Abstract: A system for the galvanic deposition of aluminum incorporating a tubular cell through which goods to be treated can be moved in the axial direction. An electrolyte is pumped through the tubular cell preferably with the aid of an electrolyte circulating system which is self-contained. The electrolyte is gated out by means of T-shaped connecting components which are adjoined by airlock arrangements associated with the tubular cell.

Abstract: An improved method is disclosed for producing cathode aluminum foil for electolytic capcitors in which aluminum foil of 98.0% to 99.99% purity is etched in an electrolytic bath containing a chloride or hydrochloric acid in water solution while subjected to an AC and/or DC current, and treated following etching by immersion in an aqueous solution of nitric acid containing about 2.5 to about 3.7 weight percent nitric acid, rinsing, and immersion in an aqueous solution containing about 1.5 to about 5.0 weight percent chromic acid and about 3.0 to about 5.0 weight percent phosphoric acid, again rinsed to substantially completely remove chloride ions from the etched foil surface and increase the capacitance of the foil, and to substantially reduce the capacitance decay rate of the treated foil. The treated foil may be passivated in an aqueous solution of a carboxyl acid, preferably a 1.5 to 5.0 weight percent solution of citric acid in deionized water, before drying.

Abstract: A laser enhanced electroplating system or etching system or conventional electroplating or etching system includes a continuous electrochemical processing system with a sheet of material to be treated electrochemically passed from a supply roller to a plating bath and out over an exit roller with the plating system under automatic control. A rinse-tank is also proved in series with the plating tank. The sheet to be treated electrochemically can be coated with a protective film which prevents electrochemical action from occurring where it is present, but which sheet can be removed in a predetermined location. One removes the protective film where desired to provide a mask by means of a laser which is scanned under automatic control. Then the plating or etching operation occurs through the openings in the mask. A rinse-tank contains a solvent capable of removing the mask from the sheet subsequent to the plating or etching operation. An array of lasers can be employed.

Abstract: An installation for electro-depositing metal, such as aluminum, on elongated goods such as tapes or wires characterized by a tubular cell, which is closed to the outside and provided with airlock arrangements at each end so that goods can be conveyed therethrough in contact with an electrolyte for electroplating. The cell is formed of a plurality of interconnected rectangular tubes with each tube having a flange at each end for forming a connection and receiving interchangeable nonconductive insert pieces, which match the interior dimensions of the tube and have atleast two longitudinal channels for guiding the goods to be metallized and for positioning anodes to surround the goods to be metallized in the flow of electrolyte.

Abstract: A surface treatment apparatus for producing a steel strip having an enhanced phosphatizing property, has a plurality of guide rolls for guiding the strip along a predetermined path, a pickling vessel having nozzles for spraying a pickling liquid onto the surface of the strip, a first rinsing vessel having nozzles for spraying water onto the strip surface, an electrolytic treating vessel having an anode and a temperature control for the electrolytic treating liquid, a second rinsing vessel having nozzles for spraying water onto the strip surface, and a voltage supply for applying a voltage between an anode and a cathode consisting of a guide roll located beside and close to the electrolytic treating liquid contained in the electrolytic treating vessel.

Abstract: Novel plating baths and the processes for plating therewith are disclosed which provide corrosion-resistant nickel/zinc alloy coatings containing 13-15 weight/% of nickel for iron or steel substrates. The novel baths have combined nickel and zinc contents in the range of 14 to 24 ounces of metal per gallon with the ratio of nickel to zinc maintained in the range 0.1:0.4. These baths permit satisfactory plating of the alloy to be achieved at current densities in the range 30 to 120 amperes per square foot. At alloy coating thicknesses in the range 0.00005 to 0.0005 inches, a salt spray corrosion resistance in excess of 0.5 hours per microinch is afforded. Additionally, by coating the substrate, before alloy plating, with a substantially pure nickel priming layer, the corrosion resistance rate can be effectively doubled. Apparatus for the continuous plating of the priming layer and the corrosion-resistant alloy layer is also described.

Abstract: This invention relates to a plating means, wherein an accurate plating for a smaller work surface is carried out high-speedily. For this purpose, the smaller work surface is enclosed by a mask of the plating means, and a plating solution is jetted for the work surface from a nozzle disposed within a closed space of the mask inside. Further, the plating means according to this invention has means for suctioning and discharging speedily an extra plating solution together with atmosphere within the closed space as well as outer air induced by an outer air induction means. Further, the used plating solution is again returned to a plating solution tank by a preferred recycling system. Thus, consumption of the plating solution is saved greatly.

