FR2783255A1 - CONTACT CORROSION INHIBITION ARRANGEMENT - Google Patents
CONTACT CORROSION INHIBITION ARRANGEMENT Download PDFInfo
- Publication number
- FR2783255A1 FR2783255A1 FR9910934A FR9910934A FR2783255A1 FR 2783255 A1 FR2783255 A1 FR 2783255A1 FR 9910934 A FR9910934 A FR 9910934A FR 9910934 A FR9910934 A FR 9910934A FR 2783255 A1 FR2783255 A1 FR 2783255A1
- Authority
- FR
- France
- Prior art keywords
- aluminum
- layer
- contact
- parts
- steel
- 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
Links
- 230000007797 corrosion Effects 0.000 title claims abstract description 14
- 238000005260 corrosion Methods 0.000 title claims abstract description 14
- 230000005764 inhibitory process Effects 0.000 title 1
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 23
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000010959 steel Substances 0.000 claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 14
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 7
- 239000000470 constituent Substances 0.000 claims description 7
- 239000011777 magnesium Substances 0.000 claims description 7
- 229910052749 magnesium Inorganic materials 0.000 claims description 7
- 230000003647 oxidation Effects 0.000 claims description 4
- 238000007254 oxidation reaction Methods 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 238000004040 coloring Methods 0.000 claims description 2
- 229910000861 Mg alloy Inorganic materials 0.000 abstract description 6
- 230000002401 inhibitory effect Effects 0.000 abstract 1
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- MEBNLBHILOYVPC-UHFFFAOYSA-N 3-bromo-2-ethylpyridine Chemical compound CCC1=NC=CC=C1Br MEBNLBHILOYVPC-UHFFFAOYSA-N 0.000 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 241000212342 Sium Species 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004532 chromating Methods 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- VQWFNAGFNGABOH-UHFFFAOYSA-K chromium(iii) hydroxide Chemical compound [OH-].[OH-].[OH-].[Cr+3] VQWFNAGFNGABOH-UHFFFAOYSA-K 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B33/00—Features common to bolt and nut
- F16B33/008—Corrosion preventing means
-
- 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
-
- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
-
- 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
- C23F15/00—Other methods of preventing corrosion or incrustation
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
-
- 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
- C25D3/42—Electroplating: Baths therefor from solutions of light metals
- C25D3/44—Aluminium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Prevention Of Electric Corrosion (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
Agencement d'inhibition de corrosion par contact entre des pièces en acier (3) et un alliage de magnésium, dans lequel les deux parties en contact sont séparées l'une de l'autre par une couche électrochimiquement isolante d'aluminium.Selon l'invention la pièce d'acier (3) est prévue au moins en partie avec une couche d'aluminium déposée par galvanisation.Arrangement for inhibiting corrosion by contact between steel parts (3) and a magnesium alloy, in which the two parts in contact are separated from each other by an electrochemically insulating layer of aluminum. invention the piece of steel (3) is provided at least in part with a layer of aluminum deposited by galvanization.
Description
Domaine d'application de l'inventionScope of the invention
L'invention concerne un agencement servant à em- The invention relates to an arrangement for
pêcher la corrosion par contacts entre des pièces constituti- prevent corrosion by contact between component parts
ves en acier et en un alliage de magnésium, les deux parties étant séparées de façon électrochimique l'une de l'autre par made of steel and a magnesium alloy, the two parts being separated electrochemically from each other by
une couche intermédiaire isolante en aluminium. an insulating intermediate layer of aluminum.
