Classifications

• • C—CHEMISTRY; METALLURGY
  • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
  • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
  • C25D3/00—Electroplating: Baths therefor
  • C25D3/02—Electroplating: Baths therefor from solutions
  • C25D3/46—Electroplating: Baths therefor from solutions of silver
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S29/00—Metal working
  • Y10S29/012—Method or apparatus with electroplating

Definitions

• Electrolyte-E a Electrolyte li are obtained at current densitieszof 1'8.-,-27la./ gogas im cy m 2g a i w oassumnl re. s. z' from a solution the essential feature of...which 1s Potassiumlselldite; :7 I M the addition of selemum (as seleniteytoa 'cy: Current density "amp/it 20-1130 Room temperature: Moderate agitation. Anodes-silver. two to four times area of cathode, or more.
• Electrolyte A appears to yield a deposit of slightly superior quality to Electrolyte B: on the other hand Electrolyte B has a rather wider range of current density.
• the ratio between the areas of the anode and cathode of a bath using an electrolyte according to the invention should be greater than that normally accepted, as otherwise anode dissolution might be impaired at the high current densities employed.
• Sodium salts or other alkali metal salts may be used wholly or partly in place of potassium from which we are able to produce excellent salts on an equivalent basis.
• bright deposits of silver at current densities some Substantial increase of speed of deposition can four to six times greater than could be used with be obtained with a stationary cathode and withaconventional plating solution. out any form of agitation of the solution, an The formulae for our preferred solutions were node having an area about twice that of the evolved after a number of experiments aimed at cathode, and a current density of th order of determining the most useful concentration of the 10 amp/ftF, but the full advantage of the intwo addition agents.
• An argentocyanide electrolyte'foruse in electrodepositing bright silver plate'athigh current densities of at least 10 amp/ft. of cathode area that consists essentially of an aqueous solution of the following substances in substantially the proportions indicated:
• An argentocyanide electrolyte for use in electrodepositing bright silverplate at high current densities of at least 10 amp/ft. of cathode area that consists essentially of anaqueous solution of the following substances in substantially the proportions indicated:
• a process for electrodepositing a bright'silver plate upon an article that comprises making the article the cathode during electrolysis at a current density of at least 10 amp/ft. of cathode area, of an electrolyte that consists essentially of an aqueou solution of the following substances in substantially the indicated proportions.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• Materials Engineering (AREA)
• Metallurgy (AREA)
• Organic Chemistry (AREA)
• Electroplating And Plating Baths Therefor (AREA)

Applications Claiming Priority (1)

Publications (1)

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ID=10911654

Family Applications (1)

Country Status (2)

Cited By (6)

Citations (2)

• 0
  • FR FR954614D patent/FR954614A/fr not_active Expired
• 1947
  • 1947-06-19 US US755738A patent/US2613179A/en not_active Expired - Lifetime

Patent Citations (2)

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