気めっきを行なって、溶融めっきラインの焼鈍工
程で生じるSiやCrの表層濃化を抑制する溶融めっき法が
提案されている。（特開昭60−262950、特開昭61−1478
65） しかしながら、このようなニッケルプレめっきは非常
に高価であるとともに、溶融Znベースめっき後のめっき
層中にNiが残存し、めっき層自身の耐食性を低下させる
という問題がある。Therefore, a steel sheet containing Si or Cr must be
A hot-dip plating method has been proposed in which Ni-based electroplating is performed to suppress the surface layer enrichment of Si and Cr generated in the annealing step of a hot-dip plating line. (JP-A-60-262950, JP-A-61-1478
65) However, such nickel pre-plating is very expensive, and has a problem that Ni remains in the plating layer after the hot-dip Zn base plating, thereby deteriorating the corrosion resistance of the plating layer itself.
本発明は、Siおよび／またはCrを含有する鋼板に溶融
Znベースめっきをする時に発生する点状めっき欠陥を防
止することを課題とし、課題解決に関し、鋭意研究した
結果、Siおよび／またはCrを含有する鋼板にＢ（ホウ
素）含有率が0.001〜0.3wt％のFe−Ｂ合金電気めっきを
施した後、溶融Znベースめっきすることにより、点状の
めっき欠陥の発生を防止し、かつ耐食性に優れた溶融Zn
ベースめっき鋼板が得られるという知見を得た。The present invention is intended to melt a steel sheet containing Si and / or Cr.
Aimed at preventing spot-like plating defects generated when performing Zn-based plating, and as a result of intensive research on solving the problem, the steel sheet containing Si and / or Cr has a B (boron) content of 0.001 to 0.3 wt. % Fe-B alloy electroplating followed by hot-dip Zn base plating to prevent spot-like plating defects from occurring and to provide excellent corrosion resistance
We obtained the knowledge that a base plated steel sheet can be obtained.
上記課題は、 Siおよび／またはCrを含有する鋼板に、Ｂ（ホウ素）
含有率が0.001〜0.3wt％のFe−Ｂ合金電気めっきを附着
量0.05〜5g/m2施した後、Al:0.1〜60％、残部Znおよび
不可避的不純物よりなる溶融Znベースめっき浴を用いて
溶融めっきすることを特徴とする雛めっき鋼板の様相Zn
ベースめっき法によって達成される。The above-mentioned problem is solved by adding B (boron) to a steel sheet containing Si and / or Cr.
After the content of the Fe-B alloy electroplating 0.001～0.3Wt% subjected Fuchaku amount 0.05~5g / m 2, Al: 0.1~60 %, using a hot-dip Zn base plating bath consisting of the remainder Zn and unavoidable impurities Of hot rolled steel sheet characterized by hot-dip galvanizing
Achieved by base plating.
本発明の方法において、溶融めっき用Znベース金属
は、0.1〜60％のAlを含むことができる。単味ZnはFe素
地と脆弱な金属間化合物を形成しやすいが、0.1％以上
のAlを含有させることによって、防止できる。しかしAl
含有量が60％を越えるとZnの犠牲防食作用が低下する。In the method of the present invention, the Zn base metal for hot-dip plating may include 0.1 to 60% of Al. Plain Zn easily forms a fragile intermetallic compound with the Fe base, but can be prevented by containing 0.1% or more of Al. But Al
If the content exceeds 60%, the sacrificial anticorrosive action of Zn decreases.
以下、本発明を図面を参照して具体的に説明する。 Hereinafter, the present invention will be specifically described with reference to the drawings.
第１図および第２図は、溶融Znベースのめっき性に及
ぼす被めっき鋼板中のSiおよびCr含有率の影響をFe−Ｂ
合金電気めっきの有無で比較した結果である。ここで溶
融Znベースめっきのめっき性は、各鋼板（50×150mm）
を還元性雰囲気｛50％H2−N2、露点（D.P.）＝−60℃｝
でZn−0.18％Al浴（470℃）に２秒間浸漬し、引き上げ
て得ためっき製品に発生した点状めっき欠陥の個数で判
定したものである。Fig. 1 and Fig. 2 show the effect of the Si and Cr contents in the steel sheet to be plated on the hot-dip Zn-based plating properties using Fe-B.
