Electrowinning apparatus
1
A vibratory vessel for use in conjunction with a vibratory tumbling machine utilizing a bumishing or cleansing media, for bur- nishing or cleansing metal, plastic, and ce- ramic elements. Electrowinning Apparatus U.S. Patent 5486,272. Jan. 23, 1996 J.D.C. Hemsley et ab, assignors 10 Enthone-OM/ Inc., West Haven, Conn. A method of removing metal from a feedstock solution containing dissolved metal ions, which comprises passing the feedstock through an annular gap formed by an inner cathode tube and an outer anode tube at a turbulent flow rate, the inner surface of the gap being cathodic to the metal ions in the solution and formed of a metal that is smooth and is not attacked by the solution, the outer surface of the gap being smooth and anodic to the metal ions in the solution, inducting the solution flow into the annular gap by means of a pump coupled directly to the gap, the end of the inner cathode tube being closed by a non- conductive domed plug, which faces the incoming flow of solution and distributes it evenly to the annular gap and depositing the metal ions in the feedstock solution on the cathodic surface. Method for Anodizing Aluminum U.S. Patent 5,486,283. Jan. 23, í996 J.G. Mnich, assignor to Rohr Inc., Chula Vista, Calif. A chromium-free method of anodizing an unroughened aluminum alloy workpiece to produce an oxide surface receptive to the formation of strong and durable bonds with epoxy adhesives and coatings resistant to corrosion comprising providing a first aqueous anodizing solution consisting es- sentially by weight of lO--20% phosphoric acid; maintaining at a temperature from 75-90°F; immersing the workpiece in the first anodizing solution; applying a direct electric current at 5-15 V such that the current density is substantially uniform and does not exceed 10 amperes per square foot, to produce a thin, porous, highly ad- herent oxide at least 5,000 angstroms thick, providing a second aqueous anodizing so- lution consisting essentially by weight of 3-5% sulfuric acid and 0.5-1.5% boric acid; maintaining at a temperature from about 75-85°F; applying a direct electric current at 15 V such that the current density is substantially uniform and does not ex- ceed 10 amperes per square foot, to pro- duce a further growth of a less porous oxide with the final oxide coating having a weight of 250-650 milligrams per square foot and a thickness of 15,OOtS31,000 ang- stroms, which final oxide coating does not substantially reduce the fatigue resistance of the workpiece. Multilayer Coating U.S. fafent5,486,384. Jan. 23, 1996 U. Basfian and M. Sfein, assingors to Herberfs GmbH, Wuppertal, Germany A process for producing a multilayer lacquer coating on a surface provided with a dry basecoat, the process comprising eliminating substantially al1 light having a wavelength below 550 nm; selecting a polymermizing coating agent from a group consisting of radical-curable lacquer and cationic-curable lacquer; applying a layer of the coating agent on the basecoat; and exposing to high-energy radiation to poly- merize the coating agent and cure the coat- ing agent layer on the basecoat. ANALYZE!! AH Plating Solutions AUTOMATICALLY IN 2 MINUTES using a BREAKTHROUGH TECHNOLOGY! SANDA CORP. 800-999-2993 E-MAIL [email protected] Circle 061 on reader information card Attention Hard Chrome Platers! 1 Mist eliminators to comply with new EPA regulations. ) Complete exhaust systems that meet OSHA requirements fol hex chrome in the workplace D Evaporative mist eliminators satisfy stack emissions limits while evaporating rinse water 1 Authorized method 306A stack sampler why pay more to have expensive labs sample your emissions ) Wastewater treatment systems reduce your effluent discharges 1 nmkey plating systems custom fabrication 1 30 years of electroplating engineering experience BBI ELTek of Rochester,Inc Specializing in Plating Process Equipment 1600 Clinton Avenue ?? Rochester, NY 14621 7161342.5131 ??FAX 7161342-4033 8001859-3578 t Circle 023 on reader information card METAL FINISHING ?? OCTOBER 1996 85
Transcript of Electrowinning apparatus
A vibratory vessel for use in conjunction with a vibratory tumbling machine utilizing a bumishing or cleansing media, for bur- nishing or cleansing metal, plastic, and ce- ramic elements.
