EP1893462A1 - Method for the anticorrosive treatment of hollow bodies, method for producing a metallic structure treated according to said method, and method for maintaining the structure - Google Patents

Method for the anticorrosive treatment of hollow bodies, method for producing a metallic structure treated according to said method, and method for maintaining the structure

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Publication number
EP1893462A1
EP1893462A1 EP06764750A EP06764750A EP1893462A1 EP 1893462 A1 EP1893462 A1 EP 1893462A1 EP 06764750 A EP06764750 A EP 06764750A EP 06764750 A EP06764750 A EP 06764750A EP 1893462 A1 EP1893462 A1 EP 1893462A1
Authority
EP
European Patent Office
Prior art keywords
corrosion
cellular foam
foam
hollow body
replaced
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
EP06764750A
Other languages
German (de)
French (fr)
Other versions
EP1893462B1 (en
Inventor
Thierry Guenard
Jean-Claude Boulanger
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.)
SNCF Mobilites
Original Assignee
SNCF Mobilites
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Publication date
Application filed by SNCF Mobilites filed Critical SNCF Mobilites
Publication of EP1893462A1 publication Critical patent/EP1893462A1/en
Application granted granted Critical
Publication of EP1893462B1 publication Critical patent/EP1893462B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B05D7/22—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 internal surfaces, e.g. of tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D17/00—Construction details of vehicle bodies
    • B61D17/04—Construction details of vehicle bodies with bodies of metal; with composite, e.g. metal and wood body structures
    • B61D17/18—Internal lining, e.g. insulating
    • 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
    • C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
    • C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
    • 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
    • C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
    • C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
    • C23F11/18—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using inorganic inhibitors
    • C23F11/187—Mixtures of inorganic inhibitors
    • C23F11/188—Mixtures of inorganic inhibitors containing phosphates

Abstract

According to the invention, a hollow body with a surface (18) which is difficult to access and is to be preserved from corrosion is treated by injecting an alveolar foam supported by an anticorrosive agent thereinto. A metallic structure (10) is produced by assembling the structure (10) and then treating the surfaces (18) of the structure (10) that are difficult to access with anticorrosive protection treatment. The invention can be applied to railway carriages.

