RUST PREVENTIVE CARBON STEEL SHEET FOR FUEL TANK HAVING GOOD WELDING GASTIGHTNESS AND ANTICORROSION AFTER FORMING
    1.
    发明公开
    RUST PREVENTIVE CARBON STEEL SHEET FOR FUEL TANK HAVING GOOD WELDING GASTIGHTNESS AND ANTICORROSION AFTER FORMING 失效
    ROSTPREVENTIVES碳钢板燃油箱,具有良好的焊割气泄漏耐腐蚀性好之后,形成

    公开(公告)号:EP0870847A4

    公开(公告)日:2003-10-15

    申请号:EP97928533

    申请日:1997-07-01

    申请人: NIPPON STEEL CORP

    摘要: Provided is a hot-dip aluminum-coated carbon steel sheet for fuel tanks, which has a good welding gastightness and anticorrosion after forming. The hot-dip aluminum-coated carbon steel sheet comprises a carbon steel sheet, which contains C (0.003 % or less), Si (0.03 % or less), Mn (0.3 % or less), P (0.02 % or less), N (0.006 % or less), Ti (0.1 % or less), Nb plus Ti, which amount to at least an atomic equivalent of (C + N) and at most 0.2 % of (C + N), and B (1 to 30 ppm), and the remainder of Fe and an unavoidable impurities, and a coated layer, which contains Si (2 to 13 %) and the remainder of Al and an unavoidable impurities, and the steel sheet has a total elongation of at least 45 % after coating. Alternatively, the steel sheet may have a chromate film of 5 to 100 mg/m on surfaces thereof and may have a resin coat on an uppermost surface thereof. Accordingly, the aluminum-coated carbon steel sheet has a good elongation after aluminum-coating, so that it is considerably excellent in anticorrosion after forming as compared with a conventional one. Therefore, the steel sheet is optimum for automobile fuel tanks, due to an excellent welding gastightness in addition.

    摘要翻译: 本发明提供的热浸镀Al钢板具有优异的气密性后焊接性和耐腐蚀性的后续形成油箱。 本发明提供了,如混凝土装置,热浸镀Al钢板,其包括的钢板含有C:最多达0.003%,至多0.03%的Si,至多含有Mn:0.3%,不大于0.02%的P ,N最高为0.006%,最多的Ti,Ti和Nb的0.1%,至少的(C + N)的原子当量的总量和高达0.2%,1〜30重量ppm的B,和余量的 的Fe和不可避免的杂质,以及电镀层由含有Si:2〜13%,以及余量的Al和钢板的表面上的不可避免的杂质,所述钢板表示电镀后的至少45%的总延伸率。 可替换地,热浸镀Al钢板可具有在铬酸盐涂层在5至100毫克/米<2>的表面上的量,因此,它可以具有与顶表面上的树脂涂层。 其结果是,所述镀Al钢板镀Al后具有优异的伸长率。 的镀Al钢板,因此,在耐腐蚀之后与常规钢板相比燃料箱的内部环境形成显着优异。 因此,镀铝钢板因此具有优异的气密性焊接后是最适合作为汽车的燃料箱的材料。