WO2021199373A1 - Dispositif de production de tôle d'acier plaquée à base d'al-zn-mg-si en fusion et procédé de production de tôle d'acier revêtu - Google Patents

Dispositif de production de tôle d'acier plaquée à base d'al-zn-mg-si en fusion et procédé de production de tôle d'acier revêtu Download PDF

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Publication number
WO2021199373A1
WO2021199373A1 PCT/JP2020/015013 JP2020015013W WO2021199373A1 WO 2021199373 A1 WO2021199373 A1 WO 2021199373A1 JP 2020015013 W JP2020015013 W JP 2020015013W WO 2021199373 A1 WO2021199373 A1 WO 2021199373A1
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Prior art keywords
steel sheet
plating bath
mass
plating
plated steel
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PCT/JP2020/015013
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English (en)
Japanese (ja)
Inventor
大居　利彦
純久 岩野
洋平 佐藤
史嵩 菅野
飛山　洋一
英徳 三宅
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Ｊｆｅ鋼板株式会社
Ｊｆｅスチール株式会社
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Priority to PCT/JP2020/015013 priority Critical patent/WO2021199373A1/fr
Publication of WO2021199373A1 publication Critical patent/WO2021199373A1/fr

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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
    • C23C2/12—Aluminium or alloys based thereon

Definitions

  • the present invention relates to a method for producing a molten Al-Zn-Mg-Si-based plated steel sheet and a method for producing a coated steel sheet, which suppresses the occurrence of surface defects caused by dross in a plating bath and has excellent surface appearance. be.
  • the hot-dip galvanized steel sheet has both the sacrificial corrosion resistance of Zn and the high corrosion resistance of Al, so it exhibits the highest corrosion resistance among hot-dip galvanized steel sheets.
  • Patent Document 1 discloses a molten Al-Zn-based galvanized steel sheet containing 25 to 75% by mass of Al in the plating layer. Due to its excellent corrosion resistance, hot-dip Al-Zn plated steel sheets have been in increasing demand in recent years, mainly in the fields of building materials such as roofs and walls that are exposed to the outdoors for a long period of time, and in the fields of civil engineering and construction such as guard rails, wiring pipes, and soundproof walls. ing.
  • the plating layer of the molten Al-Zn-based plated steel sheet is composed of a main layer and an alloy layer existing at the interface between the base steel sheet and the main layer. It is composed of a dendrite portion of the -Al phase) and a portion of the remaining dendrite gap (interdendrite), and has a structure in which a plurality of ⁇ -Al phases are laminated in the film thickness direction of the plating layer. Due to such a characteristic film structure, the corrosion progress path from the surface is complicated, so that corrosion does not easily reach the underlying steel sheet, and the hot-dip Al-Zn-based plated steel sheet has the same plating layer thickness as hot-dip zinc. Excellent corrosion resistance can be achieved compared to plated steel sheets.
  • Patent Document 2 includes an Al-Zn-Si alloy containing Mg in a plating layer.
  • the Al-Zn-Si alloy is an alloy containing 45 to 60% by weight of elemental aluminum, 37 to 46% by weight of elemental zinc and 1.2 to 2.3% by weight of elemental silicon, and the Mg concentration is 1 to 5%.
  • Al-Zn-Mg-Si plated steel sheets containing Sr, which are% by weight, are disclosed.
  • Patent Document 3 aims to enhance the corrosion resistance and the protective action after the base steel sheet is exposed by containing a certain amount of Mg and Ca in the plating layer.
  • the hot-dip Al-Zn-based plated steel sheet is disclosed.
  • Mg: 1 to 15%, Si: 2 to 15%, Zn: 11 to 25% are contained in mass%, and the balance forms a coating layer composed of Al and unavoidable impurities.
  • Al-based plated steel sheets with improved corrosion resistance of flat plates and end faces are disclosed by defining the size of Mg 2 Si phase present in the plated layer.
  • Mg is an element that is easily oxidized, so that it can be used in the plating bath.
  • the contained Mg sometimes generated an oxide (top dross) near the bath surface.
