FR2010871A6 - Metal surface conditioning - Google Patents

Metal surface conditioning

Info

Publication number
FR2010871A6
FR2010871A6 FR6917505A FR6917505A FR2010871A6 FR 2010871 A6 FR2010871 A6 FR 2010871A6 FR 6917505 A FR6917505 A FR 6917505A FR 6917505 A FR6917505 A FR 6917505A FR 2010871 A6 FR2010871 A6 FR 2010871A6
Authority
FR
France
Prior art keywords
pickling solution
acid pickling
contacting
solution
carbon steel
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
FR6917505A
Other languages
French (fr)
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR2010871A6 publication Critical patent/FR2010871A6/en
Expired 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
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/08—Iron or steel

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)
  • Chemical Treatment Of Metals (AREA)

Abstract

Metal surface conditioning... By contacting the passivated surface of carbon steel, normally unaffected by an acid pickling solution, with a sulphuric or hydrochloride aicd pickling solution for at least five minutes, by contacting the surface thus treated with an aqueous, alkaline permanganate solution containing from about 5 to 50 g/l of an alkali metal permanganate and from approximately 10 to 200 g/l of an alkali metal hydroxide, and then again contacting the surface with an acid pickling solution for a period sufficient to produce a matt finish on the surface. The combination of the acid pickling solution followed by the alkaline permanganate solution attacks the passivated surface of the carbon steel, thus making the acid pickling solution effective in producing a matt finish.
FR6917505A 1968-06-14 1969-05-29 Metal surface conditioning Expired FR2010871A6 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US73696968A 1968-06-14 1968-06-14

Publications (1)

Publication Number Publication Date
FR2010871A6 true FR2010871A6 (en) 1970-02-20

Family

ID=24962072

Family Applications (1)

Application Number Title Priority Date Filing Date
FR6917505A Expired FR2010871A6 (en) 1968-06-14 1969-05-29 Metal surface conditioning

Country Status (3)

Country Link
BE (1) BE733963A (en)
ES (1) ES368314A2 (en)
FR (1) FR2010871A6 (en)

Also Published As

Publication number Publication date
ES368314A2 (en) 1971-05-01
BE733963A (en) 1969-11-17

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