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Clayton, OH, United States

Patent
Faraday Technology, Inc., Algaeventure Systems and Physical Sciences, Inc | Date: 2011-09-30

An electrolytic filtration method and apparatus for the concentration and collection of suspended particulates from aqueous solutions is disclosed. The electrolytic cell contains at least an anode and a cathode, and in one embodiment contains a plurality of anodes and cathodes. The electrolytic cell also contains a filter, and in one embodiment the filter is a moving belt filter. While not bound by theory, the electrolytic filtration method and apparatus is based on the electrophoretic movement of algae particles suspended in an aqueous solution away from the filter under the influence of an electric field. In one embodiment the electric field is a pulsed waveform with unidirectional voltage or current pulses. In another embodiment, the electric field is a pulsed waveform with bidirectional voltage or current pulses.


An electrolytic method and apparatus for the concentration and collection of suspended particulates from solutions is disclosed. In one embodiment, the solution is an aqueous solution and the suspended particles are algae particles. The electrolytic cell contains at least an anode and a cathode, and in one embodiment contains a plurality of anodes and cathodes. While not bound by theory, the electrolytic method and apparatus is based on the electrophoretic movement of algae particles suspended in an aqueous solution under the influence of an electric field. In one embodiment the electric field is a pulsed wavefrom with unidirectional voltage or current pulses. In another embodiment, the electric field is a pulsed waveform with bidirectional voltage or current pulses.


An electrochemical finishing system for super conducting radio frequency (SCRF) cavities including a low viscosity electrolyte solution that is free of hydrofluoric acid, an electrode in contact with the electrolyte solution, the SCRF cavity being spaced apart from the electrode and in contact with the electrolyte solution and a power source including a first electrical lead electrically coupled to the electrode and a second electrical lead electrically coupled to the cavity, the power source being configured to pass an electric current between the electrode and the workpiece, wherein the electric current includes anodic pulses and cathodic pulses, and wherein the cathodic pulses are interposed between at least some of the anodic pulses. The SCRF cavity may be vertically oriented during the finishing process.


Grant
Agency: Department of Defense | Branch: Air Force | Program: SBIR | Phase: Phase I | Award Amount: 150.00K | Year: 2015

ABSTRACT: There is a stated need for enhanced capabilities to strip functional coatings from, e.g., military aerospace parts, due to saturation behaviors exhibited by current stripping methods. In the proposed program, Faraday will develop low-cost, environmentally-sound drop-in/add-on unit operations based on pulsed FARADAYIC Stripping and ElectroWinning technologies, which would require only a power supply swap-out and installation of an auxiliary process tank, respectively. Faraday will establish processing conditions that allow for efficient FARADAYIC Stripping and FARADAYIC ElectroWinning recovery of dissolved metals, and evaluate the enhancement to stripping solution lifetime and processing rate afforded by this combination of technologies. We will identify suitable target operating metals concentrations to enable an appropriate balance of stripping rate/efficacy and electrowinning efficiency. We will initiate development of a transition plan for future implementation at Air Force and/or commercial partner maintenance facilities and perform an analysis of the economics, safety and material compatibility of the technology. Phase II will entail design and construction of a pilot-scale apparatus to strip coatings from specific aerospace parts of interest; evaluation of FARADAYIC Stripping performance on various substrate materials; development of alpha-scale components for prototype testing at Boeing and Air Force facilities; and completion of the technology transition plan. BENEFIT: The anticipated result of the proposed program is the demonstration, development and deployment of a low-cost, environmentally-benign augmentation of existing WC-Co HVOF stripping operations. In particular, application of pulsed FARADAYIC Stripping and Electrowinning technologies will be investigated for their capability to enhance stripping solution lifetime and enable recovery of dissolved metals. The process is scalable, will integrate directly with equipment available at USAF depots, and will result in significant cost reductions through extended lifetimes of stripping solutions and increased part stripping rates. Interest is also anticipated in the commercial aircraft market, as well as in any market segment in which wear-resistant coatings are needed, such as construction equipment, rail transportation manufacture, paper mill roll fabrication, and high-strength valve seals for undersea oil/gas extraction applications.


Patent
Faraday Technology, Inc. | Date: 2014-12-30

A method and system for electrochemically machining a hollow body of a metal or a metal alloy. An electrode is positioned within a hollow body including a metal or metal alloy, where the hollow body has a variable internal diameter. The hollow body is oriented vertically, with the electrode oriented vertically therein. The hollow body is at least partially filled with an aqueous, acidic electrolyte solution, the electrolyte solution being devoid of hydrofluoric acid and having a viscosity less than 15 cP. An electric current is passed between the hollow body and the electrode, where the electric current includes a plurality of anodic pulses and a plurality of cathodic pulses, and where the cathodic pulses are interposed between at least some of the anodic pulses.

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