  • an intermetallic compound (bottom dross) containing iron that is unevenly distributed in the plating bath or at the bottom may be generated with the passage of time. It has been desired to suppress the occurrence of these dross as much as possible because they adhere to the surface of the plating layer and cause convex defects and impair the appearance of the surface of the plating layer.
  • the present invention suppresses the occurrence of surface defects and wrinkle-like defects caused by dross in the plating bath, and manufactures a molten Al-Zn-Mg-Si-based plated steel sheet having excellent surface appearance. It is an object of the present invention to provide a method and a method for manufacturing a coated steel sheet.
  • the present inventors reduced the melting point of the plating bath as the amount of Mg and Si contained in the plating bath, and the contents of Mg and Si and the melting point were quantified.
  • an intermetallic compound bottom dross
  • oxides near the bath surface of the plating bath and iron that is unevenly distributed in or at the bottom of the plating bath, and wrinkle-like defects. It was noted that the oxide generated on the surface of the plating layer, which is the cause, tends to be generated as the bath temperature of the plating bath is higher.
  • the composition of the plating bath was set within a certain range, and the content of Mg and Si and the bath temperature of the plating bath were "plating bath temperature (° C) ⁇ 620-4.5M Mg-".
  • the temperature on the surface and inside of the plating bath can be lowered to an appropriate range. It has been found that surface defects caused by dross and bottom dross and wrinkle-like defects caused by oxides formed on the surface of the plating layer can be suppressed, and excellent surface appearance can be realized.
  • the present invention has been made based on the above findings, and the gist thereof is as follows.
  • 1. A step of immersing the base steel plate in a plating bath containing Al: 45 to 65% by mass, Si: 1.2 to 4% by mass and Mg: 1 to 6% by mass and having a composition in which the balance is Zn and unavoidable impurities.
  • Plating bath temperature (° C) ⁇ 620-4.5M Mg -5.5M Si ... (1)
  • M Mg Mg content in the plating bath (mass%)
  • M Si Si content in the plating bath (mass%)
  • the plating bath further contains one or more selected from Cr, Mn, V, Mo, Ti, Ca, Ni, Co, Sb and B in a total of 0.01 to 10% by mass.
  • a step of forming a coating film directly or via an intermediate layer on a molten Al-Zn-Mg-Si-based plated steel sheet obtained by the production method according to any one of claims 1 to 3 is provided.
  • a manufacturing method can be provided.
  • the method for producing a molten Al-Zn-Mg-Si-based plated steel sheet of the present invention (hereinafter, may be simply referred to as "the method for producing the present invention") will be described.
  • the method for producing a molten Al-Zn-Mg-Si-based plated steel sheet of the present invention contains Al: 45 to 65% by mass, Si: 1.2 to 4% by mass and Mg: 1 to 6% by mass, and the balance is Zn and A step of immersing the base steel plate in a plating bath having a composition consisting of unavoidable impurities is provided.
  • the bath temperature of the plating bath satisfies the following formula (1) and is 585 ° C. or lower.
  • the method for producing a hot-dip Al-Zn-Mg-Si-based plated steel sheet of the present invention is not particularly limited, but a continuous hot-dip plating facility is usually adopted from the viewpoint of manufacturing efficiency and quality stability.
  • the type of base steel sheet used for the molten Al-Zn-Mg-Si-based plated steel sheet of the present invention is not particularly limited.
  • a hot-rolled steel sheet or steel strip obtained by pickling and descaling, or a cold-rolled steel plate or steel strip obtained by cold-rolling them can be used.
  • the conditions of the pretreatment step and the annealing step are not particularly limited, and any method can be adopted.
  • the plating bath contains Al: 45 to 65% by mass, Si: 1.2 to 4% by mass, and Mg: 1 to 6% by mass.
  • the balance has a composition consisting of Zn and unavoidable impurities.
  • the Al content in the plating bath is 45 to 65% by mass, preferably 50 to 60% by mass, in view of the balance between the corrosion resistance of the obtained molten Al-Zn-Mg-Si plated steel sheet and the operational surface. be.
  • the Al content in the plating bath is at least 45% by mass, dendrite solidification of Al sufficiently occurs in the formed plating layer.