These are the results of comparison with and without alloy electroplating. Here, the plating property of hot-dip Zn base plating is as follows for each steel plate (50 × 150mm)
The reducing atmosphere {50% H 2 -N 2, dew point (DP) = - 60 ℃}
The sample was immersed in a Zn-0.18% Al bath (470 ° C.) for 2 seconds, pulled up, and determined by the number of spot-like plating defects generated in the plated product.
評点5:点状めっき欠陥の発生のないもの 評点4:直径1mm未満の点状めっき欠陥５個以内のもの 評点3:直径1mm未満の点状めっき欠陥５個を超えるもの 評点2:直径1mm未満の点状めっき欠陥多数発生するか、
または直径1mm以上の点状めっき欠陥発生するもの 評点1:直径1mm以上の点状めっき欠陥多数発生するもの 第１図および第２図から明らかなように、鋼中のSi含
有率が0.3％を超え、あるいはCr含有率が2.0％を超える
と、SiあるいはCr含有率の増加とともに溶融Znベースめ
っき性が低下し、著しい不めっきを発生する。これに対
して、Fe−Ｂ合金電気めっきを施した場合には、電気め
っきしない場合と比較して非常に良好な溶融Znベースめ
っき性が得られることがわかる。このように、Fe−Ｂ合
金電気めっき後、溶融めっきする本発明の溶融めっき法
は、特に、鋼中のSi含有率が0.3wt％以上、あるいはCr
含有率が2.0wt％以上の難めっき鋼板の溶融めっき性向
上に非常に効果がある。また、第１図および第２図か
ら、鋼中のSi含有率あるいはCr含有率が増加するにした
がって、Fe−Ｂ合金めっきのめっき付着量を増加させな
いと溶融Znベースめっき性が不安定となることがわか
る。したがって、被めっき鋼板のSi含有率あるいはCr含
有率によって溶融めっき性が良好となるFe−Ｂ合金電気
めっきの限界めっき付着量が変化するが、経済性および
実用性の観点から、そのめっき付着量範囲は0.05〜5g/m
2が好ましい。Score 5: No spot plating defects occurred Score 4: Less than 5 spot plating defects less than 1 mm in diameter Score 3: More than 5 spot plating defects less than 1 mm in diameter Score 2: Less than 1 mm in diameter Many spot plating defects
Or, a spot plating defect with a diameter of 1 mm or more is generated. Rating 1: A lot of spot plating defects with a diameter of 1 mm or more are generated. As is clear from FIGS. 1 and 2, the Si content in the steel is 0.3%. If it exceeds or the Cr content exceeds 2.0%, the hot-dip Zn base plating property decreases as the Si or Cr content increases, and significant non-plating occurs. On the other hand, when Fe-B alloy electroplating is applied, it is found that very good hot-dip Zn base plating properties can be obtained as compared with the case where electroplating is not performed. As described above, the hot-dip plating method of the present invention in which hot-dip plating is performed after Fe-B alloy electroplating is performed, particularly when the Si content in steel is 0.3 wt% or more, or
It is very effective in improving hot-dipability of hard-to-plate steel sheets with a content of 2.0 wt% or more. Further, from FIGS. 1 and 2, as the Si content or the Cr content in the steel increases, unless the coating weight of the Fe—B alloy plating is increased, the molten Zn base plating becomes unstable. You can see that. Therefore, the critical plating weight of Fe-B alloy electroplating, in which the hot-dipability becomes good, changes depending on the Si content or Cr content of the steel sheet to be plated. Range is 0.05-5g / m
2 is preferred.
