DE375426C - Procedure for derusting - Google Patents

Procedure for derusting

Info

Publication number
DE375426C
DE375426C DEK83362D DEK0083362D DE375426C DE 375426 C DE375426 C DE 375426C DE K83362 D DEK83362 D DE K83362D DE K0083362 D DEK0083362 D DE K0083362D DE 375426 C DE375426 C DE 375426C
Authority
DE
Germany
Prior art keywords
rust
iron
derusting
procedure
acids
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
DEK83362D
Other languages
German (de)
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
Priority to DEK83362D priority Critical patent/DE375426C/en
Application granted granted Critical
Publication of DE375426C publication Critical patent/DE375426C/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23GCLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/08Iron or steel
    • C23G1/088Iron or steel solutions containing organic acids

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)

Description

Verfahren zur Entrostung Eisenrost besteht aus Oxyden bzw. Karbonaten des Eisens. Eine Entrostung kann auf mechanische Weise, z. B. durch Abkratzen mit einer- Stahlbürste, mittels Sandstrahlgebläse usw., oder aber auf rein chemischem Uege herbeigeführt werden. In dieser Hinsieht kann man zwei verschiedene Arten der Entrostung unterscheiden.Process for derusting Iron rust consists of oxides or carbonates of iron. Rust removal can be done in a mechanical way, e.g. B. by scraping with a steel brush, by means of a sandblasting blower, etc., or purely chemical Uege be brought about. In this regard, there are two different types of Distinguish rust removal.

Die eine führt den Eisenrost in Verbindungen über, die das -Metall vor weiterem Rostangriff-; schützen. So führt das Patent 223085 die Rostschicht in eine Farblackschicht über.One converts the iron rust into compounds that protect the metal from further rust attack; protection. Patent 223085, for example, converts the rust layer into a layer of colored lacquer.

Die zweite Art chemischer Entrostung löst die Rostschicht unter Bildung von Eisensalzen auf. Die Mittel der letzteren Art sind meist mehr oder weniger starke Säuren, die ebenso wie die mechanische Rostentfernung das metallische noch nicht in Rost verwandelte Eisen stark angreifen und für viele Zwecke deshalb nicht in Betracht kommen.The second type of chemical rust removal loosens the rust layer and forms it of iron salts. The remedies of the latter kind are usually more or less strong Acids which, like mechanical rust removal, are not metallic yet strongly attack iron transformed into rust and therefore not in Come into consideration.

Vorliegendes Verfahren geht nun von sehr schwachen anorganischen bzw. organischen Säuren aus, die stark reduzierende Eigenschaften haben und das metallische Eisen praktisch nicht angreifen.The present process is based on very weak inorganic or organic acids, which have strong reducing properties and the metallic Practically no attack on iron.

Legt man einen Rostgegenstand in eine wässerige Lösung von phosphoriger Säure, unterphosphoriger Säure, Ameisensäure oder in eine Mischung dieser Säuren, so fällt der Rost als basische Eisensalze der entsprechenden Säuren je nach Stärke in kürzerer oder längerer Zeit vollkommen ab, ohne daß das dadurch bloßgelegte Metall im geringsten angegriffen wird. Letzteres erhält vielmehr eine schwarze glatte Oberfläche von metallischem Eisen, das durch. Polieren leicht in eine glänzende spiegelnde Metallfläche zu verwandeln ist.If you put a rust object in an aqueous solution of phosphorous Acid, hypophosphorous acid, formic acid or a mixture of these acids, so the rust falls as basic iron salts of the corresponding acids depending on the strength in a shorter or longer time completely, without the exposed metal is attacked in the slightest. Rather, the latter is given a black, smooth surface of metallic iron passing through. Lightly buff into a shiny reflective finish Metal surface is to be transformed.

Beispiel: Man legt den Rostgegenstand in eine wässerige Lösung von ioprozentiger phosphoriger und ioprozentiger Ameisensäure und spült ihn nach dem Abfallen des Rostes mit Wasser ab.Example: You put the rust object in an aqueous solution of 10 percent phosphorous and 10 percent formic acid and rinses it after the The grate falls off with water.

Claims (1)

PATENTT-ANSPRUCH: erfahren zur Entrostung von Gegenständen, dadurch gekennzeichnet, daß man den Gegenstand mit einer stark reduzierenden, das Metall wenig angreifenden Säure, insbesondere mit phosphoriger, unterphosphoriger, Ameisensäure oder mit einer Mischung dieser Säuren, in Berührung bringt, wodurch der Rost vollständig abfällt.PATENT CLAIM: experienced in removing rust from objects, thereby characterized that the object with a strongly reducing, the metal Little aggressive acid, especially with phosphorous, hypophosphorous, formic acid or with a mixture of these acids, causing the rust to complete falls off.
DEK83362D 1922-09-12 1922-09-12 Procedure for derusting Expired DE375426C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEK83362D DE375426C (en) 1922-09-12 1922-09-12 Procedure for derusting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK83362D DE375426C (en) 1922-09-12 1922-09-12 Procedure for derusting

Publications (1)

Publication Number Publication Date
DE375426C true DE375426C (en) 1923-05-12

Family

ID=7234747

Family Applications (1)

Application Number Title Priority Date Filing Date
DEK83362D Expired DE375426C (en) 1922-09-12 1922-09-12 Procedure for derusting

Country Status (1)

Country Link
DE (1) DE375426C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2493327A (en) * 1946-09-27 1950-01-03 Kelite Products Inc Aqueous composition for treating iron and steel
US2793191A (en) * 1954-04-15 1957-05-21 Du Pont Corrosion inhibition of monobasic acids
EP0375167A1 (en) * 1988-11-29 1990-06-27 BP Chemicals Limited Cleansing compositions

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2493327A (en) * 1946-09-27 1950-01-03 Kelite Products Inc Aqueous composition for treating iron and steel
US2793191A (en) * 1954-04-15 1957-05-21 Du Pont Corrosion inhibition of monobasic acids
EP0375167A1 (en) * 1988-11-29 1990-06-27 BP Chemicals Limited Cleansing compositions
US5034148A (en) * 1988-11-29 1991-07-23 Bp Chemicals Limited Cleansing compositions

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