EP0058257B1 - Beiz- und Entrostungspaste für Metalle - Google Patents

Beiz- und Entrostungspaste für Metalle Download PDF

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Publication number
EP0058257B1
EP0058257B1 EP81201305A EP81201305A EP0058257B1 EP 0058257 B1 EP0058257 B1 EP 0058257B1 EP 81201305 A EP81201305 A EP 81201305A EP 81201305 A EP81201305 A EP 81201305A EP 0058257 B1 EP0058257 B1 EP 0058257B1
Authority
EP
European Patent Office
Prior art keywords
pickling
paste
aluminum
weight
calculated
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
EP81201305A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0058257A1 (de
Inventor
Joachim Ing. Grad. Geldner
Josef Dipl.-Ing. Rones
Horst Dänzel
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.)
GEA Group AG
Continentale Parker Ste
Continentale Parker SA
Original Assignee
Metallgesellschaft AG
Continentale Parker Ste
Continentale Parker SA
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 Metallgesellschaft AG, Continentale Parker Ste, Continentale Parker SA filed Critical Metallgesellschaft AG
Priority to AT81201305T priority Critical patent/ATE9824T1/de
Publication of EP0058257A1 publication Critical patent/EP0058257A1/de
Application granted granted Critical
Publication of EP0058257B1 publication Critical patent/EP0058257B1/de
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
    • C23G1/025—Cleaning or pickling metallic material with solutions or molten salts with acid solutions acidic pickling pastes

Definitions

  • the invention relates to a pickling and rust removal paste for cleaning metal surfaces, in particular made of steel and / or aluminum, containing fluoride ions.
  • metal surfaces e.g. B. of steel and / or aluminum and their alloy
  • unsightly and corrosion-promoting oxide layers such as z. B. in the heat treatment of metals (welding) or caused by the effect of the environment.
  • acid solutions such. B. based on hydrochloric acid, sulfuric acid, phosphoric acid or hydrofluoric acid.
  • Acidic pastes can also be applied to the areas to be cleaned, especially for large parts or local oxide formation. This dissolves part of the oxides and the base metal attached to them, so that the oxides lose their adhesion to the metal surface. After an appropriate time, they are rinsed off with water or removed by brushing.
  • Such pickling or rust removal paste based on phosphoric acid contains z. B. as a thickener saponifiable oil or a convertible fatty acid into a soap (DE-AS 1082475).
  • Another known cleaning and etching agent consists of hydrofluoric acid, a magnesium compound, at least one acid from the group consisting of nitric acid, phosphoric acid and sulfuric acid in the form of free acid or in the form of their salts and a certain sulfonic acid [DE-AS 19 50 560).
  • the object of the invention is to provide a pickling and rust removal paste for cleaning metal surfaces, in particular made of steel and / or aluminum, which does not have the known disadvantages, in particular those mentioned above, which, even with comparatively small additions of fillers, maintains a pasty consistency that remains can be removed from the metal surface in a simple manner and which can nevertheless be produced with economically justifiable expenditure.
  • the pickling and rust removal paste of the type mentioned at the outset is formulated in accordance with the invention in such a way that it additionally contains a mixture of compounds of calcium and of trivalent iron and / or aluminum and an acidity corresponding to at least 10% by weight. free acid (calculated as 100% HF).
  • the content of calcium and iron and / or aluminum compound in the pickling and rust removal paste is a total of 1 to 10% by weight, in particular 2 to 7% by weight (calculated as a cation).
  • additives are best made in the form of the soluble salts. However, they can also be introduced in the form of other compounds, such as oxides, hydroxides, sulfates and phosphates.
  • Nitrate is preferably used, in particular when cleaning alloyed steels, in particular chromium or nickel steels such as 1.4301, 1.4541, 1.4401, 1.4571, is intended.
  • the proportion of these anions is expediently such that the ratio of the fluoride content to the sum of the sulfate, phosphate, nitrate and / or chloride contents in the finished pickling and rust removal paste is 3: 1 to 1: 6, preferably 1: 1 to 1: 4.
  • the individual additives can be introduced in the form of acids or salts, in particular the calcium, iron or aluminum salts.
  • alkali salts are also possible.
  • a particularly fast-acting pickling and rust removal paste has an acidity corresponding to 15 to 30% by weight of free acid (calculated as 100% HF).
  • the individual calcium or. Iron and / or Aluminum compounds premixed in different acids and then the individual mixtures are combined. However, the calcium or iron and / or aluminum compounds can also be stirred into the premixed acids.
  • the mixture is stirred until it has thickened or else is poured into suitable containers in liquid form. In the latter case, the thickening takes place automatically during storage.
  • the pickling and rust removal pastes according to the invention can be used as manufactured, with brush application being the most common method of application. If necessary, however, it is also possible to dilute the pickling and rust removal paste and spray it onto the metal surface.
  • the paste had a density of approximately 1.25 g / cm 3 and was translucent. There was no separation of the solid constituents of the paste and no development of red nitrous vapors was observed during storage.
  • the pickling and rust removal paste could be thinned with water or acids within certain limits without any significant change in consistency.
  • the paste was used to clean alloy steel. With 1 kg, approx. 120 running meters of a weld seam (with a 5 cm wide application) could be cleaned.
  • the mixture was thin at first, but became anointed after standing for a long time without separating.

