DE2344434B2 - Process for galvanizing steel parts - Google Patents

Process for galvanizing steel parts

Info

Publication number
DE2344434B2
DE2344434B2 DE2344434A DE2344434A DE2344434B2 DE 2344434 B2 DE2344434 B2 DE 2344434B2 DE 2344434 A DE2344434 A DE 2344434A DE 2344434 A DE2344434 A DE 2344434A DE 2344434 B2 DE2344434 B2 DE 2344434B2
Authority
DE
Germany
Prior art keywords
steel parts
galvanizing
zinc
galvanizing steel
metal salts
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.)
Granted
Application number
DE2344434A
Other languages
German (de)
Other versions
DE2344434C3 (en
DE2344434A1 (en
Inventor
Friedel 4830 Guetersloh Kaup
Heinrich 4831 Marienfeld Warnke
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.)
Miele und Cie KG
Original Assignee
Miele und Cie KG
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 Miele und Cie KG filed Critical Miele und Cie KG
Priority to DE2344434A priority Critical patent/DE2344434C3/en
Priority to SE7409725A priority patent/SE443163B/en
Priority to IT25970/74A priority patent/IT1017897B/en
Priority to GB3528774A priority patent/GB1461181A/en
Priority to JP49097139A priority patent/JPS5949309B2/en
Priority to FR7429617A priority patent/FR2242485B1/fr
Publication of DE2344434A1 publication Critical patent/DE2344434A1/en
Priority to US05/636,456 priority patent/US4046646A/en
Publication of DE2344434B2 publication Critical patent/DE2344434B2/en
Application granted granted Critical
Publication of DE2344434C3 publication Critical patent/DE2344434C3/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
    • C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
    • C23D3/00—Chemical treatment of the metal surfaces prior to coating
    • 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
    • C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
    • C23D5/00—Coating with enamels or vitreous layers
    • C23D5/02—Coating with enamels or vitreous layers by wet methods
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/34—Pretreatment of metallic surfaces to be electroplated
    • C25D5/36—Pretreatment of metallic surfaces to be electroplated of iron or steel

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Chemically Coating (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Coating With Molten Metal (AREA)

Description

Die Erfindung betrifft ein Verfahren zum Vorbehandeln von Stahlteilen für eine galvanische Verzinkung, insbesondere für eine anschließende elektrophoretische Emaillierung.The invention relates to a method for pretreating steel parts for galvanizing, especially for subsequent electrophoretic enamelling.

Um eine einwandfreie elektrophoretische Emaillierung zu erzielen, ist es notwendig, die Stahlteile mit einer dünnen Zinkschicht zu versehen.A perfect electrophoretic enamelling To achieve this, it is necessary to coat the steel parts with a thin layer of zinc.

Nachteilig bei den bekannten galvanischen Verzinkungsverfahren ist jedoch, daß die abgeschiedene Zinkschicht ungleichmäßig dick ist. Insbesondere bei bereits verformten Teilen tritt der Nachteil auf, daß an vorstehenden Kanten und Ecken der Zinkbelag größer ist als auf den abgeschirmten Innenflächen eines profilierten Teiles. Die Folge dieser ungleichmäßigen Zinkauflage ist, daß die nachfolgende elektrophoretische Emaillierung nicht einwandfrei wird, da an den strombegünstigten Stellen die Emailhaftung durch die zu starke Zinkauflage gestört wird.A disadvantage of the known galvanic galvanizing process, however, is that the deposited Zinc layer is unevenly thick. In particular with parts that have already been deformed, the disadvantage arises that at protruding edges and corners of the zinc coating is larger than on the shielded inner surfaces of one profiled part. The consequence of this uneven zinc coating is that the subsequent electrophoretic Enamelling is not flawless, as the enamel adhesion is caused by the excessive zinc coating is disturbed.

Die Aufgabe der Erfindung ist, diese bekannten Nachteile zu vermeiden und ein Verfahren zum galvanischen Verzinken von Stahlteilen zu offenbaren.The object of the invention is to avoid these known disadvantages and a method for Galvanizing of steel parts to reveal.

bei welchem die Verzinkung in einer dünnen relativ gleichmäßigen Schicht aufgetragen wird.in which the galvanizing is applied in a thin, relatively even layer.

Zu diesem Zweck ist die Erfindung dadurchTo that end the invention is thereby

ίο gekennzeichnet, daß der Aktivierungslösung Metalle in Form von Metallsalzen zugesetzt werden, welche potentialmäßig edler als Eisen sind.ίο indicated that the activating solution contains metals In the form of metal salts, which are potentially more noble than iron, are added.

Eine vorteilhafte Ausbildung der Erfindung besteht darin, daß als der Aktivierungslösung zugesetzte Metallsalze solche des Kupfers oder des Silbers verwendet werden. Das potentialmäßig edlere Metall setzt sich bei der Aktivierung in einer dünnen nicht geschlossenen Schicht auf der Oberfläche der Stahlteile ab.An advantageous embodiment of the invention is that added as the activating solution Metal salts, those of copper or silver, can be used. The potentially nobler metal When activated, it settles in a thin, non-closed layer on the surface of the steel parts away.