Description

Procédé de traitement anti-corrosion des corps creux, procédé de réalisation d'une structure métallique traitée selon le procédé et procédé de maintenance de la structureProcess for the anti-corrosion treatment of hollow bodies, process for producing a metal structure treated according to the method and method for maintaining the structure
L'invention concerne les procédés de traitement de protection des corps creux ou des structures métalliques creuses contre la corrosion.The invention relates to protective treatment methods for hollow bodies or hollow metal structures against corrosion.
Les structures métalliques ici en question sont des structures importantes présentant des surfaces difficiles d'accès pour y déposer une peinture anti- corrosion au pinceau ou au pistolet. Elles sont creuses pour en réduire le poids.The metal structures in question here are large structures with difficult-to-access surfaces for depositing an anti-corrosion paint with a brush or a spray gun. They are hollow to reduce the weight.
C'est notamment le cas des structures telles qu'on en utilise dans la construction des bogies ou châssis des wagons de chemin de fer, comportant des corps creux, traverses, tasseaux ou autres profilés, supportant les planchers ou les parois de ces wagons. Le domaine d'application de l'invention n'est naturellement pas limité au transport ferroviaire, tout autre forme de transport ou tout autre domaine de construction pouvant parfaitement constituer un terrain d'application de l'invention.This is particularly the case for structures such as those used in the construction of bogies or chassis of railroad cars, comprising hollow bodies, sleepers, cleats or other profiles, supporting the floors or the walls of these wagons. The field of application of the invention is of course not limited to rail transport, any other form of transport or any other field of construction which can perfectly constitute a field of application of the invention.
Il est donc difficile de protéger l'intérieur de ces corps creux autrement qu'au pinceau coudé ou qu'avec un outil de pulvérisation de peinture, tel qu'un pistolet ou une buse spécifique, l'immersion dans des bains de revêtement anti-corrosion n'étant pas possible à cause de la taille des corps creux, avant assemblage, ou des structures qu'ils renforcent, après assemblage.It is therefore difficult to protect the interior of these hollow bodies other than with the angled brush or with a paint spraying tool, such as a spray gun or a specific nozzle, the immersion in baths anti-coating. corrosion is not possible because of the size of the hollow bodies, before assembly, or structures they reinforce, after assembly.
Toutes les méthodes d'aujourd'hui sont très coûteuses car elles demandent beaucoup de main d'œuvre et beaucoup de temps.All methods today are very expensive because they require a lot of manpower and a lot of time.
C'est en cherchant une solution plus économique que la demanderesse a eu l'idée de son invention. A cet effet, l'invention concerne un procédé de traitement de protection anticorrosion d'un corps creux à surface difficile d'accès à préserver de la corrosion, comportant au moins une étape d'injection dans le corps creux d'une mousse alvéolaire support d'un agent anti-corrosion et d'un agent ignifuge ou d'un isolant thermique.It was while seeking a more economical solution that the plaintiff had the idea of her invention. To this end, the invention relates to a corrosion protection treatment process of a hollow body with difficult access surface to preserve corrosion, comprising at least one step of injection into the hollow body of a cellular foam carrier an anti-corrosion agent and a flame retardant or thermal insulator.
Par injection, on atteint aisément toutes les surfaces difficiles d'accès qui sont à protéger. Il peut s'agir par exemple des traverses ou profilés métalliques composant les structures de caisses ou organes sous caisse qui nécessitent une protection anti-corrosion efficace. En même temps, puisque la mousse alvéolaire reste en place après application, ces surfaces, lorsqu'il s'agit de planchers, sont recouvertes d'un matériau imperméable à l'eau ou aux détergents de nettoyage et qui participe à la protection anti-corrosion.By injection, we easily reach all difficult to access surfaces that are to be protected. It may be, for example, sleepers or metal profiles constituting the crate structures or underbody bodies that require effective anti-corrosion protection. At the same time, since the cellular foam remains in place after application, these surfaces, when it comes to floors, are covered with a material impervious to water or cleaning detergents and which contributes to the protection against corrosion.
De préférence, on injecte un mélange d'un premier composant d'expansion d'un second composant support de l'agent anti-corrosion pour produire la mousse alvéolaire anti-corrosion et de l'agent ignifuge ou de l'isolant thermique.Preferably, a mixture of a first expansion component of a second anti-corrosion agent support component is injected to produce the anti-corrosion foam and flame retardant or thermal insulation.
II devient ainsi possible d'effectuer des opérations d'assemblage ou de désassemblage ultérieurs, par exemple par soudage, sans détériorer la protection anti-corrosion de l'environnement immédiat des zones de la structure protégée objets de ces opérations, ou des opérations de nettoyage, sans procéder à un quelconque démontage préalable.It thus becomes possible to carry out subsequent assembly or disassembly operations, for example by welding, without damaging the anti-corrosion protection of the immediate environment of the zones of the protected structure that are the objects of these operations, or cleaning operations. without any prior disassembly.
