JPS56501490A - - Google Patents
Info
- Publication number
- JPS56501490A JPS56501490A JP50259280A JP50259280A JPS56501490A JP S56501490 A JPS56501490 A JP S56501490A JP 50259280 A JP50259280 A JP 50259280A JP 50259280 A JP50259280 A JP 50259280A JP S56501490 A JPS56501490 A JP S56501490A
- Authority
- JP
- Japan
- Prior art keywords
- acid
- per litre
- mole per
- agent
- phosphoric acid
- 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.)
- Pending
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.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE7909187 | 1979-11-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56501490A true JPS56501490A (en) | 1981-10-15 |
Family
ID=20339264
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP50259280A Pending JPS56501490A (en) | 1979-11-06 | 1980-11-05 |
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)
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)
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 |
-
1980
- 1980-11-05 AT AT80850166T patent/ATE10016T1/en not_active IP Right Cessation
- 1980-11-05 WO PCT/SE1980/000273 patent/WO1981001298A1/en active IP Right Grant
- 1980-11-05 JP JP50259280A patent/JPS56501490A/ja active Pending
- 1980-11-05 EP EP80850166A patent/EP0029418B1/en not_active Expired
- 1980-11-05 DE DE8080850166T patent/DE3069514D1/en not_active Expired
-
1981
- 1981-06-26 NO NO812196A patent/NO812196L/en unknown
- 1981-06-30 DK DK289081A patent/DK289081A/en not_active Application Discontinuation
- 1981-07-03 FI FI812107A patent/FI68865C/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
FI68865B (en) | 1985-07-31 |
DK289081A (en) | 1981-06-30 |
EP0029418B1 (en) | 1984-10-24 |
ATE10016T1 (en) | 1984-11-15 |
FI812107L (en) | 1981-07-03 |
WO1981001298A1 (en) | 1981-05-14 |
EP0029418A1 (en) | 1981-05-27 |
NO812196L (en) | 1981-06-26 |
FI68865C (en) | 1985-11-11 |
DE3069514D1 (en) | 1984-11-29 |
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