FR2207201A1 - Metal surface treatment - using high and low concn baths and water transfer from first to second bath by evapn - Google Patents

Metal surface treatment - using high and low concn baths and water transfer from first to second bath by evapn

Info

Publication number
FR2207201A1
FR2207201A1 FR7322673A FR7322673A FR2207201A1 FR 2207201 A1 FR2207201 A1 FR 2207201A1 FR 7322673 A FR7322673 A FR 7322673A FR 7322673 A FR7322673 A FR 7322673A FR 2207201 A1 FR2207201 A1 FR 2207201A1
Authority
FR
France
Prior art keywords
stage
water
bath
concn
evapn
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
FR7322673A
Other languages
French (fr)
Other versions
FR2207201B1 (en
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.)
PARKER STE CONTINENTALE FR
Original Assignee
PARKER STE CONTINENTALE FR
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 PARKER STE CONTINENTALE FR filed Critical PARKER STE CONTINENTALE FR
Publication of FR2207201A1 publication Critical patent/FR2207201A1/en
Application granted granted Critical
Publication of FR2207201B1 publication Critical patent/FR2207201B1/fr
Granted 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
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts

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)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

Water vapour from a treatment bath is pref. used in a subsequent rinsing step, esp. the last. Alternatively, water from a treatment stage may be used in a countercurrent treatment of the same workpieces. The water used in a rinsing stage other than the first may be re-used in the previous rinsing stage. Water contg. a low concn. of electrolyte is fed to a stage where the electrolyte concn. is higher so as to contact the workpieces leaving that stage before mixing with the treatment bath. Any overall water loss in the process is made up by adding low concn. electrolyte soln. to the last rinsing stage. Heating or cooling is applied as necessary to produce the required transfer of water vapour.
FR7322673A 1972-11-21 1973-06-21 Metal surface treatment - using high and low concn baths and water transfer from first to second bath by evapn Granted FR2207201A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722256965 DE2256965A1 (en) 1972-11-21 1972-11-21 PROCESS FOR MULTI-STAGE SURFACE TREATMENT OF METALS

Publications (2)

Publication Number Publication Date
FR2207201A1 true FR2207201A1 (en) 1974-06-14
FR2207201B1 FR2207201B1 (en) 1976-04-30

Family

ID=5862301

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7322673A Granted FR2207201A1 (en) 1972-11-21 1973-06-21 Metal surface treatment - using high and low concn baths and water transfer from first to second bath by evapn

Country Status (9)

Country Link
AT (1) AT324800B (en)
BE (1) BE803965A (en)
BR (1) BR7309114D0 (en)
CH (1) CH594061A5 (en)
DE (1) DE2256965A1 (en)
ES (1) ES419374A1 (en)
FR (1) FR2207201A1 (en)
IT (1) IT1001914B (en)
NL (1) NL7313918A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0507006A1 (en) * 1991-04-02 1992-10-07 Unitika Ltd. Method of treating salt bath liquid

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52110283A (en) * 1976-02-26 1977-09-16 Nippon Paint Co Ltd Separator for oil in defatting liquid
JPS5358437A (en) * 1976-11-09 1978-05-26 Nippon Packaging Kk Oillwater separator for degresed solution
JPS5767133A (en) * 1980-10-09 1982-04-23 Nippon Steel Corp Continuous annealing installation having adjusting device for strip surface
DE4309096A1 (en) * 1993-03-15 1994-09-22 Wack O K Chemie Gmbh Process for recovery of a liquid dissolved in a wash bath

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0507006A1 (en) * 1991-04-02 1992-10-07 Unitika Ltd. Method of treating salt bath liquid
US5496449A (en) * 1991-04-02 1996-03-05 Unitika, Ltd. Method of treating salt bath liquid

Also Published As

Publication number Publication date
CH594061A5 (en) 1977-12-30
NL7313918A (en) 1974-05-24
FR2207201B1 (en) 1976-04-30
ES419374A1 (en) 1976-03-16
IT1001914B (en) 1976-04-30
DE2256965A1 (en) 1974-05-22
AT324800B (en) 1975-09-25
BR7309114D0 (en) 1974-08-29
BE803965A (en) 1973-12-17

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Legal Events

Date Code Title Description
ST Notification of lapse