Corrosion prevention and / or treatment process

Description

2. Relatively advanced internal corrosion, with rust scales beginning to form and detach, thus threatening the stability of the structure. When significant holes form in the tubes, the current solution is to replace these tubes after cutting out the corroded tube and welding a new tube onto the structure. Another solution is to cut out the damaged section of the tube, 5 for example using a jigsaw and welding a new section of tube onto the original tube. Generally, in a ribbed structure, when corrosion is observed in one tube, other tubes are also corroded. Replacing each of these tubes poses problems in terms of time and safety, particularly when using a saw and welding equipment in an elevated environment. Furthermore, replacing these tubes requires the fabrication of new replacement tubes whose dimensions must match the existing structure.Replacing pipes is therefore a corrective measure resulting from a manufacturing defect in the pipes and / or exposure to the elements over several years.15 US patent 8529992B2 describes a device for coating heating or air conditioning ducts, the device comprising an injection line16 equipped with an injection nozzle18, the injection line being supported by a rod22 mounted on a housing28 containing a camera26. The housing28 is equipped with a plurality of spacers32 forming radial protrusions relative to the housing. These spacers20 are supported against the inner wall of the duct to be treated (Fig. 4). The camera26 and its housing28 are recessed relative to the injection nozzle18. The spacers thus positioned damage the coating of the internal walls of the conduit during the progression of the nozzle 18 in the conduit. On the other hand, the device is relatively bulky and can only be inserted through an axial hole of a conduit of relatively large diameter 25.US2019 / 0224716 describes a device for coating a tubular wall, wherein the device is configured to project an aerosol of solid particles, more particularly ceramic particles, a mixture of ceramic-metal particles, or a mixture of ceramic-polymer particles. The device requires a carrier gas source for aerosol formation. The device is configured to perform a rotational movement along the axis of insertion of the tube into a conduit. The device is also bulky and can only be inserted through a axial hole in a conduit of relatively large diameter. On the other hand, the use of metal and / or ceramic particles for treating pipes in a network of structures spread over a territory is a relatively expensive solution. Document JPH03168 describes a device for covering the internal walls of a 3m high tube of a latticed structure by inserting a nozzle through an existing drainage hole at the bottom of the tube.This device comprises an injection conduit 5 including a 90° elbow and fitted with a nozzle. The nozzle is inserted through a hole in the bottom of a 3-meter-high tube, and a portion of the injection conduit is inserted into the bottom of the tube by pivoting. The movement of the nozzle in the tube is limited at the bottom of the tube to the level of the drain hole. Anti-rust paint is injected via the nozzle by means of a compressor requiring a pressure of 50 kg to coat the entire walls. Such a system and method does not provide an optimal solution for coating the internal walls of a tube. Document JPH06296909 describes a device for coating internal tubular walls of a woven structure. The device includes an injection nozzle 4 around 15 in which is disposed an elastic spacer 5 capable of deforming.The urethral spacer 5 is inserted with the nozzle 4 through an axial hole in a tube. The protrusions of the spacer fold as they pass through the hole and extend into the internal space against the inner walls of the tube so as to maintain the nozzle in a central position within the tube. The nozzle is axially movable within the tube; however, 20 the spacer against the inner walls of the tube is liable to scratch the coating in the direction of insertion of the injection conduit into the tube, and when the injection conduit exits the tube, the urethral spacer comes into contact with the inner walls of the tube near the axial hole, which has the effect of scratching the coating applied at that point. 25 Document JP2021017631 describes the injection of reagents for the formation of a polyurethane foam, combined with a rust inhibitor, into a tube of a lattice structure. The formation of a polyurethane foam inside tubes of a lattice structure does not guarantee the complete and durable coating of the internal walls of these tubes.A polyurethane foam filling the inside of a tube with 30 drainage holes can become saturated with water and prevent its drainage. A polyurethane foam, due to its texture, cannot provide a watertight barrier against the internal walls of a tube, and therefore cannot stop any corrosion that has already begun. Furthermore, filling a tube with polyurethane foam prevents any further treatment of the tube's interior. Documents WO2015107913 and US10247349 describe a nozzle for injecting two liquids into a tube, so as to also form a polyurethane foam. Document JP2023124363 also describes a device for injecting a polyurethane foam