5 results about "Electrochemical dissolution" patented technology

This invention provides a method for recovering nickel from high-temperature alloys. The method includes the following steps: electrochemically dissolving the high-temperature alloy to obtain a nickel-containing electrolyte and anode mud; adjusting the pH of the nickel-containing electrolyte until impurity metal ions form a precipitate, separating the precipitate to obtain a purified solution; mixing the purified solution, a chloride-containing solution, and an extractant for extraction to separate a cobalt-supported organic phase and a nickel-containing raffinate; adjusting the pH of the nickel-containing raffinate until nickel ions are converted into nickel precipitate, and then reducing the nickel precipitate with hydrogen plasma to obtain metallic nickel powder. The recovery process provided by this invention achieves high purity nickel recovery from high-temperature alloys, significantly shortens the single-batch operation cycle, improves recovery efficiency, and can meet the needs of large-scale, high-load continuous production.

This invention relates to a gap control device, method, and application for near-atomic-scale electrochemical machining of ion channel proteins, belonging to the field of electrochemical machining technology. To address the problems of insufficient gap control precision and difficulty in achieving near-atomic-scale localized dissolution and real-time observation in existing micro / nano electrochemical machining, this invention provides a dedicated device and method. The device constructs a precisely controllable nano / sub-nanometer-scale dielectric cavity layer deposited on the surface of the workpiece anode in a TEM window, and seals it with a tool cathode containing micro-perforations to form a closed cavity capable of storing liquid. The method includes: sequentially injecting a phospholipid-containing organic solvent and an electrolyte containing ion channel proteins into the cavity; utilizing the phospholipid's self-assembly at the interface to form a biomimetic confinement layer, allowing the electrolyte to contact the workpiece anode only through the internal channels of the ion channel proteins; and applying an appropriate pulse voltage to achieve localized electrochemical dissolution of the workpiece anode within an ultrathin gap defined by the dielectric layer thickness.

The application discloses a preparation method and application of an inert metal tungsten anode for low-temperature electrolytic aluminum of ionic liquid, and relates to the technical field of electrolysis. The preparation method of the porous tungsten inert anode provided by the application comprises raw material proportioning, raw material mixing, vacuum sintering and electrode purification. The method combines a discharge plasma sintering process with an electrochemical dissolution process to prepare the porous tungsten anode with a pore diameter of 1-10 microns. The anode has excellent electrochemical stability and corrosion resistance, can effectively promote the desorption of anode chlorine gas bubbles in the electrolysis process, and can effectively reduce the voltage of the low-temperature electrolytic aluminum system of ionic liquid.

This invention relates to the field of precision machining technology for metal materials, and provides a grinding method and apparatus for titanium-nickel alloys. The method includes: pre-treating a titanium-nickel alloy workpiece; placing the pre-treated titanium-nickel alloy workpiece in a rotary machining cavity, the rotary machining cavity rotating around a central axis, causing the titanium-nickel alloy workpiece to rotate and adhere to the inner wall of the cavity, forming a self-stabilized fixed state without mechanical clamping; introducing a first abrasive medium, a second abrasive medium, and a third abrasive medium into the rotary machining cavity in three stages; while the rotary machining cavity remains rotating, adding an electrolyte and applying electricity to the rotary machining cavity, causing the titanium-nickel alloy workpiece to undergo electrochemical dissolution, thereby forming an electrochemical-mechanical synergistic machining state. This solution can establish a synergistic relationship between material microstructure stability control and surface leveling efficiency, achieving highly consistent surface quality control while avoiding processing-induced phase transformation.

This invention discloses an automated and chemical polishing method based on DC power supply control, relating to the field of metal surface treatment technology. The method includes: placing the workpiece to be polished as the anode in an electrolytic cell; applying preset electrical parameters through a DC power supply to trigger an electrochemical dissolution reaction; simultaneously or alternately performing mechanical or fluid-assisted polishing to remove reaction products; real-time monitoring of process parameters such as current density, electrolyte potential, temperature, or surface roughness and feeding them back to the control system; the system dynamically adjusting the power output parameters or polishing parameters based on the monitoring data and preset endpoint conditions, until the polishing endpoint is reached, at which point it automatically terminates. This invention achieves high efficiency, stability, and automation of the polishing process through the synergistic effect of electrochemical and mechanical polishing and intelligent closed-loop control, effectively improving polishing efficiency and surface quality consistency.