EP0810297A1 - Corrosion-resistant parts for chain - Google Patents

Corrosion-resistant parts for chain Download PDF

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Publication number
EP0810297A1
EP0810297A1 EP97105973A EP97105973A EP0810297A1 EP 0810297 A1 EP0810297 A1 EP 0810297A1 EP 97105973 A EP97105973 A EP 97105973A EP 97105973 A EP97105973 A EP 97105973A EP 0810297 A1 EP0810297 A1 EP 0810297A1
Authority
EP
European Patent Office
Prior art keywords
chain
zinc coating
zinc
coating
corrosion
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.)
Ceased
Application number
EP97105973A
Other languages
German (de)
English (en)
French (fr)
Inventor
Tetsuya Murano
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.)
Tsubakimoto Chain Co
Original Assignee
Tsubakimoto Chain Co
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 Tsubakimoto Chain Co filed Critical Tsubakimoto Chain Co
Publication of EP0810297A1 publication Critical patent/EP0810297A1/en
Ceased legal-status Critical Current

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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
    • C23C28/00—Coating 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
    • 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
    • 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
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/26—After-treatment

Definitions

  • the present invention relates to parts for a driving chain or a conveyor chain which are used in a corrosive atmosphere such as, for example, an atmosphere containing salt water, acid, or alkali.
  • Zinc coating and nickel coating are usually adopted as means for preventing the corrosion of chains and sprockets.
  • the corrosion preventing means using zinc coating is applied to a component of a chain, the component will undergo hydrogen brittleness because hydrogen, which is generated in picking or plating for the formation of a galvanized film, penetrates into the metal texture of the component, with the result that the mechanical strength of the component after hardening is markedly deteriorated. Also at the time of forming a chromate film on the galvanized film there arises the problem of hydrogen brittleness of the chain component which is attributable to the acid contained in the treating solution.
  • the chromate film is in the form of a gelled hydrate, which is softer than metals, the film will be destroyed in an early stage if the part coated with the film is a component of a chain subjected to the action of a shear stress and a tensile stress repeatedly. Also when a pin is press-fitted into outer plates of a chain or when a bushing is press-fitted into inner plates of the chain, the chromate film is often destroyed. As a result, the galvanized film loses its corrosion preventing property due to white rust and eventually the component of the chain is corroded by red rust.
  • the corrosion preventing means using nickel plating is applied to a component of a chain, the problem of hydrogen brittleness will become less serious than in the use of zinc plating, but since nickel plating is inferior in point of corrosion preventing performance, the iron base of the chain component will be easily corroded by red rust through pin-holes of the nickel plated film.
  • a corrosion-resistant part for a chain which is obtained by forming a zinc coating on an iron base of the part for a chain in a hydrogen-free atmosphere and then forming a baked film for the prevention of white rust on said zinc coating.
  • the zinc coating is formed for preventing corrosion of the iron base.
  • the zinc coating is formed in a hydrogen-free atmosphere to obviate the problem of hydrogen brittleness with respect to the iron base of a part for a chain and thereby ensure the mechanical strength required of the part for a chain.
  • a white rust preventing baked film is formed on the zinc coating to prevent the formation of zinc oxide on the surface of the part for a chain.
  • the zinc coating is formed, for example, by dipping in molten zinc, painting, spray coating, or mechanical plating. By adopting any of these means it is possible to form the zinc coating in a hydrogen-free atmosphere without the generation of hydrogen.
  • the baked film for the prevention of white rust is formed by painting and baking with use of a coating material which contains aluminum powder and a silicone resin.
  • a coating material which contains aluminum powder and a silicone resin.
  • the aluminum which is contained in the baked film and which exhibits a greater ionization tendency than zinc and iron, protects both zinc coating and iron base.
  • the silicon resin also contained in the baked film imparts a strong toughness to the same film and is superior in both heat resistance and weathering resistance. Further, the silicon resin functions to reduce a press-fitting load in assembling zinc- coated parts into a chain, for example, by press-fitting, thereby preventing damage to the zinc coating.
  • the present invention is applied, for example, to such chain constituent parts as shown in Fig. 1 and a sprocket on which the chain is to be entrained.
  • the chain indicated by the reference numeral 10, has outer plates 12, inner plates 14, a pm 16 press-fitted into the outer plates 12, a bushing 18 press- fitted into the inner plates 14, and a roller 20 disposed in surrounding relation to the bushing 18.
  • the outer plate 12 and the inner plate 14 come into sliding contact with each other at a high surface pressure, and so do the pin 16 and the bushing 18, and the bushing and the roller 20.
  • the chain components with the invention applied thereto can be kept corrosion-proof even under such a working condition.
  • zinc coating 24 is formed on an iron base 22 of the outer plate 12 in a hydrogen-free atmosphere, and a baked film 26 for the prevention of white rust is formed thereon.
  • the zinc coating is formed, for example, by dipping in molten zinc, painting, spray coating, or mechanical plating.
  • forming the zinc coating with any of such means it is possible to obviate the problem of hydrogen brittleness of the so-coated chain component and prevent deterioration in mechanical strength thereof.
  • the chain component treated according to the present invention is useful particularly in a working condition in which the chain component undergoes a shear stress and a tensile stress repeatedly.
  • a baked film for the prevention of white rust is formed on the zinc coating.
  • This baked film is formed by painting and baking with use of a coating material which contains 10 ⁇ 40% by weight of aluminum powder and 3 ⁇ 40% by weight of a silicone resin.
  • the aluminum powder Since the aluminum powder exhibits a greater ionization tendency than zinc and iron, it functions to protect the zinc coating and iron base even in the event the zinc coating is flawed. If the content of the aluminum powder is less than 10% by weight, the corrosion-proof effect of protecting the zinc coating by virtue of the ionization tendency of the aluminum powder will be deteriorated markedly. And if the content of the aluminum powder exceeds 40% by weight, the adhesiveness of the baked film to the zinc coating becomes extremely low.
  • the silicone resin imparts a strong toughness to the white rust preventing baked film and is superior in both heat resistance and weathering resistance. Further, the silicone resin functions to diminish a press-fitting load in assembling zinc-coated parts into a chain, for example, by press-fitting, thereby preventing damage to the zinc coating. If the content of the silicone resin is less than 3% by weight, the flaw and crack preventing effect against external forces will be greatly deteriorated. And a silicone resin content exceeding 40% by weight will result in marked deterioration in adhesiveness of the baked film to the zinc coating.
  • the coating material for forming the white rust preventing baked film comprises 35 wt% of aluminum powder, 35 wt% of a silicone resin, 16 wt% of an alkyd resin, 7 wt% of an aromatic solvent, 5 wt% of an ester type solvent, and 2 wt% of an additive.
  • pins, bushings, rollers and plates, as chain components were galvanized and coated with chromate film, then assembled into a chain.
  • a zinc coating and a baked film for the prevention of white rust were formed in this order on each of pins, bushings, rollers and plates as chain components, which were then assembled into a chain.
  • a salt spray test defined by JIS 2371 was conducted to check the corrosion preventing effect for the chain components treated by the present invention.
  • a zinc coating is formed on a part for a chain in a hydrogen-free atmosphere, whereby it is possible to obtain a corrosion-proof zinc coating without hydrogen brittleness of the part for a chain.
  • a chain superior in both mechanical strength and corrosion resistance since the baked film for the prevention of white rust is formed directly on the zinc coating, the formation of zinc oxide on the zinc coating is prevented and the problem of white rust peculiar to zinc coating is solved.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Coating With Molten Metal (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Paints Or Removers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP97105973A 1996-05-31 1997-04-11 Corrosion-resistant parts for chain Ceased EP0810297A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP138592/96 1996-05-31
JP08138592A JP3122037B2 (ja) 1996-05-31 1996-05-31 防食性チェーン用部品