被めっき鋼板中のSi含有率ならびにCr含有率について
は、それぞれの含有率が増加しても、Fe−Ｂ合金めっき
付着量を増加させれば良好な溶融めっき性が得られる
が、Si含有率が2.0wt％を、またCr含有率が30wt％を超
えると溶融めっき鋼板自身の加工性が低下するので、鋼
中のSi含有率は2.0wt％以下、鋼中のCr含有率は30wt％
以下が望ましい。なお、被めっき鋼中に含有されるＣ、
Mn、Ｐ、Ｓ、Alは、直接、溶融めっき性に影響を及ぼさ
ないのでそれぞれの含有率を限定する理由はないが、め
っき鋼板としての総合的な品質特性を考慮した場合、Ｃ
≦0.10wt％、Mn≦2.0wt％、Ｐ≦0.05wt％、Ｓ≦0.05wt
％、Al≦3wt％にすることが望ましい。また、鋼中の添
加元素として、Ti、Nb、Ｖ、Ｂ、Mo、Cuなどが知られて
いるが、これらの元素も溶融めっき性に影響を及ぼさな
いので必要に応じて添加することは可能である。Regarding the Si content and Cr content in the steel sheet to be plated, even if the respective contents increase, good hot-dipability can be obtained by increasing the Fe-B alloy plating adhesion amount. If the Cr content exceeds 2.0 wt% and the Cr content exceeds 30 wt%, the workability of the hot-dip coated steel sheet itself decreases, so the Si content in the steel is 2.0 wt% or less and the Cr content in the steel is 30 wt%.
The following is desirable. In addition, C contained in the steel to be plated,
Since Mn, P, S, and Al do not directly affect hot-dipability, there is no reason to limit the content of each. However, considering the overall quality characteristics of a plated steel sheet, C
≦ 0.10wt%, Mn ≦ 2.0wt%, P ≦ 0.05wt%, S ≦ 0.05wt
%, Al ≦ 3 wt%. Also, Ti, Nb, V, B, Mo, Cu, etc. are known as additional elements in steel, but these elements do not affect the hot-dipability, so they can be added as necessary. It is.
Fe−Ｂ合金電気めっきは硫酸塩浴または塩化浴いずれ
でも実施できる。また、ＢをFe中に含有させるには、Fe
めっき浴にホウ酸、メタホウ酸、可溶性メタホウ酸、可
溶性４ホウ酸塩、テトラフルオロホウ酸塩などのホウ素
化合物を１種または２種以上添加し、浴のpHを１〜３に
調整して電気めっきすればよい。The Fe-B alloy electroplating can be performed in either a sulfate bath or a chloride bath. Further, in order to contain B in Fe, Fe
One or more boron compounds such as boric acid, metaboric acid, soluble metaboric acid, soluble tetraborate, and tetrafluoroborate are added to the plating bath, and the pH of the bath is adjusted to 1 to 3 so that electric power is applied. What is necessary is just to plate.
第３図は、Fe−Ｂ合金電気めっきを1.0g/m2施したAIS
I409ステンレス鋼板（Cr含有率:11.0wt％、Si含有率:0.
6wt％）の溶融Znベースめっき性に及ぼすFe−Ｂ合金め
っき層中のＢ含有率の影響を調査した結果である。な
お、溶融Znベースめっき性の判定は第１図の場合と同じ
である。Figure 3 is a Fe-B alloy electroplating 1.0 g / m 2 applied was AIS
I409 stainless steel plate (Cr content: 11.0wt%, Si content: 0.
It is the result of investigating the effect of the B content in the Fe-B alloy plating layer on the hot-dip Zn base plating property (6 wt%). The determination of hot-dip Zn base plating property is the same as in the case of FIG.