L'invention concerne également un procédé de réalisation d'une structure métallique comprenant les étapes de : - assemblage de la structure puis - traitement de protection anti-corrosion des surfaces difficiles d'accès de la structure selon le procédé ci-dessus.The invention also relates to a method for producing a metal structure comprising the steps of: - assembling the structure and - anti-corrosion protection treatment difficult access surfaces of the structure according to the above method.
Ce procédé convient particulièrement bien à la réalisation des structures métalliques de caisses (corps creux), des planchers ou des cloisons de matériel ferroviaire ou de bateaux lorsqu'au moins une des parois est métallique et qu'elle nécessite un traitement anti-corrosion particulier.This method is particularly suitable for the realization of metal structures of boxes (hollow bodies), floors or partitions of material rail or boats when at least one of the walls is metal and requires special anti-corrosion treatment.
L'invention concerne enfin un procédé de maintenance d'une structure métallique par remplacement d'une partie de la structure, la structure comportant par ailleurs au moins un corps creux, protégé par une mousse alvéolaire selon le procédé de l'invention, et au moins un élément inflammable séparé de la partie de structure à remplacer par la mousse alvéolaire, caractérisé par le fait que, la mousse alvéolaire étant une barrière thermique ininflammable, on remplace directement ladite partie de structure sans démontage préalable dudit élément inflammable.The invention finally relates to a method of maintenance of a metal structure by replacing a part of the structure, the structure also comprising at least one hollow body, protected by a cellular foam according to the method of the invention, and to minus a flammable element separated from the structural part to be replaced by the cellular foam, characterized in that, the cellular foam being a non-flammable thermal barrier, said structural portion is directly replaced without prior disassembly of said flammable element.
L'invention sera mieux comprise à l'aide de la description suivante du procédé de traitement de protection anti-corrosion selon l'invention, en référence au dessin annexé, sur lequel :The invention will be better understood with the aid of the following description of the anti-corrosion protection treatment process according to the invention, with reference to the appended drawing, in which:
- la figure 1 est une vue en perspective d'une structure comportant des surfaces difficiles d'accès, à protéger contre la corrosion etFIG. 1 is a perspective view of a structure comprising surfaces that are difficult to access, to protect against corrosion and
- la figure 2 est une vue en perspective d'une structure de plancher de wagon de chemin de fer et qui comporte une partie à réparer.- Figure 2 is a perspective view of a railway car floor structure and which comprises a part to be repaired.
En référence à la figure 1, une structure 1 susceptible d'être soumise à des agressions corrosives, soit par l'air ambiant, soit par l'eau, notamment lors de nettoyages à l'aide de détergents, comporte des flans de tôle 2, 3, ou plus, assemblés par des tasseaux métalliques 4, servant d'entretoises.With reference to FIG. 1, a structure 1 liable to be subjected to corrosive attacks, either by the ambient air or by the water, in particular during cleaning with the aid of detergents, comprises sheet blanks 2 , 3 or more, assembled by metal cleats 4, serving as spacers.
Les tasseaux 4 sont creux et présentent des surfaces 5 qu'il faut entièrement garantir de toute corrosion mais qui sont difficilement accessibles au pinceau ou au pistolet nécessaires au dépôt d'une peinture primaire.The cleats 4 are hollow and have surfaces 5 which must be completely guaranteed of any corrosion but are difficult to access by brush or spray gun required for the deposition of a primary paint.
L'assemblage étant effectué par soudage, il n'est pas possible d'appliquer une couche de peinture protectrice sur les surfaces des tôles 2, 3 et sur les tasseaux 4 séparément, par exemple d'une part au pinceau et d'autre part dans un bac convenablement dimensionné et contenant un bain anti-oxydant, de façon à baigner les surfaces 5 complètement. L'opération de soudage détruirait localement la protection venant d'être appliquée. Et la structure complète 1 est trop importante pour être traitée par bain.The assembly being performed by welding, it is not possible to apply a layer of protective paint on the surfaces of the sheets 2, 3 and the cleats 4 separately, for example on the one hand by brush and on the other hand in a suitably sized container and containing an antioxidant bath, so as to bathe the surfaces 5 completely. The welding operation would destroy locally the protection just applied. And the complete structure 1 is too important to be treated by bath.
On procède alors comme suit :Then proceed as follows:
- on assemble la structure 1 non protégée,the unprotected structure 1 is assembled,
- on injecte simultanément, au moyen d'un pistolet à deux becs, deux composants A et B, A étant une mousse alvéolaire minérale à laquelle on a ajouté un agent anti-corrosion et des pigments d'adhérence, et éventuellement des agents ignifuge, isolant thermique, phonique, ... et B, un produit provoquant l'expansion de la mousse alvéolaire A, quand A et B sont en contact.two components A and B are simultaneously injected by means of a two-nozzle gun, A being a mineral foam foam to which an anti-corrosion agent and adhesion pigments have been added, and possibly flame retardants, thermal insulation, phonic, ... and B, a product causing the expansion of the cellular foam A, when A and B are in contact.
L'expansion du composant A transporte les agents additionnels supportés par la mousse sur toutes les parties des surfaces 5, même celles qui sont hors de vue, et garantit leur protection complète.The expansion of component A transports the additional agents supported by the foam on all parts of the surfaces 5, even those that are out of sight, and guarantees their complete protection.