Publications (1)

Publication Number Publication Date
EP0810297A1 true EP0810297A1 (en) 1997-12-03

Family

ID=15225708

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97105973A Ceased EP0810297A1 (en) 1996-05-31 1997-04-11 Corrosion-resistant parts for chain

Country Status (2)

Country Link
EP (1) EP0810297A1 (ja)
JP (1) JP3122037B2 (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1091021A1 (en) * 1999-10-04 2001-04-11 General Electric Company Method for forming a coating by use of foam technique
EP1850031A1 (en) * 2006-04-27 2007-10-31 Tsubakimoto Chain Co. Corrosion resistant roller chain
US20110281992A1 (en) * 2009-01-30 2011-11-17 Yuji Fukuike Top coat paint, corrosion resistant surface-treated chain and corrosion resistant surface-treated sprocket
US8415026B2 (en) 2006-09-06 2013-04-09 Tsubakimoto Chain Co. Water-based rust preventive pigment, water-based rust preventive paint, and highly corrosion resistant surface-treated chain

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4234038B2 (ja) * 2004-03-03 2009-03-04 株式会社椿本チエイン 防食性チェーン
JP5871990B2 (ja) 2014-04-25 2016-03-01 株式会社椿本チエイン チェーン
JP7114914B2 (ja) * 2018-01-29 2022-08-09 株式会社東郷製作所 防錆処理された金属部材およびコート塗料