第３図から明らかなように、Fe−Ｂ合金電気めっき層
中のＢ含有率が0.001wt％以上では溶融Znベースめっき
性が著しく向上し、さらに0.3wt％を超えても溶融Znベ
ースめっき性向上効果は飽和する。したがって、Fe−Ｂ
合金電気めっきのＢ含有率を0.001〜0.3wt％の範囲に限
定した。このように、Fe電気めっきに比べてFe−Ｂ合金
電気めっきはめっきの均一付き廻り性の点で優れてい
る。As is clear from FIG. 3, when the B content in the Fe—B alloy electroplating layer is 0.001 wt% or more, the hot-dip Zn base plating property is remarkably improved. The enhancement effect saturates. Therefore, Fe-B
The B content of the alloy electroplating was limited to the range of 0.001 to 0.3 wt%. Thus, Fe-B alloy electroplating is superior to Fe electroplating in terms of uniformity of plating.
次に、実施例により本発明を説明する。 Next, the present invention will be described with reference to examples.
実施例１ （１）めっき母材 化学成分として、C:0.06wt％、Si、0.65wt％、Mn:0.3
3wt％、P:0.024wt％、S:0.010wt％、Cr:17.8wt％、残部
Feおよび不可避的不純物より成る板厚0.8mmの冷間圧延S
US430ステンレス鋼板をめっき母材とした。Example 1 (1) Plating base material As chemical components, C: 0.06 wt%, Si, 0.65 wt%, Mn: 0.3
3wt%, P: 0.024wt%, S: 0.010wt%, Cr: 17.8wt%, balance
0.8mm thick cold rolled S consisting of Fe and unavoidable impurities
US430 stainless steel plate was used as the plating base material.
（２）溶融Znベースめっき鋼体の製造 前記めっき母材を常法にしたがって脱脂した後、第１
表に示しためっき液組成およびめっき条件でFe−Ｂ合金
電気めっきを行なった。Fe−Ｂ合金電気めっきのめっき
付着量およびＢ含有率は、通電時間およびめっき液中へ
のホウ酸添加量により調整した。なお、Fe−Ｂ合金電気
めっきと比較するため、塩化Ni浴でNi電気めっきも行な
った。(2) Manufacture of hot-dip Zn-based plated steel body
Electroplating of Fe-B alloy was performed under the plating solution composition and plating conditions shown in the table. The plating adhesion amount and the B content in the Fe-B alloy electroplating were adjusted by the energizing time and the amount of boric acid added to the plating solution. In addition, Ni electroplating was also performed in a Ni chloride chloride bath for comparison with Fe-B alloy electroplating.
Fe−Ｂ合金電気めっきしためっき母材は50vol.％H2−
被N2雰囲気で800℃、30秒予熱した後、同じ雰囲気下に
ある0.18〜55％、Al−Zn浴に２秒浸漬して溶融Znベース
めっきを行ない、めっき層中のAl濃度の異なる、付着量
が片面50g/m2の溶融Znベースめっき鋼板を作製した。50 vol.% H 2 −
After preheating at 800 ° C for 30 seconds in an atmosphere of N 2 , immersion in an Al-Zn bath for 2 seconds in a 0.18-55% Al-Zn bath under the same atmosphere to perform hot-dip Zn base plating. A hot-dip Zn-based plated steel sheet having an adhesion amount of 50 g / m 2 on one side was produced.
（３）溶融Znベースめっき性 このようにして得られた溶融Znベースめっき鋼板の表
面（50mm×100mmの範囲）に発生した点状めっき欠陥の
個数にて評価した。（評価基準は先に記載した通り） （４）促進腐食試験 前記溶融Znベースめっき鋼板をJIS Z2248に基づいて2
t曲げ加工した後JIS Z2371に基づく塩水噴霧試験を３時
間、引き続いて50℃、熱風乾燥を１時間という工程を１
サイクルとした促進腐食試験に供した。 (3) Hot-dip Zn base plating properties The evaluation was made based on the number of spot-like plating defects generated on the surface (range of 50 mm x 100 mm) of the hot-dip Zn-based plated steel sheet thus obtained. (Evaluation criteria are as described above.) (4) Accelerated corrosion test The hot-dip Zn-based plated steel sheet was subjected to 2 based on JIS Z2248.
