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    • 2. 发明授权
    • Fluoride and chromium free acid etchant rinse for aluminum
    • 氟化物和无铬铬酸蚀刻剂冲洗铝
    • US4980076A
    • 1990-12-25
    • US403625
    • 1989-09-06
    • Shigeo TanakaTomoyuki AokiYasuo IinoYoji Ono
    • Shigeo TanakaTomoyuki AokiYasuo IinoYoji Ono
    • C23G1/12
    • C23G1/125
    • Problems with previously known aqueous acidic rinsing solutions for aluminum after shaping while using surface lubricants are avoided by use of a solution which contains water and (A) orthophosphoric acid in an amount to give a stoichiometric equivalent of 3.0 to 50 g/L as PO.sub.4.sup.-3, (B) an aluminum ion sequestrant component in an amount of 0.01 to 10.0 g/L; and (C) 20 to 170 ppm of ferric ion. The ferric ions act to inhibit corrosion of the stainless steel process equipment. Preferably the solution also contains 0.1 to 1.0 g/L of H.sub.2 O.sub.2, NO.sub.2.sup.-1 ions, or a mixture thereof to reoxidize ferrous ions formed by reduction of ferric ions during use of the solution and thus maintain the concentration of ferric ions above 20 ppm at all times. The solution may also contain surfactant and up to 10 g/L of dissolved aluminum ions.
    • 使用含有水的溶液和(A)正磷酸的量,通过使用表面润滑剂成型后的铝的先前已知的水性酸性漂洗溶液的问题可以避免,其量为化学计量当量为3.0〜50g / L,PO4- 3,(B)0.01〜10.0g / L的铝离子螯合剂成分; 和(C)20〜170ppm的铁离子。 铁离子用于抑制不锈钢工艺设备的腐蚀。 优选地,溶液还含有0.1至1.0g / L的H 2 O 2,NO 2 -1离子或其混合物,以在溶液的使用期间再氧化由铁离子还原形成的亚铁离子,并且因此将铁离子的浓度保持在20ppm以上 一直。 该溶液还可以含有表面活性剂和高达10g / L的溶解的铝离子。
    • 3. 发明授权
    • Method for cleaning aluminum and aluminum alloys
    • 铝和铝合金清洗方法
    • US5382295A
    • 1995-01-17
    • US64082
    • 1993-05-20
    • Tomoyuki AokiYoji Ono
    • Tomoyuki AokiYoji Ono
    • F28F13/18C23G1/22F28F19/02C11D7/06C23G1/14
    • C23G1/22
    • An aqueous alkaline cleaner for aluminum has a pH in the range from 10.0-12.0 and contains:(A) from 0.5 to 10.0 g/L of an alkali builder component;(B) from 0.5 to 10.0 g/L of aminoalkyl- and/or hydroxyalkyldi-phosphonic acids and/or their water soluble salts;(C) from 0.1 to 3.0 g/L of an aluminum ion sequestering agent component; and(D) from 0.5 to 5.0 g/L of a surfactant component.Cleaning aluminum and aluminum alloy with such a cleaner generates an excellent surface condition with respect to de-smutting performance, water wettability, avoidance of black smut production, blackening, and paint adherence at least as good as that achieved with conventional acid cleaners, without requiring any acid wash.
    • PCT No.PCT / US91 / 08250 Sec。 371日期:1993年5月20日 102(e)日期1993年5月20日PCT 1991年11月12日PCT。用于铝的碱性水性碱性清洁剂的pH为10.0-12.0,含有:(A)0.5至10.0g / L的碱助洗剂 零件; (B)0.5至10.0g / L氨基烷基 - 和/或羟烷基二膦酸和/或其水溶性盐; (C)为0.1〜3.0g / L的铝离子螯合剂成分; 和(D)0.5-5.0g / L表面活性剂组分。 使用这种清洁剂清洁铝和铝合金,在去除斑点性能,水润湿性,避免黑色黑点生成,黑化和涂料粘附性方面产生极好的表面状况,至少与常规酸性清洁剂相同,不需要 任何酸洗。