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1243304A (en) * 1968-05-13 1971-08-18 Jones & Laughlin Steel Corp Metallic substrates having organic coatings
JPS5562173A (en) * 1978-10-31 1980-05-10 Nippon Steel Corp Preventing method for formation of zinc white rust on zinc-plated steel sheet
GB2041241A (en) * 1979-02-02 1980-09-10 Nisshin Steel Co Ltd Zinc plated steel plate and can produced from the same
JPS57162671A (en) * 1981-03-31 1982-10-06 Matsushita Electric Works Ltd Corrosion resistant fused zinc plating method
JPS58210883A (ja) * 1982-06-01 1983-12-08 Sekisui Jushi Co Ltd 鉄系金属表面の防蝕方法
JPS60208480A (ja) * 1984-03-30 1985-10-21 Sumitomo Metal Ind Ltd 表面処理めつき鋼板
JPS63293172A (ja) * 1987-05-26 1988-11-30 Zojirushi Chain Block Kk 耐蝕性，耐摩耗性および潤滑特性等に優れた鋼製チエンの製造方法
JPS63297613A (ja) * 1987-05-28 1988-12-05 株式会社神戸製鋼所 吊橋用ケ−ブルワイヤ
EP0313447A1 (fr) * 1987-10-22 1989-04-26 PRODUITS CHIMIQUES AUXILIAIRES ET DE SYNTHESE (P.C.A.S.) Société anonyme dite: Composition pour la protection superficielle du zinc contre la "rouille blanche" et procédés correspondants
WO1995000680A1 (en) * 1993-06-25 1995-01-05 Henkel Corporation Composition and process for treating a zinciferous surface

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1243304A (en) * 1968-05-13 1971-08-18 Jones & Laughlin Steel Corp Metallic substrates having organic coatings
JPS5562173A (en) * 1978-10-31 1980-05-10 Nippon Steel Corp Preventing method for formation of zinc white rust on zinc-plated steel sheet
GB2041241A (en) * 1979-02-02 1980-09-10 Nisshin Steel Co Ltd Zinc plated steel plate and can produced from the same
JPS57162671A (en) * 1981-03-31 1982-10-06 Matsushita Electric Works Ltd Corrosion resistant fused zinc plating method
JPS58210883A (ja) * 1982-06-01 1983-12-08 Sekisui Jushi Co Ltd 鉄系金属表面の防蝕方法
JPS60208480A (ja) * 1984-03-30 1985-10-21 Sumitomo Metal Ind Ltd 表面処理めつき鋼板
JPS63293172A (ja) * 1987-05-26 1988-11-30 Zojirushi Chain Block Kk 耐蝕性，耐摩耗性および潤滑特性等に優れた鋼製チエンの製造方法
JPS63297613A (ja) * 1987-05-28 1988-12-05 株式会社神戸製鋼所 吊橋用ケ−ブルワイヤ
EP0313447A1 (fr) * 1987-10-22 1989-04-26 PRODUITS CHIMIQUES AUXILIAIRES ET DE SYNTHESE (P.C.A.S.) Société anonyme dite: Composition pour la protection superficielle du zinc contre la "rouille blanche" et procédés correspondants
WO1995000680A1 (en) * 1993-06-25 1995-01-05 Henkel Corporation Composition and process for treating a zinciferous surface

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Derwent World Patents Index; AN 89-020791 c03, XP002040445 *
PATENT ABSTRACTS OF JAPAN vol. 004, no. 101 (C - 019) 19 July 1980 (1980-07-19) *
PATENT ABSTRACTS OF JAPAN vol. 007, no. 003 (C - 143) 7 January 1983 (1983-01-07) *
PATENT ABSTRACTS OF JAPAN vol. 008, no. 056 (C - 214) 14 March 1984 (1984-03-14) *
PATENT ABSTRACTS OF JAPAN vol. 010, no. 071 (C - 334) 20 March 1986 (1986-03-20) *
PATENT ABSTRACTS OF JAPAN vol. 013, no. 119 (C - 579) 23 March 1989 (1989-03-23) *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1091021A1 (en) * 1999-10-04 2001-04-11 General Electric Company Method for forming a coating by use of foam technique
US6511630B1 (en) 1999-10-04 2003-01-28 General Electric Company Method for forming a coating by use of foam technique
EP1850031A1 (en) * 2006-04-27 2007-10-31 Tsubakimoto Chain Co. Corrosion resistant roller chain
US8415026B2 (en) 2006-09-06 2013-04-09 Tsubakimoto Chain Co. Water-based rust preventive pigment, water-based rust preventive paint, and highly corrosion resistant surface-treated chain
US20110281992A1 (en) * 2009-01-30 2011-11-17 Yuji Fukuike Top coat paint, corrosion resistant surface-treated chain and corrosion resistant surface-treated sprocket
CN102300943B (zh) * 2009-01-30 2013-12-04 株式会社椿本链条 面饰层涂料、防蚀表面处理链条及防蚀表面处理链轮
TWI418600B (zh) * 2009-01-30 2013-12-11 Tsubakimoto Chain Co 上層塗覆用之塗料、有防蝕表面處理之鏈條，及有防蝕表面處理之鏈輪
US8703857B2 (en) 2009-01-30 2014-04-22 Tsubakimoto Chain Co. Top coat paint, corrosion resistant surface-treated chain and corrosion resistant surface-treated sprocket

Also Published As

Publication number Publication date
JP3122037B2 (ja) 2001-01-09
JPH09317832A (ja) 1997-12-12

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