Abstract: An electrolysis device for electrolytic deposition of a metal on at least one surface of the tape which has been precoated with a metal provides an electrolytic metal deposition band in which there is a first electrode for connection to a first voltage source. A tape drive is provided for moving the tape through the bath including first guide rollers defining a single loop for the tape through the bath. A second electrode is provided in the tape path and mounted to contact the tape above the entrance to the bath and over an area of the one metallized surface and is connected to a second source potential. Second guide rollers along the tape path downstream of the bath, including a second guide roller contact the metallized surface and is connected to a third source potential.

Abstract: An apparatus and process are described in which a multiple continuous electrochemical procedure is carried out on a metallic strip. Included in this procedure is a gold-plating step with a specially designed gold-plating cell. Also, the gold electroplating is limited to certain areas of the metallic strip where required for a particular application. Particularly important is the design of the various electrochemical processing cells so that continuous processing may be carried out on a continuous moving metal strip. Also, compatibility with other electrochemical and chemical processes carried out on the continuous strip line, is desirable.

Abstract: A gold plating cell and process are described which are particularly useful for continuous gold plating procedures. Advantages of the use of this gold plating cell is the rapid plating possible without degradation of the quality of the plated gold. Rapid plating is desirable economically because of greater product throughput. Also, the cell and process is such as to concentrate the gold plating in areas of the strip where it is most needed. This is also economically advantageous since it reduces the amount of gold used.

Abstract: A composite material for graphical applications, in particular for nameplate production and having foil of aluminium or one of its alloys stuck on to a support foil. This aluminium foil bears on its side facing away from the supporting layer an aluminium oxide layer, which is thick by comparison with the thickness of the aluminium foil, on top of which there is a further layer of a light sensitive plastic.

Abstract: In a process for electroplating aluminum articles, the article is first electrolytically treated, as anode, in a bath consisting essentially of a solution of caustic alkali, and thereafter electroplated. The electrolytic caustic cleaning step, preferably involving agitation, is found specially suitable in composition and indeed is effective in a relatively short time to afford an essentially bare aluminum surface, i.e., free of anodic oxide film and also free of pitting or smut, for advantage in plating, as with tin or other metal. Intermediate steps can be employed such as immersion tinning or zincating and brief electroplating such as a bronze strike; the electrolytic cleaning co-acts well with the intermediate stages, indeed requiring fewer steps over all. Although applicable batchwise, the process is particularly appropriate for continuous electroplating wherein the aluminum wire or strip may pass rapidly through the electrolytic cleaning, intermediate and plating baths in succession.

Abstract: A continuous line for plating on indeterminant lengths of metallic strip material where space is limited by providing a line of modular construction and upwardly sloping through the plating operation. The modular line includes feeding of the metallic strip from an overhead coil, solution tanks disposed on an upwardly inclined path for the cleaning, etching, deoxidizing and rinsing of the strip surfaces, plating tanks for the continuous electrodeposition of metal onto both surfaces of the strip, rinsing tanks and driers and then winding the plated strip onto a second coil.

Abstract: Apparatus for electrolysis by projection for deposit of or removal of a metal material on parts which are at least partially electrically conducting, characterized by the fact that it comprises at least one jet fed by a pump and which continuously projects the electrolyte onto a defined area on the surface of the parts, these parts being placed on a support with a device insuring their electrical connection to a direct current polarity while the other polarity is connected to an electrode positioned in the hydraulic circuit upstream of the jet.

Abstract: A galvanic coating apparatus for coating of relatively long objects. The coating apparatus is provided with a trough for accommodating a bath liquid with the trough including two opposite end walls, each of which are provided with an opening for permitting the long object to pass therethrough. The trough is disposed in a larger container which is also provided with two openings for accommodating the object to be coated. The openings in the trough and the container are arranged such that they are in alignment when the trough is disposed in the container.

Abstract: An apparatus and process are described in which a multiple continuous electrochemical procedure is carried out on a metallic strip. Included in this procedure are both cleaning and electropolishing steps prior to plating on the metallic strip. Particularly important is the design of the various electrochemical processing cells so that continuous processing may be carried out on a continuous moving metal strip. Also, compatibility with other electrochemical and chemical processes carried out on the continuous strip line is desirable.

Abstract: A method of continuously electroplating alloys onto strip and wire. The strip is moved in an essentially mirror symmetrical path through the plating bath with the anode generally bisected by the mirror plane. The distance between anode and strip is smaller within the mirror plane, and larger at strip positions removed from the mirror plane, resulting in essentially uniform current density over the length of the strip immersed in the plating bath and in a homogeneous composition of the plated surface layer.

