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    • 5. 发明授权
    • Low lead release plumbing components made of copper based alloys containing lead, and a method for obtaining the same
    • 含有铅的铜基合金制造的低铅释放管道部件及其制造方法
    • US06770215B2
    • 2004-08-03
    • US10195992
    • 2002-07-16
    • Aldo Giusti
    • Aldo Giusti
    • B44C122
    • C23F1/00C22C9/04
    • Lead brass components for potable water distribution circuits (e.g., plumbing components made of CuZn39Pb3, containing 3% Pb), also chronium plated ones, are subjected to a lead-selective surface etching to reduce, in operation, the release of Pb caused by Pb surface “smearing”, resulting either from machining or molding; said elements are firstly contacted by an aqueous solution of an acid capable of forming soluble Pb salts, preferably a non-oxidizing solution, by simply dipping the components in the solution, e.g., a solution of 0.1 M sulfamic acid, at 20°-50° C. for 10 to 50 minutes, and, subsequently, the elements are passivated by immersion into a strong base aqueous solution, e.g., a solution of 0.1 M NaOH at 20°-25° C., for approximately 10 minutes; in this manner, plumbing components made of a copper based alloy containing Pb are obtained, which components, after 15 days of test according to US NSF STD61 procedure, release Pb in an amount less than 0.025 &mgr;g for each ml of the internal volume of the component delimited by metallic walls remained in contact with water during the testing period.
    • 用于饮用水分配回路的铅黄铜组件(例如,含有3%Pb的CuZn39Pb3制成的管道组件)也是经过镀锡的铅进行铅选择性表面蚀刻,以在操作中减少由Pb引起的Pb的释放 表面“涂抹”,由加工或成型得到; 所述元素首先通过简单地将组分浸入溶液中,例如0.1M氨基磺酸的溶液在20°-50℃下,由能够形成可溶性Pb盐,优选非氧化性溶液的酸的水溶液接触 ℃下浸泡10至50分钟,然后将元素浸入强碱性水溶液中,例如在20°-25℃下加入0.1M NaOH溶液约10分钟; 以这种方式,获得由含有Pb的铜基合金制成的管道部件,根据美国NSF STD61程序测试15天后,该组分以每ml的内部体积的百万分之一的量释放小于0.025杯的Pb 在测试期间,由金属墙界定的部件与水保持接触。
    • 8. 发明授权
    • Low lead release plumbing components made of copper based alloys containing lead, and a method for obtaining the same
    • 含有铅的铜基合金制造的低铅释放管道部件及其制造方法
    • US06270590B1
    • 2001-08-07
    • US08875881
    • 1997-11-19
    • Aldo Giusti
    • Aldo Giusti
    • C23C806
    • E03B7/006C23F1/00Y10S148/901
    • A method for treating a component made of a copper-based alloy containing lead. The component has Pb and Pb salts on a surface thereof. The method includes the step of etching the surface of the component selectively to remove almost entirely the Pb and Pb salts from the surface. The etching includes treating the surface with an acidic aqueous solution that is a) a non-oxidizing acidic aqueous solution of an acid capable of forming soluble Pb salts or b) an oxidizing acidic aqueous solution of an organic acid mixed with peroxide. The method also includes the step of passivating the etched surface whereby to inhibit release of any Pb or Pb salts remaining in the component when the passivated surface is in contact with water.
    • 一种处理由含铅的铜基合金制成的部件的方法。 该组分在其表面上具有Pb和Pb盐。 该方法包括选择性地蚀刻该组分的表面以从表面几乎完全去除Pb和Pb盐的步骤。 蚀刻包括用酸性水溶液处理表面,酸性水溶液是a)能够形成可溶性Pb盐的酸的非氧化性酸性水溶液,或b)与过氧化物混合的有机酸的氧化性酸性水溶液。 该方法还包括钝化蚀刻表面的步骤,从而当钝化表面与水接触时,抑制残留在组分中的任何Pb或Pb盐的释放。