La mousse alvéolaire A ainsi expansée reste en place après application pour recouvrir toutes les surfaces, ce qui imperméabilise la structure 1 et participe à sa protection anti-corrosion. Au besoin, il est possible d'intégrer à la mousse alvéolaire A un agent élastique imperméable.Foamed foam A thus expanded remains in place after application to cover all surfaces, which waterproofs the structure 1 and contributes to its anti-corrosion protection. If necessary, it is possible to integrate an impervious elastic agent into the cellular foam A.
Pour A et B, on préfère ici un produit à deux composants minéraux, qui est composé soit d'un silicone ablatif, qui se transforme en consommant de l'énergie, et intumescent, avec formation d'une mousse isolante thermique, soit de composants minéraux et généralement deux bases, par exemple un phosphate de zinc et un calcaire, tel que du carbonate de calcium. Ces produits présentent en outre l'intérêt d'être solubles dans l'eau, ce qui facilite le rinçage et le rend non polluant. Les produits tels que le polyuréthane présenteraient l'inconvénient d'être inflammables tandis que les isocyanates nécessiteraient des solvants de rinçage des outils, rédhibitoires pour 1 ' environnement.For A and B, a two-component mineral product is preferred, which is composed of either an ablative silicone, which is converted into energy-consuming, and intumescent, with formation of thermal insulating foam, or components minerals and usually two bases, for example a zinc phosphate and a limestone, such as calcium carbonate. These products also have the advantage of being soluble in water, which facilitates rinsing and makes it non-polluting. Products such as polyurethane have the disadvantage of being flammable while isocyanates require rinsing solvents tools, unacceptable for the environment.
On peut choisir par exemple une composition parmi celles proposées dans le document PCT/BE 95.00106, formant une couche de résine inorganique, adhésive, ininflammable, appliquée à la couverture de surface à protéger, à utiliser avec un composant d'expansion mis en proportion suffisante pour obtenir une mousse alvéolaire expansée pouvant être expansée dans des proportions correspondant au but recherché ici.For example, one of the compositions proposed in PCT / BE 95.00106, forming an inorganic, adhesive, non-flammable resin layer, applied to the surface covering to be protected, for use with an expansion component set in sufficient proportion to obtain an expanded foam foam that can be expanded in proportions corresponding to the purpose sought here.
Les minéraux utilisés sont composés en majorité de combinaisons de phosphates et de carbonates de calcium, notamment des plastifiants tels que phtalate de dibutyle, de dioctyle, de cyclohexyle, ou de diméthyl glucol, ou tels que benzoate de benzyle, huile de ricin, ricinoléate de glycérol ou de méthyle, adipate d'octyle, heptanoate ou butyrate de pentaérythritol ou de dipropylène glycol, ou encore butyrate de glycérol ou de dipropylèneglycol, camphre.The minerals used are composed mainly of combinations of phosphates and calcium carbonates, especially plasticizers such as dibutyl phthalate, dioctyl, cyclohexyl, or dimethylglucol, or such as benzyl benzoate, castor oil, ricinoleate glycerol or methyl, octyl adipate, heptanoate or pentaerythritol butyrate or dipropylene glycol, or glycerol or dipropylene glycol butyrate, camphor.
En ce qui concerne les plastifiants aussi ignifugeants, on peut choisir parmi le phosphate de tricrésyle, de triphényle, ou de trichloréthyle.With regard to plasticizers which are also flame retardant, it is possible to choose from tricresyl phosphate, triphenyl phosphate or trichloroethyl phosphate.
On peut enfin ajouter des pigments améliorant l'isolement phonique.Finally, pigments improving the sound insulation can be added.
Pour diminuer la quantité de matière des produits nécessaires, on peut adjoindre une matière de remplissage telle que le chanvre ou d'autres composants peu coûteux. La quantité de produit nécessaire, donc son coût, s'en trouve réduite d'autant.To reduce the amount of material needed, a filler such as hemp or other inexpensive components may be added. The quantity of product necessary, and therefore its cost, is reduced accordingly.
Des essais d'environnement, notamment au brouillard salin, ont été effectués sur des corps creux, traités selon le procédé de l'invention. Ces derniers, en l'espèce des corps creux métalliques, sont coupés transversalement après exposition aux brouillards salins pendant 1000 puis 1500 heures de façon à permettre une constatation visuelle du résultat obtenu. D'autres essais, avec des corps en plastique transparent, de façon à permettre une constatation visuelle de l'expansion et de la propagation du produit, montrent l'efficacité du procédé.Environmental tests, in particular with salt spray, were carried out on hollow bodies, treated according to the method of the invention. The latter, in this case metal hollow bodies, are cut transversely after exposure to salt spray for 1000 and 1500 hours so as to allow a visual observation of the result obtained. Other tests, with transparent plastic bodies, so as to allow a visual observation of the expansion and propagation of the product, show the efficiency of the process.
Et les moyens ci-dessus, pistolet et produits A et B, permettent de réaliser à bien meilleur prix une structure métallique seulement par mise en œuvre des étapes d'assemblage de la structure 1, 2, 3, 4, puis de traitement de la protection anti-corrosion des surfaces 5 difficiles d'accès.And the above means, pistol and products A and B, make it possible to realize much better price a metal structure only by implementing the assembly steps of the structure 1, 2, 3, 4, and then treatment of the anti-corrosion protection of surfaces 5 difficult to access.
