GB928259A - Pickling bath for stainless steel - Google Patents

Pickling bath for stainless steel

Info

Publication number
GB928259A
GB928259A GB13201/62A GB1320162A GB928259A GB 928259 A GB928259 A GB 928259A GB 13201/62 A GB13201/62 A GB 13201/62A GB 1320162 A GB1320162 A GB 1320162A GB 928259 A GB928259 A GB 928259A
Authority
GB
United Kingdom
Prior art keywords
ammonium
acid
stainless steel
solution
pickling bath
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
GB13201/62A
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.)
Montedison SpA
Original Assignee
Montedison SpA
Montecatini Societa Generale per lIndustria Mineraria e Chimica SpA
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 Montedison SpA, Montecatini Societa Generale per lIndustria Mineraria e Chimica SpA filed Critical Montedison SpA
Publication of GB928259A publication Critical patent/GB928259A/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
    • C23G1/086—Iron or steel solutions containing HF

Abstract

Stainless steel is pickled in an aqueous solution containing sulphuric acid, nitric acid and hydrofluoric acid and 2%-10% by weight of ammonium ions. The ammonium ions may be introduced by adding ammonium trifluoride and/or ammonia or other ammonium salts and in this way hydrofluoric acid handling is avoided. A preferred pickling solution consists of by weight 15%-35% sulphuric acid, 5%-20% nitric acid, 5%-15% ammonium trifluoride which is equivalent to 2.5%-10% hydrofluoric acid, 0%-10% ammonium sulphate and 75%-20% water. The stainless steel is pickled in the solution in a single stage at 50 DEG C. Hydrochloric acid should not be present in the solution.
GB13201/62A 1961-04-10 1962-04-05 Pickling bath for stainless steel Expired GB928259A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT651561 1961-04-10

Publications (1)

Publication Number Publication Date
GB928259A true GB928259A (en) 1963-06-12

Family

ID=11121175

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13201/62A Expired GB928259A (en) 1961-04-10 1962-04-05 Pickling bath for stainless steel

Country Status (7)

Country Link
US (1) US3230172A (en)
BE (1) BE616164A (en)
CH (1) CH429370A (en)
DE (1) DE1220699B (en)
GB (1) GB928259A (en)
LU (1) LU41512A1 (en)
SE (1) SE312469B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3448055A (en) * 1965-03-31 1969-06-03 Diversey Corp Aluminum alloy deoxidizing-desmutting composition and method
DE2559289B2 (en) * 1975-12-31 1981-04-09 Haug Chemie GmbH & Co KG, 6920 Sinsheim Agent for chemical descaling, pickling and polishing of stainless steel
GB2048311A (en) * 1979-04-12 1980-12-10 Sumitomo Metal Ind Chemical pickling stainless steel
US4470920A (en) * 1981-05-11 1984-09-11 Custom Research And Development Metal oxide remover for stainless steels
US4592854A (en) * 1985-01-09 1986-06-03 Mcdonnell Douglas Corporation Steel etchant
US4915782A (en) * 1988-12-21 1990-04-10 Mcdonnell Douglas Corporation Aluminum lithium etchant
JP3992977B2 (en) * 2001-12-25 2007-10-17 株式会社パーカーコーポレーション Surface finishing method after descaling of stainless steel
FR2883575B1 (en) * 2005-03-22 2007-10-19 Airbus France Sas STAINLESS STEEL STRIPPING SOLUTION AND STAINLESS STEEL STRIPPING METHOD

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2000576A (en) * 1934-03-01 1935-05-07 Grasselli Chemical Co Mordant
US2337062A (en) * 1942-04-07 1943-12-21 Solar Aircraft Co Pickling solution and method
US2620265A (en) * 1950-09-28 1952-12-02 Kaiser Aluminium Chem Corp Composition for treating aluminum and aluminum alloys
US2694657A (en) * 1950-10-04 1954-11-16 Ekstrand & Tholand Inc Pickling ferrous metals
US2614913A (en) * 1950-10-20 1952-10-21 Gen Motors Corp Brightening bath
US2828193A (en) * 1954-08-09 1958-03-25 Turco Products Inc Method for rejuvenation of aluminum treating solutions
GB791887A (en) * 1954-12-16 1958-03-12 Philco Corp Method of de-oxidising metal surfaces
US2878189A (en) * 1954-12-16 1959-03-17 Philco Corp Method of de-oxidizing metal surfaces
US3094489A (en) * 1959-08-31 1963-06-18 Monsanto Chemicals Method and composition for brightening aluminum

Also Published As

Publication number Publication date
LU41512A1 (en) 1963-04-08
DE1220699B (en) 1966-07-07
CH429370A (en) 1967-01-31
SE312469B (en) 1969-07-14
BE616164A (en) 1962-07-31
US3230172A (en) 1966-01-18

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