DE913121C - Metal saving stain - Google Patents

Metal saving stain

Info

Publication number
DE913121C
DE913121C DEC4151A DEC0004151A DE913121C DE 913121 C DE913121 C DE 913121C DE C4151 A DEC4151 A DE C4151A DE C0004151 A DEC0004151 A DE C0004151A DE 913121 C DE913121 C DE 913121C
Authority
DE
Germany
Prior art keywords
acid
stain
metal
pickling
saving
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
DEC4151A
Other languages
German (de)
Inventor
Wilhelm Schneider
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.)
CHEMISCHES LAB FRESENIUS
Original Assignee
CHEMISCHES LAB FRESENIUS
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 CHEMISCHES LAB FRESENIUS filed Critical CHEMISCHES LAB FRESENIUS
Priority to DEC4151A priority Critical patent/DE913121C/en
Application granted granted Critical
Publication of DE913121C publication Critical patent/DE913121C/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
    • C23G1/04—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors
    • C23G1/06—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors

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

Metallsparbeize Bekanntlich werden Metalle beim Behandeln mit Säuren stark angegriffen. Um diesen Metallangriff herabzusetzen, werden den Beizsäuren Hemmstoffe zugesetzt.Metal saving stain It is well known that metals are treated with acids heavily attacked. Pickling acids are used to reduce this metal attack Inhibitors added.

Es ist schon seit langem bekannt, daß organische Stoffe der verschiedensten Art eine Inhibitorwirkung in Beizlösungen hervorrufen. Auch mit konzentrierter Säure erhitzter Zellstoff ist schon als Zusatzmittel vorgeschlagen worden, aber ohne daß die Technik in den vielen Jahren, die seit dem Bekanntwerden dieses Vorschlags verstrichen sind, diesem Vorschlag nachgegangen ist.It has long been known that organic substances of the most varied Kind of causing an inhibitory effect in pickling solutions. Even with concentrated acid Heated pulp has been suggested as an additive, but without that the technique in the many years since this proposal became known have followed up on this suggestion.

Es wurde nun gefunden, daß wasserlöslicher Celluloseäther eine sehr gute Sparbeizwirkung hat, wenn er in Beizsäuren verwendet wird. Die bekannte Verwendung als Verdickungsmittel in Phosphorsäure zur Herstellung einer Paste ließ auf eine Eignung als Inhibitor bei Beizsäuren nicht schließen, da Phosphorsäure im allgemeinen nicht als Beizsäure verwendet wird.It has now been found that water-soluble cellulose ether is a very has a good saving pickling effect when it is used in pickling acids. The familiar use as a thickener in phosphoric acid to make a paste left on a Suitability as an inhibitor for pickling acids does not conclude, as phosphoric acid in general is not used as a pickling acid.

Es wurde darüber hinaus gefunden, daß bei einem Zusatz von o, i bis :2% von wasserlöslichem Celluloseäther, insbesondere von Oxäthyl-methylcellulose, zur Beizsäure der nicht gewünschte starke Metallangriff, z. B. beim Entrosten, beträchtlich (auf etwa 1/1o Je nach Konzentration) herabgemindert wird, während die entrostendeWirkung gegenüber der reinen Säure nur wenig beeinträchtigt wird. Die Gefahr der Unterdosierung, daß bei einem zu geringen Zusatz der Metallsparbeize die Beizsäure das Metall stärker angreift als die reine Säure, wurde nicht beobachtet. Durch Erhöhung der Konzentration der Metallsparbeize kann die Beizsäure auch in pastöser Form hergestellt werden. Durch Zusatz von an sich bekannten Hemmstoffen in Form von organischen Basen, wie Hexamethylentetramin, Chinolin, Py ridin, Toluidin, in Konzentrationen von o,oi bis o,i l/o kann die Schutzwirkung noch gesteigert werden.It was also found that with the addition of o, i to : 2% of water-soluble cellulose ether, especially of oxethyl-methyl cellulose, for pickling acid the undesired strong metal attack, z. B. when derusting, considerably (to about 1 / 1o depending on the concentration) is reduced while the rust removal effect is only slightly affected compared to the pure acid. The risk of underdosing, that with too little addition of the metal-saving pickling acid, the pickling acid makes the metal stronger attacks than the pure acid has not been observed. By increasing the Concentration of the metal sparing stain, the pickling acid can also be produced in paste form will. By adding inhibitors known per se in the form of organic bases, such as hexamethylenetetramine, quinoline, pyridine, toluidine, in concentrations of o, oi The protective effect can be increased even further up to o, i l / o.

Claims (1)

PATENTANSPRÜCHE: i. Metallsparbeize, bestehend aus einem wasserlöslichen Celluloseäther, vorzugsweise Oxäthyl-methyl-cellulose, als Zusatz zu den Beizsäuren, wie Salzsäure, Schwefelsäure, Salpetersäure, Oxalsäure, saure Sulfate oder Mischungen einzelner derselben, mit Ausnahme der Phosphorsäure. -2. Metallsparbeize nach Anspruch i, dadurch gekennzeichnet, daß diese noch eine organische Base, z. B. Hexamethylentetramin, Chinolin, Pyridin, Toluidin, enthält. Angezogene Druckschriften: Otto Vogel, »Handbuch der Metallbeizerei«, Bd.11, 1943, S.42; deutsche Patentschrift Nr. 734 644; USA.-Patentschrift Nr. 2 221 968.PATENT CLAIMS: i. Metal sparing stain, consisting of a water-soluble Cellulose ether, preferably oxethyl-methyl-cellulose, as an additive to the pickling acids, such as hydrochloric acid, sulfuric acid, nitric acid, oxalic acid, acid sulfates or mixtures some of them, with the exception of phosphoric acid. -2. Metal saving stain according to claim i, characterized in that it is also an organic base, e.g. B. hexamethylenetetramine, Contains quinoline, pyridine, toluidine. Printed publications: Otto Vogel, »Handbuch der Metallbeizerei «, Vol.11, 1943, p.42; German Patent No. 734,644; U.S. Patent No. 2,221,968.
DEC4151A 1951-05-05 1951-05-05 Metal saving stain Expired DE913121C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEC4151A DE913121C (en) 1951-05-05 1951-05-05 Metal saving stain

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEC4151A DE913121C (en) 1951-05-05 1951-05-05 Metal saving stain

Publications (1)

Publication Number Publication Date
DE913121C true DE913121C (en) 1954-06-08

Family

ID=7013286

Family Applications (1)

Application Number Title Priority Date Filing Date
DEC4151A Expired DE913121C (en) 1951-05-05 1951-05-05 Metal saving stain

Country Status (1)

Country Link
DE (1) DE913121C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3041285A (en) * 1955-05-27 1962-06-26 Purex Corp Ltd Composition for cleaning and polishing aluminum and aluminum alloys

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2221968A (en) * 1940-02-16 1940-11-19 Friedmann Herbert Rust remover
DE734644C (en) * 1939-04-28 1943-04-20 Franz Loepki Rust remover

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE734644C (en) * 1939-04-28 1943-04-20 Franz Loepki Rust remover
US2221968A (en) * 1940-02-16 1940-11-19 Friedmann Herbert Rust remover

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3041285A (en) * 1955-05-27 1962-06-26 Purex Corp Ltd Composition for cleaning and polishing aluminum and aluminum alloys

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