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    • 3. 发明申请
    • SURFACE TREATMENT METHOD AND COMPOSITION FOR ZINC COATED STEEL SHEET
    • 表面处理方法和组合镀锌钢板
    • WO1991011542A2
    • 1991-08-08
    • PCT/US1991000531
    • 1991-01-25
    • HENKEL CORPORATIONISHII, HitoshiMORI, KazuhikoMIYAWAKI, ToshiSHIMA, Shizuo
    • HENKEL CORPORATION
    • C23C22/60
    • C23C22/78C23C22/60
    • 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 and Co 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.
    • 实现镍和/或钴沉积工艺,其可以在几乎中性的pH下运行,并且能够快速沉积足够大量的镍和/或钴,以提高涂料粘附性和后涂层耐腐蚀性并且具有良好的溶液稳定性。 通过用pH在5和10之间的水溶液处理含锌涂层钢板,包括(A)总计至少0.01g / L的选自由Ni 2+和Co 2+组成的组中的金属离子, 2+离子和(B)足够量使得部分(A)中所列的金属离子与选自氨和中性区具有至少一个氨基的有机化合物的络合剂完全复合。 作为除了金属离子和配位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。