Bei der anschließenden galvanischen Verzinkung der Stahlteile wird die Metallverteilung der Zinks gleichmäßiger in der Stärke, weil in elektrochemischer Hinsicht durch das Vorhandensein von Kupfer oder Silber die Oberfläche aktiver istWhen the steel parts are subsequently galvanized, the metal distribution of the zinc becomes more even in strength because in electrochemical terms due to the presence of copper or silver the Surface is more active

Auf abgeschirmten Innenflächen von profilierten Teilen, welche nur schlecht vom elektrischen Feld erreicht werden, erhält man noch einen Zinkniederschlag, ohne daß an den vorstehenden Kanten und Ecken der Zinkbelag zu dick wird.On shielded inner surfaces of profiled parts, which are poorly affected by the electrical field are reached, a zinc deposit is obtained without the protruding edges and Corners where the zinc coating becomes too thick.

Mit diesem Verfahren lassen sich deshalb besonders dünne und relativ gleichmäßig dicke Zinkauflagen herstellen.With this process, therefore, particularly thin and relatively evenly thick zinc coatings can be created produce.

Claims (2)

Patentansprüche:Patent claims: 1. Verfahren zum Vorbehandeln von Stahlteilen für eine galvanische Verzinkung, insbesondere für eine anschließende elektrophoretische Emaillierung, dadurch gekennzeichnet, daß der Aktivierungslösung Metalle in Form von Metallsalzen zugesetzt werden, weiche potentialmäßig edler als Eisen sind.1. Process for pretreating steel parts for galvanizing, especially for a subsequent electrophoretic enamelling, characterized in that the activating solution Metals are added in the form of metal salts, which are potentially more noble than Are iron. 2. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß als Metallsalze solche von Kupfer oder Silber verwendet werden.2. The method according to claim i, characterized in that that the metal salts used are those of copper or silver.
DE2344434A 1973-09-04 1973-09-04 Process for galvanizing steel parts Expired DE2344434C3 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DE2344434A DE2344434C3 (en) 1973-09-04 1973-09-04 Process for galvanizing steel parts
SE7409725A SE443163B (en) 1973-09-04 1974-07-26 PROCEDURE FOR ELECTROPHORETIC ENAMELING OF HOUSING DETAILS
IT25970/74A IT1017897B (en) 1973-09-04 1974-08-02 PROCEDURE FOR THE GALVANIZING OF STEEL PARTS
GB3528774A GB1461181A (en) 1973-09-04 1974-08-09 Electrophoretic enamelling
JP49097139A JPS5949309B2 (en) 1973-09-04 1974-08-26 Method of enameling steel parts by electrophoresis
FR7429617A FR2242485B1 (en) 1973-09-04 1974-08-30
US05/636,456 US4046646A (en) 1973-09-04 1975-12-01 Method of galvanizing steel parts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2344434A DE2344434C3 (en) 1973-09-04 1973-09-04 Process for galvanizing steel parts

Publications (3)

Publication Number Publication Date
DE2344434A1 DE2344434A1 (en) 1975-04-17
DE2344434B2 true DE2344434B2 (en) 1979-10-11
DE2344434C3 DE2344434C3 (en) 1980-06-19

Family

ID=5891534

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2344434A Expired DE2344434C3 (en) 1973-09-04 1973-09-04 Process for galvanizing steel parts

Country Status (6)

Country Link
JP (1) JPS5949309B2 (en)
DE (1) DE2344434C3 (en)
FR (1) FR2242485B1 (en)
GB (1) GB1461181A (en)
IT (1) IT1017897B (en)
SE (1) SE443163B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52105921A (en) * 1976-03-02 1977-09-06 Nisshin Steel Co Ltd Enamelling method of oneeprocess type
DE2705770B2 (en) * 1977-02-11 1980-03-06 Bego Bremer Goldschlaegerei Wilh. Herbst, 2800 Bremen Method and device for applying a base material layer to a metallic base molding in dental technology
DE2710122A1 (en) * 1977-03-09 1978-09-14 Miele & Cie PROCESS FOR PRE-TREATMENT OF NON-FERROUS METALS BEFORE COATING WITH CERAMIC COMPOUNDS
DE2947188C2 (en) * 1979-11-23 1983-07-14 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Process for the pretreatment of steel parts to be coated electrophoretically with enamel
JPS60169571A (en) * 1984-02-10 1985-09-03 Ig Tech Res Inc Enamel coated steel sheet
DE19745162C2 (en) * 1997-10-14 2002-09-12 Miele & Cie Process for activating a material in an ETE coating process

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2045265C2 (en) * 1970-09-12 1974-01-31 Miele & Cie, 4830 Guetersloh Process for the pretreatment of steel parts to be coated electrophoretically with enamel
US3751289A (en) * 1971-08-20 1973-08-07 M & T Chemicals Inc Method of preparing surfaces for electroplating

Also Published As

Publication number Publication date
FR2242485B1 (en) 1978-08-11
SE443163B (en) 1986-02-17
FR2242485A1 (en) 1975-03-28
GB1461181A (en) 1977-01-13
SE7409725L (en) 1975-03-05
JPS5081928A (en) 1975-07-03
JPS5949309B2 (en) 1984-12-01
IT1017897B (en) 1977-08-10
DE2344434C3 (en) 1980-06-19
DE2344434A1 (en) 1975-04-17

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Legal Events

Date Code Title Description
OGA New person/name/address of the applicant
C3 Grant after two publication steps (3rd publication)
8320 Willingness to grant licences declared (paragraph 23)