EP0145576A3 - Additive for maintaining the working order of molten-salt baths for the treatment of metal pieces - Google Patents

Additive for maintaining the working order of molten-salt baths for the treatment of metal pieces Download PDF

Info

Publication number
EP0145576A3
EP0145576A3 EP84402401A EP84402401A EP0145576A3 EP 0145576 A3 EP0145576 A3 EP 0145576A3 EP 84402401 A EP84402401 A EP 84402401A EP 84402401 A EP84402401 A EP 84402401A EP 0145576 A3 EP0145576 A3 EP 0145576A3
Authority
EP
European Patent Office
Prior art keywords
molten
additive
maintaining
treatment
metal pieces
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.)
Granted
Application number
EP84402401A
Other languages
French (fr)
Other versions
EP0145576A2 (en
EP0145576B1 (en
Inventor
Bernard Grellet
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.)
CENTRE STEPHANOIS DE RECHERCHES MECANIQUES HYDROMECANIQUE ET FROTTEMENT DITE Ste
Original Assignee
CENTRE STEPHANOIS DE RECHERCHES MECANIQUES HYDROMECANIQUE ET FROTTEMENT DITE Ste
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 CENTRE STEPHANOIS DE RECHERCHES MECANIQUES HYDROMECANIQUE ET FROTTEMENT DITE Ste filed Critical CENTRE STEPHANOIS DE RECHERCHES MECANIQUES HYDROMECANIQUE ET FROTTEMENT DITE Ste
Publication of EP0145576A2 publication Critical patent/EP0145576A2/en
Publication of EP0145576A3 publication Critical patent/EP0145576A3/en
Application granted granted Critical
Publication of EP0145576B1 publication Critical patent/EP0145576B1/en
Expired legal-status Critical Current

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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
    • 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
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/40—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Cosmetics (AREA)
  • Glanulating (AREA)
  • Detergent Compositions (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Seasonings (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Manufacture And Refinement Of Metals (AREA)
EP19840402401 1983-12-09 1984-11-26 Additive for maintaining the working order of molten-salt baths for the treatment of metal pieces Expired EP0145576B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8319781 1983-12-09
FR8319781A FR2556367B1 (en) 1983-12-09 1983-12-09 INPUT LOAD FOR THE MAINTENANCE OF MOLTEN SALT BATHTUBS FOR THE TREATMENT OF METAL PARTS

Publications (3)

Publication Number Publication Date
EP0145576A2 EP0145576A2 (en) 1985-06-19
EP0145576A3 true EP0145576A3 (en) 1985-07-10
EP0145576B1 EP0145576B1 (en) 1987-08-05

Family

ID=9295052

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840402401 Expired EP0145576B1 (en) 1983-12-09 1984-11-26 Additive for maintaining the working order of molten-salt baths for the treatment of metal pieces

Country Status (7)

Country Link
EP (1) EP0145576B1 (en)
JP (1) JPS60141864A (en)
BR (1) BR8406275A (en)
DE (1) DE3465207D1 (en)
ES (1) ES8702499A1 (en)
FR (1) FR2556367B1 (en)
IN (1) IN161219B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4030279C1 (en) * 1990-09-25 1992-06-04 Goetz Dipl.-Chem. Dr. 5400 Koblenz De Baum Regenerating molten alkali metal cyanate - by continuous addn. of urea] or polymer or condensate that generates urea, feeding additive into containers in continuous conveyor

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1012625B (en) * 1955-06-10 1957-07-25 Houghton Chemie G M B H Process for obtaining temporary carburizing effect in the heat treatment of steel in cyanide-free molten salts
FR2214760A2 (en) * 1973-01-23 1974-08-19 Ctre Rech Meca Hydromeca Surface treating ferrous metals - with molten salt bath contg carbonate, cyanate, lithium, potassium, and sodium ions
DE2429679A1 (en) * 1973-06-20 1975-01-09 Stephanois Rech Mec METHOD OF REGENERATING A BATH FROM MOLTEN SALT
DE2409285A1 (en) * 1974-02-27 1975-09-04 Degussa Regenerating nitriding and carbonising fused salt baths - contg. excess carbonate by adding polymeric carboxylic acid amides
FR2271307A1 (en) * 1974-05-17 1975-12-12 Stephanois Rech Meca Hyd Centr Stabilising fused cyanate heat treatment baths - by introducing sulphur and carbonyl cpds. to reduce cyanide formation
DE2521550A1 (en) * 1975-05-15 1976-12-02 Daimler Benz Ag Regeneration of molten metal salt nitration baths - by addition of isocyanic acid polymer
DE2542519A1 (en) * 1975-09-24 1977-04-14 Daimler Benz Ag Regenerating cyanate contg. melt baths - by adding polycarbonyl carbodiimide, esp. for nitriding iron

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5931861A (en) * 1982-08-16 1984-02-21 Mitsui Toatsu Chem Inc Regenerating agent for salt bath for nitriding metallic material

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1012625B (en) * 1955-06-10 1957-07-25 Houghton Chemie G M B H Process for obtaining temporary carburizing effect in the heat treatment of steel in cyanide-free molten salts
FR2214760A2 (en) * 1973-01-23 1974-08-19 Ctre Rech Meca Hydromeca Surface treating ferrous metals - with molten salt bath contg carbonate, cyanate, lithium, potassium, and sodium ions
DE2429679A1 (en) * 1973-06-20 1975-01-09 Stephanois Rech Mec METHOD OF REGENERATING A BATH FROM MOLTEN SALT
DE2409285A1 (en) * 1974-02-27 1975-09-04 Degussa Regenerating nitriding and carbonising fused salt baths - contg. excess carbonate by adding polymeric carboxylic acid amides
FR2271307A1 (en) * 1974-05-17 1975-12-12 Stephanois Rech Meca Hyd Centr Stabilising fused cyanate heat treatment baths - by introducing sulphur and carbonyl cpds. to reduce cyanide formation
DE2521550A1 (en) * 1975-05-15 1976-12-02 Daimler Benz Ag Regeneration of molten metal salt nitration baths - by addition of isocyanic acid polymer
DE2542519A1 (en) * 1975-09-24 1977-04-14 Daimler Benz Ag Regenerating cyanate contg. melt baths - by adding polycarbonyl carbodiimide, esp. for nitriding iron

Also Published As

Publication number Publication date
JPS60141864A (en) 1985-07-26
EP0145576A2 (en) 1985-06-19
DE3465207D1 (en) 1987-09-10
IN161219B (en) 1987-10-17
ES538372A0 (en) 1987-01-01
BR8406275A (en) 1985-10-01
EP0145576B1 (en) 1987-08-05
FR2556367A1 (en) 1985-06-14
JPS6354067B2 (en) 1988-10-26
ES8702499A1 (en) 1987-01-01
FR2556367B1 (en) 1986-09-19

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