Corrosion resistant steel sheets improved in corrosion resistance and
other characteristics
    1.
    发明授权
    Corrosion resistant steel sheets improved in corrosion resistance and other characteristics 失效
    耐腐蚀钢板提高了耐腐蚀性等特点

    公开(公告)号:US5510196A

    公开(公告)日:1996-04-23

    申请号:US204298

    申请日:1994-03-08

    IPC分类号: C25D3/56 B32B15/18

    摘要: Zn--Cr alloy plated steel sheets have excellent corrosion resistance. It has now been found that the phase structures of Zn--Cr alloy platings are such that they comprise yet to be known phases .eta.x, .delta.x and .GAMMA.x. Furthermore, these phases when taken either singly or with two or more phases being mixed together, exhibit the following characteristics (1)-(6). The characteristics of the respective phases are also identified below.______________________________________(1) .eta.x Resistance to cosmetic corrosion(2) .GAMMA.x Formability(3) .eta.x + .delta.x Chipping resistance(4) .eta.x + .GAMMA.x Corrosion resistance in the as-formed state(5) .delta.x + .GAMMA.x Water resistant secondary adherence of coating(6) .eta.x + .delta.x + .GAMMA.x Perforation corrosion resistance.eta.x: Hexagonal crystal a = 2.66-2.74 .ANG. c = 4.61-4.95 .ANG..delta.x: Hexagonal crystal a = 2.72-2.78 .ANG. c = 4.43-4.60 .ANG..GAMMA.x: Cubic crystal a = 3.00-3.06 .ANG.______________________________________

    摘要翻译: PCT No.PCT / JP93 / 00956 Sec。 371日期:1994年3月8日 102(e)1994年3月8日PCT 1993年7月9日PCT公布。 第WO94 / 01602号公报 1994年1月20日.Zn-Cr合金镀层钢板具有优异的耐腐蚀性。 现在已经发现,Zn-Cr合金电镀的相结构使得它们还包括尚未知的相,ηx和GAMMA x。 此外,当单独或两相或更多相混合时,这些相具有以下特征(1) - (6)。 各个阶段的特征也在下面确定。 - (1)eta x耐化妆品腐蚀 - (2)GAMMA x成型性 - (3)eta x +δx抗剪切性 - (4)eta x + GAMMA x形成状态下的耐腐蚀性 - (5) δx + GAMMA x涂层的防水二次附着力(6)eta x + delta x + GAMMA x穿孔耐腐蚀性等级x:六方晶体a = 2.66-2.74 ANGSTROM - c = 4.61-4.95 ANGSTROM - δx :六角晶体 - a = 2.72-2.78 ANGSTROM - c = 4.43-4.60 ANGSTROM - GAMMA x:立方晶体a = 3.00-3.06 ANGSTROM -