DE458632C - Process for the production of protective coatings from chrome - Google Patents

Process for the production of protective coatings from chrome

Info

Publication number
DE458632C
DE458632C DEL60923D DEL0060923D DE458632C DE 458632 C DE458632 C DE 458632C DE L60923 D DEL60923 D DE L60923D DE L0060923 D DEL0060923 D DE L0060923D DE 458632 C DE458632 C DE 458632C
Authority
DE
Germany
Prior art keywords
chrome
production
protective coatings
zinc
lead
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
DEL60923D
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.)
ELEKTRO CHROM GmbH
Original Assignee
ELEKTRO CHROM GmbH
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 ELEKTRO CHROM GmbH filed Critical ELEKTRO CHROM GmbH
Priority to DEL60923D priority Critical patent/DE458632C/en
Application granted granted Critical
Publication of DE458632C publication Critical patent/DE458632C/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
    • C23CCOATING 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
    • C23C28/00Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
    • C23C28/023Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only

Description

Verfahren zur Erzeugung von Schutzüberzügen aus Chrom. E: ist bekannt. leicht korrodierbare Metalle durch Decküberzüge von Kadmiutn, Blei oder Zink zii schützen. Diese Metalle, welche sich nach verschiedenen Verfahren auftragen lassen. bieten durch die Dichtigkeit ihrer überziige und durch die Hvdroxvde bzw. Oxvde, «-elche : ie in Luft und Feuchtigkeit als Oberflächenschichten bilden, guten Schutz gegen Wasser. Feuchtigkeit und Atmosphärilien. Ge-en Säuren sind sie jedoch nicht widersta:idsfähig.Process for the production of protective coatings from chrome. E: is known. Easily corrodible metals through top coatings of Kadmiutn, lead or zinc zii protection. These metals, which can be applied using various methods. offer through the tightness of their overlays and through the Hvdroxvde or Oxvde, «-Which: they form surface layers in air and moisture, good protection against water. Humidity and atmospherics. However, they are not Ge-en acids resistant.

1)a. Chrom, welches sich ebenfalls nach ver#:citic#deneci Verfahren auf anderen Metallen in dünnen Schichten auftragen läßt, bietet zwar einen guten -Schutz gegen Säuren, hat aber den Nachteil. daß es nicht wie Kadmium, Blei und Zink Hvdroxvde bzw. Oxyde bildet, «-elche etwa vorhandene feine Poren in den 'Metallschichten verstopfen, vor allem aber hat es den Nachteil, daB es edler als das Eisen und die meisten anderen Werkmetalle ist, so daß bei etwa durch vorhandene Poren durchdringender Feuchtigkeit feine punktförmige Korrosionen auftreten können.1) a. Chromium, which is also produced according to the ver #: citic # deneci process Can be applied in thin layers on other metals, offers a good one -Protection against acids, but has the disadvantage. that it doesn't like cadmium, and lead Zinc Hvdroxvde or oxide forms, "-which possibly existing fine pores in the 'metal layers clog, but above all it has the disadvantage that it is more noble than iron and the Most of the other working metals are so that it penetrates through existing pores Moisture fine punctiform corrosion can occur.

Diesem letzteren Übelstand kann mit großem Erfolg dadurch begegnet Nverden, daß man das zu schützende Metall vorher mit einer Schicht Kadmium, Blei oder Zink nach einem der bekannten '\-erfahren überzieht und dann erst eine Schicht von Chrom galvanisch oder nach irgendeinem anderen bekannten Verfahren aufträgt.The latter can be countered with great success Nverden that the metal to be protected has been coated beforehand with a layer of cadmium or lead or zinc is coated according to one of the well-known processes and only then a layer of chromium electroplated or by any other known method.

Claims (1)

PATENTANSPRUCH: Verfahren zur Erzeugung von Schutzüberzügen aus Chrom, dadurch gekennzeichnet, daß vor der Chromierung eine Zwischenschicht aus Kadmium oder Blei oder Zink auf dem zu schützenden Grundmetall hergestellt wird.PATENT CLAIM: Process for the production of protective coatings from chrome, characterized in that an intermediate layer of cadmium prior to chroming or lead or zinc is produced on the base metal to be protected.
DEL60923D 1924-08-09 1924-08-09 Process for the production of protective coatings from chrome Expired DE458632C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEL60923D DE458632C (en) 1924-08-09 1924-08-09 Process for the production of protective coatings from chrome

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL60923D DE458632C (en) 1924-08-09 1924-08-09 Process for the production of protective coatings from chrome

Publications (1)

Publication Number Publication Date
DE458632C true DE458632C (en) 1928-04-16

Family

ID=7280217

Family Applications (1)

Application Number Title Priority Date Filing Date
DEL60923D Expired DE458632C (en) 1924-08-09 1924-08-09 Process for the production of protective coatings from chrome

Country Status (1)

Country Link
DE (1) DE458632C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3428441A (en) * 1965-07-28 1969-02-18 Kewanee Oil Co Article coated with a composite particulate,microporous chromium coating and method of producing said article

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3428441A (en) * 1965-07-28 1969-02-18 Kewanee Oil Co Article coated with a composite particulate,microporous chromium coating and method of producing said article

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