DE102007002321B4 - Coil spring with corrosion protection - Google Patents
Coil spring with corrosion protection Download PDFInfo
- Publication number
- DE102007002321B4 DE102007002321B4 DE102007002321.0A DE102007002321A DE102007002321B4 DE 102007002321 B4 DE102007002321 B4 DE 102007002321B4 DE 102007002321 A DE102007002321 A DE 102007002321A DE 102007002321 B4 DE102007002321 B4 DE 102007002321B4
- Authority
- DE
- Germany
- Prior art keywords
- coating
- coil spring
- galvanic
- nickel
- microns
- 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.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
- C25D3/565—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of zinc
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
- C25D17/002—Cell separation, e.g. membranes, diaphragms
-
- 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
- C25D5/48—After-treatment of electroplated surfaces
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
Schraubenfeder aus metallischem Material mit einer Zugfestigkeit zwischen 1900 MPa und 2050 MPa für den Einbau in ein Kraftfahrzeug, wobei die Schraubenfeder mindestens eine Beschichtung für den Korrosionsschutz aufweist, dadurch gekennzeichnet, dass die Beschichtung als galvanischer Zink-Nickel-Überzug ausgebildet ist und zusätzlich auf den galvanischen Überzug eine Pulverlackierung aufgesintert ist.Coil spring made of metallic material with a tensile strength between 1900 MPa and 2050 MPa for installation in a motor vehicle, wherein the coil spring has at least one coating for corrosion protection, characterized in that the coating is formed as a galvanic zinc-nickel coating and in addition to the galvanic coating a powder coating is sintered on.
Description
Die vorliegende Erfindung betrifft eine Schraubenfeder für den Einbau in ein Kraftfahrzeug, gemäß dem Oberbegriff des Anspruchs 1.The present invention relates to a coil spring for installation in a motor vehicle, according to the preamble of claim 1.
Schraubenfedern für den Einsatz in einem Kraftfahrzeug sind bekannt. Derartige Schraubenfedern weisen als Standardoberflächenschutz Pulverlackierungen wie beispielsweise die Pulverlackierung gemäß Volkswagennorm TL 261 D auf. Diese Pulverbeschichtung bietet für Schraubenfedern einen Korrosionsschutz. Als problematisch hierbei erweist es sich, dass Federn in Kraftfahrzeugen extremen Belastungen ausgesetzt sind. Insbesondere bei Steinschlag können Beschädigungen der Beschichtung entstehen. Weiterhin kann im Abwälzbereich der Federn die Beschichtung unter Umständen sogar komplett abgerieben werden. Bei Beschädigungen der Pulverbeschichtung kann diese den Schutz vor Korrosion nicht mehr gewährleisten. Da es sich beispielsweise bei Schraubenfedern um hochfeste Bauteile mit Zugfestigkeiten zwischen 1000 MPa und 2400 MPa handelt, sind die Werkstoffe, aus denen das Bauteil besteht, grundsätzlich gegenüber Schwingungsriss- und Spannungsrisskorrosion empfindlich. Eine Beschädigung der Pulverbeschichtung kann somit zu einem vorzeitigen Bruch eines Bauteils führen, so dass dessen Lebensdauer verkürzt ist.Coil springs for use in a motor vehicle are known. Such coil springs have as standard surface protection powder coatings such as the powder coating according to Volkswagen standard TL 261 D. This powder coating offers corrosion protection for coil springs. As problematic here it turns out that springs in motor vehicles are exposed to extreme loads. In particular, in the case of rockfall, damage to the coating can occur. Furthermore, in the rolling area of the springs, the coating may even be rubbed off completely. Damage to the powder coating can no longer guarantee protection against corrosion. For example, as coil springs are high-strength components with tensile strengths between 1000 MPa and 2400 MPa, the materials that make up the component are generally sensitive to vibration cracking and stress corrosion cracking. Damage to the powder coating can thus lead to premature breakage of a component, so that its life is shortened.
Aus
Das der vorliegenden Erfindung zugrunde liegende Problem ist die Schaffung einer Schraubenfeder der eingangs genannten Art, die korrosionsbeständiger ist.The problem underlying the present invention is to provide a coil spring of the type mentioned, which is more corrosion resistant.
Die Aufgabe wird durch eine Schraubenfeder mit den in Anspruch 1 genannten Merkmalen gelöst. Die Unteransprüche betreffen bevorzugte Ausgestaltungen der Erfindung.The object is achieved by a coil spring with the features mentioned in claim 1. The subclaims relate to preferred embodiments of the invention.
Gemäß Anspruch 1 ist vorgesehen, dass die Beschichtung als galvanischer Zink-Nickel-Überzug ausgebildet ist und zusätzlich auf den galvanischen Überzug eine Pulverlackierung aufgesintert ist. Ein galvanischer Überzug bietet neben einem guten Korrosionsschutz auch einen hohen Schutz gegen mechanische Beanspruchungen wie beispielsweise Steinschlag oder Abrieb. Auch bei einer Beschädigung des galvanischen Überzugs bietet dieser immer noch einen gewissen kathodischen Korrosionsschutz.According to claim 1 it is provided that the coating is formed as a galvanic zinc-nickel coating and in addition a powder coating is sintered on the galvanic coating. A galvanic coating offers not only a good corrosion protection but also a high level of protection against mechanical stresses such as stone chipping or abrasion. Even if the galvanic coating is damaged, it still offers some cathodic protection against corrosion.
