EP1722007A1 - Pièce avec une liaison de méteaux differents et une bonne resistance à la corrosion et procédé de fabrication d'un tel pièce - Google Patents

Pièce avec une liaison de méteaux differents et une bonne resistance à la corrosion et procédé de fabrication d'un tel pièce Download PDF

Info

Publication number
EP1722007A1
EP1722007A1 EP05010354A EP05010354A EP1722007A1 EP 1722007 A1 EP1722007 A1 EP 1722007A1 EP 05010354 A EP05010354 A EP 05010354A EP 05010354 A EP05010354 A EP 05010354A EP 1722007 A1 EP1722007 A1 EP 1722007A1
Authority
EP
European Patent Office
Prior art keywords
ions
joint member
zinc
aluminium
dissimilar metal
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
EP05010354A
Other languages
German (de)
English (en)
Other versions
EP1722007B1 (fr
Inventor
Hidekazu Kobe Corporate Research Lab. Ido
Mikako Kobe Corporate Research Lab. Takeda
Wataru Kobe Corporate Research Lab. Urushihara
Jun Kobe Corporate Research Lab. Katoh
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.)
Kobe Steel Ltd
Original Assignee
Kobe Steel Ltd
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 Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to DE200560009665 priority Critical patent/DE602005009665D1/de
Priority to EP20050010354 priority patent/EP1722007B1/fr
Publication of EP1722007A1 publication Critical patent/EP1722007A1/fr
Application granted granted Critical
Publication of EP1722007B1 publication Critical patent/EP1722007B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/54—Contact plating, i.e. electroless electrochemical plating
    • 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
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/78—Pretreatment of the material to be coated

