US1008762A - Metal-working. - Google Patents

Metal-working. Download PDF

Info

Publication number
US1008762A
US1008762A US55115610A US1910551156A US1008762A US 1008762 A US1008762 A US 1008762A US 55115610 A US55115610 A US 55115610A US 1910551156 A US1910551156 A US 1910551156A US 1008762 A US1008762 A US 1008762A
Authority
US
United States
Prior art keywords
metal
fused
tungsten
nitrite
wire
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
US55115610A
Inventor
Willis R Whitney
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Priority to US55115610A priority Critical patent/US1008762A/en
Application granted granted Critical
Publication of US1008762A publication Critical patent/US1008762A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • C23F1/00—Etching metallic material by chemical means
    • C23F1/44—Compositions for etching metallic material from a metallic material substrate of different composition

Definitions

  • chromium group such as tungsten or molybdenum, are pointed expeditiously, leaving a clean surface free from pits or scars.
  • a rod consisting of a metal 'of the chromium group, as for example, tungsten
  • the rod is dipped into a 1 fused bath consisting of an oxidizing'salt
  • a fused nitrite such as potassium or sodium nitrite
  • the nitrite need not be pure. I find the commercial salt which ordinarily contains small amounts of impurities, such as chlorids, answers very well for the'purpose. In some cases it is advantageous to heat the ends of the rod or filament before dipping into the fused bath, but it is usually sufficient to simply dip the rod or wire m-to the fused bath. In fact, the heat generated by the chemical action of the nitrite on the wire heats the wire to redness. If it is desired to clean a steel die plugged with tungsten,
  • the die is simply dipped into the fused nitrite and the tungsten is thereby dissolved out without any appreciable corrosion of the steel taking place.
  • Other oxidizing baths for example, the nitrate of sodium, or of potassium, can be used, but, in this case, a diluent, such as the chlorid of sodium 2.
  • a diluent such as the chlorid of sodium 2.
  • the rocess of pointing a tungsten rod or wire w ich consists in dipping an end of said rod or wire into a fused nitrite.
  • the steip which consists in pointing the tungsten ro or wire, by dipping it into fused potassium nitrite.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Description

- invention is of general application to the- STATESFPA-TENTOFFIGE' WILLIS R. WHITNEY, OF SCHENECTADY, NEW YORK, ASSIGNOB [0 GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.
Patented Nov. 14, 1911.
METAL-WORKING.
1 008,762 Specification of Letters I Patent.
Ho Drawing.
Application filed March 28, 1910. Serial No. 551,156.
chromium group, such as tungsten or molybdenum, are pointed expeditiously, leaving a clean surface free from pits or scars. My
chemical removal, or corrosion, of these metalsand can be used for other purposes,
as for example, to clean dies accidentally plugged.
If it is desired to point a rod consisting of a metal 'of the chromium group, as for example, tungsten, the rod is dipped into a 1 fused bath consisting of an oxidizing'salt,
preferably a bath consisting 3 of a fused nitrite, such as potassium or sodium nitrite; The nitrite need not be pure. I find the commercial salt which ordinarily contains small amounts of impurities, such as chlorids, answers very well for the'purpose. In some cases it is advantageous to heat the ends of the rod or filament before dipping into the fused bath, but it is usually sufficient to simply dip the rod or wire m-to the fused bath. In fact, the heat generated by the chemical action of the nitrite on the wire heats the wire to redness. If it is desired to clean a steel die plugged with tungsten,
, for example, the die is simply dipped into the fused nitrite and the tungsten is thereby dissolved out without any appreciable corrosion of the steel taking place. Other oxidizing baths, for example, the nitrate of sodium, or of potassium, can be used, but, in this case, a diluent, such as the chlorid of sodium 2. The process of chemicall removing all a or a part of a body of metal 0 the chromium roup, which consists in bringing the metal into contact with a fused bath containing a nitrite. V
3. The rocess of pointing a tungsten rod or wire w ich consists in dipping an end of said rod or wire into a fused nitrite.
' 4. The process of dissolving, or corroding, a solid body of tungsten which consists in bringing it into contact with a fused nitrite.
5. In the process of drawing tungsten, the steip which consists in pointing the tungsten ro or wire, by dipping it into fused potassium nitrite.
6. The process of dissolving, or corroding, a body of tungsten which consists in bringing it into contact with a commercial salt of nitrous acid maintained at an elevated temperature.
7. The process of corroding a body of metal of the chromium group which consists in acting'upon it with a fused oxidizing
US55115610A 1910-03-23 1910-03-23 Metal-working. Expired - Lifetime US1008762A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US55115610A US1008762A (en) 1910-03-23 1910-03-23 Metal-working.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US55115610A US1008762A (en) 1910-03-23 1910-03-23 Metal-working.

Publications (1)

Publication Number Publication Date
US1008762A true US1008762A (en) 1911-11-14

Family

ID=3077073

Family Applications (1)

Application Number Title Priority Date Filing Date
US55115610A Expired - Lifetime US1008762A (en) 1910-03-23 1910-03-23 Metal-working.

Country Status (1)

Country Link
US (1) US1008762A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2792627A (en) * 1954-03-09 1957-05-21 Rca Corp Metal-working
US3039910A (en) * 1958-11-10 1962-06-19 Aluminum Co Of America Treating aluminum surfaces
US20060283598A1 (en) * 2005-06-20 2006-12-21 Kasevich Raymond S Method and apparatus for in-situ radiofrequency assisted gravity drainage of oil (RAGD)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2792627A (en) * 1954-03-09 1957-05-21 Rca Corp Metal-working
US3039910A (en) * 1958-11-10 1962-06-19 Aluminum Co Of America Treating aluminum surfaces
US20060283598A1 (en) * 2005-06-20 2006-12-21 Kasevich Raymond S Method and apparatus for in-situ radiofrequency assisted gravity drainage of oil (RAGD)

Similar Documents

Publication Publication Date Title
US2318559A (en) Material for and process of pickling copper or its alloys
US3948703A (en) Method of chemically polishing copper and copper alloy
US2395694A (en) Processes for removing oxide from the surface of metals
US2377876A (en) Metal cleaning process and composition
US2959555A (en) Copper and iron containing scale removal from ferrous metal
US2380284A (en) Method of cleaning ferrous metal articles
US2350491A (en) Metal drawing process
US3121026A (en) Descaling metals and alloys with aqueous potassium hydroxide at relatively low temperature
CA1040987A (en) Process for stripping nickel from articles and composition utilized therein
US1008762A (en) Metal-working.
US2211400A (en) Pickling solution for copper-base alloys
US2474526A (en) Picking of stainless steels
US2538702A (en) Metal surface cleaning
US3261712A (en) Process for diffusion coating metals
US2382865A (en) Bright dip
US2479979A (en) Processes for treating ferrous metals before drawing through dies
JPS63169391A (en) Metal member for semiconductor producing device
US2353026A (en) Metal-cleaning process and composition
US2313753A (en) Method of treating magnesium and its alloys
US2871140A (en) Metal treating process
US2935428A (en) Method and composition for subjecting metals to reducing conditions
US1371445A (en) Lead-coating process
US669698A (en) Process of drawing metallic tubes.
US1211218A (en) Process for plating metals.
US1805052A (en) Process for preventing the dissolution of metals in pickling baths