摘要:
The invention relates to a method for producing structured chromium layers, in particular for media contact surfaces, wherein the structural chromium layer is produced by electrodepositing chromium from an electrolyte onto a substrate. The invention is based on the aim of creating a method for producing structured chromium layers for contact surfaces having improved characteristics compared to the known chromium coatings. Said aim is achieved in that the structural chromium layer is formed at constant current densities and in a temperature range that depends on the current density and in that the structure formation is initiated by at least one temperature change.
摘要:
A razor cartridge includes razor blade assemblies having an inter-blade guard attached to a side of a razor blade. The razor blade is formed from strip that is manufactured including a thermal oxidation process to form a chromium oxide layer on the side surface of the razor blade. This oxide film prevents electrochemical corrosion of the razor blade that may be visible to a user and prevents real or perceived premature failure of the razor blade and thus the razor cartridge during its extended life. The razor blade assembly may also have an array of closely spaced droplets of a liquid adapted to inhibit corrosion of the razor blade applied to the side of the razor blade visible to a user.
摘要:
Die vorliegende Erfindung betrifft ein Verfahren zur Abscheidung einer funktionellen Chromschicht aus einem chromhaltigen Elektrolyten auf einem Substrat sowie eine Elektrolytzusammensetzung. Die erfindungsgemäße Elektrolytzusammensetzung weist Sulfoessigsäure auf. Das erfindungsgemäße Verfahren läßt sich bei Stromdichten zwischen ungefähr 20 bis ungefähr 150 A/dm 2 betreiben mit eine Stromausbeute größer 30% auf, wobei Schichten mit einer Härte größer 800 HV 0,1 und einer Korrosionsbeständigkeit größer 200 Stunden abgeschieden werden.
摘要:
A method for the production of a structured hard chrome layer is disclosed, whereby chrome is deposited on a workpiece from an electrolyte comprising: (a) Cr(VI) compounds in an amount corresponding to 50 g/l to 600 g/l of chromic acid anhydride, (b) 0,5 g/l to 10 g/l of sulphuric acid, (c) 1 g/l to 20 g/l of aliphatic sulphonic acids with 1 to 6 carbon atoms and (d) 10 g/l to 200 g/l of at least one compound forming a dense cathode film, selected from ammonium, alkali and earth alkali molybdates, ammonium, alkali and earth alkali vanadates and ammonium, alkali and earth alkali zirconates. The invention further relates to a structured hard chrome layer, obtained by said method and an electrolyte for carrying out the method.
摘要:
A method for the production of a structured hard chrome layer is disclosed, whereby chrome is deposited on a workpiece from an electrolyte comprising: (a) Cr(VI) compounds in an amount corresponding to 50 g/l to 600 g/l of chromic acid anhydride, (b) 0,5 g/l to 10 g/l of sulphuric acid, (c) 1 g/l to 20 g/l of aliphatic sulphonic acids with 1 to 6 carbon atoms and (d) 10 g/l to 200 g/l of at least one compound forming a dense cathode film, selected from ammonium, alkali and earth alkali molybdates, ammonium, alkali and earth alkali vanadates and ammonium, alkali and earth alkali zirconates. The invention further relates to a structured hard chrome layer, obtained by said method and an electrolyte for carrying out the method.
摘要:
The use of alkali metal, alkaline earth metal, ammonium and substituted ammonium salts of alkyl and alkanol sulfonic acids as additives in various types of electroplating baths (e.g., sulfate, sulfonic acid, fluoroborate, and halide baths) has a number of unexpected benefits including wider useful current density range, improved appearance and in the case of tin improved oxidative stability.
摘要:
The cell for continuous electrolytic deposition treatment of bars (7) or the like according to the invention comprises a closed vessel (5) containing at least one tubular anode (6) through which a bar (7) for electrolytic processing can be conveyed in the axial direction, the bar (7) being inserted into the vessel (5) and leaving the vessel (5) through respective inlet and outlet mouthpieces (3) equipped with sealing means, means being present for supplying a flow of electrolytic bath to the anode or anodes (6) and transferring the bath from the anode (6) to the vessel (5), producing a flow of the bath inside the anode (6) and parallel to the bar (7) to be processed, dielectric spacing means also being present between the bar (7) inlet mouthpiece (3) and the end of the adjacent anode (6) and adapted to define a zone of controlled chemical attack before electroplating begins.
摘要:
Tin-free steel sheets exhibiting improved retorting resistance with respect to paint adhesion are produced by chromium plating a steel sheet through cathodic electrolysis in a chromium ion-containing solution, reversely electrolyzing the sheet by a successive anodizing treatment in said solution, and subjecting the sheet to an electrolytic treatment in an aqueous chromate solution. The SO 4 -- concentration of the chromate solution used in the electrolytic chromate treatment should be limited to the range of 0.01 to 0.10 gram per liter of the solution.
摘要:
Electrodeposition of a layer of chromium of selectively constituted crystalline character and grain texture on metal substrates, such as aluminum or steel base lithographic sheet provides improved and directly chromium plated aluminum or steel base lithographic sheet capable of operatively functioning as a surface plate after exposure of an applied photo sensitive coating thereon. Such chromium layer is disposed in adherent interfacial engagement with the surface of a metal substrate and is compositively constituted of coalescively agglomerated assemblages of subagglomerated spheroidate particles of generally lobular curvilinear contour characterized by an effective absence of generally planar exterior surfaces and relatively sharp protuberant angles.