Process for manufacturing electro-galvanized steel sheet excellent in
paint adherence
    1.
    发明授权
    Process for manufacturing electro-galvanized steel sheet excellent in paint adherence 失效
    用于制造涂料粘附性优异的电镀锌钢板的方法

    公开(公告)号:US4290860A

    公开(公告)日:1981-09-22

    申请号:US156580

    申请日:1980-06-05

    IPC分类号: C25D5/26 C25D3/56 C25D7/06

    CPC分类号: C25D3/565

    摘要: In an acidic zinc sulfate and iron sulfate electro-galvanizing bath, of which a pH value has been adjusted to under 1.5, containing iron from 20 to 90 wt. % relative to the total amount of metals capable of being electro-deposited in said acidic electro-galvanizing bath, a steel sheet is subjected to an electro-galvanizing treatment, with an electric current having a current density of from 10 to 40 A/dm.sup.2 to form on said steel sheet an electro-galvanized layer in a weight of from 1 to 50 g/m.sup.2, containing iron from 5 to 35 wt. % relative to the total weight of the electro-galvanized layer.

    摘要翻译: 在其中将pH值调节至低于1.5的酸性硫酸锌和硫酸铁电镀浴中,含有20-90重量%的铁。 相对于能够在所述酸性电镀浴中电沉积的金属的总量的%,对钢板进行电镀锌处理,电流密度为10〜40A / dm 2 在所述钢板上形成重量为1至50g / m 2的电镀层,其中铁含量为5至35wt。 相对于电镀锌层的总重量。

    Dual layer-coated electro-galvanized steel sheet for coating with
excellent bare corrosion resistance, corrosion resistance after coating
and formability
    2.
    发明授权
    Dual layer-coated electro-galvanized steel sheet for coating with excellent bare corrosion resistance, corrosion resistance after coating and formability 失效
    用于涂层的双层涂层电镀锌钢板具有优异的耐腐蚀性,涂层后的耐腐蚀性和成型性

    公开(公告)号:US4252866A

    公开(公告)日:1981-02-24

    申请号:US87107

    申请日:1979-10-22

    摘要: An electro-galvanized steel sheet for coating excellent in bare corrosion resistance, corrosion resistance after coating and formability, which comprises: a steel sheet; a first electro-galvanized layer, as a lower layer, in an amount of from 5 to 120 g/m.sup.2 per side, formed on at least one surface of said steel sheet, said first electro-galvanized layer comprising either an electro-galvanized layer consisting essentially of zinc or a compound electro-galvanized layer consisting essentially of zinc, cobalt and at least one of chromium, indium and zirconium; and a second electro-galvanized layer, as an upper layer, in an amount of from 0.2 to 10 g/m.sup.2 per side, formed on said first electro-galvanized layer, said second electro-galvanized layer consisting essentially of an alloy layer of zinc and from 1 to 60 wt. % iron. Said electro-galvanized steel sheet for coating is adapted to serve particularly for external, underside and closed structures of an automobile.

    摘要翻译: 一种用于在耐腐蚀性,涂布后的耐腐蚀性和成形性上涂覆的电镀锌钢板,其包括:钢板; 形成在所述钢板的至少一个表面上的每侧5〜120g / m 2的作为下层的第一电镀锌层,所述第一电镀层包括电镀锌层 基本上由锌或由锌,钴和铬,铟和锆中的至少一种组成的化合物电镀锌层组成; 以及形成在所述第一电镀锌层上的每面为0.2至10g / m 2的上层的第二电镀锌层,所述第二电镀锌层基本上由锌合金层组成 和1至60wt。 %铁。 所述用于涂覆的电镀锌钢板适用于特别用于汽车的外部,底部和封闭结构。

    Process for manufacturing electro-galvanized steel strip
    3.
    发明授权
    Process for manufacturing electro-galvanized steel strip 失效
    电镀锌钢带生产工艺