Der galvanische Überzug ist als Zink-Nickel-Überzug ausgebildet, wobei der Überzug zwischen 8 % und 18 % Nickel, insbesondere zwischen 12 % und 15 % Nickel enthält.The galvanic coating is formed as a zinc-nickel coating, wherein the coating between 8% and 18% nickel, in particular between 12% and 15% nickel.
Durch die Kombination des galvanischen Überzugs und der zusätzlichen Pulverlackierung wird ein vergleichsweise optimaler Korrosionsschutz und mechanischer Schutz des Bauteils gewährleistet. Es besteht dabei unter Umständen die Möglichkeit, ein beispielsweise als Feder ausgebildetes Bauteil höherfest auszulegen. Dadurch kann die Materialstärke und damit das Gewicht des Bauteils reduziert werden.The combination of the galvanic coating and the additional powder coating ensures a comparatively optimal corrosion protection and mechanical protection of the component. Under certain circumstances, it is possible to design a higher-strength component designed, for example, as a spring. As a result, the material thickness and thus the weight of the component can be reduced.
Im Nachfolgenden wird zur Verdeutlichung ein Beispiel der Erfindung beschrieben.In the following, an example of the invention will be described for clarity.
Beispiel 1:Example 1:
Eine für den Einsatz in einem Kraftfahrzeug vorgesehene Schraubenfeder aus einem hochfesten Material, das eine Zugfestigkeit zwischen 1900 MPa und 2050 MPa aufweist, wird mit einem galvanischen Zink-Nickel-Überzug versehen. Dieser Überzug wird mittels einer Membrantechnologie auf die Schraubenfeder aufgebracht. Der Zink-Nickel-Überzug weist einen Nickel-Anteil zwischen 12 % und 15 % sowie eine Schichtdicke zwischen 5 µm und 25 µm auf.An intended for use in a motor vehicle coil spring made of a high strength material, which has a tensile strength between 1900 MPa and 2050 MPa, is provided with a galvanic zinc-nickel coating. This coating is applied by means of a membrane technology on the coil spring. The zinc-nickel coating has a nickel content of between 12% and 15% and a layer thickness of between 5 μm and 25 μm.
Anschließend wird auf den Zink-Nickel-Überzug eine Pulverlackierung aufgesintert. Die Pulverlackierung ist eine handelsübliche Pulverlackierung gemäß Volkswagennorm TL 261D. Die Pulverlackierung weist eine Schichtdicke zwischen 50 µm und 150 µm auf.Subsequently, a powder coating is sintered on the zinc-nickel coating. The powder coating is a commercially available powder coating according to Volkswagen standard TL 261D. The powder coating has a layer thickness between 50 .mu.m and 150 .mu.m.
Dauerschwingversuche an dieser Schraubenfeder zeigen, dass deren Lebensdauer im Vergleich zu Federn mit üblichen Beschichtungen deutlich erhöht ist.Fatigue tests on this helical spring show that their service life is significantly increased compared to springs with conventional coatings.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007002321.0A DE102007002321B4 (en) | 2007-01-16 | 2007-01-16 | Coil spring with corrosion protection |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007002321.0A DE102007002321B4 (en) | 2007-01-16 | 2007-01-16 | Coil spring with corrosion protection |
Publications (2)
Publication Number | Publication Date |
---|---|
DE102007002321A1 DE102007002321A1 (en) | 2008-07-17 |
DE102007002321B4 true DE102007002321B4 (en) | 2018-07-05 |
Family
ID=39509893
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102007002321.0A Active DE102007002321B4 (en) | 2007-01-16 | 2007-01-16 | Coil spring with corrosion protection |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102007002321B4 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010021827A1 (en) * | 2010-05-28 | 2011-12-01 | Volkswagen Aktiengesellschaft | Producing corrosion protected metallic component, by applying galvanic coating e.g. zinc coating on portion of component, applying surface protection to portion or total component, and burning surface protection at temperature |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19920394A1 (en) | 1999-05-04 | 2000-11-16 | Hillebrand Walter Gmbh & Co Kg | Alloy coating of gray cast iron |
EP1300486A1 (en) * | 2001-10-02 | 2003-04-09 | Shipley Co. L.L.C. | Plating bath and method for depositing a metal layer on a substrate |
US20030066756A1 (en) * | 2001-10-04 | 2003-04-10 | Shipley Company, L.L.C. | Plating bath and method for depositing a metal layer on a substrate |
FR2839729A1 (en) | 2002-05-16 | 2003-11-21 | Univ Toulouse | Corrosion protection of a steel or aluminum alloy substrate involves coating with a single phase zinc alloy matrix containing dispersed particles selected according to desired tribological properties |
WO2003100136A2 (en) * | 2002-05-28 | 2003-12-04 | Walter Hillebrand Gmbh & Co. Galvanotechnik | Alkaline zinc-nickel bath with increased current efficiency |
WO2004108995A1 (en) * | 2003-06-03 | 2004-12-16 | Taskem Inc. | Zinc and zinc-alloy electroplating |
