UMICORE GALVANOTECHNIK GMBH Patent applications |
Patent application number | Title | Published |
20140131209 | ELECTROLYTE AND ITS USE FOR THE DEPOSITION OF BLACK RUTHENIUM COATINGS AND COATINGS OBTAINED IN THIS WAY - The invention relates to a ruthenium electrolyte which is suitable for the deposition of decorative and industrial layers having a particular blackness. The invention further relates to the use of the electrolyte of the invention in a process for the deposition of decorative and industrial layers of ruthenium having a particular blackness (“black ruthenium) on jewelry, decorative goods, consumer goods and industrial articles. The invention therefore likewise relates to corresponding layers and the articles coated in this way. The electrolyte is characterized in that it operates in the weakly acidic to alkaline pH range. | 05-15-2014 |
20130264215 | DIRECT-CONTACT MEMBRANE ANODE FOR USE IN ELECTROLYSIS CELLS - The present invention relates to an anode system for conventional electrolysis cells, a process for the production thereof and its use for the deposition of electrolytic coatings. The anode system is characterized in that the anode ( | 10-10-2013 |
20130140185 | ELECTROLYTE AND PROCESS FOR THE DEPOSITION OF COPPER-TIN ALLOY LAYERS - The present invention relates to an electrolyte and a process for depositing bronze alloys on consumer goods and industrial articles. The electrolyte of the invention comprises, in addition to the metals to be deposited and additives such as wetting agents, complexing agents and brighteners, in particular sulfur compounds which have a positive effect in the corresponding process for the deposition of the bronzes. | 06-06-2013 |
20120217166 | PROCESS FOR THE ELECTROLYTIC COPPER PLATING OF ZINC DIECASTING HAVING A REDUCED TENDENCY TO BLISTER FORMATION - In the electroplating of zinc diecastings with a copper layer, the electrolyte penetrates into the pores of the zinc diecasting. When the temperature is increased later, this leads to vaporization of the electrolyte liquid in the pores and to blistering or flaking of the copper layer. It is proposed that plating be carried out in two steps. In the first step, only a thin copper layer of less than 1 μm is applied and the plated parts are then treated at a temperature which leads to vaporization of the electrolyte liquid. The thin copper layer is still sufficiently porous for the vapour to be able to escape. Only the solid constituents of the electrolyte remain. The copper layer is then thickened to a final thickness of from about 20 to 30 μm. In this plating step, electrolyte liquid no longer penetrates into the pores of the zinc diecasting. The parts which are coated in this way display no blistering or flaking of the copper layer after storage at a temperature of 150° C. | 08-30-2012 |
20110308959 | PROCESS FOR THE DEPOSITION OF PLATINUM-RHODIUM LAYERS HAVING IMPROVED WHITENESS - The present invention relates to an electrochemical process for the deposition of coatings comprising an alloy of platinum and rhodium on, in particular, decorative articles. The process of the invention is characterized in that defined conditions are employed under which the electrolytically deposited layer has, contrary to expectations, a high whiteness which comes extraordinarily close to the appearance of silver. | 12-22-2011 |
20110174631 | COPPER-TIN ELECTROLYTE AND PROCESS FOR THE DEPOSITION OF BRONZE LAYERS - Consumer goods and industrial articles are electroplated with bronze layers for decorative purposes and for protection against corrosion. The electrolytes used hitherto for producing decorative bronze layers are cyanide-containing or, as in the case of baths based on organosulfonic acids, highly corrosive, or, as in the case of cyanide-free baths based on diphosphoric acid, give unsatisfactory brightness and shine. The present invention provides a nontoxic electrolyte for the electrochemical deposition of uniformly bright and shiny bronze layers and a corresponding process for the application of such decorative bronze layers to consumer goods and industrial articles, by means of which relatively thick bronze layers can also be deposited electrochemically in a satisfactory way. | 07-21-2011 |
20110089043 | MODIFIED COPPER-TIN ELECTROLYTE AND PROCESS FOR THE DEPOSITION OF BRONZE LAYERS - The invention relates to a modified copper-tin electrolyte which is free of toxic constituents such as cyanides or thio compounds. The invention further relates to a process for the deposition of decorative bronze layers on consumer goods and industrial articles using the electrolyte of the invention. The electrolyte comprises an additive formed from epichlorohydrin and hexamethylenetetramine and contains carbonate or hydrogencarbonate ions. | 04-21-2011 |