DE937448C - Flushing fluid for phosphated metals - Google Patents

Flushing fluid for phosphated metals

Info

Publication number
DE937448C
DE937448C DEH2839D DEH0002839D DE937448C DE 937448 C DE937448 C DE 937448C DE H2839 D DEH2839 D DE H2839D DE H0002839 D DEH0002839 D DE H0002839D DE 937448 C DE937448 C DE 937448C
Authority
DE
Germany
Prior art keywords
flushing fluid
phosphated
metals
phosphated metals
parts
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
DEH2839D
Other languages
German (de)
Inventor
August Kettenbach
Hans Rogner
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.)
Henkel AG and Co KGaA
Original Assignee
Henkel AG and Co KGaA
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 Henkel AG and Co KGaA filed Critical Henkel AG and Co KGaA
Priority to DEH2839D priority Critical patent/DE937448C/en
Application granted granted Critical
Publication of DE937448C publication Critical patent/DE937448C/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
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/82—After-treatment
    • C23C22/83—Chemical after-treatment

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Detergent Compositions (AREA)

Description

Spülflüssigkeit für phosphatierte Metalle Bei der Phosphatierung mit üblichen Lösungen von primären, d. h. sauren Schwermetallphosphaten treten, wenn der Spülprozeß nur mit Wasser und gegebenenfalls unter Neutralisation der restlichen Phosphatierungsflüssigkeit, z. B. mit schwacher Sodalösung, erfolgt, dennoch leicht Korrosionen auf. Man hat daher bereits vorgeschlagen, saubere Chromatlösungen sowie Chromsäurelösungen als Spülflüssigkeit für phosphatierte Metalle zu verwenden. Von wirtschaftlichen Gesichtspunkten ganz abgesehen, besitzen diese Spülflüssigkeiten den Nachteil, daß mit ihrer Anwendung die Gefahr des Auftretens von erheblichen Hautschädigungen verbunden ist. Es wurde nun gefunden, daß man überraschen derweise die Nachteile der Korrosion bei phosphatierten Metallen ebenfalls vermeiden kann, wenn man die phosphatierten Metalle mit Spülflüssigkeiten behandelt, die aus einer wäßrigen Lösung eines Natriummetasilikat und Natriumnitrit enthaltenden Gemisches bestehen. Vorteilhaft kann die wäßrige Lösung eines aus etwa 65 Teilen Natriummetasilikat und 35 Teilen Nitrit bestehenden Gemisches verwendet werden.Rinsing liquid for phosphated metals When phosphating with usual solutions of primary, d. H. heavy metal acid phosphates occur, though the rinsing process only with water and, if necessary, with neutralization of the rest Phosphating liquid, e.g. B. with weak soda solution, takes place, but easily Corrosion. It has therefore been suggested to use clean chromate solutions as well Use chromic acid solutions as rinsing liquids for phosphated metals. from Quite apart from economic considerations, these rinsing liquids have the disadvantage that with their use the risk of occurrence of considerable Skin damage is associated. It has now been found that one is surprising in such a way can also avoid the disadvantages of corrosion in phosphated metals, if you treat the phosphated metals with rinsing liquids that come from a aqueous solution of a mixture containing sodium metasilicate and sodium nitrite exist. The aqueous solution can advantageously be one of about 65 parts of sodium metasilicate and 35 parts of nitrite existing mixture can be used.

Da die erfindungsgemäß zur Anwendung gelangenden Lösungen bzw. die dazu benötigten Salze besonders leicht zugänglich sind und keinen Anlaß für Hautschädigungen geben, ist mit ihrer Verwendüng ein erheblicher technischer Fortschritt verbunden.Since the solutions used according to the invention or the the salts required for this are particularly easily accessible and do not cause skin damage give is with their use a significant technical advance tied together.

Beispiel Ein mit einer Lösung von primären Schwermetallphosphaten üblicher Zusammensetzung behandeltes Blech wird kurz mit Wasser und dann anschließend mit einer o,5°/oigenLösung eines 65 Teile Natriummetasilikat und 35 Teile Natriumnitrit enthaltenden Gemisches gespült. Das auf diese Weise behandelte Blech neigt im Gegensatz- -zu einem' mit Phosphatgemisch behandelten und nur mit Wasser gespülten Eisenblech nicht zum Rosten.Example one with a solution of primary heavy metal phosphates Sheet metal treated with the usual composition is briefly with water and then afterwards with an 0.5% solution of 65 parts of sodium metasilicate and 35 parts of sodium nitrite containing mixture rinsed. The sheet metal treated in this way tends to -to an iron sheet treated with a phosphate mixture and rinsed only with water not to rust.

Claims (1)

PATENTANSPRUCH: Verwendung von wäßrigen Lösungen eines Natriummetasilikat und Natriumnitrit enthaltenden Gemisches als Spülflüssigkeit für phosphatierte Metalle.PATENT CLAIM: Use of aqueous solutions of a sodium metasilicate and mixtures containing sodium nitrite as rinsing liquid for phosphated metals.
DEH2839D 1940-11-09 1940-11-09 Flushing fluid for phosphated metals Expired DE937448C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEH2839D DE937448C (en) 1940-11-09 1940-11-09 Flushing fluid for phosphated metals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH2839D DE937448C (en) 1940-11-09 1940-11-09 Flushing fluid for phosphated metals

Publications (1)

Publication Number Publication Date
DE937448C true DE937448C (en) 1956-01-05

Family

ID=7143264

Family Applications (1)

Application Number Title Priority Date Filing Date
DEH2839D Expired DE937448C (en) 1940-11-09 1940-11-09 Flushing fluid for phosphated metals

Country Status (1)

Country Link
DE (1) DE937448C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2504156A1 (en) * 1981-04-16 1982-10-22 Hooker Chemicals Plastics Corp PASSIVATION PRODUCT SOLUTION HAVING CHROMIC ASPECT AND METHOD OF USE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2504156A1 (en) * 1981-04-16 1982-10-22 Hooker Chemicals Plastics Corp PASSIVATION PRODUCT SOLUTION HAVING CHROMIC ASPECT AND METHOD OF USE

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