    公开(公告)号:US4325790A

    公开(公告)日:1982-04-20

    申请号:US231131

    申请日:1981-02-03

    CPC分类号: C25D5/08 C25D3/565 C25D7/0685

    摘要: In a process for manufacturing an electro-galvanized steel strip, which comprises: moving a steel strip in an acidic electro-galvanizing bath containing cobalt and chrominum in parallel with the plane of at least one anode plate to subject said steel strip to an electro-galvanizing treatment, thereby forming, on at least one surface of said steel strip, an electro-galvanized layer excellent in bare corrosion resistance and corrosion resistance after chromating; the improvement characterized by: keeping the cobalt content in said electro-galvanizing bath within the range of from 8 to 30 g/l, as converted into metallic cobalt, the chromium content in said electro-galvanizing bath within the range of from 0.1 to 1.5 g/l, as converted into metallic chromium, and the temperature of said electro-galvanizing bath within the range of from 35.degree. to 60.degree. C.; and, flowing said electro-galvanizing bath between said steel strip and said anode plate at a flow velocity of at least 0.35 m/sec in a direction at right angles to the travelling direction of said steel strip.

    摘要翻译: 一种电镀锌钢带的制造方法,其特征在于,包括:使含有钴和铬的酸性电镀浴中的钢带与至少一个阳极板的平面平行地移动, 镀锌处理,从而在所述钢带的至少一个表面上形成镀铬后的耐腐蚀性和耐腐蚀性优异的电镀锌层; 其特征在于:将所述电镀浴中的钴含量保持在8至30g / l的范围内,转化为金属钴,所述电镀浴中的铬含量在0.1至1.5的范围内 g / l,转化为金属铬,所述电镀浴的温度在35〜60℃的范围内。 并且在所述钢带和所述阳极板之间以与所述钢带的行进方向成直角的方向以至少0.35m / sec的流速流动所述电镀浴。

    Chromated electro-galvanized steel sheet excellent in corrosion
resistance and process for manufacturing same
    4.
    发明授权
    Chromated electro-galvanized steel sheet excellent in corrosion resistance and process for manufacturing same 失效
    耐腐蚀性优异的镀铬电镀钢板及其制造方法

    公开(公告)号:US4064320A

    公开(公告)日:1977-12-20

    申请号:US662618

    申请日:1976-03-01

    摘要: A chromated electro-galvanized steel sheet is manufactured by electro-galvanizing a steel sheet in an acidic galvanizing bath containing zinc with or without specified amounts of cobalt, or with specified amounts of cobalt and with at least one of chromium (Cr.sup.+3, Cr.sup.+6 or Cr.sup.+3 and Cr.sup.+6) and zirconium; then electro-galvanizing in a zinc-based galvanizing bath containing specified amounts of at least one of chromium (Cr.sup.+3, Cr.sup.+6 or Cr.sup.+3 and Cr.sup.+6), tin and indium; and chromating the resulting steel sheet.

    摘要翻译: 铬酸盐电镀钢板是通过在含有或不含有规定量的钴的锌的酸性镀锌浴中或者用规定量的钴和至少一种铬(Cr + 3,Cr + 6或Cr + 3和Cr + 6)和锆; 然后在含有规定量的铬(Cr + 3,Cr + 6或Cr + 3和Cr + 6),锡和铟中的至少一种的锌基镀锌浴中电镀锌; 并对所得钢板进行铬化。

    Method for manufacturing an electro-galvanized steel sheet excellent in
bare corrosion resistance and adaptability to chromating, and product
thereof
    5.
    发明授权
    Method for manufacturing an electro-galvanized steel sheet excellent in bare corrosion resistance and adaptability to chromating, and product thereof 失效
    制造耐腐蚀性优良且耐铬酸盐化的电镀锌钢板的制造方法及其制造方法