After bending, salt spray test based on JIS Z2371 for 3 hours, followed by 50 ° C and hot air drying for 1 hour.
The cycle was subjected to an accelerated corrosion test.
それぞれの腐食程度は、促進試験3000サイクル後の腐
食生成物および残存被覆層を溶解、除去して母材の最大
侵食深さを測定して評価した。Each corrosion degree was evaluated by dissolving and removing the corrosion product and the residual coating layer after 3000 cycles of the accelerated test and measuring the maximum erosion depth of the base material.
第２表は、促進試験3000サイクル後の各試料の腐食状
態を母材の最大侵食深さについてまとめたものである。 Table 2 summarizes the corrosion state of each sample after 3000 cycles of the accelerated test with respect to the maximum erosion depth of the base material.
めっき欠陥の著しい本発明外のおよび比較例溶融Znベ
ースめっき鋼板No.1,2,5,13,14,15,18,26,27,28,31,39,
40,41,44,52,53,54,57,65,66,70,78,79,80,83,85,91,9
2,93,96,104,105,106,109,117は鋼板を貫通した孔食を
起こしているのに対して、Ｂ含有率が0.001〜0.3wt％の
Fe−Ｂ合金電気めっきを0.05〜5g/m2施した後溶融Znベ
ースめっきした本発明の溶融めっき鋼板No.3,4,6,8〜1
0,16,17,19,21〜23,29,30,32,34〜36,42,43,45,47〜49,
55,56,58,60〜62,68,69,71,73〜75,81,82,84,86〜88,9
4,95,97,99〜101,107,108,110,112〜114は平坦部、2t曲
げ加工部とも母材の侵食が小さい。また、Ni電気めっき
した後、溶融Znベースめっきした試料No.11,12,24,25,3
7,38,50,51,63,64,76,77,89,90,102,103,115,116は、Ni
めっき付着量が増加するにしたがって点状めっき欠陥の
発生が抑えられるが、母材の侵食深さは本発明の方法で
作製した溶融Znベースめっき鋼板より大きい。Ni電気め
っきした後、溶融Znベースめっきした試料の場合はZnベ
ースめっき層の腐食速度が著しく大きくなるので、結果
としてめっき母材の侵食深さもおおきくなる。Hot-dip Zn-based coated steel sheets No. 1, 2, 5, 13, 14, 15, 18, 26, 27, 28, 31, 39, out of the present invention with remarkable plating defects
40,41,44,52,53,54,57,65,66,70,78,79,80,83,85,91,9
2,93,96,104,105,106,109,117 cause pitting corrosion through the steel plate, while B content is 0.001-0.3wt%.
No. 3, 4, 6, 8 to 1 of the hot-dip steel sheet of the present invention, which was subjected to Fe-B alloy electroplating of 0.05 to 5 g / m 2 and then hot-dip Zn base plating.
0,16,17,19,21-23,29,30,32,34-36,42,43,45,47-49,
55,56,58,60-62,68,69,71,73-75,81,82,84,86-88,9
In 4,95,97,99 to 101,107,108,110,112 to 114, the erosion of the base material is small in both the flat portion and the 2t bent portion. Also, after Ni electroplating, hot-dip Zn-based plated samples No. 11, 12, 24, 25, 3
7,38,50,51,63,64,76,77,89,90,102,103,115,116 is Ni
As the amount of plating increases, the generation of spot-like plating defects is suppressed, but the erosion depth of the base material is larger than that of the hot-dip Zn-based plated steel sheet produced by the method of the present invention. In the case of the sample plated with hot-dip Zn after the Ni electroplating, the corrosion rate of the Zn-base plated layer is significantly increased, and as a result, the erosion depth of the plated base material is also increased.
