US3085949A - Surface treatment of titanium or titanium base alloy - Google Patents

Surface treatment of titanium or titanium base alloy Download PDF

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Publication number
US3085949A
US3085949A US18884A US1888460A US3085949A US 3085949 A US3085949 A US 3085949A US 18884 A US18884 A US 18884A US 1888460 A US1888460 A US 1888460A US 3085949 A US3085949 A US 3085949A
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US
United States
Prior art keywords
titanium
base alloy
surface treatment
articles
hydrogen
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US18884A
Inventor
Leech Harry Rowland
Riding Frank
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Imperial Chemical Industries Ltd
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Imperial Chemical Industries Ltd
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Publication date
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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.

Description

United States Patent 3,085,949 SURFACE TREATMENT OF TITANIUM 0R TITANIUM BASE ALLDY Harry Rowland Leech and Frank Riding, Widues, England, assignors to Imperial Chemical Industries Limited, London, England, a corporation of Great Britain No Drawing. Filed Mar. 31, 19%, Ser. No. 18,884 Claims priority, applicatien Great Britain Apr. 17, 1959 5 Claims. (Cl. Zed-29) The present invention relates to improvements in or relating to the surface treatment of titanium or titanium base alloy articles for the purpose of preparing a suitably conditioned surface. thereon prior to, for example, electroplating.
In British patent specification No. 758,013 there is detscribed and claimed inter alia a method of surface treatment of titanium or titanium base alloy articles which comprises treatment of the surface of the said articles with concentrated hydrochloric acid solution at elevated temperatures followed by electrodeposition of a coating of metal thereon.
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.
It has now been found that by treating the surfaces of titanium or titanium base alloy articles with hydrogen at elevated temperatures surfaces are formed which have a substantially similar etched appearance to that produced according to the method described and claimed in British patent specification No. 758,013, that is to say surfaces which are porous, grey and matt in appearance. It has also been found that the surfaces thus formed likewise permit deposition thereon of a satisfactorily adherent coating of metal.
According to the present invention 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.
It is sometimes desirable to pretreat the articles with a pickling or de-scaling bath before treating them with hydrogen.
By way of example, by passing hydrogen over 16 pieces of titanium 1 /2 in. X in. X 16 S.W.G. (0.064 in.) at a temperature between 600 and 1000 C. for various periods of time a series of 16 surface treated titanium specimens "ice is prepared containing hydrogen over a range of 995 mg. and it is found that a satisfactory adherent electrodeposit of platinum can be. formed on each piece thus treated. 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. A complete disclosure of suitable plating procedures and baths may be found in Metal Industry, vol. (November 19', 1954), pages 427-429.
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.
What we claim is:
l. 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.
2. A method as claimed in claim 1 wherein the elevated temperature is between 600 and 1000 C.
3. A method as claimed in claim 1 wherein the article is pretreated with a pickling bath before treating it with hydrogen.
4. 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.
5. A method as claimed in claim 1 wherein the article is pretreated with a de-scaling bath before treating it with hydrogen.
References Cited in the file of this patent UNITED STATES PATENTS 2,714,566 Barton et a1. Aug. 2, 1955 2,719,797 Rosenblatt Oct. 4, 1955 2,772,227 Quaely et al Nov. 27, 1956 2,835,630 Huddle et al May 20, 1958 2,841,477 Hall July 1, 1958 2,885,826 Grieve et a1 May 12, 1959 2,929,766 Withers et al. Mar. 22, 1960 FOREIGN PATENTS 758,013 Great Britain Sept. 26, 1956 OTHER REFERENCES Abkowitz et al.: Titanium in Industry, Van Nostrand Co., New York, 1955, pages 3133.

Claims (1)

1. 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.
US18884A 1959-04-17 1960-03-31 Surface treatment of titanium or titanium base alloy Expired - Lifetime US3085949A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB13185/59A GB871941A (en) 1959-04-17 1959-04-17 Improvements in or relating to the surface treatment of titanium or titanium base alloy

Publications (1)

Publication Number Publication Date
US3085949A true US3085949A (en) 1963-04-16

Family

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US18884A Expired - Lifetime US3085949A (en) 1959-04-17 1960-03-31 Surface treatment of titanium or titanium base alloy

Country Status (5)

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US (1) US3085949A (en)
CH (1) CH390655A (en)
DE (1) DE1196470B (en)
ES (1) ES257297A1 (en)
GB (1) GB871941A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8204477A (en) * 1982-11-18 1984-06-18 Bekaert Sa Nv CATALYST AND METHOD FOR MANUFACTURING THIS CATALYST AND ITS USE.

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2714566A (en) * 1952-05-28 1955-08-02 Rca Corp Method of treating a germanium junction rectifier
US2719797A (en) * 1950-05-23 1955-10-04 Baker & Co Inc Platinizing tantalum
GB758013A (en) * 1953-10-03 1956-09-26 Ici Ltd Improvements in or relating to the surface treatment of titanium or titanium base alloys
US2772227A (en) * 1953-06-29 1956-11-27 Westinghouse Electric Corp Protection of molybdenum and tungsten at high temperatures
US2835630A (en) * 1952-05-06 1958-05-20 Huddle Roy Alfred Ulfketel Treatment of metals prior to electro-plating
US2841477A (en) * 1957-03-04 1958-07-01 Pacific Semiconductors Inc Photochemically activated gaseous etching method
US2885826A (en) * 1954-12-21 1959-05-12 British Thomson Houston Co Ltd Glass-to-metal seals
US2929766A (en) * 1958-06-13 1960-03-22 Melpar Inc Plating of iridium

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2790738A (en) * 1955-04-14 1957-04-30 Du Pont Titanium descaling bath and process

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2719797A (en) * 1950-05-23 1955-10-04 Baker & Co Inc Platinizing tantalum
US2835630A (en) * 1952-05-06 1958-05-20 Huddle Roy Alfred Ulfketel Treatment of metals prior to electro-plating
US2714566A (en) * 1952-05-28 1955-08-02 Rca Corp Method of treating a germanium junction rectifier
US2772227A (en) * 1953-06-29 1956-11-27 Westinghouse Electric Corp Protection of molybdenum and tungsten at high temperatures
GB758013A (en) * 1953-10-03 1956-09-26 Ici Ltd Improvements in or relating to the surface treatment of titanium or titanium base alloys
US2885826A (en) * 1954-12-21 1959-05-12 British Thomson Houston Co Ltd Glass-to-metal seals
US2841477A (en) * 1957-03-04 1958-07-01 Pacific Semiconductors Inc Photochemically activated gaseous etching method
US2929766A (en) * 1958-06-13 1960-03-22 Melpar Inc Plating of iridium

Also Published As

Publication number Publication date
CH390655A (en) 1965-04-15
ES257297A1 (en) 1960-07-01
DE1196470B (en) 1965-07-08
GB871941A (en) 1961-07-05

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