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GB1074203A - Polishing the surface of tungsten bodies - Google Patents

Polishing the surface of tungsten bodies

Info

Publication number
GB1074203A
GB1074203A GB2432364A GB2432364A GB1074203A GB 1074203 A GB1074203 A GB 1074203A GB 2432364 A GB2432364 A GB 2432364A GB 2432364 A GB2432364 A GB 2432364A GB 1074203 A GB1074203 A GB 1074203A
Authority
GB
United Kingdom
Prior art keywords
oxidizing
component
alkaline component
tungsten
bodies
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
Application number
GB2432364A
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.)
Egyesuelt Izzolampa es Villamossagi Rt
Original Assignee
Egyesuelt Izzolampa es Villamossagi Rt
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Egyesuelt Izzolampa es Villamossagi Rt filed Critical Egyesuelt Izzolampa es Villamossagi Rt
Publication of GB1074203A publication Critical patent/GB1074203A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
    • H01K3/02—Manufacture of incandescent bodies
    • 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
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F3/00—Brightening metals by chemical means
    • C23F3/04—Heavy metals

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • ing And Chemical Polishing (AREA)

Abstract

The surfaces of tungsten bodies are polished by putting the degreased bodies into an aqueous solution containing at least one oxidizing and at least one alkaline component in such a molar ratio that the oxide layer formed by the oxidizing component and part of the alkaline component is dissolved by the rest of the alkaline component. For example, tungsten spirals for valves are placed into an aqueous solution containing NaOH or KOH and K3Fe (CN)6. The molar ratio may be kept constant by continuously measuring electrochemically the concentration of the polishing solution and supplementing consumed alkaline component and anodically oxidizing reduced oxidizing component.
GB2432364A 1963-06-24 1964-06-11 Polishing the surface of tungsten bodies Expired GB1074203A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HU102363 1963-06-24

Publications (1)

Publication Number Publication Date
GB1074203A true GB1074203A (en) 1967-06-28

Family

ID=10952502

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2432364A Expired GB1074203A (en) 1963-06-24 1964-06-11 Polishing the surface of tungsten bodies

Country Status (1)

Country Link
GB (1) GB1074203A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4113177A1 (en) * 1991-04-23 1992-10-29 Nwm De Kruithoorn Bv METHOD FOR PRODUCING A PENETRATOR
EP2711970A3 (en) * 2012-09-21 2014-08-06 Stanley Electric Co., Ltd. Light source device, method for manufacturing the same and filament
US9252006B2 (en) 2011-10-27 2016-02-02 Stanley Electric Co., Ltd. Incandescent bulb, filament, and method for manufacturing filament

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4113177A1 (en) * 1991-04-23 1992-10-29 Nwm De Kruithoorn Bv METHOD FOR PRODUCING A PENETRATOR
US9252006B2 (en) 2011-10-27 2016-02-02 Stanley Electric Co., Ltd. Incandescent bulb, filament, and method for manufacturing filament
EP2711970A3 (en) * 2012-09-21 2014-08-06 Stanley Electric Co., Ltd. Light source device, method for manufacturing the same and filament
US9252007B2 (en) 2012-09-21 2016-02-02 Stanley Electric Co., Ltd. Light source device, method for manufacturing the same and filament

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