Definitions

  • This invention relates to a member having an excellent bimetallic corrosion resistance used at an aluminium-copper dissimilar metal joint portion employed such as in automobiles and the like.
  • Such bimetallic corrosion as mentioned above occurs in such a way that a potential difference is caused between the metals due to the difference in ionization tendency therebetween, thereby causing a corrosion current to pass.
  • the following counter measures are conventionally known.
  • a metal indicating a less noble potential and a metal indicating a more noble potential are brought into contact with each other, a metal exhibiting an intermediate potential is sprayed onto a metal side indicating the less noble potential.
  • the metal spraying may be effected on either of the less noble and more noble metals or both thereof. In this way, the potential difference between both metals can be lessened, thus enabling one to reduce electrolytic corrosion of the metal of the less noble potential.
  • a paint having selective anion transmission action is undercoated on a surface of a metal, selected from two types of metals in contact with each other in an aqueous solution, on which an anode is formed. Thereafter, a paint having selective cation transmission action may be overcoated, or a cationic exchange film may be bonded with the undercoating paint to cover the undercoating therewith.
  • an ionic exchange composite film may be bonded by means of an undercoating paint as used above such that a pain having cation transmission action is undercoated on a metal surface where a cathode is formed and another type of paint having selective anion transmission action is overcoated, or ionic electrophoresis between metals may be interrupted by other technique to prevent bimetallic corrosion.
  • Terminals are attached to different types of metal materials, between which a DC voltage is applied so as to prevent the metal materials from being ionized, thereby inhibiting the occurrence of electrolytic corrosion.
  • a conductive paint containing a large amount of a metal which is less noble than aluminium is applied onto metal surfaces of a relay box and an anchor housing.
  • a counterpart metal material of dissimilar metal materials contacting with each other such as a Zn alloy, Fe, Al or the like, i.e. a less-noble metal material, is reduced in corrosion weight loss.
  • a different type of metal is plated on both sides of a sheet made of a metal having an ionization tendency larger than iron to provide an anticorrosive sheet which has a natural electrode potential difference from a steel sheet at 0 to -'300 mV.
  • This anticorrosive sheet is sandwiched between two jointing sheets of steel thereby forming an anticorrosive layer.
  • a method of preventing stress corrosion with the aluminium alloy casting is provided. More particularly, this method is to prevent stress corrosion of the aluminium alloy casting by interposing, at least a part of an area of contact between the casting and the steel member, a metal member or metal layer which is less noble by 100 mV vs SCE or over or is more noble by -1500 mV vs SCE in terms of mixed potential than the natural potential of the casting.
  • metallic zinc is caused to exist, as deposited, in the vicinity of a jointed portion of an iron material that is electrochemically more noble than aluminium, and aluminium or an aluminium alloy material, so that a resistance to bimetallic corrosion can be reliably improved.
  • Fig. 1 is a schematic view showing a deposited state of metallic zinc and a mechanism of suppressing corrosion in the vicinity of a joint portion (i.e. a joint-affecting portion) of an aluminium-iron joint member according to the invention.
  • Fig. 2 is a schematic view showing a mechanism of promoting corrosion in the vicinity of a joint portion (i.e. joint-affecting portion) of an aluminium-iron joint member.
  • aluminium material or merely as aluminium aluminium
  • iron material or merely as iron iron
  • aluminium (Al) that is a metal less noble than iron (Fe) is converted to Al 3+ ions and dissolved out, thereby promoting corrosion. This is because a corrosion current flows between both materials due to a great potential difference between aluminium and iron.
  • the potential difference between both materials is used to cause the following reaction 2Al + 3Zn 2+ ⁇ 2Al 3+ + 3Zn to proceed at a site or portion which suffers an influence of potential difference resulting from dissimilar metal joint in the vicinity of the joint portion.
  • metallic zinc can be deposited on and attached to the surface of the iron at this site, thereby causing the zinc to exist thereat.
  • This zinc is formed by deposition, and thus, can be reliably and satisfactorily attached to the iron surface in the vicinity of the joint portion even if the joint portion is very narrow.
  • the deposited layer of iron is dense and high in adhesion and is thus unlikely to disappear through peeling-off or breakage and can be held as attached over a long time. As a consequence, the influence of potential difference is mitigated, thereby ensuring effective suppression of corrosion.
  • fluoro complex ions are able to dissolve an oxide film on an aluminium surface and thus, serve to cause the above reaction to proceed smoothly.
  • the salts containing fluoro complex ions include, for example, a hexafluorosilicate, tetrafluoroborate, hexafluorophosphate, and fluorosulfate.
  • a hexafluorosilicate or a tetrafluoroborate In view of the stability and reactivity, it is preferred to use a hexafluorosilicate or a tetrafluoroborate.
  • the treating time should preferably be within a range of 30 seconds to 3 minutes from the standpoint of ensuring corrosion resistance of joint member and productivity.
  • the treating time is preferably not lower than 40°C in view of the reactivity and the ease in temperature control and not higher than 80°C in view of suppressing evaporation of treating solution.
  • joint member means a portion interposed between members in ordinary cases, for which that portion cannot be treated by other methods such as electroplating, metal spraying and the like.
  • the invention is more particularly described by way of example.
  • a mild steel plate (30 ⁇ 100 ⁇ 0.8 mm) and each of aluminium plates (6022 and 5023 with a dimension of 30 ⁇ 100 ⁇ 0.8 mm) were spot welded under conditions of 12 kV and 200 ms.
  • Treating procedure treating in the order of (a) degreasing ⁇ (b) rinsing with water ⁇ (c) surface adjustment ⁇ (d) chemical conversion (dipping) ⁇ (e) drying after chemical conversion ⁇ (f) rinsing with water ⁇ (g) rinsing with pure water ⁇ (h) drying by drainage ⁇ (i) painting.
  • a cationic electrodeposition paint (commercially available from Nippon Paint Co., Ltd., with a commercial name of "Power Top V50 Gray”) was pained by cationic electrodeposition painting and baked at a temperature of 170°C for 25 minutes to form a 30 ⁇ m thick pain film.
  • Test pieces made in (1) to (4) above were subjected to a composite corrosion test to evaluate bimetallic corrosion resistance.
  • the corrosion test was conducted by repeating 100 times a cycle test having each cycle of 2 hours salt spraying, 2 hours drying and 2 hours wetting. Thereafter, the joint portion was peeled off and observed to assess corrosion resistivity (a maximum depth of corrosion of A1).
  • the results of the assessment of the corrosion resistivity and chemical conversion are shown in Tale 1.
  • the corrosion resistivity was evaluated by measuring a maximum depth of corrosion of A1 (mm) and ranking according to the following three phases ⁇ : 0 to 0. 01 (mm), ⁇ : 0.01 to 0.1 (mm), and ⁇ : larger than 0.1 (mm) .
  • the chemical conversion was evaluated by measuring an amount of deposited film and ranking according to the following three phases: ⁇ :1 to 2 (g/m 2 ), ⁇ : 0.5 to 1 (g/m 2 ) and ⁇ : 0 to 0.5 (g/m 2 )

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrochemistry (AREA)
  • Prevention Of Electric Corrosion (AREA)
EP20050010354 2005-05-12 2005-05-12 Pièce avec une liaison de méteaux differents et une bonne resistance à la corrosion et procédé de fabrication d'un tel pièce Expired - Fee Related EP1722007B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE200560009665 DE602005009665D1 (de) 2005-05-12 2005-05-12 Bauteil mit Verbindung zwischen unterschiedlichen Metallen und guter Resistenz gegen Korrosion und Verfahren zur Herstellung
EP20050010354 EP1722007B1 (fr) 2005-05-12 2005-05-12 Pièce avec une liaison de méteaux differents et une bonne resistance à la corrosion et procédé de fabrication d'un tel pièce

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20050010354 EP1722007B1 (fr) 2005-05-12 2005-05-12 Pièce avec une liaison de méteaux differents et une bonne resistance à la corrosion et procédé de fabrication d'un tel pièce

Publications (2)

Publication Number Publication Date
EP1722007A1 true EP1722007A1 (fr) 2006-11-15
EP1722007B1 EP1722007B1 (fr) 2008-09-10

Family

ID=35004249

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20050010354 Expired - Fee Related EP1722007B1 (fr) 2005-05-12 2005-05-12 Pièce avec une liaison de méteaux differents et une bonne resistance à la corrosion et procédé de fabrication d'un tel pièce

Country Status (2)

