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    • 4. 发明授权
    • Method of increasing corrosion resistance of metals and alloys by treatment with rare earth elements
    • 通过稀土元素处理提高金属和合金的耐腐蚀性的方法
    • US06406562B1
    • 2002-06-18
    • US09572699
    • 2000-05-16
    • Yucheng LuMichael Brian Ives
    • Yucheng LuMichael Brian Ives
    • C23C2282
    • C23C22/56C23C22/48C23C22/50C23C22/52C23C22/68
    • There is provided a method for treating the surface of metals such as nickel based or high alloy steels, austenitic and ferritic stainless steels, copper and aluminum alloys to increase their corrosion resistance by modification of the metal surfaces to inhibit cathodic corrosion processes. In a single step treatment process the metals are immersed into a heated aqueous composition containing a rare earth salt substantially free of any halide compound. Increased corrosion resistance is obtained using nitrates of yttrium, gadolinium, cerium, europium, terbium, samarium, neodymium, praseodymium, lanthanum, holmium, ytterbium, dysprosium, and erbium nitrates. The rare earth salt is present in the range from about 2% by weight to saturation of the solution. The composition includes a pH-modifying substance such as nitric acid to adjust the pH in the range 0.5 to about 6.5 to attack the surface to remove oxides facilitating deposition of the rare earth.
    • 提供了一种用于处理镍基或高合金钢,奥氏体和铁素体不锈钢,铜和铝合金等金属表面的方法,通过改变金属表面以抑制阴极腐蚀过程来提高其耐腐蚀性。 在单步处理工艺中,将金属浸入含有基本上不含任何卤化物的稀土盐的加热含水组合物中。 使用钇,钆,铈,铕,铽,钐,钕,镨,镧,钬,镱,镝和硝酸铒的硝酸盐可以获得提高的耐腐蚀性。 稀土盐以约2重量%至溶液饱和的范围存在。 组合物包括pH调节物质如硝酸,以将pH调节在0.5至约6.5的范围内以侵蚀表面以除去促进稀土沉积的氧化物。
    • 5. 发明授权
    • Lubrication treatment method for cold working of steel
    • 钢的冷加工润滑处理方法
    • US06231687B1
    • 2001-05-15
    • US09413931
    • 1999-10-07
    • Naoyuki KobayashiMasahiko Kawakami
    • Naoyuki KobayashiMasahiko Kawakami
    • C23C2282
    • B21J3/00C23C22/12C23C22/22C23C22/367C23C22/83
    • A phosphating solution that contains from 3 to 30 g/l of zinc ions, from 0.1 to 20 g/l of ferrous ions, from 5 to 60 g/l of phosphate ions, from 5 to 60 g/l of nitrate ions, and a source of hydroxylamine in a concentration corresponding stoichiometrically to from 0.5 to 4 g/l of hydroxylamine and in which there is a weight ratio of zinc to phosphate that is from 0.1:1 to 1:1 deposits on steel to be cold worked a phosphate conversion coating suitable as a lubricant carrier. This phosphating solution, which may optionally contain one or more of calcium, nickel, cobalt, and copper cations and simple and complex fluorine-containing anions, makes it possible to lower the temperature of the treatment solution, reduce the amount of sludge, improve the quality of the coating film, and allow single-liquid type replenishment to be used. Preferably the surface to be phosphated is immersed in the phosphating solution, maintained at a temperature of 35 to 80° C., for 2 to 20 minutes.
    • 含有3〜30g / l的锌离子,0.1〜20g / l的亚铁离子,5〜60g / l的磷酸盐离子,5〜60g / l的硝酸根离子的磷化液,以及 羟胺浓度相当于0.5至4g / l羟胺的化学计量浓度,其中锌与磷酸盐的重量比为0.1:1至1: 转化涂层适合作为润滑剂载体。 该磷酸盐溶液可以任选地含有一种或多种钙,镍,钴和铜阳离子和简单和复杂的含氟阴离子,使得可以降低处理溶液的温度,减少污泥的量,改善 涂膜的质量,并允许使用单液体补充。 优选将要磷化的表面浸入磷酸盐溶液中,保持在35至80℃的温度下2至20分钟。