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    • 4. 发明申请
    • PRETREATING ZINC SURFACES PRIOR TO A PASSIVATING PROCESS
    • 预处理过程中的ZINC表面
    • US20140360630A1
    • 2014-12-11
    • US14466377
    • 2014-08-22
    • HENKEL AG & CO. KGaA
    • Andreas ARNOLDMichael WOLPERSMarcel ROTHUta SUNDERMEIER
    • C23C8/02C23C8/40
    • C23C8/02C23C8/40C23C22/00C23C22/182C23C22/34C23C22/60C23C22/73C23C22/78C23C22/83C23C2222/00
    • The invention relates to a wet-chemical pretreatment of zinc surfaces prior to applying a corrosion-protection coating, which deposits a thin inorganic coating of oxide and/or metallic iron. An iron layer structure which is applied according to the invention, hereinafter referred to as ferrization, improves the achievable corrosion protection of wet-chemical conversion coatings on zinc surfaces. Furthermore, the ferrization process causes both a reduction of the contact corrosion of joined metal components which have zinc and iron surfaces as well as a reduction of corrosive coating migration on cut edges of galvanized steel strips with coating layer structures. In particular, the invention relates to an alkaline composition containing an iron ion source, a reducing agent based on oxoacids of nitrogen and phosphorus, and water-soluble organic carboxylic acids with an amino group at the α, β, or γ position with respect to the acid group and/or the water-soluble salts thereof.
    • 本发明涉及在施加防腐涂层之前锌表面的湿化学预处理,其沉积氧化物和/或金属铁的薄无机涂层。 根据本发明应用的铁层结构(以下称为铁质化)改善了锌表面上湿化学转化涂层的可实现的腐蚀保护。 此外,铁化过程同时导致具有锌和铁表面的接合金属部件的接触腐蚀的降低以及在具有涂层结构的镀锌钢带的切割边缘上的腐蚀性涂层迁移减少。 特别地,本发明涉及含有铁离子源,基于氮和磷的含氮的还原剂和在α,bgr或γ位置具有氨基的水溶性有机羧酸的碱性组合物,相对于 酸组和/或其水溶性盐。
    • 7. 发明授权
    • Process for the treatment of ferrous metal parts to improve their
corrosion resistance and friction properties simultaneously
    • 用于处理黑色金属部件的工艺,以同时提高其耐腐蚀性和摩擦性能
    • US5346560A
    • 1994-09-13
    • US896928
    • 1992-06-11
    • Sylvie MournetJoseph Wawra
    • Sylvie MournetJoseph Wawra
    • C23C8/58C23C8/80C23C8/40
    • C23C8/80
    • Precision ferrous metal parts subject to severe friction and corrosion in e are nitrided, preferably in a bath of molten salts based on CNO.sup.- cyanate ions, oxidized, preferably in baths of molten oxidizing alkaline salts, and then impregnated with a hydrophobic wax. A layer after the nitriding and oxidation steps is formed of a close-packed deep sub-layer and a porous superficial sub-layer ranging in thickness between 5 and 25 .mu.m, and exhibiting through pores ranging between 0.2 and 3 .mu.m in diameter. The impregnation wax is an organic compound with a high molecular weight between 500 and 10,000, with a surface tension in the liquid state ranging between 10 and 73 mN/m, the contact angle between the solid phase of the superficial layer and the wax in the liquid state ranging between 0 and 75.degree. C.
    • 在使用中受到严重摩擦和腐蚀的精密黑色金属部件被氮化,优选在基于CNO-氰酸根离子的熔盐浴中被氧化,优选在熔融的氧化性碱性盐的浴中,然后用疏水性蜡浸渍。 氮化和氧化步骤之后的层由紧密堆积的深子层和厚度​​在5至25μm之间的多孔表层子层形成,并且通过直径为0.2至3μm的孔。 浸渍蜡是具有500至10,000之间高分子量的有机化合物,液态的表面张力范围为10至73mN / m,表面层固相与蜡之间的接触角为 液态在0和75℃之间