Classifications

• • C—CHEMISTRY; METALLURGY
  • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
  • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
  • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
  • C25D5/34—Pretreatment of metallic surfaces to be electroplated
  • C25D5/38—Pretreatment of metallic surfaces to be electroplated of refractory metals or nickel
• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
  • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
  • C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents

Definitions

• Said temperature may be 90-100 C. and the article may be pretreated with a standard pickling and de-scaling bath before treatment with the hydrochloric acid.
• the method of surface treatment of titanium or titanium base alloy articles comprises treatment of the surface of the said articles with hydrogen at elevated temperatures, preferably at a temperature between 600 and 1000 0., followed by deposition of a coating of a metal thereon, for example platinum, rhodium or iridium or an alloy of two or more of these metals.
• a metal for example platinum, rhodium or iridium or an alloy of two or more of these metals.
• a suitable plating procedure comprises plating at a current density of about 0.8 amp./ sq. dm. from an aqueous solution of sodium hexahydroxy platinate containing 0.5 to 1% sodium hydroxide.
• the process of the present invention permits surfaces of titanium or titanium base alloy articles to be conditioned quickly, without loss of titanium, and uniformly even in the presence of stresses and welds.
• a method of surface treatment of an article selected from the group consisting of titanium and titanium base alloy articles which comprises treating the surface of the said articles with hydrogen at elevated temperatures and then depositing a coating of a metal thereon.
• a method as claimed in claim 1 wherein the aforesaid metal is a metal selected from the group consisting of platinum, rhodium and iridium and alloys of at least two of these metals.

Landscapes

• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Materials Engineering (AREA)
• Metallurgy (AREA)
• Organic Chemistry (AREA)
• Mechanical Engineering (AREA)
• Electrochemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
• Electroplating And Plating Baths Therefor (AREA)
• Electroplating Methods And Accessories (AREA)
• Chemically Coating (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=10018389

Family Applications (1)

Country Status (5)

Families Citing this family (1)

Citations (8)

Family Cites Families (1)

• 1959
  • 1959-04-17 GB GB13185/59A patent/GB871941A/en not_active Expired
• 1960
  • 1960-03-31 US US18884A patent/US3085949A/en not_active Expired - Lifetime
  • 1960-04-06 DE DEJ17931A patent/DE1196470B/de active Pending
  • 1960-04-11 ES ES0257297A patent/ES257297A1/es not_active Expired
  • 1960-04-14 CH CH422260A patent/CH390655A/de unknown

Patent Citations (8)

Also Published As

Similar Documents