Electrowinning Apparatus U.S. Patent 5486,272. Jan. 23, 1996 J.D.C. Hemsley et ab, assignors 10 Enthone-OM/ Inc., West Haven, Conn.
A method of removing metal from a feedstock solution containing dissolved metal ions, which comprises passing the feedstock through an annular gap formed by an inner cathode tube and an outer anode tube at a turbulent flow rate, the inner surface of the gap being cathodic to the metal ions in the solution and formed of a metal that is smooth and is not attacked by the solution, the outer surface of the gap being smooth and anodic to the metal ions in the solution, inducting the solution flow into the annular gap by means of a pump coupled directly to the gap, the end of the inner cathode tube being closed by a non- conductive domed plug, which faces the incoming flow of solution and distributes it evenly to the annular gap and depositing
the metal ions in the feedstock solution on the cathodic surface.
Method for Anodizing Aluminum U.S. Patent 5,486,283. Jan. 23, í996 J.G. Mnich, assignor to Rohr Inc., Chula Vista, Calif.
A chromium-free method of anodizing an unroughened aluminum alloy workpiece to produce an oxide surface receptive to the formation of strong and durable bonds with epoxy adhesives and coatings resistant to corrosion comprising providing a first aqueous anodizing solution consisting es- sentially by weight of lO--20% phosphoric acid; maintaining at a temperature from 75-90°F; immersing the workpiece in the first anodizing solution; applying a direct electric current at 5-15 V such that the current density is substantially uniform and does not exceed 10 amperes per square foot, to produce a thin, porous, highly ad- herent oxide at least 5,000 angstroms thick, providing a second aqueous anodizing so- lution consisting essentially by weight of 3-5% sulfuric acid and 0.5-1.5% boric acid; maintaining at a temperature from about 75-85°F; applying a direct electric
current at 15 V such that the current density is substantially uniform and does not ex- ceed 10 amperes per square foot, to pro- duce a further growth of a less porous oxide with the final oxide coating having a weight of 250-650 milligrams per square foot and a thickness of 15,OOtS31,000 ang- stroms, which final oxide coating does not substantially reduce the fatigue resistance of the workpiece.
Multilayer Coating U.S. fafent5,486,384. Jan. 23, 1996 U. Basfian and M. Sfein, assingors to Herberfs GmbH, Wuppertal, Germany
A process for producing a multilayer lacquer coating on a surface provided with a dry basecoat, the process comprising eliminating substantially al1 light having a wavelength below 550 nm; selecting a polymermizing coating agent from a group consisting of radical-curable lacquer and cationic-curable lacquer; applying a layer of the coating agent on the basecoat; and exposing to high-energy radiation to poly- merize the coating agent and cure the coat- ing agent layer on the basecoat.
ANALYZE!!
AH Plating
Solutions
AUTOMATICALLY IN 2 MINUTES
using a
BREAKTHROUGH TECHNOLOGY!
SANDA CORP. 800-999-2993
E-MAIL [email protected]
Circle 061 on reader information card
Attention Hard Chrome Platers! 1 Mist eliminators to comply with new EPA regulations.
) Complete exhaust systems that meet OSHA requirements fol hex chrome in the workplace
D Evaporative mist eliminators satisfy stack emissions limits while evaporating rinse water
1 Authorized method 306A stack sampler why pay more to have expensive labs sample your emissions
) Wastewater treatment systems reduce your effluent discharges
1 nmkey plating systems custom fabrication
1 30 years of electroplating engineering experience
BBI
ELTek of Rochester, Inc Specializing in Plating Process Equipment
1600 Clinton Avenue ??Rochester, NY 14621 7161342.5131 ??FAX 7161342-4033
8001859-3578 t
Circle 023 on reader information card
METAL FINISHING ?? OCTOBER 1996 85