into a tube. Document US4251573 describes a device comprising a semi-rigid injection conduit equipped with a nozzle for spraying a rust-inhibiting composition into a serpentine tube formed of several straight portions. The injection conduit is inserted through an axial end of a tube portion.Document KR20220049284 describes a method for coating the inside of a tube in which the tube is sealed at one end, then lifted and filled with a coating agent, followed by a step of treating the coating agent with a gas comprising an amine group that reacts with the coating agent to form the desired coating. This method does not apply to the treatment of a tube already present on an installation. Document EP3470724 describes a nozzle for a device for coating the internal walls of a tube, the width of which is slightly less than the internal diameter of the tube. Such a nozzle can only be inserted through an axial hole in the tube. Document DE10335746 describes a process for injecting a cold wax transformed into foam by means of a gas into a cavity comprising an entry point and an exit point.20 Document US20190022686 describes a process for aerating an anti-corrosion composition so as to form a mist in a cavity whose internal volume comprises several partitions, and to deposit the anti-corrosion agent on the internal walls of the cavity.In order to treat a large number of interlocking tubes in a significant telecommunications antenna array more quickly and safely, there is a need for an alternative method of treating or maintaining these tubes. Summary of the invention: The present invention aims to solve the aforementioned problems. According to a first aspect, the present invention relates to an anti-corrosion treatment method in an interlocking tube, in which the tube comprises a first hole positioned radially near a first axial end of the tube and a second hole positioned radially near a second axial end of the tube. Generally, the first and second holes are pre-existing drainage holes. The treatment process according to the invention includes a step of injecting an anti-corrosion composition through a first hole so as to coat part or all of the internal walls of the tube or formed inside the tube.In the context of the present invention, "anti-corrosion composition" means a composition, preferably liquid before drying by exposure to air, at a temperature between 5°C and 30°C, enabling the prevention and / or stopping of a corrosion phenomenon of a metallic material.10 Optionally, the method further includes a step of evacuating residual anti-corrosion composition out of the tube, preferably through the second hole. The term "residual anti-corrosion composition" or "residual composition" refers to the anti-corrosion composition that has not adhered to the wall surface and has retained a viscosity allowing its evacuation from the tube.15 In one embodiment of the process, the second hole is temporarily sealed beforehand prior to the injection of the composition. In this way, the tube can be completely filled with the anti-corrosion composition and the asperities of the internal surface of the tube can be effectively impregnated during a deposition time, for example, greater than one minute.20 When the second drainage hole in a tube has been sealed, it is necessary to provide ventilation to allow the injection of the anti-corrosion composition inside the tube. In one embodiment of the process, a ventilation hole may be drilled near the first hole. Alternatively, an injection means used to inject the composition may include an air vent nozzle, making the drilling of the ventilation hole optional. Alternatively, the injection means includes an injection conduit preferably equipped with an injection nozzle, sized relative to the first hole so as to allow air to escape during the injection of the composition. In one embodiment of the process, the composition is injected into the tube so as to fill the tube.30 In one embodiment of the process, the composition is injected into the tube via the first hole so as to fill the tube, and when the tube is filled, the second hole is BE2025 / 5090 6 unsealed in order to evacuate the residual composition leaving a layer of the composition on the internal walls of the tube.In one embodiment of the process, the injection step is carried out by inserting, via the first hole, a preferably flexible injection tube, the injection tube being equipped with at least one nozzle configured to project the composition axially over 360° so as to coat the entire internal walls of the tube. Optionally, said nozzle is configured to project the composition also frontally and / or rearward. According to one embodiment, the injection tube is inserted to at least one of the two axial ends of the tube, and the anti-corrosion composition is projected onto the walls during the insertion of the injection tube into the tube and / or during its withdrawal from the tube. Preferably, the insertion of the injection conduit into the tube and / or the removal of the injection conduit from the tube is carried out simultaneously with the projection of decomposition onto the walls of the tube, preferably by moving the injection conduit at a speed of between 0.5cm / s and 10cm / s, preferably