EP1443129A1 - Procédé d'usinage d'une pièce métallique - Google Patents

Procédé d'usinage d'une pièce métallique Download PDF

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Publication number
EP1443129A1
EP1443129A1 EP03014048A EP03014048A EP1443129A1 EP 1443129 A1 EP1443129 A1 EP 1443129A1 EP 03014048 A EP03014048 A EP 03014048A EP 03014048 A EP03014048 A EP 03014048A EP 1443129 A1 EP1443129 A1 EP 1443129A1
Authority
EP
European Patent Office
Prior art keywords
metallic
surface section
workpiece
electropolishing
lacquer layer
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.)
Withdrawn
Application number
EP03014048A
Other languages
German (de)
English (en)
Inventor
Peter Jörg Prof. Dr. Plath
Magnus Dr. Buhlert
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.)
Mir-Chem GmbH
Original Assignee
Mir-Chem 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 Mir-Chem GmbH filed Critical Mir-Chem GmbH
Publication of EP1443129A1 publication Critical patent/EP1443129A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • 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
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F3/00—Brightening metals by chemical means
    • C23F3/04—Heavy metals
    • C23F3/06—Heavy metals with acidic solutions
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
    • C25F1/02—Pickling; Descaling
    • C25F1/04—Pickling; Descaling in solution
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
    • C25F1/02—Pickling; Descaling
    • C25F1/04—Pickling; Descaling in solution
    • C25F1/06—Iron or steel
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F3/00—Electrolytic etching or polishing
    • C25F3/02—Etching
    • C25F3/14—Etching locally
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F3/00—Electrolytic etching or polishing
    • C25F3/16—Polishing
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F3/00—Electrolytic etching or polishing
    • C25F3/16—Polishing
    • C25F3/22—Polishing of heavy metals
    • C25F3/24—Polishing of heavy metals of iron or steel

Definitions

  • Components of any type made of metal, especially steel, are used in a wide variety of applications used. As far as the metal used is not due to suitable alloy components As a rule, different corrosion protection measures are used here intended. This includes coating brass surfaces with a clear coat.
  • a disadvantage of known methods of corrosion protection is that the metallic Shine that the component can have due to mechanical processing, corrosion protection layers such as paints, electroplated coatings, greases or the like, or tarnishing from Welding does not come to fruition.
  • a surface area of the metallic workpiece is electrostructured. This is done in areas a resist layer on the surface of the metallic workpiece that is not to be removed applied and removed after the respective process step for removal. As a result, surface sections with a raised are on the workpiece Structure created surrounded by electropolished and / or chemically polished areas are.
  • Figure 2 shows the sequence of a pretreatment of the workpiece 2 schematically as a flow chart.
  • Surface treatment of the workpiece or component 2 begins in the illustrated Embodiment with washing and degreasing 100.
  • washing and degreasing 100 As a result, in the area of Surface 3 applied for corrosion protection greases or oils as well as adhering dust and Dirt removed. This must be done completely, otherwise the electrochemical / chemical Removal of the surface 3 may be incomplete.
  • washing / degreasing 100 known methods are available (see, for example, Rituper, R .: pickling of Metallen, Eugen G. Leuze Verlag, Bad Saulgau, 1993). This makes it possible even for existing ones Plants for processing metallic workpieces in the process described here to integrate.
  • the pretreatment also includes electrolytic pickling 150.
  • the workpiece 2 is removed anodically in an electrolyte, ie the workpiece 2 is connected to a positive pole of a direct current source (external current source - not shown).
  • Effective-pair cathodes are used.
  • stainless steel can be used for steel.
  • Electrolytic pickling 150 in the later electropolishing electrolyte has proven to be particularly advantageous. If this is done, subsequent rinsing 160 and drying 170 can be dispensed with, which makes sense from an environmental and cost point of view.
  • Aqueous electrolytes composed of 15-70% by weight sulfuric acid and 30-80% by weight phosphoric acid with additions of up to 50% alcohols and further additions of surface-active substances are preferably used for steel. It is expedient to set the electrolyte temperature at which the best possible gloss properties are achieved (40-90 ° C).
  • the constant current density is chosen so that there is a uniform removal. For example, it is between 15 and 150 A / dm 2 .
  • the processing time is between 1 and 60 minutes, depending on the workpiece. It is chosen so that hydrodynamic structure formation, as is known from electropolishing, occurs as far as possible.
  • rinsing 190 for example in a cascade rinsing, and drying 200 in the oven or by means of compressed air. This is essential, provided that the rinsing 190 has been carried out, and must be carried out in such a way that no residues of water remain on the surface 3, which reduce the adhesion of a paint to be applied later.
  • the high-gloss surface 3 thus obtained is by means of Rinsing and drying 190, 200 cleaned of the adhering electrolyte and for the following Paint 220 prepared.
  • the application of the adhesion promoter 210 can be provided his.
  • the lacquer is baked and dried 230, if this is the one used Paint is necessary. If the paint is baked 230, which is the case, for example a powder coating is provided, a cooling phase 240 follows.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP03014048A 2003-01-30 2003-06-23 Procédé d'usinage d'une pièce métallique Withdrawn EP1443129A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10303842 2003-01-30
DE10303842 2003-01-30
DE20304642 2003-03-21
DE20304642U 2003-03-21