  • the main layer of the plating layer (the layer formed on the interfacial alloy layer in the plating layer) mainly contains Zn in a hypersaturation, and the dendrite solidified portion of Al (the dendrite portion of the ⁇ -Al phase) remains.
  • the Al content in the plating bath exceeds 65% by mass, the content of Zn having a sacrificial anticorrosion effect on Fe decreases, and the corrosion resistance deteriorates. Therefore, the Al content in the plating bath is 65% by mass or less.
  • the Al content in the plating bath is 60% by mass or less, the amount of plating adhered is small, and even when the underlying steel sheet is easily exposed, it has a sacrificial anticorrosion effect on Fe, which is sufficient. Excellent corrosion resistance can be obtained. Therefore, the Al content in the plating bath is preferably 60% by mass or less.
  • Si in the plating bath has the purpose of suppressing the growth of the interfacial alloy layer formed at the interface with the underlying steel sheet in the obtained molten Al-Zn-Mg-Si-based plated steel sheet, and thus has corrosion resistance and workability. It is added to the plating bath for the purpose of improving the above, and is inevitably contained in the main layer of the plating layer. Specifically, when Si is contained in the plating bath and the plating treatment is performed, the steel sheet is immersed in the plating bath, and at the same time, Fe on the surface of the steel sheet and Al or Si in the bath undergo an alloying reaction to form a plating layer. Fe-Al and / or Fe-Al-Si compounds are produced in.
  • this Fe-Al-Si based interfacial alloy layer By forming this Fe-Al-Si based interfacial alloy layer, the growth of the interfacial alloy layer can be suppressed.
  • the Si content in the plating bath is 1.2% by mass or more
  • Fe elution into the plating bath through the interfacial alloy layer which is a source of bottom dross, can be suppressed due to the effect of suppressing the growth of the interfacial alloy layer of Si. , The occurrence of the above-mentioned bottom dross can be further suppressed.
  • the Si content in the plating bath is set to 4% or less. Further, from the same viewpoint, the Si content in the plating bath is preferably 2 to 4%, more preferably 2.3 to 3.5%.
  • the plating bath contains 1 to 6% by mass of Mg.
  • Mg is contained in the corrosion product, the stability of the corrosion product is improved, and corrosion occurs. As a result of the delay in progress, the effect of improving corrosion resistance can be obtained.
  • Mg present in the main layer of the plating layer combines with the above-mentioned Si to form Mg 2 Si. This Mg 2 Si dissolves in the early stage when the plated steel sheet is corroded, so Mg is contained in the corrosion product.
  • Mg in this corrosion product has the effect of thickening on the surface of the corrosion product and densifying the corrosion product, and can improve the stability of the corrosion product and the barrier property against foreign corrosion factors.
  • the reason why the Mg content in the plating bath is 1% by mass or more is that by setting the Mg content to 1% by mass or more, a large amount of Mg 2 Si can be generated in the plating layer, which is excellent. The effect of delaying corrosion can be obtained.
  • the freezing point depression due to the increase in the amount of Mg makes it possible to further lower the plating bath temperature, the above-mentioned formation of top dross and bottom dross and wrinkles caused by oxides formed on the surface of the plating layer are formed.
  • the Mg content in the plating bath is preferably 2% by mass or more, and more preferably 3% by mass or more.
  • the reason why the Mg content is 6% by mass or less is that when the Mg content exceeds 6%, in addition to the saturation of the corrosion resistance improving effect, an oxide of Mg is formed, and the above-mentioned top dross is generated. This is because it is likely to occur.
  • the Mg content in the plating bath is preferably 5% by mass or less.
  • the Mg content in the plating bath is 3% by mass or more, it is possible to improve the corrosion resistance after painting.
  • a dense and stable oxide film of Al 2 O 3 is immediately formed around the ⁇ -Al phase, and protection by this oxide film is formed. Due to the action, the solubility of the ⁇ -Al phase is much lower than that of the Zn-rich phase in the interdrenated light.
  • the Mg content in the plating bath is 3% by mass or more.
  • the Mg 2 Si phase and Mg-Zn compounds (MgZn 2 , Mg 32 (Al, Zn) 49) precipitated in the interdent light Etc.) dissolve in the initial stage of corrosion, and Mg is incorporated into the corrosion product.
