DK289081A - PROCEDURE FOR ACID CLEANING OF IRON AND IRON ALLOYES AND MEDICINE FOR CARRYING OUT THE PROCEDURE - Google Patents

PROCEDURE FOR ACID CLEANING OF IRON AND IRON ALLOYES AND MEDICINE FOR CARRYING OUT THE PROCEDURE

Info

Publication number
DK289081A
DK289081A DK289081A DK289081A DK289081A DK 289081 A DK289081 A DK 289081A DK 289081 A DK289081 A DK 289081A DK 289081 A DK289081 A DK 289081A DK 289081 A DK289081 A DK 289081A
Authority
DK
Denmark
Prior art keywords
acid
per litre
mole per
iron
procedure
Prior art date
Application number
DK289081A
Other languages
Danish (da)
Inventor
R J V Niklasson
R O Nilsson
P E Nobel
Original Assignee
Boliden Ab
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 Boliden Ab filed Critical Boliden Ab
Publication of DK289081A publication Critical patent/DK289081A/en

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
    • C23G1/083—Iron or steel solutions containing H3PO4

Abstract

The invention relates to a method of acid pickling metallic material having an iron content of at least about 80 per cent by weight, while simultaneously inhibiting exposed metal surfaces against dissolution by acid attack. The method comprises bringing the material into contact with an aqueous solution containing phosphoric acid and one or both of the mineral acids hydrochloric acid and sulphuric acid. The phosphoric acid concentration is adjusted to at least about 0.01 mole per litre and at most about 1 mole per litre, while the total acid concentration is adjusted to the range between about 0.5 and 4 mole per litre. The invention also relates to a pickling agent for carrying out the method. The agent contains one or both of the mineral acids hydrochloric acid and sulphuric acid and has a total acid concentration of between about 0.5 and 4 mole per litre. The agent contains as an inhibitor phosphoric acid in a amount of at least about 0.01 mole per litre and at most about 1 mole per litre. The agent may also contain Fe(II)-ions.
DK289081A 1979-11-06 1981-06-30 PROCEDURE FOR ACID CLEANING OF IRON AND IRON ALLOYES AND MEDICINE FOR CARRYING OUT THE PROCEDURE DK289081A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE7909187 1979-11-06
PCT/SE1980/000273 WO1981001298A1 (en) 1979-11-06 1980-11-05 A method of acid pickling iron and iron alloys and a composition for carrying out the method

Publications (1)

Publication Number Publication Date
DK289081A true DK289081A (en) 1981-06-30

Family

ID=20339264

Family Applications (1)

Application Number Title Priority Date Filing Date
DK289081A DK289081A (en) 1979-11-06 1981-06-30 PROCEDURE FOR ACID CLEANING OF IRON AND IRON ALLOYES AND MEDICINE FOR CARRYING OUT THE PROCEDURE

Country Status (8)

Country Link
EP (1) EP0029418B1 (en)
JP (1) JPS56501490A (en)
AT (1) ATE10016T1 (en)
DE (1) DE3069514D1 (en)
DK (1) DK289081A (en)
FI (1) FI68865C (en)
NO (1) NO812196L (en)
WO (1) WO1981001298A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2288190A (en) * 1994-04-08 1995-10-11 Wonder Wheels Cleaning composition containing hydrochloric acid
US6420178B1 (en) * 2000-09-20 2002-07-16 General Electric Company High throughput screening method, array assembly and system
US10450668B2 (en) 2017-04-11 2019-10-22 Savannah River Nuclear Solutions, Llc Development of a passivated stainless steel surface
CN108930043A (en) * 2018-08-15 2018-12-04 东莞市同盛电子科技有限公司 A kind of cleaning agent and preparation method thereof removing metal oxide layer and application method

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU152603A3 (en) * 1900-01-01
US1279331A (en) * 1918-05-11 1918-09-17 James H Gravell Pickling iron and steel.
US2559445A (en) * 1946-12-12 1951-07-03 Union Switch & Signal Co Method for removing scale from steel
FR1148779A (en) * 1956-02-01 1957-12-13 Process for protecting metals against corrosion by strong acids and compositions for the implementation of this process
US2923608A (en) * 1956-04-13 1960-02-02 Fmc Corp Method of improving the bonding properties of steel surfaces
BE579543A (en) * 1958-06-19
US3438799A (en) * 1965-06-22 1969-04-15 Chem Eng Ltd Method for the surface treatment of metal articles
US3457107A (en) * 1965-07-20 1969-07-22 Diversey Corp Method and composition for chemically polishing metals
BE740608A (en) * 1968-10-22 1970-04-01 Metal cleaning and protection process
BE790538A (en) * 1971-10-26 1973-02-15 Ericsson Telefon Ab L M ALUMINUM CHEMICAL CLEANING BATH
FR2208006A1 (en) * 1972-11-24 1974-06-21 Produits Ind Cie Fse De-passivation of stainless steel - prior to plating or coating with copper, nickel, chromium, zinc, manganese, oxalate or phosphate

Also Published As

Publication number Publication date
WO1981001298A1 (en) 1981-05-14
FI68865C (en) 1985-11-11
NO812196L (en) 1981-06-26
JPS56501490A (en) 1981-10-15
EP0029418B1 (en) 1984-10-24
DE3069514D1 (en) 1984-11-29
EP0029418A1 (en) 1981-05-27
ATE10016T1 (en) 1984-11-15
FI812107L (en) 1981-07-03
FI68865B (en) 1985-07-31

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Legal Events

Date Code Title Description
AHB Application shelved due to non-payment