Arrière plan de l'invention Il est habituel dans la construction automobile de fabriquer les carters de boite de vitesse en un alliage de fonte et de magnésium en raison de ses bonnes propriétés techniques lors de la coulée et de son faible poids. Dans ce cas on rencontre toutefois l'inconvénient selon lequel aux endroits o les pièces constitutives en acier et en magnésium BACKGROUND OF THE INVENTION It is usual in automobile construction to manufacture the gearbox casings from an alloy of cast iron and magnesium because of its good technical properties during casting and its low weight. In this case, however, there is the disadvantage that at the places where the constituent parts of steel and magnesium
sont directement appliquées les unes sur les autres, en par- are applied directly to each other, in part
ticulier en atmosphère humide contenant du sel, comme cela se présente en hiver sur les routes qui ont été salées, il se produit des phénomènes de corrosion qui peuvent conduire à especially in a humid atmosphere containing salt, as occurs in winter on roads that have been salted, corrosion occurs which can lead to
une détérioration considérable de la matière à base de magné- considerable deterioration of the magnesium-based material
sium. Il est ainsi concevable par exemple, que dans le cas de parties du carter maintenues ensemble par des boulons en acier et réalisées en un alliage de magnésium, la surface sium. It is thus conceivable for example, that in the case of parts of the casing held together by steel bolts and made of a magnesium alloy, the surface
d'appui sur les têtes des boulons ou sur les écrous soit dé- on the bolt heads or on the nuts either
tériorée du fait d'une corrosion par contact en présence d'une atmosphère humide, agressive et qu'en conséquence le serrage des boulons et donc la liaison des parties du carter deteriorated due to contact corrosion in the presence of a humid, aggressive atmosphere and consequently tightening of the bolts and therefore the connection of the parts of the housing
se relâchent d'eux-mêmes.relax on their own.
La corrosion par contact entre des pièces consti- Corrosion by contact between parts
tutives en acier et des alliages de magnésium est évitée se- guardians of steel and magnesium alloys is avoided se-
lon l'état de la technique connu jusqu'à présent, en protégeant les pièces constitutives contre l'atteinte des agents humides agressifs. Ainsi par exemple on connaît déjà par le document DE-OS-23 61 282 une protection des boulons de liaison, qui maintiennent ensemble deux parties d'un carter, lon the state of the art known hitherto, by protecting the constituent parts against the attack of aggressive wet agents. Thus, for example, from document DE-OS-23 61 282, protection of the connecting bolts is already known, which together hold two parts of a casing,
par un capuchon d'étanchéité posé étroitement dessus. Ce ca- by a sealing cap placed tightly on it. This ca
puchon d'étanchéité empêche un électrolyte d'accéder, de sealing plug prevents an electrolyte from entering,
sorte qu'une corrosion par contact ne peut pas avoir lieu. so that contact corrosion cannot take place.
On connaît une autre conception de protection contre la corrosion par contact de pièces constitutives par le document DE-42 27 259-C1. Pour éviter une corrosion par contact lors de la fixation d'une roue en magnésium sur la Another design for protection against corrosion by contact of constituent parts is known from document DE-42 27 259-C1. To avoid contact corrosion when attaching a magnesium wheel to the
monture de roue d'un véhicule à moteur il est prévu un agen- wheel mount of a motor vehicle there is provided an
cement, dans lequel on insère dans la zone des alésages de fixation une rondelle d'écartement de forme annulaire en alu- minium. Avec une interposition de ce type d'une rondelle en aluminium entre la roue en magnésium et la monture de la roue en acier on évite de cette façon un contact direct entre le cement, in which an annular aluminum spacer ring is inserted in the area of the fixing bores. With an interposition of this type of an aluminum washer between the magnesium wheel and the steel wheel mount, this avoids direct contact between the
magnésium et l'acier. Dans le cas de cette solution on a tou- magnesium and steel. In the case of this solution we have all
tefois l'inconvénient que l'on doit fabriquer et manipuler However the disadvantage that we have to manufacture and handle
une pièce constitutive additionnelle en aluminium. an additional aluminum component.
Résumé de l'inventionSummary of the invention
L'invention a en conséquence pour objet de déve- The object of the invention is therefore to develop
lopper un agencement amélioré pour empêcher la corrosion par lopper an improved arrangement to prevent corrosion by
contact en interposant une couche d'aluminium. contact by interposing a layer of aluminum.