Ces moyens conviennent particulièrement bien, en référence à la figure 2, à la réalisation et à la maintenance (encore appelée opération rni-vie) des structures 10 de plancher, ou de cloison, des wagons de chemin de fer.These means are particularly well suited, with reference to FIG. 2, to the production and maintenance (also called rni-life operation) of the floor or partition structures of railroad cars.
L'exemple de structure 10 de la figure 2 comporte ici un plancher en bois 11 et un bâti métallique 12 à l'image de la structure de la figure 1. Elle comporte des tôles métalliques 13 et 20 assemblées par des tasseaux latéraux 15 (mais ils pourraient aussi bien être transversaux).The example of structure 10 of FIG. 2 here comprises a wooden floor 11 and a metal frame 12 in the image of the structure of FIG. 1. It comprises metal sheets 13 and 20 assembled by lateral cleats 15 (but they might as well be transversal).
La tôle 20 est ajourée et comporte des orifices fonctionnels 21 pour fixations diverses à utiliser ultérieurement. Elle est rigidifiée par un profilé de renfortThe sheet 20 is perforated and has functional orifices 21 for various fasteners to be used later. It is stiffened by a reinforcement profile
14, 17 solidaire de la tôle 13.14, 17 integral with the sheet 13.
Les tasseaux comportent ici des ouvertures 16 et le profilé de renfort 14, 17, des ouvertures 19 permettant de faciliter les opérations d'injection de la mousse A dans un corps creux 18 présentant des surfaces difficilement accessibles à protéger.The cleats comprise here openings 16 and the reinforcement profile 14, 17, openings 19 to facilitate the injection operations of the foam A in a hollow body 18 having difficult to access surfaces to protect.
Pour ne prendre que l'exemple de la structure de plancher 10, là où il fallait prévoir, après fabrication de la structure 10 et avant pose du plancher en bois 11 sur le bâti métallique 12, des étapes d'application de peinture primaire anticorrosion, de revêtement phonique, de bandes de caoutchouc et de tasseaux, de laine de roche entre les tasseaux, une seule étape d'injection du produit A, B suffira maintenant.To take only the example of the floor structure 10, where it was necessary to provide, after manufacture of the structure 10 and before laying the wooden floor 11 on the metal frame 12, steps of application of primary paint anticorrosion, soundproofing, rubber bands and cleats, rock wool between the cleats, a single injection step of the product A, B will suffice now.
On remarquera qu'il est aussi possible d'utiliser le procédé de traitement de protection ci-dessus pour protéger des câbles électriques lorsqu'ils passent dans le corps creux 18. On se sert de la mousse alvéolaire pour les envelopper et réaliser ainsi une gaine de protection, notamment contre le-feu. L 'entretien ordinaire des wagons devant comporter des opérations régulières de nettoyage, il peut arriver que des infiltrations d'eau et de détergents résultant de nettoyages successifs dégradent telle ou telle partie 22, telle que dessinée en pointillé sur la figure 2, de la structure métallique 10 jusqu'à nécessiter sa réparation, par exemple lors des opérations dites de mi-vie.It will be noted that it is also possible to use the above protective treatment method to protect electrical cables as they pass through the hollow body 18. The cellular foam is used to envelop them and thus to form a sheath protection, especially against fire. Since the ordinary maintenance of the wagons must involve regular cleaning operations, it may happen that infiltrations of water and detergents resulting from successive cleanings degrade such or such part 22, as shown in dashed lines in FIG. 2, of the structure. metal 10 to require repair, for example during so-called mid-life operations.
Si la structure métallique 10 est construite suivant le procédé de construction ci-dessus, on peut découper la partie détériorée 23 de la partie 22 au chalumeau sans avoir à démonter les parties de plancher en bois 11, ou tout élément inflammable situé à proximité, ou sièges, moquette reposant sur ce plancher. En effet, la mousse alvéolaire A expansée dans le corps creux 18 pour le protéger s'interpose entre la partie 23 à remplacer et le plancher 11, et, le séparant de la partie 23, l'isole thermiquement et le protège du feu.If the metal structure 10 is constructed according to the above construction method, the deteriorated portion 23 of the torch portion 22 may be cut without having to disassemble the wooden floor portions 11, or any flammable element located nearby, or seats, carpet resting on this floor. Indeed, the cellular foam A expanded in the hollow body 18 to protect it is interposed between the part 23 to be replaced and the floor 11, and, separating it from the part 23, insulates it thermally and protects it from the fire.
II suffit donc ensuite de procéder à la fabrication de la nouvelle partie 23 et à son soudage à la partie 22, puis, le remplacement étant terminé, d'appliquer la protection anti-corrosion des nouvelles surfaces difficiles d'accès de la partie remplacée 23 selon le procédé de protection ci-dessus. La mousse alvéolaire jouant ainsi le rôle de barrière thermique ininflammable, on peut remplacer directement la partie 23 par soudage sans démonter l'élément inflammable 11. It is then only necessary to proceed to the manufacture of the new part 23 and its welding to the part 22, then, the replacement being completed, to apply the anti-corrosion protection of the new hard-to-reach surfaces of the replaced part 23 according to the above protection method. As the cellular foam thus acts as a non-flammable thermal barrier, the part 23 can be replaced by welding without dismounting the flammable element 11.