FR2864553A1 (en) * | 2003-12-31 | 2005-07-01 | Coventya | Apparatus for the deposition of zinc or zinc alloys using a porous separator to divide the electrolyte bath into cathodic and anodic compartments |
-
2007
- 2007-01-16 DE DE102007002321.0A patent/DE102007002321B4/en active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19920394A1 (en) | 1999-05-04 | 2000-11-16 | Hillebrand Walter Gmbh & Co Kg | Alloy coating of gray cast iron |
EP1300486A1 (en) * | 2001-10-02 | 2003-04-09 | Shipley Co. L.L.C. | Plating bath and method for depositing a metal layer on a substrate |
US20030066756A1 (en) * | 2001-10-04 | 2003-04-10 | Shipley Company, L.L.C. | Plating bath and method for depositing a metal layer on a substrate |
FR2839729A1 (en) | 2002-05-16 | 2003-11-21 | Univ Toulouse | Corrosion protection of a steel or aluminum alloy substrate involves coating with a single phase zinc alloy matrix containing dispersed particles selected according to desired tribological properties |
WO2003100136A2 (en) * | 2002-05-28 | 2003-12-04 | Walter Hillebrand Gmbh & Co. Galvanotechnik | Alkaline zinc-nickel bath with increased current efficiency |
WO2004108995A1 (en) * | 2003-06-03 | 2004-12-16 | Taskem Inc. | Zinc and zinc-alloy electroplating |
FR2864553A1 (en) * | 2003-12-31 | 2005-07-01 | Coventya | Apparatus for the deposition of zinc or zinc alloys using a porous separator to divide the electrolyte bath into cathodic and anodic compartments |
Also Published As
Publication number | Publication date |
---|---|
DE102007002321A1 (en) | 2008-07-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE102015208978A1 (en) | Spring arrangement and method for producing a spring arrangement | |
DE102005050024B4 (en) | Spring plate, in particular for a vibration damper | |
DE202007019121U1 (en) | Coated lock washer | |
EP2260221A1 (en) | Multi-layer metal bellows and method for the production thereof | |
DE102007002321B4 (en) | Coil spring with corrosion protection | |
DE102011077735A1 (en) | Hinge bearing e.g. radial bearing, for use in water craft, has inner ring mounted relative to outer ring in sliding manner, made of plastic as basic material and including metallic coating, which forms sliding surface | |
DE102010002688A1 (en) | Helical compression spring for an oil scraper ring of a piston in an internal combustion engine and method for coating a helical compression spring | |
EP2095303B1 (en) | Transponder unit | |
DE102016220488A1 (en) | Injection molded plastic part | |
DE102011051674A1 (en) | Spring element made of a fiber composite material | |
DE102010015389A1 (en) | Spring wire, spring with it and manufacturing process for it | |
EP2576858B1 (en) | Piston ring or cylinder liner. | |
DE3825200C1 (en) | Process for coating plastic components with metals | |
DE102015002852A1 (en) | Fiber-reinforced motor vehicle vision component, motor vehicle and method for producing a motor vehicle | |
DE102018009263A1 (en) | Nanocontainer-containing coating for a body part, and body part with such a coating | |
DE202015007263U1 (en) | Motor vehicle chassis arrangement | |
DE102006019011A1 (en) | Wear-resistant air spring | |
DE102010021827A1 (en) | Producing corrosion protected metallic component, by applying galvanic coating e.g. zinc coating on portion of component, applying surface protection to portion or total component, and burning surface protection at temperature | |
DE102006029818B3 (en) | Guide rail and method for producing a guide rail | |
DE102019213865B4 (en) | Installation panel for a consumption value recording unit, method for its production, use of a layer as main coating and an oxide of an element of the carbon-silicon group, an alloy of an element of the carbon-silicon group or a compound with an element of the carbon-silicon group for producing a main coating | |
DE102022002321A1 (en) | Component arrangement with a spacer element | |
DE102010042741B4 (en) | Windscreen wiper device made of a plastic composite | |
DE102007062596A1 (en) | Spring device, particularly coil spring for chassis suspension of motor vehicle, has metallic spring body wounded up in turns, and coating is made up from elastomer, silicone or silicone-coating elastomer material | |
DE102016220621A1 (en) | Composite laminate for an aircraft or spacecraft | |
EP1464821A1 (en) | Piston for an internal combustion engine and method for producing the piston |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
OR8 | Request for search as to paragraph 43 lit. 1 sentence 1 patent law | ||
8127 | New person/name/address of the applicant |
Owner name: WALTER HILLEBRAND GMBH & CO. KG GALVANOTECHNIK, DE Owner name: VOLKSWAGEN AG, 38440 WOLFSBURG, DE |
|
R012 | Request for examination validly filed |
Effective date: 20131022 |
|
R016 | Response to examination communication | ||
R018 | Grant decision by examination section/examining division | ||
R020 | Patent grant now final |