Selon l'invention on résout ce problème par le fait que la pièce constitutive en acier est pourvue au moins According to the invention, this problem is solved by the fact that the constituent steel part is provided with at least
en partie d'une couche d'aluminium déposée de façon galvani- partly of a layer of aluminum deposited in a galvanic way
que. Avec une couche intermédiaire de ce type on évite d'une than. With an intermediate layer of this type, a
manière avantageuse un contact direct entre l'acier et le ma- advantageously direct contact between steel and ma-
gnésium. On a en outre l'avantage qu'en mettant directement la couche d'aluminium sur la pièce constitutive en acier le gnesium. There is also the advantage that by putting the aluminum layer directly on the steel component part the
maniement de la couche intermédiaire en tant que pièce addi- handling of the intermediate layer as an addi-
tionnelle est superflu. Ceci se répercute fortement sur le tional is superfluous. This has a strong impact on the
processus de montage quant à sa simplification. assembly process as for its simplification.
Selon d'autres caractéristiques de l'invention: - la couche d'aluminium doit présenter une épaisseur de 5 à pm, - il est prévu que la couche d'aluminium doit être soumise à According to other characteristics of the invention: - the aluminum layer must have a thickness of 5 to pm, - it is intended that the aluminum layer must be subjected to
un traitement d'oxydation. Grâce à ce traitement d'oxyda- an oxidation treatment. Thanks to this oxidation treatment
tion on obtient un renforcement du film naturel d'oxyde de la surface de l'aluminium. Ceci a lieu d'une manière connue tion a natural oxide film on the surface of the aluminum is reinforced. This takes place in a known manner
soit par traitement chimique soit par traitement électro- either by chemical treatment or by electro-
chimique. Avec l'oxydation chimique, c'est-à-dire avec un traitement de plongée ou de pulvérisation d'aluminium dans chemical. With chemical oxidation, i.e. with a diving treatment or spraying of aluminum in
les solutions les plus différentes alcalines ou acides con- the most different alkaline or acidic solutions
tenant des agents d'oxydation, on peut réaliser les couches holding oxidizing agents, layers can be made
les plus différentes. Les procédés électrochimiques de pro- the most different. The electrochemical processes of pro-
duction de la couche d'alumine sont toutefois très impor- alumina layer, however, are very important
tants. La pièce constitutive garnie d'aluminium est dans ce cas branchée en tant qu'anode et mise d'une manière connue dans un électrolyte avec une électrode opposée en faisant passer une tension continue, l'oxygène qui se dégage à l'anode entrant en liaison avec la surface en aluminium dès le stade de son dégagement, aunts. The component part lined with aluminum is in this case connected as an anode and put in a known manner in an electrolyte with an opposite electrode by passing a DC voltage, the oxygen which is released at the anode entering bond with the aluminum surface from the stage of its release,
- il peut être aussi approprié de soumettre la couche d'alu- - it may also be appropriate to subject the aluminum layer
minium à un traitement de chromatation. Les couches qui se minimum to a chromating treatment. The layers that
forment dans ce cas consistent essentiellement en alumi- form in this case consist essentially of alumi-
nium, en hydroxyde de chrome, et en un faible pourcentage d'oxyde de chrome. Les couches ont une très forte adhérence et ne sont pas endommagées en cas de déformations, elles nium, chromium hydroxide, and a small percentage of chromium oxide. The layers have a very strong adhesion and are not damaged in the event of deformations, they
agissent en outre mieux comme isolant ainsi que comme pro- also act better as an insulator as well as a
tection contre la corrosion, - finalement la couche d'oxyde est soumise à un traitement corrosion protection, - finally the oxide layer is subjected to a treatment
colorant. Des couches d'oxydes fraîchement produites peu- dye. Layers of freshly produced oxides can-
vent être teintées d'une manière simple en les plongeant can be tinted in a simple way by immersing them
dans des solutions aqueuses de matières colorantes organi- in aqueous solutions of organic coloring matter
ques ou de sels minéraux, la coloration pouvant être réglée ques or mineral salts, the color can be adjusted
en fonction de l'application spéciale. depending on the special application.
Brève description du dessinBrief description of the drawing
La présente invention va être décrite ci-après plus en détail à partir d'exemples de réalisation représentés sur les dessins annexés sur lesquels: - la figure unique montre une coupe à travers un point de The present invention will be described below in more detail on the basis of exemplary embodiments shown in the appended drawings in which: - the single figure shows a section through a point of
liaison entre deux pièces constitutives. connection between two constituent parts.
