摘要:
The invention relates to an at least two-stage method for corrosion protection treatment of metal surfaces, wherein, in a first step (i), an organic coating comprising an aqueous phase (A) is applied to the metal surface and, in a following step (ii), the organic coating applied to the metal surface contacted with an acidic, aqueous composition (B) comprising at least one or more water-soluble compounds containing at least one atom selected from the elements Zr, Ti, Si, Hf, V and/or Ce and one or more water-soluble compounds that release copper ions. The invention further comprises a metal component that is at least partially made of steel, iron, zinc and/or aluminum and the alloys thereof and has been treated by the method according to the invention, and to the use thereof in automobile construction and in the construction industry and for producing household appliances and electronics housings.
摘要:
The invention relates to an at least two-stage method for corrosion protection treatment of metal surfaces, wherein, in a first step (i), an organic coating comprising an aqueous phase (A) is applied to the metal surface and, in a following step (ii), the organic coating applied to the metal surface contacted with an acidic, aqueous composition (B) comprising at least one or more water-soluble compounds containing at least one atom selected from the elements Zr, Ti, Si, Hf, V and/or Ce and one or more water-soluble compounds that release copper ions. The invention further comprises a metal component that is at least partially made of steel, iron, zinc and/or aluminum and the alloys thereof and has been treated by the method according to the invention, and to the use thereof in automobile construction and in the construction industry and for producing household appliances and electronics housings.
摘要:
The present invention relates to a method for reducing the ionic strength or the concentration of certain polyvalent ions in aqueous dispersions of organic binding agents or inorganic solid bodies by electrodialysis, and a cell package suitable for use in the method. This method permits stabilization of aqueous compositions of the dispersed components by regulating the ionic strength or the concentration of certain polyvalent ions thereby increasing the durability and throughput times of coating baths. More particularly, the method is used in removing polyvalent metal cations from anionically stabilized aqueous binding agent dispersions. A special application exists in removing from autophoretic baths, which contain anionically dispersed organic binding agents and possibly inorganic pigments for forming protective layers on metallic components, polyvalent cations of zinc, iron and aluminum, which accumulate in the bath when components with surfaces comprised at least partially from zinc, iron and/or aluminum, are processed.