between 0.5cm / s and 5cm / s, more preferably between 0.5cm / s and 2.5cm / s.Preferably, the composition is sprayed onto the walls at a flow rate of between 2 and 5 L / min. According to another embodiment, the process includes a preliminary step 20 of inspecting the internal walls of the tube so as to determine one or more areas of the internal wall to be treated, followed by a step of inserting the injection tube into the tube so as to position the nozzle near the area(s) of the internal wall to be treated and a step of spraying the anti-corrosion composition onto the area(s) of the internal wall to be treated, followed by a step of removing the injection tube from the tube. 25 In one embodiment of the process, the residual composition is discharged from the tube via the second hole and is subjected to a recycling step, the recycling preferably comprising a filtration step. In one embodiment of the process, the second hole is connected in a sealed manner to a conduit fitted with a valve, the conduit being able to be connected to a pump 30 which can be operated to facilitate the removal of any debris resulting from corrosion inside the tube.BE2025 / 5090 7 In one embodiment of the process, a cleaning fluid and / or a gas may be injected before the anti-corrosion composition. In one embodiment of the process, the anti-corrosion composition and optionally the cleaning fluid and / or gas are injected under pressure. In one embodiment of the process, the anti-corrosion composition is a rust-resistant and / or hydrophobic paint. In one embodiment of the process, the first hole is adapted to allow the insertion of an injection conduit. In one embodiment of the process, the second hole is adapted to allow the insertion of a sealing means and / or a conduit in a watertight manner.10 In one embodiment of the process, the first and second holes are temporarily sealed, preferably between 12 and 72 hours, more preferably between 24 and 48 hours, after the residual anti-corrosion paint has been removed from the tube, so as to allow the anti-corrosion composition to dry on the internal walls of the tube and to prevent any possible infiltration of rainwater which could compromise 15 the adhesion of the anti-corrosion composition to the internal walls of the tube being treated. Preferably, when a ventilation hole is made near the first hole, the ventilation hole is also sealed, preferably permanently, after the residual anti-corrosion paint has been removed from the tube. Preferably, the process also includes a preliminary step of examination by endoscopic camera of the internal surface of the tube before the step of injecting anti-corrosion composition.Preferably, the process further comprises a subsequent step of examining the internal surface of the tube with an endoscopic camera after the injection and drying of the anti-corrosion composition into the tube, so as to verify the quality of the coating of the anti-corrosion composition thus obtained on the internal walls of the tube. According to a second aspect, the present invention relates to an anti-corrosion treatment device for a tube of a structural element. The treatment device comprises: - A reservoir intended to receive a corrosion treatment or prevention composition; - A pump coupled to the reservoir; - An injection conduit coupled with the pump and capable of being coupled to a first hole in a tube of said structure; In one embodiment, the injection conduit is flexible and preferably wound in a rollable manner on a first support. In one embodiment, the injection conduit comprises an injection valve.5 In one embodiment, the injection line is coupled to a pressure regulator configured to ensure a constant injection rate of the anti-corrosion composition and a sufficient injection rate to spray the composition onto the internal walls of the tube. In one embodiment, the injection line is equipped with at least one nozzle 10 configured to spray the composition horizontally over 360° so as to coat the entire internal walls of the tube. In one embodiment, the device further includes a removable sealing means that can be positioned on a second hole in said tube. In one embodiment, the sealing means is coupled to a valve connected 15 to a discharge line, wherein the discharge line is preferably flexible and preferably wound in a manner that can be unwound onto a second support. In one embodiment, the discharge pipe is coupled to said tank or to a second recovery tank. In another embodiment, the discharge pipe is coupled to a filter arranged upstream of said tank or recovery tank.In one embodiment, the discharge conduit is coupled to said pump or to a second pump. In another embodiment, said pump and / or said second pump is wirelessly controlled. 