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    • 3. 发明授权
    • VERFAHREN ZUR PHOSPHATIERUNG VON METALLOBERFLÄCHEN
    • 金属表面磷化方法
    • EP0866888B1
    • 1999-06-16
    • EP96938047.6
    • 1996-11-02
    • Metallgesellschaft Aktiengesellschaft
    • GEHMECKER, HorstKOLBERG, ThomasREIN, Rüdiger
    • C23C22/17C23C22/18
    • C23C22/17C23C22/182
    • The invention concerns a method of phosphating metal surfaces consisting at least partially of iron or steel using low-zinc technology, in which the metal surfaces are brought into contact with aqueous acidic phosphating solutions at between 30 and 65 DEG C for between 1 and 8 minutes. The phosphating solutions contain: between 0.4 and 2.0 g/l Zn; between 7 and 25 g/l P2O5; between 0.005 and 0.5 g/l peroxide (calculated as H2O2); and between 0.01 and 10 g/l formiate (calculated as formiate ion). The phosphating solutions are free from chlorate and added nitrite, the weight ratio of free P2O5 to total P2O5 therein is set at a value of between 0.03 and 0.20, and the amount of free acid is set at a value of between 0.5 and 2.5. Additionally, the phosphating solutions can contain up to 30 g/l nitrate and manganese, magnesium, calcium, lithium, tungstate, vanadate, molybdate or combinations thereof, optionally also nickel and/or cobalt each in amounts of up to 3 g/l, and optionally also up to 0.030 g/l copper. The weight ratios of Mn : Zn, Mg : Zn, Ca : Zn and optionally of Ni and/or Co : Zn should be at most 2 : 1 in each case. The method is suitable in particular for preparing metal surfaces for subsequent electrophoretic enamelling, in particular cathodic electrophoretic enamelling.
    • 5. 发明公开
    • Improved method of lubricating iron and steel before cold working
    • Methode zum Einschmieren von Eisen und Stahl vor der Kaltverarbeitung。
    • EP0380067A1
    • 1990-08-01
    • EP90101350.8
    • 1990-01-24
    • HENKEL CORPORATION
    • Nagae, YoshioSawasaki, YoshihikoOkumura, YasuoTanizawa, Yasuo
    • C23C22/17
    • C23C22/83C23C22/17
    • An improved lubricating layer for heavy cold working of iron and steel objects can be obtained by first phos­phating them with a solution comprising, in percentages by weight, 0.3 to 2.5 % of zinc ions, 0.01 to 2.0 % of ferrous ions, 0.5 to 5.0 % of phosphate ions, 0.7 to 12.0 % of ni­trate ions, and 0.02 to 0.25 % of water soluble aromatic organic compounds that contain both nitro and sulfonic groups, with the ferrous ion and zinc ion contents addi­tionally being such that the weight ratio of ferrous ions to zinc ions in the phosphating solution in within the range from 0.005 to 3.0. Optionally, the phosphating solu­tion may also contain from 0.2 to 2.0 % of calcium ions, and when it does, the weight ration of calcium ions to zinc ions in the solution should also be in the range from 0.7 to 4.0. After phosphating, the phosphated surfaces are treated with a conventional lubricant, preferably a weakly alkaline solution of sodium stearate.
    • 通过首先用包含重量百分比为0.3-2.5%的锌离子,0.01-2.0%的亚铁离子,0.5-5.0%的亚铁离子的溶液磷化它们,可以获得一种用于钢铁物体的重的冷加工的改进的润滑层, 的磷酸根离子,0.7〜12.0%的硝酸根离子和0.02〜0.25%的含有硝基和磺酸基的水溶性芳香族有机化合物,其中亚铁离子和锌离子含量另外使得亚铁离子与 磷酸盐溶液中的锌离子在0.005〜3.0的范围内。 任选地,磷酸盐溶液还可以含有0.2-2.0%的钙离子,而当它们时,溶液中钙离子对锌离子的重量比也应在0.7-4.0的范围内。 在磷化之后,用常规润滑剂,优选弱碱性硬脂酸钠溶液处理磷酸化表面。