Country Link
EP (1) EP1722007B1 (fr)
DE (1) DE602005009665D1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5739165A (en) * 1980-08-18 1982-03-04 Koji Fujimori Nonpower source plating method utilizing potential difference due to earthing
JP2002212753A (ja) * 2001-01-17 2002-07-31 Kobe Steel Ltd リン酸塩処理性に優れたアルミニウム合金材およびその製造方法
US20040016363A1 (en) * 2002-07-24 2004-01-29 Phelps Andrew W. Corrosion-inhibiting coating

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5739165A (en) * 1980-08-18 1982-03-04 Koji Fujimori Nonpower source plating method utilizing potential difference due to earthing
JP2002212753A (ja) * 2001-01-17 2002-07-31 Kobe Steel Ltd リン酸塩処理性に優れたアルミニウム合金材およびその製造方法
US20040016363A1 (en) * 2002-07-24 2004-01-29 Phelps Andrew W. Corrosion-inhibiting coating

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
CANON R: "PROTECTION DE L'ALUMINIUM CONTRE LA CORROSION GALVANIQUE", REV ALUM AUG-SEP 1977, no. 465, August 1977 (1977-08-01), pages 420 - 426, XP009055251 *
DATABASE WPI Section Ch Week 198215, Derwent World Patents Index; Class M11, AN 1982-29637E, XP002348921 *
PATENT ABSTRACTS OF JAPAN vol. 2002, no. 11 6 November 2002 (2002-11-06) *
REINHOLD B ET AL: "Beschichtungssysteme fur Verbindungselemente in Kontakt mit Leichtmetallen", WERKST KORROS; WERKSTOFFE UND KORROSION 1995 VCH VERLAGSGESELLSCHAF MBH, WEINHEIM, GERMANY, vol. 46, no. 11, 1995, pages 615 - 621, XP009055280 *

Also Published As

Publication number Publication date
EP1722007B1 (fr) 2008-09-10
DE602005009665D1 (de) 2008-10-23

Similar Documents

Publication Publication Date Title
KR101108312B1 (ko) 캔용 도금 강판 및 그 제조 방법
US3909209A (en) Method of treating aluminum and aluminum alloys and article produced thereby
EP0092342B1 (fr) Procédé de production d'une bande d'acier présentant une excellente aptitude à être recouverte par une couche de phosphate
JP2010242195A (ja) 異種金属接触腐食に対する防食性に優れた表面処理金属材及びその表面処理金属材を備えた異材接合体
KR100298799B1 (ko) 아연계 도금강판 및 그 제조방법
PL129065B1 (en) Method of manufacturing sheet metal for packaging containers,in particular canned food cans
CN107851811B (zh) 燃料电池用通电构件、燃料电池单元、燃料电池堆和燃料电池用通电构件的制造方法
EP1538709A1 (fr) Borne électrique dont la surface est constituée par un alliage étain / argent / cuivre
JP4365667B2 (ja) 耐食性に優れた異種金属接合部材及び製造方法
EP1722007B1 (fr) Pièce avec une liaison de méteaux differents et une bonne resistance à la corrosion et procédé de fabrication d'un tel pièce
EP0307929A1 (fr) Tôle d'acier revêtue pour une boîte
PL126929B1 (en) Method of coating surfaces of complex structure bearing sleeve
US20060261137A1 (en) Dissimilar metal joint member with good corrosion resistance and method for manufacturing same
CA2507806C (fr) Element a jointure de metaux de natures differentes avec bonne tenue a la corrosion, et methode de realisation
JP5669352B2 (ja) 異種金属接触腐食に対する防食性に優れた異材接合体
KR100695593B1 (ko) 내식성이 우수한 이종 금속 접합 부재 및 제조 방법
JPS5837192A (ja) 片面亜鉛系電気メッキ鋼板の非メッキ面の後処理方法
JP7327719B1 (ja) 表面処理鋼板およびその製造方法
JPH06116746A (ja) スポット溶接性、プレス成形性および化成処理性に優れた亜鉛系めっき鋼板およびその製造方法
JPS61163292A (ja) 片面電気めつき法
JP2665298B2 (ja) スポット溶接性に優れた表面処理アルミニウム板
JPH025839B2 (fr)
JP3224457B2 (ja) 高速シーム溶接性、耐食性、耐熱性および塗料密着性に優れた溶接缶用素材
JP2790717B2 (ja) 異種金属接合体の燐酸塩下地処理方法
JP2726144B2 (ja) 被覆性と密着性に優れた高耐食性Ｐｂ‐Ｓｎ合金めっきＣｒ含有鋼板の製造法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR LV MK YU

17P Request for examination filed

Effective date: 20070308

17Q First examination report despatched

Effective date: 20070511

AKX Designation fees paid

Designated state(s): DE FR GB IT

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 602005009665

Country of ref document: DE

Date of ref document: 20081023

Kind code of ref document: P

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20090611

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 12

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 13

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20190430

Year of fee payment: 15

Ref country code: IT

Payment date: 20190527

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20190410

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20190508

Year of fee payment: 15

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602005009665

Country of ref document: DE

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20200512

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200512

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200512