    公开(公告)号:US4048381A

    公开(公告)日:1977-09-13

    申请号:US644905

    申请日:1975-12-29

    摘要: In a Zn-ion based acidic galvanizing bath containing at least one additive selected from the group consisting of:______________________________________ (a) Cr.sup.3.sup.+ 50 - 700 ppm, (b) Cr.sup.6.sup.+ 50 - 500 ppm, (c) Cr.sup.3.sup.+ and Cr.sup.6.sup.+ 50 - 700 ppm, in which Cr.sup.6.sup.+ being 500 ppm at the maximum, (d) In ion 10 - 3,000 ppm, and (e) Zr ion 10 - 2,500 ppm; and: (f) Co ion 50 - 10,000 ppm, ______________________________________ A steel sheet is subjected to an electro-galvanizing treatment to form a first galvanizing layer on the surface thereof; and then, said electro-galvanized steel sheet with said first galvanizing layer formed thereon to a conventional chromate treatment.With a view to further increasing the amount of deposited chromate on said chromated electro-galvanized steel sheet, said electro-galvanized steel sheet with said first galvanizing layer formed thereon is subjected to another electro-galvanizing treatment in a conventional acidic galvanizing bath containing zinc only to form a second galvanizing layer consisting exclusively of at least 0.2 g/m.sup.2 zinc on said first galvanizing layer; and then, said electro-galvanized steel sheet with said first and said second galvanizing layers formed thereon is subjected to a conventional chromate treatment.

    摘要翻译: 在含有选自以下的至少一种添加剂的Zn-离子型酸性镀锌浴中:(a)Cr 3+ 50-700ppm,(b)Cr 6+ 50-500ppm,}(c )Cr3 +和Cr6 + 50 - 700ppm,其中Cr6 +最大为500ppm,(d)离子10-3000ppm,(e)Zr离子10-2,500 ppm; }和:}(f)Co离子50-10,000ppm,}钢板被放置在电化学处理中以形成其表面上的第一加氢层; 然后,将电铸钢板与首先形成的镀层组合使用,以传统的铬酸盐处理。

    Iron-zinc alloy electro-galvanized steel sheet having a plurality of
iron-zinc alloy coatings

    公开(公告)号:US4543300A

    公开(公告)日:1985-09-24

    申请号:US604993

    申请日:1984-04-27

    IPC分类号: C25D5/26 C25D3/56 C25D5/10

    摘要: An iron-zinc alloy electro-galvanized steel sheet having a plurality of iron-zinc alloy coatings, which comprises: at least one iron-zinc alloy coating as the lower layer, formed on the surface of a steel sheet, and at least two iron-zinc alloy coatings as the upper layer, formed on the at least one iron-zinc alloy coating as the lower layer. The ratio of iron content to the coating weight of each of the at least one iron-zinc alloy coating as the lower layer is within the range of from 1 to 15 wt. %, and the total coating weight of the at least one iron-zinc alloy coating as the lower layer is within the range of from 1 to 50 g/m.sup.2 per side of the steel sheet. The ratio of iron content to the coating weight of each of the at least two iron-zinc alloy coatings as the upper layer is over 15 wt. %, the ratio of iron content to the coating weight gradually increases from the innermost coating toward the outermost coating of the at least two iron-zinc alloy coatings as the upper layer, the difference in the ratio or iron content to the coating weight between two adjacent coatings of the at least two iron-zinc alloy coatings as the upper layer is within the range of from 1 to 15 wt. %, and the total coating weight of the at least two iron-zinc alloy coatings as the upper layer is within the range of from 1 to 40 g/m.sup.2 per side of the steel sheet. The difference in the ratio of iron content to the coating weight between the uppermost coating of the at least one iron-zinc alloy coating as the lower layer and the lowermost coating of the at least two iron-zinc alloy coatings as the upper layer is within the range of from 1 to 15 wt. %. The sum of the total coating weight of the at least one iron-zinc alloy coating as the lower layer and the total coating weight of the at least two iron-zinc alloy coatings as the upper layer is within the range of from 10 to 75 wt. % per side of the steel sheet.

    Method of Fe-Zn alloy electroplating
    8.
    发明授权
    Method of Fe-Zn alloy electroplating 失效
    Fe-Zn合金电镀方法

    公开(公告)号:US4519878A

    公开(公告)日:1985-05-28

    申请号:US483564

    申请日:1983-04-11

    摘要: A strip horizontally travels within an electroplating apparatus while the plating solution is applied between the strip and anode, in which relative speed of the solution to the strip and/or current density are varied, whereby an outer plated layer on the strip is provided with Fe-Zn alloy of high Fe content while an inner plated layer on the strip is provided with Fe-Zn alloy of low Fe content.

    摘要翻译: 在电镀设备中水平行进的条带,同时将电镀溶液施加在带和阳极之间,其中溶液与带的相对速度和/或电流密度发生变化,由此带上的外镀层设置有Fe -Zn高Fe含量的合金,而带材上的内镀层提供Fe含量低的Fe-Zn合金。