Description détaillée du dessinDetailed description of the drawing
La partie supérieure d'un carter 1, réalisée en The upper part of a casing 1, made in
un alliage de magnésium, est pourvue d'un alésage 6, traver- a magnesium alloy, is provided with a bore 6,
sant, et est appliqué dans un plan 8 sur une partie du carter 2 réalisée également en un alliage de magnésium, qui présente and is applied in a plane 8 to a part of the casing 2 also made of a magnesium alloy, which has
un trou borgne 7. Les deux parties du carter 1 et 2 sont re- a blind hole 7. The two parts of the casing 1 and 2 are re-
liées à l'aide d'une vis de fixation 3, qui repose par sa tête cylindrique 4 dans un élargissement de l'alésage 6 sur une surface annulaire 9. Entre l'élargissement de l'alésage 6 linked by means of a fixing screw 3, which rests by its cylindrical head 4 in a widening of the bore 6 on an annular surface 9. Between the widening of the bore 6
et la tête cylindrique 4 de la vis de fixation 3 il est natu- and the cylindrical head 4 of the fixing screw 3 it is natural
rellement prévu une fente 5, que l'on peut remplir d'un élec- actually provided a slot 5, which can be filled with an elect
trolyte liquide selon les conditions déterminées de l'envi- liquid trolyte according to the determined environmental conditions
ronnement. Dans ce cas avec une vis de fixation 3 en acier on arrive à avoir une corrosion par contact, lors de laquelle la partie supérieure du carter 1 se dissout à l'endroit o elle est en contact avec la face frontale de la tête cylindrique 4 de la vis, c'est-à-dire sur la surface annulaire 9. La perte de matière qui en résulte a pour conséquence un espace libre entre la tête 4 de la vis et l'alésage élargi 6 de la partie supérieure 1 du carter, de sorte qu'il y ait plus de liaison solidaire entre la partie supérieure 1 du carter et la partie really. In this case with a steel fixing screw 3, contact corrosion occurs, during which the upper part of the casing 1 dissolves at the place where it is in contact with the front face of the cylindrical head 4 of the screw, that is to say on the annular surface 9. The resulting loss of material results in a free space between the head 4 of the screw and the enlarged bore 6 of the upper part 1 of the casing, so that there is more integral connection between the upper part 1 of the casing and the part
inférieure 2 du carter.bottom 2 of the housing.
La vis de fixation en acier 3 est alors selon The steel fixing screw 3 is then according to
l'invention pourvue d'une couche électrolytique d'aluminium. the invention provided with an electrolytic layer of aluminum.
Un électrolyte contient par exemple 267 g/l de chlorure d'aluminium sans eau, qui est dissout dans 188 g/l de bromure de pyridine éthylique. Après délayage avec du toluène on peut procéder à l'électrolyse à 20 à 30 C, avec un courant d'un ampère par décimètre carré, avec un rendement en courant de %. Si l'on utilise une vis de fixation 3, garnie de cette façon d'aluminium selon l'invention, pour relier les An electrolyte contains for example 267 g / l of aluminum chloride without water, which is dissolved in 188 g / l of ethyl pyridine bromide. After diluting with toluene, electrolysis can be carried out at 20 to 30 ° C., with a current of one ampere per square decimetre, with a current yield of%. If a fixing screw 3 is used, lined in this way with aluminum according to the invention, to connect the
deux parties du carter 1 et 2, il ne se produit pas de corro- two parts of the casing 1 and 2, there is no corrosion
sion par contact, même si du liquide électrolytique pénètre dans la fente 5 directement à l'endroit du contact entre la vis de fixation 3 et la partie 1 du carter, c'est-à-dire sur la surface annulaire 9, de telle sorte qu'un siège solide contact, even if electrolytic liquid enters the slot 5 directly at the point of contact between the fixing screw 3 and the part 1 of the casing, i.e. on the annular surface 9, so that that a solid seat
pour les deux parties du boîtier 1 et 2 est toujours réalisé. for the two parts of the housing 1 and 2 is always produced.