Claims

REVENDICATIONS
1. -. Procédé de traitement de protection anti-corrosion d'un corps creux (1) à surface (5, 18) difficile d'accès à préserver de la corrosion, comportant au moins une étape d'injection dans le corps creux d'une mousse alvéolaire (A) support d'un agent anti-corrosion et d'un agent ignifuge ou d'un isolant thermique.1. -. Process for the anti-corrosion treatment of a hollow body (1) with a surface (5, 18) difficult to access to preserve corrosion, comprising at least one injection step in the hollow body of a cellular foam (A) support of an anti-corrosion agent and a flame retardant or thermal insulator.
2. - Procédé selon la revendication I5 dans lequel on injecte un mélange d'un premier composant (B) d'expansion d'un second composant (A) support de l'agent anti-corrosion et de l'agent ignifuge ou de l'isolant thermique pour produire la mousse alvéolaire anti-corrosion.2. - Process according to claim I 5 wherein a mixture of a first component (B) of expansion of a second component (A) supporting the anti-corrosion agent and the flame retardant or thermal insulation to produce anti-corrosion foam.
3. - Procédé selon l'une des revendications 1 et 2, dans lequel la mousse alvéolaire (A) comporte des pigments d'adhérence.3. - Method according to one of claims 1 and 2, wherein the cellular foam (A) comprises adhesion pigments.
4. - Procédé selon l'une des revendications 1 à 3, dans lequel la mousse alvéolaire (A) supporte un isolant phonique.4. - Method according to one of claims 1 to 3, wherein the cellular foam (A) supports a sound insulator.
5. - Procédé selon l'une des revendications 1 à 4, dans lequel la mousse alvéolaire (A) supporte un agent élastique imperméable.5. - Method according to one of claims 1 to 4, wherein the cellular foam (A) supports an impervious elastic agent.
6. - Procédé selon l'une des revendications 1 à 5, dans lequel la mousse alvéolaire (A) comporte un produit de remplissage.6. - Method according to one of claims 1 to 5, wherein the cellular foam (A) comprises a filler.
7. - Procédé selon la revendication 6, dans lequel le produit de remplissage est du chanvre.7. - Process according to claim 6, wherein the filler is hemp.
8. - Procédé de réalisation d'une structure métallique (I5 10) comprenant les étapes de :8. - Process for producing a metal structure (I 5 10) comprising the steps of:
- assemblage de la structure (I5 10) puis- assembly of the structure (I 5 10) then
- traitement de protection anti-corrosion des surfaces difficiles d'accès (5, 18) de la structure (1, 10) selon le procédé de l'une des revendications l à 7. - anti-corrosion protection treatment difficult access surfaces (5, 18) of the structure (1, 10) according to the method of one of claims 1 to 7.
9. - Application du procédé selon la revendication 8 à la réalisation des structures de plancher (10) ou de parois des wagons de chemin de fer.9. - Application of the method according to claim 8 to the realization of floor structures (10) or walls of railroad cars.
10. - Procédé de maintenance d'une structure métallique (1, 10) par remplacement d'une partie (23) de la structure (22), la structure comportant par ailleurs au moins un corps creux (18), protégé par une mousse alvéolaire selon le procédé de l'une des revendications 1 à 7, et au moins un élément inflammable (11) séparé de la partie (23) de structure à remplacer par la mousse alvéolaire, caractérisé par le fait que, la mousse alvéolaire étant une barrière thermique ininflammable, on remplace directement ladite partie (23) de structure sans démontage préalable dudit élément inflammable (11).10. - A method of maintaining a metal structure (1, 10) by replacing a portion (23) of the structure (22), the structure further comprising at least one hollow body (18), protected by a foam honeycomb according to the method of one of claims 1 to 7, and at least one flammable element (11) separated from the portion (23) of structure to be replaced by the cellular foam, characterized in that, the cellular foam being a non-flammable thermal barrier, said structure portion (23) is directly replaced without prior disassembly of said flammable element (11).
11. — Procédé de maintenance selon la revendication 10, dans lequel on découpe ladite partie de structure (23) au chalumeau et on la remplace par une autre partie qu'on soude à la structure (22). 11. - A maintenance process according to claim 10, wherein said portion of structure (23) is cut by the torch and replaced by another portion that is welded to the structure (22).
EP06764750A 2005-06-09 2006-06-08 Method for the anticorrosive treatment of hollow bodies, method for producing a metallic structure treated according to said method, and method for maintaining the structure Expired - Fee Related EP1893462B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0505848A FR2886947B1 (en) 2005-06-09 2005-06-09 METHOD FOR ANTI-CORROSION TREATMENT OF HOLLOW BODIES, METHOD FOR PRODUCING METAL STRUCTURE TREATED WITH THE METHOD AND METHOD FOR MAINTENANCE OF THE STRUCTURE
PCT/FR2006/001298 WO2006131650A1 (en) 2005-06-09 2006-06-08 Method for the anticorrosive treatment of hollow bodies, method for producing a metallic structure treated according to said method, and method for maintaining the structure