25 Description of the figures Figure 1 shows a schematic view of a first embodiment of the device for treating or preventing corrosion of a tube in a woven structure according to the present invention. BE2025 / 5090 9 Figure 2 shows a schematic view of an alternative embodiment of the device for treating or preventing corrosion of a tube in a woven structure according to the present invention. Figures 3A and 3B show schematic views in longitudinal section of nozzles according to two embodiments, used for spraying anti-corrosion coatings onto the internal walls of a tube in a woven structure. The figures are presented for illustrative purposes only and are not limiting to the present invention.Other devices according to the present invention may include additional features described in more detail below, or other equivalent devices may be considered by a person skilled in the art. 10 Description of the invention The present invention relates to a method and device for treating or preventing corrosion. The device will also be referred to below as an "anti-corrosion device." Generally, corrosion refers to the alteration of a material by chemical reaction with an oxidant. Rust refers more specifically to the corrosion of iron or steel. Other metals or alloys besides iron are susceptible to corrosion. According to the present invention, a corrosion treatment process is carried out in a tube of an interlocking structure. In the context of the present invention, the term "corrosion treatment" may refer to a preventive corrosion treatment or to a curative corrosion treatment.The term "anti-corrosion composition" can refer to a composition that prevents corrosion or one that cures corrosion. The term "tube" refers to a hollow volume, cylindrical, toroidal, semi-circular, or prismatic in shape. The tube to be treated may be a member or a column. The tube to be treated generally comprises two ends attached to a structure by a fastener or a weld. The axial ends of the tube may be open or closed. Generally, the axial ends of the tube are opened and welded to a surface of the structure. Near the axial ends of the tube, pre-existing drainage holes, as mentioned above, are usually found. A first drainage hole is generally located on a radial or lateral surface of the tube, near a first axial end of the tube. A second drainage hole is generally located on a radial or lateral surface of the tube near a second axial end of the tube. Generally, the first and second holes are arranged on opposite faces of the tube.The process according to the present invention can be carried out to prevent or stop internal corrosion of the tube. The treatment process according to the invention comprises a step of injecting an anti-corrosion composition through a first drainage hole 5, so as to coat part or all of the internal walls of the tube or of the walls formed inside the tube. Prior to the treatment step, the process may include a step of examining the tube walls using an endoscopic camera in order to determine the need to treat the tube, and in certain embodiments, to determine an internal area 10 of the tube to be treated. A residual anti-corrosion composition can be removed and recovered via a second drainage hole. A ventilation hole may be drilled near the first hole. Alternatively, an injection means used to inject the composition may include an air vent nozzle, making drilling the ventilation hole optional.Alternatively, the injection means includes an injection nozzle sized relative to the first hole so as to allow air to escape during the injection of the composition. The anti-corrosion composition has a viscosity suitable for flow and pumping. The anti-corrosion paint may be a solvent-based or solvent-free anti-corrosion paint. According to a non-limiting example of the present invention, the following brand anti-rust paints may be used: -RUSTOL-OWATROL® -RUSTOLDECOBLANC -RUSTOL GALVA25 -RUSTOLC.IP -NOXYDE®PEGANOX -RDMETALUNICOAT. Preferably, the anti-corrosion composition is injected by means of an injection line, preferably flexible and coupled to a pumping system and a reservoir containing the anti-corrosion composition. The injection line advantageously includes a valve, for example a trigger, and preferably a pressure regulator arranged near the end of the line intended to be BE2025 / 5090 11 inserted into the first hole.The injection conduit may include a portion of length that can be inserted completely or partially into the tube. Alternatively, the injection conduit includes an end configured to be connected to the first drain hole. Preferably, when the drain holes of the same tube are at different heights, the first drain hole is the highest and the second drain hole is the lowest. According to a first embodiment of the tube treatment process according to the invention, the process includes a step in which the second drain hole is temporarily sealed by a sealing means. The tube is then filled with an anti-corrosion composition injected via the first drain hole. The injection of the anti-corrosion decomposition is carried out by means of an injection conduit via the first drain hole. The first drain hole can be adapted to the diameter of the injection conduit by boring or tapping.Preferably, the temporary plugging step of the second hole includes a sub-step of tapping or reaming the second hole so as to permit the insertion of a plugging means of a predetermined diameter. The plugging means may be a stopper, for example, provided with a thread and a sealing gasket. Alternatively, the plugging means may be a stopper made of rubber, cork, or an equivalent waterproof and elastic material. Preferably, the plugging means of the second hole includes a fitting coupled to a valve. The term "coupled" may refer to a direct coupling, in which the fitting and valve are formed of a single piece, or to an indirect coupling, in which the fitting is connected to the valve by a conduit. Preferably, the second hole is tapped or its diameter is machined for a tight insertion of the fitting. The 25 fitting can be threaded and fitted with a sealing gasket so as to be screwed tightly into the second hole.When the second drainage hole in a tube has been sealed, it is necessary to provide ventilation to allow the injection of the anti-corrosion composition inside the tube. A ventilation hole may be drilled near the first hole. Alternatively, an injection means used to inject the composition may include an air vent nozzle, making the drilling of the ventilation hole optional. Alternatively, the injection means includes an injection conduit, preferably BE2025 / 5090 12, fitted with an injection nozzle, sized relative to the first hole so as to allow air to escape during the injection of the composition. After injection and filling of the tube with the anti-corrosion composition, the anti-corrosion composition is preferably left to rest for a certain resting time inside the tube so as to sufficiently impregnate the internal walls of the tube and to allow the formation of a relatively uniform protective coating over the entire internal surface of the tube.When the tube includes open axial ends whose edges are welded to a surface of the structure to which the tube is fixed, these surfaces of the structure are also covered by the composition. After an optional resting time, for example between 1 minute and 2 hours, preferably between 1 minute and 60 minutes, more preferably between 1 minute and 30 minutes, or alternatively according to the recommendations of the supplier of the anti-corrosion composition, the second hole is unsealed in order to evacuate part of the anti-corrosion composition, i.e. the residual composition, which has not adhered to the internal walls of the tube or to the internal walls formed by the inside of the tube and the surface of the structure to which the tube is fixed. The evacuation of the residual anti-corrosion composition from the tube can be carried out by unscrewing the cap and collecting the residual composition in a reservoir, or when the means of sealing the second drainage hole is coupled to a valve, the valve is opened so as to collect the residual composition in a reservoir.20 The residual composition can be filtered and reused. When corrosion debris is present in the tube to be treated, the second hole through which the residual anti-corrosion composition is discharged may become blocked and prevent its recovery. To unblock the second hole, a mechanical or electric pump can be coupled to this hole and operated to draw or discharge this debris from the second hole. Preferably, after discharge of the anti-corrosion composition from the tube, a drying step is carried out for a drying time recommended by the supplier of the anti-corrosion composition, for example, between 12 and 72 hours, 30 preferably between 24 and 48 hours.During the drying stage, the existing drainage holes are preferably temporarily sealed to allow the anti-corrosion composition to dry on the internal walls of the tube and to prevent any rainwater infiltration that could compromise the adhesion of BE2025 / 5090 13 to the internal walls of the tube being treated. Once drying is complete, the drainage holes are unsealed to allow ventilation inside the tube and to prevent the accumulation of condensation inside the tube. Drainage holes can be temporarily plugged with a rubber or cork stopper, or with a threaded fitting equipped with a gasket, a self-adhesive waterproof patch or 5mm tape, or any other suitable means to prevent water from seeping into the tube during drying. After unplugging the drainage holes, an anti-corrosion coating can be applied to the drainage hole locations to prevent any corrosion from starting there.When a ventilation hole has been drilled in a tube of the interlocking structure, after the anti-corrosion compound has been removed and preferably after a drying time recommended by the supplier of said compound, this ventilation hole is resealed using a sealing method, for example, either with an epoxy or polyester putty, preferably with a hardener, or with a cover adapted to the size of the hole made, the cover being able to be made of stainless metal treated with an anti-corrosion product, or of plastic or natural or synthetic rubber, either by welding a metal piece adapted to the size of the hole, or using an anti-corrosion protective tape. Alternatively, the ventilation hole can simply be covered with one or more layers of anti-corrosion compound.According to a second embodiment of the process, the step of injecting anti-corrosion decomposition20 inside the tube includes the insertion of an injection conduit, preferably flexible, from a first drainage hole to an end of the tube, preferably opposite the end of the tube in proximity to the first drainage hole. The injection conduit preferably includes a nozzle configured to radially project the composition 6 over 360° so as to coat the entire internal walls 25 of the tube. Two examples of nozzles 20 are schematically