  • the Mg-containing corrosion products are very stable, which suppresses corrosion at the initial stage, which is a problem in the case of coated steel sheets using conventional Al-Zn-based plated steel sheets as a base. It is possible to suppress large swelling of the coating film due to selective corrosion.
  • the molten Al—Zn-based plated steel sheet containing Mg in the plating layer exhibits excellent post-coating corrosion resistance.
  • the amount of Mg in the plating bath is less than 3% by mass, the amount of Mg that dissolves during corrosion is small, and the corrosion resistance after painting may not be improved.
  • the Mg content in the plating bath exceeds 6% by mass, not only the effect is saturated, but also the Mg compound is corroded, and the solubility of the entire plating layer is excessively increased, resulting in corrosion formation. Even if the object is stabilized, its dissolution rate increases, so that a large swelling may occur and the corrosion resistance after coating may deteriorate. Therefore, in order to stably obtain excellent post-painting corrosion resistance, it is preferable that the Mg content in the plating bath is 6% by mass or less.
  • the plating bath preferably further contains 0.01 to 0.2% by mass of Sr. This is because the inclusion of Sr in the plating bath suppresses the occurrence of wrinkle-like defects and further improves the surface appearance of the obtained molten Al-Zn-Mg-Si plated steel sheet.
  • the wrinkle-like defect is a wrinkle-like uneven defect formed on the surface of the plating layer, and is observed as a whitish streak on the surface of the plating layer. Since such streak-like defects contain an oxide of Mg, they are likely to occur when a large amount of Mg is added to the plating bath.
  • the molten Al-Zn-Mg-Si-based plated steel sheet of the present invention by containing Sr in the plating bath, Sr is added to the surface layer of the plating layer of the molten Al-Zn-Mg-Si-based plated steel sheet.
  • Sr is added to the surface layer of the plating layer of the molten Al-Zn-Mg-Si-based plated steel sheet.
  • the Sr content in the plating bath is preferably 0.01% by mass or more, in order to more reliably obtain the effect of suppressing the occurrence of the above-mentioned streak-like defects. From the same viewpoint, the Sr content in the plating bath is more preferably 0.05% by mass or more. On the other hand, the Sr content in the plating bath is preferably 0.2% by mass or less. This is because if the Sr content is too high, the oxidation of Mg is suppressed too much, so that the corrosion products caused by the above-mentioned Mg 2 Si are less likely to be produced, and sufficient corrosion resistance may not be obtained. From the same viewpoint, the Sr content in the plating bath is preferably 0.15% by mass or less.
  • the plating bath has a total of 0.01 to 10% by mass of Cr, Mn, V. , Mo, Ti, Ca, Ni, Co, Sb and B, preferably one or more selected from the above.
  • the total content of the above-mentioned components is set to 0.01 to 10% by mass because a sufficient corrosion delay effect can be obtained and the effect is not saturated.
  • the plating layer contains a base steel plate component that is taken into the plating by the reaction between the plating bath and the base steel plate during the plating process, and unavoidable impurities in the plating bath.
  • Fe may be contained in a maximum of about 2% as the base steel sheet component incorporated in the plating.
  • Examples of the types of unavoidable impurities in the plating bath other than Fe include Cu and Zr. It is not possible to distinguish between what is taken in from the base steel sheet and what is in the plating bath and quantify the Fe during plating.
  • the total content of unavoidable impurities is not particularly limited, but from the viewpoint of maintaining the corrosion resistance and uniform solubility of the plating, the total amount of unavoidable impurities excluding Fe is preferably 1% by mass or less.
  • the molten Al-Zn-Mg-Si-based plated steel sheet obtained by the production method of the present invention exists on the interfacial alloy layer existing at the interface with the underlying steel sheet and the interfacial alloy layer. It has a plating layer composed of a main layer. Although the composition of the main layer is slightly lower in Al and Si on the interfacial alloy layer side, it is almost the same as the composition of the plating bath as a whole. Therefore, the composition of the main layer can be controlled with high accuracy by controlling the composition of the plating bath.