本発明により、Siおよび／またはCrを含有する鋼板に
Ｂ含有率が0.001〜0.3wt％のFe−Ｂ合金電気めっきを施
した後溶融Znベースめっきする本発明の溶融めっき法
は、溶融めっき時に発生する点状めっき（不めっき）を
防止し、耐食性の優れた溶融Znベースめっき鋼板を得る
ことができる。According to the present invention, the hot-dip plating method of the present invention in which a steel sheet containing Si and / or Cr is subjected to electroplating of a Fe-B alloy having a B content of 0.001 to 0.3 wt% and then hot-dip Zn base plating, It is possible to obtain a hot-dip Zn-based plated steel sheet that prevents spot plating (non-plating) from occurring and has excellent corrosion resistance.
このFe−Ｂ合金電気めっきによるめっき性の向上は、
溶融Znベースめっきのみならず、溶融アルミニウムめっ
きにも同様に適用できる。The improvement of plating properties by this Fe-B alloy electroplating
The present invention can be applied not only to hot-dip Zn base plating but also to hot-dip aluminum plating.
第１図および第２図は、溶融Znベースめっき性に及ぼす
被めっき鋼板中のSiおよびCr含有率の影響をFe−Ｂ合金
電気めっきの有無で比較した結果を示す図、第３図は溶
融Znベースめっき性に及ぼすFe−Ｂ合金めっき層中のＢ
の含有率の影響をFe−Ｂ合金の付着量で比較した結果を
示す図である。FIGS. 1 and 2 show the results of comparing the effect of the Si and Cr contents in the steel sheet to be plated on the hot-dip Zn base plating properties with and without Fe-B alloy electroplating, and FIG. Effect of B in Fe-B alloy plating layer on Zn base plating property
FIG. 5 is a graph showing the results of comparison of the effect of the content of Fe on the amount of Fe-B alloy deposited.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭64−28351（ＪＰ，Ａ) 特開 平２−38549（ＪＰ，Ａ) 特開 平１−287260（ＪＰ，Ａ) 特開 平２−145756（ＪＰ，Ａ) 特開 昭63−235485（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) C23C 2/02 C23C 2/06──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-64-28351 (JP, A) JP-A-2-38549 (JP, A) JP-A-1-287260 (JP, A) JP-A-2-28 145756 (JP, A) JP-A-63-235485 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) C23C 2/02 C23C 2/06
Claims (1)
めっきを附着量0.05〜5g/m2施した後； Al:0.1〜60％残部Znおよび不可避的不純物よりなる溶融
Znベースめっき浴を用いて溶融めっきすることを特徴と
する雛めっき鋼板の溶融Znベースめっき法。1. A steel sheet containing Si and / or Cr, which is subjected to electroplating of Fe-B alloy having a B (boron) content of 0.001 to 0.3 wt% in an amount of 0.05 to 5 g / m 2 ; Melting consisting of 0.1-60% balance Zn and unavoidable impurities
A hot-dip Zn-based plating method for hot-plated steel sheets, which is hot-dip plating using a Zn-based plating bath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1001089A JP2756547B2 (en) | 1989-01-20 | 1989-01-20 | Hot-dip Zn-based plating of hard-to-plate steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1001089A JP2756547B2 (en) | 1989-01-20 | 1989-01-20 | Hot-dip Zn-based plating of hard-to-plate steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02194156A JPH02194156A (en) | 1990-07-31 |
| JP2756547B2 true JP2756547B2 (en) | 1998-05-25 |
Family
ID=11738431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1001089A Expired - Lifetime JP2756547B2 (en) | 1989-01-20 | 1989-01-20 | Hot-dip Zn-based plating of hard-to-plate steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2756547B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0571636B1 (en) * | 1991-12-06 | 1998-03-04 | Kawasaki Steel Corporation | Method of manufacturing molten zinc plated steel plates having few unplated portions |
| JPH0688251A (en) * | 1992-09-10 | 1994-03-29 | Nippon Steel Corp | Si containing high strength galvannealed steel sheet |
| WO1997045569A1 (en) * | 1996-05-31 | 1997-12-04 | Kawasaki Steel Corporation | Plated steel plate |
-
1989
- 1989-01-20 JP JP1001089A patent/JP2756547B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02194156A (en) | 1990-07-31 |
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