shown in Figures 3A and 3B. In Figure 3A, one embodiment of the nozzle 20 includes a cylindrical end of the injection tube 8 comprising a rim 21 radially directed towards the interior of the cylindrical end and supporting a flow diverter 22 of the composition. The flow diverter comprises a first disc 23 provided with at least 30 an opening 24 and connected to a second solid disc 25 by a central axis 26. The diverter can be made in several parts and assembled on either side of the rim.Alternatively, a deflection piece can be made from a single piece and attached to the end of the injection duct, for example by welding or screwing. The nozzle can also be configured to project the composition horizontally over 360° as well as to project the composition frontally and optionally rearward, as shown in Figure 3B. In the embodiment of the nozzle according to Figure 3B, the nozzle is preferably made from a single piece, for example by molding or printing, and includes radial openings, at least one front opening, and rearward openings. The nozzle is attached to the end of the injection duct, for example by welding or screwing. Other types of nozzles equivalent to those described below can be used by those skilled in the art. In one embodiment of the process, the anti-corrosion composition is projected through the nozzle onto the internal walls of the tube so as to cover the entirety of the tube walls.The anti-corrosion composition can be sprayed during the insertion of the injection nozzle 10 into the tube and / or during its withdrawal from the tube. Preferably, the flow rate of the anti-corrosion composition injected through the nozzle is adjusted according to the internal diameter of the tube and the nozzle openings so that the composition reaches the tube walls. Preferably, the injection nozzle is inserted into the tube from the first hole 15 to one end of the tube, at a speed between 0.5 cm / s and 10 cm / s, simultaneously with the spraying of the anti-corrosion composition onto the internal walls of the tube. Preferably or alternatively, the injection duct is withdrawn from the tube from one end of the tube towards the first drainage hole, at a speed between 0.120 cm / s and 10 cm / s, preferably between 0.5 cm / s and 5 cm / s, simultaneously with the spraying of anti-corrosion decomposition onto the internal walls of the tube. The injection duct may be graduated to allow the user to judge the insertion and / or withdrawal speed.This embodiment of the process allows the inside of the tube to be coated without having to fill it completely. The residual composition can also be removed via the second hole as described previously, and the residual composition can be recycled after filtration. According to another embodiment of the process, the process includes a step of examining the tube walls using an endoscopic camera in order to determine an internal area of ​​the tube to be treated. Preferably, the endoscopic camera comprises a camera equipped with a lighting means and is connected to a viewing system by a flexible cable. Preferably, the camera is equipped with a swiveling head. The BE2025 / 5090 15 endoscopic camera is inserted through a drainage hole. The drainage hole can be enlarged by drilling or tapping to allow the insertion of the endoscopic camera supported by the cable, and also to allow the insertion of an injection tube. The cable can be graduated to determine the distance from the hole to the area to be treated.5 After determining an internal area of ​​the tube to be treated, an injection step of an anti-corrosion composition is carried out through a first drainage hole so as to coat the internal area of ​​the tube to be treated. The injection is carried out by inserting an injection conduit comprising a nozzle configured to project the composition horizontally over 360° so as to coat the entire internal walls of the tube, and optionally 10 also configured to project the composition frontally and optionally rearward. Preferably, the injection conduit is graduated so as to allow the nozzle to be positioned near the area to be treated in order to project the anti-corrosion composition in a localized manner onto the area to be treated predetermined during the examination step. 15 The second drainage hole may be temporarily plugged during the injection step. Alternatively, the second drainage hole can be connected in a watertight manner to a drain pipe to remove the residual composition from the tube.The drain pipe can be coupled to a pump to facilitate the removal of the residual composition. The residual composition is preferably collected in a reservoir. The residual composition can be filtered and recycled. Once the predetermined internal area has been treated, the process includes a drying stage, in which the drainage holes are temporarily sealed to prevent water infiltration into the tube during drying as described above. The drying time can be defined by the supplier of the anti-corrosion composition; preferably, the drying time is between 12 and 72 hours, more preferably between 24 and 48 hours, after which the drainage holes are unsealed to allow aeration inside the tube and prevent the accumulation of condensation. In each of the embodiments presented