利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

2 条记录 (耗时 0.026 秒)

    Precoated steel sheet having improved corrosion resistance and formability
    1.
    发明授权
    Precoated steel sheet having improved corrosion resistance and formability 失效
    具有改善的耐腐蚀性和成形性的预涂钢板

    公开(公告)号：US5141822A

    公开(公告)日：1992-08-25

    申请号：US620449

    申请日：1990-12-03

    申请人： Sachio Matsuo ,  Toshiaki Shiota ,  Maki Itoh ,  Hideo Kawaguchi ,  Hiroki Hanabata ,  Yukihiro Yoshikawa ,  Takao Taka ,  Kiyoyuki Fukui

    发明人： Sachio Matsuo ,  Toshiaki Shiota ,  Maki Itoh ,  Hideo Kawaguchi ,  Hiroki Hanabata ,  Yukihiro Yoshikawa ,  Takao Taka ,  Kiyoyuki Fukui

    IPC分类号： B05D7/14 ,  B05D7/24 ,  B32B15/08 ,  B32B15/092 ,  C23C22/30 ,  C23C28/00

    CPC分类号： C23C28/00 ,  C23C22/30 ,  Y10T428/12549 ,  Y10T428/12569 ,  Y10T428/12799

    摘要： A precoated steel sheet having improved corrosion resistance and formability is disclosed, which comprises a Zn- or Zn alloy-plated steel sheet having on the plated surface either a colloidal silica-containing chromate undercoat layer and a polyhydroxypolyether resin-based topcoat of 0.3 to 10 .mu.m in thickness in which resin is derived by polycondensation of a dihydric phenol component selected from a mononuclear dihydric phenol, dinuclear dihydric phenol, and a mixture of both, with an epihalohydrin or a non-colloidal material-containing chromate underlayer and an epoxy resin based topcoat containing colloidal silica of a thickness of from 0.3-1.6 .mu.m in thickness. In spite of the absence of zinc powder, the precoated steel sheet can be satisfactorily welded by resistance welding when the thickness of the topcoat layer is not greater than 2.5 .mu.m, and even with such a thin topcoat, the precoated steel sheet retains its improved corrosion resistance and formability. The precoated steel sheet can be satisfactorily finish-coated by electrodeposition. The undercoat layer is produced by a two stage reduction of Cr.sup.+6 to Cr.sup.+3 in an aqueous suspension containing chromic acid.

    摘要翻译： 公开了一种具有改进的耐腐蚀性和可成形性的预涂钢板，其包括在镀覆表面上具有含胶体二氧化硅的铬酸盐底涂层和聚羟基聚醚树脂基面涂层为0.3至10的镀Zn钢或Zn合金 通过将选自单核二元酚，双核二元酚和二者的混合物的二元酚成分与表卤代醇或非胶体材料的铬酸盐底层和环氧树脂缩聚得到树脂的厚度μm 含有厚度为0.3-1.6μm厚度的胶体二氧化硅的基面涂层。 尽管不存在锌粉，但是当顶涂层的厚度不大于2.5μm时，预涂钢板可以通过电阻焊接令人满意地焊接，并且即使使用这种薄的顶涂层，预涂钢板保持其改进 耐腐蚀性和成型性。 预涂钢板可以通过电沉积令人满意地完成涂层。 底涂层是通过在含有铬酸的含水悬浮液中将Cr +6还原为Cr + 3来进行的。