  • the method for producing a molten Al-Zn-Mg-Si-based plated steel sheet of the present invention includes a step of immersing the base steel sheet in the plating bath, and the bath temperature of the plating bath satisfies the following formula (1). Moreover, the temperature is 585 ° C. or lower. Plating bath temperature (° C) ⁇ 620-4.5M Mg -5.5M Si ... (1)
  • FIG. 1 shows the relationship between the dissolved amount of Al and Fe in the Al-Fe-Zn alloy and the temperature.
  • the -Zn ternary alloy phase diagram it is a cross section when Zn: 30% by weight. From this figure, it can be seen that the higher the temperature, the higher the solubility of Fe.
  • the melting point of the plating bath decreases as Mg and Si are contained in the plating bath. Therefore, the content of Mg and Si in the plating bath and the melting point of the plating bath A quantitative relationship was derived. Further, in consideration of the fact that the lower the plating bath temperature, the more the generation of the top dross and the bottom dross is suppressed, the above-mentioned content of Mg and Si in the plating bath and the melting point of the plating bath. By combining the quantitative relationship with the temperature at which the dross can be suppressed, the occurrence of top dross and bottom dross can be significantly reduced as compared with the conventional case, and the occurrence of surface defects caused by these dross can be suppressed.
  • the plating bath temperature exceeds 585 ° C.
  • the plating bath temperature satisfies the above-mentioned quantitative relationship and then the bath temperature of the plating bath. Must be below 585 ° C.
  • Mg is an element that is easily oxidized, so that an oxide layer may be formed thickly on the surface of the plated layer before the plated layer solidifies. be.
  • the oxide layer on the surface that has already solidified also moves, and then the plating layer solidifies, resulting in wrinkle-like defects. Therefore, there is also a problem that the appearance of the plated steel sheet is deteriorated.
  • the occurrence of the oxide layer on the surface of the plating layer can be suppressed by lowering the bath temperature of the plating bath to some extent.
  • the bath temperature of the plating bath is set to 585 ° C. or lower while satisfying the formula (1), as in the condition for suppressing the occurrence of surface defects caused by the dross described above. , The generation of an oxide layer that causes wrinkle-like defects is suppressed.
  • the temperature of the steel sheet at the time of entering the plating bath is added by 20 ° C. from the bath temperature of the plating bath (plating).
  • the bath temperature is preferably + 20 ° C.) or less.
  • the approach plate temperature of the steel sheet is preferably not less than the temperature obtained by adding 10 ° C. from the bath temperature of the plating bath (plating bath temperature + 10 ° C.), and is not more than the bath temperature of the plating bath. preferable.
  • the production method of the present invention is not particularly limited except for the bath temperature and the approach plate temperature at the time of hot-dip plating, and a hot-dip Al-Zn-Mg-Si-based plated steel sheet can be manufactured according to a conventional method. ..
  • the method for producing a coated steel sheet of the present invention is directly or directly on the molten Al-Zn-Mg-Si-based plated steel sheet obtained by the above-mentioned method for producing a molten Al-Zn-Mg-Si-based plated steel sheet of the present invention. It is characterized by comprising a step of forming a coating film via an intermediate layer. Since the molten Al-Zn-Mg-Si plated steel sheet obtained by the production method of the present invention is used, it is possible to suppress the occurrence of surface defects due to dross in the plating bath and realize excellent surface appearance. ..
  • the type of the coating film and the method for forming the coating film are not particularly limited and can be appropriately selected according to the required performance.
  • a forming method such as roll coater coating, curtain flow coating, or spray coating can be mentioned.
  • After applying a paint containing an organic resin it is possible to form a coating film by heating and drying by means such as hot air drying, infrared heating, and induction heating.
  • the intermediate layer is not particularly limited as long as it is a layer formed between the molten Al-Zn-Mg-Si-based plated steel sheet and the coating film.
  • examples thereof include a chemical conversion coating and a primer such as an adhesive layer.
  • the chemical conversion treatment film is formed by, for example, a chromate treatment or a chromium-free chemical conversion treatment in which a chromate treatment liquid or a chromium-free chemical conversion treatment liquid is applied and a drying treatment is performed at a steel sheet temperature of 80 to 300 ° C. without washing with water. It is possible.
