Surface treatment method and composition for zinc coated steel sheet
    1.
    发明授权
    Surface treatment method and composition for zinc coated steel sheet 失效
    镀锌钢板的表面处理方法和组成

    公开(公告)号:US5318640A

    公开(公告)日:1994-06-07

    申请号:US916096

    申请日:1992-07-28

    IPC分类号: C23C22/60 C23C22/78 C23C18/46

    CPC分类号: C23C22/60 C23C22/78

    摘要: A nickel and/or cobalt deposition process which can be run at a nearly neutral pH and which rapidly deposits nickel and/or cobalt in quantities large enough to improve the paint adhesion and post coating corrosion resistance, and which has a good solution stability, is achieved by treating zinc coated sheet steel with an aqueous solution that has a pH between 5 and 10 inclusive and comprises (A) a total of at least 0.01 g/L of metal ions selected from the group consisting of Ni.sup.2+ and Co.sup.2+ ions and (B) a sufficient amount to fully complex the metal ions recited in part (A) of complexing agents selected from the group consisting of ammonia and organic compounds having at least one amino group in the neutral region.The substitution precipitation reaction of nickel and cobalt is substantially accelerated by the presence, as a third component in addition to the metal ion and complexing agent, of at least one ionic species or compound selected from the nitrite ion, nitrate ion, thiocyanate ion, thiosulfate ion, thiourea, phosphite ion, hypophosphite ion, and perchlorate ion.

    摘要翻译: PCT No.PCT / US91 / 00531 Sec。 371日期:1992年7月28日 102(e)日期1992年7月28日PCT 1991年1月25日PCT PCT。 出版物WO91 / 11542 日期:1991年8月8日。镍和/或钴沉积方法,其可以在接近中性的pH下运行,并且以足够大的量快速沉积镍和/或钴以改善涂料粘附性和后涂层耐腐蚀性,以及哪些 具有良好的溶液稳定性,通过用pH为5〜10的水溶液处理镀锌钢板而实现,其包含(A)总计至少0.01g / L的金属离子,所述金属离子选自 Ni2 +和Co2 +离子和(B)足够的量使得在中性区域中具有至少一个氨基的氨和有机化合物中选择的一组络合剂部分(A)中所述的金属离子完全复合。 作为除了金属离子和络合剂之外的至少一种离子种类或选自亚硝酸根离子,硝酸根离子,硫氰酸根离子,硫代硫酸盐的化合物的第三成分,镍和钴的取代沉淀反应基本上加快 离子,硫脲,亚磷酸根离子,次磷酸根离子和高氯酸根离子。