above, the process may further include a step of cleaning the inside of the tube, for example by means of injecting compressed air and / or a cleaning fluid.The cleaning fluid may comprise an aqueous solution containing an acid, for example, vinegar, citric acid, oxalic acid, or phosphoric acid. For example, the cleaning fluid BE2025 / 5090 16 may be a rust remover / phosphating agent comprising an aqueous solution containing 5% to 75% by weight of phosphoric acid and optionally containing wetting agents and surfactants. Preferably, the cleaning step includes a substep of temporarily sealing a drainage hole and a step of injecting the cleaning fluid into the tube. Preferably, the cleaning fluid is allowed to stand in the tube for a period of at least 30 seconds, preferably at least one minute, and more preferably at least 15 minutes. Preferably the cleaning step includes in addition a step of rinsing the cleaning fluid with water followed by a drying step. The drying can be accelerated 10 preferably with compressed air and / or heated air.The drying can be carried out by connecting a first drain hole to a first air injection line and connecting a second drain hole to a second pump line coupled to a pump. The anti-corrosion composition is preferably injected into the tube within a relatively short time after drying, for example a time less than 60 minutes, preferably less than 30 minutes, more preferably less than 15 minutes. A schematic representation of an embodiment of a device according to the invention and a schematic representation of a woven structure are shown in Figure 1. The woven structure 2 comprises a tube 1 which includes a first hole 3 positioned radially near a first axial end of the tube and a second hole 4 positioned radially near a second axial end of the tube. The anti-corrosion treatment device for a tube 1 of a woven structure 2 includes a first reservoir 5 for the anti-corrosion composition 6, a pump 7 coupled to the first reservoir 5 and an injection conduit 8 intended to be connected to the first hole 3 of the tube to be treated.The injection tube is advantageously flexible and includes walls and dimensions adapted to allow pumping of the anti-corrosion composition. The injection tube can be fixed on a reel so as to be able to wind and unwind the injection tube. The device includes a sealing means 10 intended to temporarily seal a second hole 4 in the tube to be treated. The sealing means 10 preferably includes a threaded fitting 30 equipped with a sealing gasket (not shown), the fitting being intended to be screwed tightly onto the second hole 4. The fitting is advantageously coupled to a valve 11. The valve is preferably connected to a drain pipe 12. The drain pipe 12 is advantageously flexible and includes walls and dimensions adapted to be able to drain the residual anti-corrosion composition 35 BE2025 / 5090 17 and any corrosion debris. The drain pipe 12 can be fixed on a reel 9 so as to be able to wind and unwind the drain pipe. The discharge pipe 12 can be coupled to a second pump (not shown).Advantageously, the discharge conduit 12 is provided to discharge the residual anti-corrosion composition 5 into a recovery tank 13. The recovery tank 13 advantageously includes a receiving opening equipped with a filter 14 to filter any corrosion debris exiting the tube and discharged through the discharge conduit 12. According to one embodiment of the device, a tank containing a cleaning solution 10 and a recovery tank for the cleaning solution can also be used. Figure 2 shows a schematic view of an alternative embodiment of the device according to the present invention. The device comprises a single reservoir 5 for the anti-corrosion composition 6, a pump 7 coupled to the reservoir, and an injection line 15 8 intended to be connected to a first hole 3 of a tube 1 to be treated. The reservoir 5 includes a receiving opening 14' fitted with a filter. The injection line 8 is advantageously flexible and comprises walls and dimensions adapted to allow pumping of the anti-corrosion composition 6.The injection conduit can be fixed on a reel 9 so as to be able to wind and unwind the injection conduit 20 8. The device includes a sealing means 10 for temporarily sealing a second hole 4 in the tube 1 to be treated. The sealing means 10 preferably includes a threaded fitting equipped with a sealing gasket (not shown), the fitting being intended to be screwed tightly onto the second hole 4. The fitting is advantageously 25 coupled to a valve 11. The valve 11 is preferably connected to a drain pipe 12. The drain pipe 12 is advantageously flexible and includes walls and dimensions adapted to allow the evacuation of the residual anti-corrosion composition and any corrosion debris. The drain pipe 12 can be fixed to a reel 9 so as to allow the drain pipe 30 12 to be wound and unwound. The discharge pipe 12 is connected to the receiving opening of the single tank 5 containing the anti-corrosion composition through the filter 14', so as to recycle the composition directly into a single tank 5.BE2025 / 5090 18 In any embodiment, the injection conduit can be configured to be inserted inside the tube and can include a nozzle like those described previously in relation to the.

Images