  • These chemical conversion treatment coatings may be single-layered or multi-layered, and in the case of multiple layers, a plurality of chemical conversion treatments may be sequentially performed.
  • samples 1 to 51 Using a cold-rolled steel sheet having a thickness of 0.5 mm produced by a conventional method as a base steel sheet, samples 1 to 51 of molten Al-Zn-Mg-Si-based plated steel sheets were produced in a continuous hot-dip plating facility.
  • the composition of the plating bath used for production is almost the same as the composition of the plating layer of each sample shown in Table 1, the measured bath temperature of the plating bath and the right side of the calculated formula (1).
  • the values of (620-4.5M Mg- 5.5M Si ) are shown in Table 1.
  • a method for producing a molten Al-Zn-Mg-Si-based plated steel sheet which suppresses the occurrence of surface defects and wrinkle-like defects caused by dross in a plating bath and has excellent surface appearance, and coating.
  • a method for manufacturing a steel sheet can be provided.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
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Abstract

L'objet de la présente invention est de fournir un procédé de production d'une tôle d'acier plaquée à base d'Al-Zn-Mg-Si en fusion qui présente un excellent aspect de surface par suppression de l'apparition de défauts de type plis et de défauts de surface attribués aux écumes dans les bains de placage.　Afin d'atteindre cet objet, la présente invention est caractérisée en ce qu'elle comprend une étape d'immersion d'une tôle d'acier de substrat dans un bain de placage ayant une composition contenant de 45 à 65 % en masse d'Al, de 1,2 à 4 % en masse de Si et de 1 à 6 % en masse de Mg, le complément étant constitué de Zn et d'impuretés inévitables. La présente invention est également caractérisée en ce que la température de bain du bain de placage satisfait à la formule (1) et est inférieure ou égale à 585 °C. 　(1) : Température du bain de placage (°C) ≤ de 620 - 4,5 MMg - 5,5 MSi. MMg : Quantité contenue (% en masse) de Mg dans le bain de placage. MSi : Quantité contenue (% en masse) de Si dans le bain de placage.
PCT/JP2020/015013 2020-04-01 2020-04-01 Dispositif de production de tôle d'acier plaquée à base d'al-zn-mg-si en fusion et procédé de production de tôle d'acier revêtu WO2021199373A1 (fr)

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PCT/JP2020/015013 WO2021199373A1 (fr) 2020-04-01 2020-04-01 Dispositif de production de tôle d'acier plaquée à base d'al-zn-mg-si en fusion et procédé de production de tôle d'acier revêtu

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000328214A (ja) * 1999-05-19 2000-11-28 Nisshin Steel Co Ltd 表面外観の良好な高耐食性Ｍｇ含有溶融Ｚｎ−Ａｌ系合金めっき鋼板
WO2010082678A1 (fr) * 2009-01-16 2010-07-22 新日本製鐵株式会社 MATÉRIAU D'ACIER REVÊTU D'UN ALLIAGE Zn-Al-Mg-Si-Cr EN BAIN FONDU AYANT UNE EXCELLENTE RÉSISTANCE À LA CORROSION
JP2011514935A (ja) * 2008-03-13 2011-05-12 ブルースコープ・スティール・リミテッド 金属被覆スチールストリップ
WO2013011824A1 (fr) * 2011-07-20 2013-01-24 新日鐵住金株式会社 Panneau

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000328214A (ja) * 1999-05-19 2000-11-28 Nisshin Steel Co Ltd 表面外観の良好な高耐食性Ｍｇ含有溶融Ｚｎ−Ａｌ系合金めっき鋼板
JP2011514935A (ja) * 2008-03-13 2011-05-12 ブルースコープ・スティール・リミテッド 金属被覆スチールストリップ
WO2010082678A1 (fr) * 2009-01-16 2010-07-22 新日本製鐵株式会社 MATÉRIAU D'ACIER REVÊTU D'UN ALLIAGE Zn-Al-Mg-Si-Cr EN BAIN FONDU AYANT UNE EXCELLENTE RÉSISTANCE À LA CORROSION
WO2013011824A1 (fr) * 2011-07-20 2013-01-24 新日鐵住金株式会社 Panneau

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