Publications (1)

Publication Number Publication Date
EP1443129A1 true EP1443129A1 (fr) 2004-08-04

Family

ID=32657777

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03014048A Withdrawn EP1443129A1 (fr) 2003-01-30 2003-06-23 Procédé d'usinage d'une pièce métallique

Country Status (1)

Country Link
EP (1) EP1443129A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007017156A1 (fr) * 2005-08-09 2007-02-15 Poligrat Gmbh Procede d'electropolissage
WO2007056992A1 (fr) * 2005-11-21 2007-05-24 Eric Blauenstein Procede et moyen de nettoyage electrolytique et de decalaminage d'une piece metallique
DE102013005880A1 (de) 2013-04-06 2014-03-27 Daimler Ag Werkzeug und zugehöriges Herstellungsverfahren
EP2871267A1 (fr) * 2013-11-08 2015-05-13 LG Electronics Inc. Panneau de décoration extérieure pour appareil ménager et procédé de fabrication de celui-ci

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2689785A (en) * 1953-03-18 1954-09-21 Us Navy Method for chemically polishing lead
US2773821A (en) * 1956-06-12 1956-12-11 Electro Gleam Inc Composition for use in electropolishing
GB1179623A (en) * 1967-03-10 1970-01-28 Albright & Wilson Mfg Ltd Electrolytic Metal Finishing
DE1796059A1 (de) * 1968-08-23 1972-08-31 Helling Werner Dr Ing Verfahren zur Vorbereitung von Stahl und Aluminium fuer eine Lackierung oder Beschichtung mit Kunststoffen durch eine Nasspolitur
JPS61119680A (ja) * 1984-11-15 1986-06-06 Toshinori Kawabuchi 金属製外装板およびその製造方法
DE19528835A1 (de) * 1995-08-05 1997-02-06 Wetzel Gmbh Verfahren zur Herstellung einer Sollkontur eines Werkstücks

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2689785A (en) * 1953-03-18 1954-09-21 Us Navy Method for chemically polishing lead
US2773821A (en) * 1956-06-12 1956-12-11 Electro Gleam Inc Composition for use in electropolishing
GB1179623A (en) * 1967-03-10 1970-01-28 Albright & Wilson Mfg Ltd Electrolytic Metal Finishing
DE1796059A1 (de) * 1968-08-23 1972-08-31 Helling Werner Dr Ing Verfahren zur Vorbereitung von Stahl und Aluminium fuer eine Lackierung oder Beschichtung mit Kunststoffen durch eine Nasspolitur
JPS61119680A (ja) * 1984-11-15 1986-06-06 Toshinori Kawabuchi 金属製外装板およびその製造方法
DE19528835A1 (de) * 1995-08-05 1997-02-06 Wetzel Gmbh Verfahren zur Herstellung einer Sollkontur eines Werkstücks

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 010, no. 310 (C - 379) 22 October 1986 (1986-10-22) *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007017156A1 (fr) * 2005-08-09 2007-02-15 Poligrat Gmbh Procede d'electropolissage
WO2007056992A1 (fr) * 2005-11-21 2007-05-24 Eric Blauenstein Procede et moyen de nettoyage electrolytique et de decalaminage d'une piece metallique
DE102013005880A1 (de) 2013-04-06 2014-03-27 Daimler Ag Werkzeug und zugehöriges Herstellungsverfahren
EP2871267A1 (fr) * 2013-11-08 2015-05-13 LG Electronics Inc. Panneau de décoration extérieure pour appareil ménager et procédé de fabrication de celui-ci
US20150132598A1 (en) * 2013-11-08 2015-05-14 Lg Electronics Inc. Exterior décor panel for home appliance and method of manufacturing the same
KR20150053473A (ko) * 2013-11-08 2015-05-18 엘지전자 주식회사 가전기기용 외장 패널 및 그 제조방법
CN104630873A (zh) * 2013-11-08 2015-05-20 Lg电子株式会社 家用电器的外部装饰面板及其制造的方法
US9746765B2 (en) 2013-11-08 2017-08-29 Lg Electronics Inc. Exterior décor panel for home appliance and method of manufacturing the same

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