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)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Manufacture And Refinement Of Metals (AREA)
EP81201305A 1981-02-14 1981-11-25 Beiz- und Entrostungspaste für Metalle Expired EP0058257B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81201305T ATE9824T1 (de) 1981-02-14 1981-11-25 Beiz- und entrostungspaste fuer metalle.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3105508 1981-02-14
DE19813105508 DE3105508A1 (de) 1981-02-14 1981-02-14 Beiz- und entrostungspaste fuer metalle

Publications (2)

Publication Number Publication Date
EP0058257A1 EP0058257A1 (de) 1982-08-25
EP0058257B1 true EP0058257B1 (de) 1984-10-10

Family

ID=6124944

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81201305A Expired EP0058257B1 (de) 1981-02-14 1981-11-25 Beiz- und Entrostungspaste für Metalle

Country Status (6)

Country Link
US (1) US4400289A (it)
EP (1) EP0058257B1 (it)
AT (1) ATE9824T1 (it)
CA (1) CA1185507A (it)
DE (2) DE3105508A1 (it)
IT (1) IT1157917B (it)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4965095A (en) * 1979-03-30 1990-10-23 Alloy Surfaces Company, Inc. Method for refurbishing used jet engine hot section airfoils
DE3143440A1 (de) * 1981-11-02 1983-05-19 Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe Verfahren zur dekontamination von radioaktiv kontaminierten oberflaechen metallischer werkstoffe
DE3230603A1 (de) * 1982-08-18 1984-02-23 Metallgesellschaft Ag, 6000 Frankfurt Verfahren zur behandlung abgearbeiteter beizpasten
US4496404A (en) * 1984-05-18 1985-01-29 Parker Chemical Company Composition and process for treatment of ferrous substrates
FR2673200A1 (fr) * 1991-02-25 1992-08-28 Ugine Aciers Procede de surdecapage de materiaux en acier tels que les aciers inoxydables et les aciers allies.
DE4212891A1 (de) * 1992-04-17 1993-10-21 Metasco Chemisch Tech Produkte Konzentrat zur Herstellung von Metallbeizmitteln
TW515852B (en) * 1996-04-29 2003-01-01 Ki-Won Lee A method for pickling metallic surface, pickling solutions therefor, and process for regenerating spent pickling solutions
DE19618899A1 (de) * 1996-05-10 1997-11-13 Metallgesellschaft Ag Verfahren zum Entfernen von mit Seifen behafteten Konversionsschichten von metallischen Werkstücken
DE19833990A1 (de) * 1998-07-29 2000-02-10 Metallgesellschaft Ag Beizmittel für Edelstähle
EP2460909B1 (en) 2005-05-19 2017-12-27 Hydro Aluminium Rolled Products GmbH Conditioning of an aluminium strip
US20150211130A1 (en) * 2013-01-07 2015-07-30 Nitto Boseki Co., Ltd Anti-corrosive agent for washing of metal with acid, detergent solution composition, and method for washing of metal
EP3959358B1 (de) * 2019-04-25 2023-06-07 Speira GmbH Oberflächenbehandlung von flachprodukten aus aluminiumlegierungen umfassend farbmessungen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2408424A (en) * 1940-06-15 1946-10-01 Monsanto Chemicals Pickling steels
US2631950A (en) * 1949-09-27 1953-03-17 Rosenfeld Myer Method of and composition for removing rust and scale
GB1279834A (en) 1968-10-07 1972-06-28 Chugai Kasei Co Ltd Improvements in metal cleaning and etching compositions
SE381289B (sv) * 1973-06-21 1975-12-01 Nyby Bruk Ab Tvastegsbetningsforfarande

Also Published As

Publication number Publication date
ATE9824T1 (de) 1984-10-15
DE3166635D1 (en) 1984-11-15
CA1185507A (en) 1985-04-16
IT1157917B (it) 1987-02-18
EP0058257A1 (de) 1982-08-25
US4400289A (en) 1983-08-23
DE3105508A1 (de) 1982-09-02
IT8219530A0 (it) 1982-02-09

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