Abstract: A process for the production of electroplated aluminium stock, such as strip or wire, comprises passing the stock continuously through a bath having a high dissolving power for aluminium oxide, such as strong aqueous sulphuric acid and phosphoric acid and subsequently through an electroplating bath, the first bath having a cathode electrode and the electroplating bath having an anode electrode so that the stock is anodic in the first bath. The stock may pass through one or more intermediate non-electrolytic treatment stages, such as immersion tinning or zincating. It may also pass through one or more electrolytic pretreatment stages during its passage between the first bath and the electroplating bath. In such pretreatment stages, such as the application of a bronze strike, there may be an anode electrode at the same potential as the anode in the electroplating bath.

Abstract: The present invention relates to an apparatus to effect a selective plating automatically and continuously in order to make connecting elements such as connectors or contact elements such as relays. More particularly it relates to an apparatus to conduct a selective plating automatically and continuously at least on one of the upper and lower surfaces of a metal strip member unfolded from a roll, wherein the metal strip is moved intermittently in one direction correspondingly with the intervals at which at least one cleaning nozzle, one vacuum nozzle and one plating nozzle are linearly arranged while it is kept pressed onto the tips of the nozzles.

Abstract: A method and an apparatus for effecting in succession electrolytic processes and other processes such as water washing in connection therewith, comprising a series of treating units respectively for the electrolytic and other processes, the treating units being arranged in row in the order of the processes. Each treating unit consists of first and second unit halves one upon the other, the unit halves comprising a through passage for feeding the material and at least one insulating passage for flowing a treating liquid onto surfaces of the material, and the units for the electrolytic processes being further provided with electrodes for causing electric current to flow between the electrodes and the material.

Abstract: An apparatus for electroplating selected portions of a strip comprises means for intermittently moving the strip through successive stations. Means are provided at one of the stations for selectively electroplating selected portions of the strip and comprises upper and lower press members which are movable relatively toward and away from one another. An upper mask of resilient material is provided on the upper member and a lower mask of resilient material is provided on the lower member. The lower mask has a plurality of openings therein having the configuration of the selected portion which is to be plated. When the upper and lower members are moved toward one another, the strip is gripped. The lower member has a plurality of openings therein. The openings in the lower member have their lower ends chamfered and extend to a first chamber in the lower member.

Abstract: Apparatus for supplying current to a moving strip includes a tank having an electrolyte and grids therein. The strip passes through the tank from a roll on the inlet side of the tank. A pair of conductor rolls bear on the strip in spaced apart relationship as it passes over the inlet roll. A D. C. power source has one side connected to the grids and the other side connected through separate leads to each end of each conductor roll. A current limit device may be provided in each lead.

Abstract: Apparatus for continuously and selectively plating a stripe of metal onto a continuously moving metal strip, said apparatus comprising a hollow, rotatably mounted plating wheel having a peripheral slot extending around the circumfery thereof, said slot communicating with the interior of said wheel, and distribution means fixedly mounted within said wheel, said distribution means comprising an electrolysis chamber and a suction chamber, means for feeding an electrolyte solution to said electrolysis chamber, and means for applying negative pressure to the suction chamber, whereby when the metal strip to be plated is maintained in driving engagement with the periphery of said wheel, said strip covers said slot, said electrolysis chamber having anode means associated therewith, and said strip being connected as a cathode, whereby electrolyte passing through said electrolysis chamber is electroplated on the exposed inner surface of the strip, with excess electrolyte continuously being drawn off through said suctio

Abstract: This method of copper plating aluminum and aluminum alloy wire or strip applies an adherent and ductile plating while the wire is moving rapidly and continuously through the plating apparatus. An improved chemical zincating step followed by a copper pyrophosphate strike plating, within critical thickness limits, reduces the plating time and makes practical plating of the wire while moving at speeds of about 100 feet per minute or more in relation to the processing solution.

Abstract: Apparatus for degreasing and electroplating wire with a high current density electrolyte at high speeds includes a supply reel, guide pulleys, driving drums, degreasing and washing tanks, plating tanks and a take-up reel. The speeds of the driving drums for plating and degreasing are related and controlled in accordance with wire tension by means of a pulley, spring-based pivotable dancer arm, and a variable resistor. Fluid drag by wires running in one direction is eliminated by placement of a plurality of closely spaced anodes across the top of the plating bath and a flow stabilizer plate over the degreasing tank. A control circuit provides a desired constant ratio between drive speed and plating current.