DE613024C - Process for the production of protective coatings on zinc and galvanized objects - Google Patents

Process for the production of protective coatings on zinc and galvanized objects

Info

Publication number
DE613024C
DE613024C DET41089D DET0041089D DE613024C DE 613024 C DE613024 C DE 613024C DE T41089 D DET41089 D DE T41089D DE T0041089 D DET0041089 D DE T0041089D DE 613024 C DE613024 C DE 613024C
Authority
DE
Germany
Prior art keywords
zinc
production
protective coatings
heavy metal
ammonium molybdate
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
DET41089D
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 DET41089D priority Critical patent/DE613024C/en
Application granted granted Critical
Publication of DE613024C publication Critical patent/DE613024C/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
    • C23C22/05—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 using aqueous solutions
    • C23C22/06—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 using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/40—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 using aqueous solutions using aqueous acidic solutions with pH less than 6 containing molybdates, tungstates or vanadates

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)
  • Chemical Treatment Of Metals (AREA)

Description

Verfahren zur Herstellung von Schutzüberzügen auf Zink und verzinkten Gegenständen Die Erfindung betrifft ein Verfahren zur Herstellung von Schutzüberzügen auf Zink und verzinkten Gegenständen.Process for the production of protective coatings on zinc and galvanized Objects The invention relates to a method for producing protective coatings on zinc and galvanized items.

Es ist bekannt, daß eine Tauchlösung aus Ammoniummolybdat farbige Überzüge auf Zink und verzinkten Gegenständen ohne elektrischen Strom ergibt. Auch wurde bereits vorgeschlagen, zu Molybdatlösungen geringe Mengen Schwermetallsalze zuzusetzen. Derartige Tauchlösungen bilden nicht Gegenstand der Erfindung.It is known that a dipping solution of ammonium molybdate colored Coatings on zinc and galvanized objects without electrical current results. Even It has already been proposed to add small amounts of heavy metal salts to molybdate solutions to add. Such immersion solutions do not form the subject of the invention.

Das Wesen der Erfindung besteht darin, daß die Gegenstände in ein Bad aus Schwermetallsulfaten eingetaucht werden, dem Ammoniuntmolybdat zugesetzt ist, wobei der Gehalt an Schwermetallsulfat größer ist als derjenige von Ammoniummolybdat. Die durch das erfindungsgemäße Verfahren erzielte Färbung ist gegenüber ähnlichen Anfärbeverfahren hervorragend. Die Farbtönung ist ganz klar und läßt sich nicht verwischen. Außerdem ist die Haftfähigkeit des überzuges vorzüglich, insbesondere wetterbeständig, und der Überzug selbst ist bäs zu einem gewissen Grade säurebeständig.The essence of the invention is that the objects in a Bath of heavy metal sulfates are immersed, the ammonium molybdate added is, wherein the content of heavy metal sulfate is greater than that of ammonium molybdate. The coloration achieved by the method according to the invention is compared to similar ones Staining process excellent. The color tone is very clear and cannot be blur. In addition, the adhesion of the coating is excellent, especially weatherproof, and the coating itself is acid-resistant to a certain extent.

Gute Ergebnisse erzielt man mit Bädern, die Ammoniummolybdat und Schwermetallsulfate, insbesondere Nickelsulfat, in einem Verhältnis von etwa 1 :21/2 enthalten, wobei der Gehalt an Ammoniumm-oly'bdat bis 2 % und der Gehalt an Schwermetallsulfaten bis 5 % betragen. Außer den genannten Vorteilen zeigen die derartig zusammengesetzten erfindungsgemäßen Tauchbäder gegenüber den bekannten Tauchlösungen aus Ammoniummolybdat bei gleicher Ausnutzung in der Zeiteinheit eine viel größere Gebrauchsdauer, ohne daß die Färbung beeinträchtigt wird.Good results are achieved with baths containing ammonium molybdate and heavy metal sulfates, in particular nickel sulfate, in a ratio of about 1: 21/2, with the ammonium methyl acetate content up to 2% and the heavy metal sulfate content up to 5%. In addition to the advantages mentioned, those compounded in this way show Immersion baths according to the invention compared to the known immersion solutions made of ammonium molybdate with the same utilization in the unit of time, a much longer service life without that the coloring is impaired.

Claims (1)

PATENTANSPRÜCHE: i. Verfahren zur Herstellung von Schutzüberzügen auf Zink und verzinkten Gegenständen ohne Anwendung von elektrischem Strom, dadurch gekennzeichnet, daß die Gegenstände in ein Bad aus Schcvermetallsulfaten eingetaucht werden, dem Ammoniummolybdat zugesetzt ist, wobei der Gehalt an Schwermetallsulfat größer ist als derjenige von Ammoniummolybdat. z. Verfahren nach Anspruch i, gekennzeichnet durch die Verwendung von Nickelsulfat. 3. Verfahren nach Anspruch i, gekennzeichnet durch die Verwendung eines Bades, in dem das Ammoniummolybdat und das Schwermetallsulfat in einem Veihältnis von etwa 1:21/2 enthalten sind.PATENT CLAIMS: i. Process for the production of protective coatings on zinc and galvanized objects without the application of electrical current, thereby characterized in that the articles are immersed in a bath of heavy metal sulfates are added to the ammonium molybdate, the content of heavy metal sulfate is greater than that of ammonium molybdate. z. Method according to claim i, characterized through the use of nickel sulfate. 3. The method according to claim i, characterized by using a bath in which the ammonium molybdate and the heavy metal sulfate are contained in a ratio of about 1: 21/2.
DET41089D 1932-07-19 1932-07-19 Process for the production of protective coatings on zinc and galvanized objects Expired DE613024C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DET41089D DE613024C (en) 1932-07-19 1932-07-19 Process for the production of protective coatings on zinc and galvanized objects

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET41089D DE613024C (en) 1932-07-19 1932-07-19 Process for the production of protective coatings on zinc and galvanized objects

Publications (1)

Publication Number Publication Date
DE613024C true DE613024C (en) 1935-05-10

Family

ID=7560947

Family Applications (1)

Application Number Title Priority Date Filing Date
DET41089D Expired DE613024C (en) 1932-07-19 1932-07-19 Process for the production of protective coatings on zinc and galvanized objects

Country Status (1)

Country Link
DE (1) DE613024C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1633557A1 (en) * 2003-06-05 2006-03-15 Metal Coatings International Inc. Compositions and methods for darkening and imparting corrosion-resistant properties to zinc or other active metals

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1633557A1 (en) * 2003-06-05 2006-03-15 Metal Coatings International Inc. Compositions and methods for darkening and imparting corrosion-resistant properties to zinc or other active metals
EP1633557A4 (en) * 2003-06-05 2010-08-25 Metal Coatings Int Inc Compositions and methods for darkening and imparting corrosion-resistant properties to zinc or other active metals

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