NOMENCLATURE DES REFERENCESNOMENCLATURE OF REFERENCES
1 Partie supérieure du carter 2 Partie inférieure du carter 3 Vis de fixation 4 Tête de vis cylindrique Fente 6 Alésage 7 Trou borgne 8 Plan 9 Surface annulaire 1 Upper part of the casing 2 Lower part of the casing 3 Fixing screw 4 Cylindrical screw head Slot 6 Bore 7 Blind hole 8 Plan 9 Annular surface
Claims (5)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19839722A DE19839722A1 (en) | 1998-09-01 | 1998-09-01 | Prevention of contact corrosion between components made of steel and a magnesium alloy involves covering the steel component partially with an aluminum layer applied by galvanization |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2783255A1 true FR2783255A1 (en) | 2000-03-17 |
| FR2783255B1 FR2783255B1 (en) | 2002-02-08 |
Family
ID=7879382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9910934A Expired - Fee Related FR2783255B1 (en) | 1998-09-01 | 1999-08-31 | CONTACT CORROSION INHIBITION ARRANGEMENT |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE19839722A1 (en) |
| FR (1) | FR2783255B1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004010762B4 (en) * | 2004-03-05 | 2006-06-29 | Daimlerchrysler Ag | composite component |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2105873A5 (en) * | 1970-09-23 | 1972-04-28 | Porsche Kg | |
| DE2207771A1 (en) * | 1972-02-18 | 1973-08-23 | Thurner Bayer Druckguss | Steel bushed magnesium wheel - with aluminium separation between the two materials |
| DE4005502A1 (en) * | 1990-02-21 | 1991-08-22 | Sheh Fung Screws Co Ltd | Electro coating screws to provide protective layer - by immersing and rotating in electrolyte containing aluminium |
| JPH05125567A (en) * | 1991-11-06 | 1993-05-21 | Nippon Light Metal Co Ltd | Joint structure having excellent corrosion resistance |
| DE4227259C1 (en) * | 1992-08-18 | 1994-03-24 | Stahlschmidt & Maiworm | Arrangement to avoid contact corrosion on magnesium wheels |
| EP0694420A2 (en) * | 1994-07-29 | 1996-01-31 | Adam Opel Ag | Light-alloy wheel |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4306484C1 (en) * | 1993-03-02 | 1994-04-07 | Stahlschmidt & Maiworm | Arrangement to reduce contact corrosion between magnesium@ and steel wheel mount - has aluminium@ ring fixed to wheel outer and aluminium plate covering whole hub contact surface |
-
1998
- 1998-09-01 DE DE19839722A patent/DE19839722A1/en not_active Ceased
-
1999
- 1999-08-31 FR FR9910934A patent/FR2783255B1/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2105873A5 (en) * | 1970-09-23 | 1972-04-28 | Porsche Kg | |
| DE2207771A1 (en) * | 1972-02-18 | 1973-08-23 | Thurner Bayer Druckguss | Steel bushed magnesium wheel - with aluminium separation between the two materials |
| DE4005502A1 (en) * | 1990-02-21 | 1991-08-22 | Sheh Fung Screws Co Ltd | Electro coating screws to provide protective layer - by immersing and rotating in electrolyte containing aluminium |
| JPH05125567A (en) * | 1991-11-06 | 1993-05-21 | Nippon Light Metal Co Ltd | Joint structure having excellent corrosion resistance |
| DE4227259C1 (en) * | 1992-08-18 | 1994-03-24 | Stahlschmidt & Maiworm | Arrangement to avoid contact corrosion on magnesium wheels |
| EP0694420A2 (en) * | 1994-07-29 | 1996-01-31 | Adam Opel Ag | Light-alloy wheel |
Non-Patent Citations (2)
| Title |
|---|
| KÖNIG F.: "Kontaktkorrosion an Aluminium/Stahl- und Magnesium/Stahl-Verbindungen", GALVANOTECHNIK., vol. 89, no. 7, - July 1998 (1998-07-01), EUGEN G.LEUZE VERLAG. SAULGAU/WURTT., DE, pages 2199 - 2209, XP002151143, ISSN: 0016-4232 * |
| PATENT ABSTRACTS OF JAPAN vol. 017, no. 492 (C - 1107) 7 September 1993 (1993-09-07) * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19839722A1 (en) | 2000-03-02 |
| FR2783255B1 (en) | 2002-02-08 |
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