Publications (2)

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EP1893462A1 true EP1893462A1 (en) 2008-03-05
EP1893462B1 EP1893462B1 (en) 2012-10-10

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US (1) US8252371B2 (en)
EP (1) EP1893462B1 (en)
JP (1) JP4903198B2 (en)
KR (1) KR101272734B1 (en)
CN (1) CN101223068B (en)
BR (1) BRPI0611723A2 (en)
ES (1) ES2394485T3 (en)
FR (1) FR2886947B1 (en)
MA (1) MA29611B1 (en)
WO (1) WO2006131650A1 (en)

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RU2528695C1 (en) * 2013-06-11 2014-09-20 Общество с ограниченной ответственностью "Новые углеволоконные материалы" Trenchless method for application of insulation onto internal surface of pipeline
CN103604023B (en) * 2013-10-17 2017-01-18 中国石油化工股份有限公司青岛安全工程研究院 Method for preventing corrosion on inside of pipeline
RU2770873C1 (en) * 2021-07-23 2022-04-22 Общество с ограниченной ответственностью "Всесоюзный научно-исследовательский центр транспортных технологий" (ООО "ВНИЦТТ") Method for forming the protective coating of the railway car body

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US20080199608A1 (en) 2008-08-21
BRPI0611723A2 (en) 2012-08-28
ES2394485T3 (en) 2013-02-01
MA29611B1 (en) 2008-07-01
JP4903198B2 (en) 2012-03-28
WO2006131650A1 (en) 2006-12-14
KR20080038122A (en) 2008-05-02
CN101223068B (en) 2011-06-15
US8252371B2 (en) 2012-08-28
JP2008542551A (en) 2008-11-27
EP1893462B1 (en) 2012-10-10
KR101272734B1 (en) 2013-06-10
FR2886947A1 (en) 2006-12-15
CN101223068A (en) 2008-07-16
FR2886947B1 (en) 2007-10-12

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