Galvanized part fitted with a multi-layer anti-slip coating, scaffolding element comprising such a part, and method for treating a galvanized part

Abstract

TITLE OF THE INVENTION: GALVANIZED PART WITH A MULTI-LAYER ANTI-SLIP COATING, SCAFFOLDING ELEMENT COMPRISING SUCH A PART AND METHOD FOR TREATMENT OF A GALVANIZED PART The galvanized part (100) is provided with a multi-layer anti-slip coating (105) comprising: - a first polymeric layer (110) comprising zinc particles (115) and adhered to the galvanized surface, - a second polymeric layer (120) comprising at least one compound from the polyepoxide family, adhered to the first polymeric layer, - solid particles (125) deposited on the second layer and adhered, and - a third polymeric layer (130) covering the solid particles and adhered to the second layer. The solid particles have an average anti-slip grain size such that the external surface of the third layer has reliefs (135) generated by these particles. Figure for the abbreviation: Figure 1

Description

Title of the invention: Galvanized part with a multi-layer anti-slip coating, scaffolding element comprising such a part, and method for treating a galvanized part Technical field of the invention

[0001] The present invention relates to a galvanized part with a non-slip multilayer coating, a scaffolding element comprising such a part, and a processing method for forming such a galvanized part with a non-slip multilayer coating. It is particularly applicable to the field of metal structures used for construction purposes, such as scaffolding or shoring. Prior art

[0002] In the field of construction using elements with a metallic surface, a large number of safety standards must be observed by users of these elements. Such elements include, for example, scaffolding, shoring, or ladders. Generally, these structural elements include galvanized steel parts, that is, parts that have been treated by a galvanizing process to coat their surface with a layer of zinc. This process aims to protect these parts from corrosion. These galvanized steel parts generally have a truncated cylindrical shape. However, these galvanized steel parts, also called galvanized parts, due to their shape and / or their relatively smooth surface, can cause a user to slip, particularly in humid or rainy conditions. A significant risk of falling is therefore present for a user of scaffolding, shoring, or ladders with a metallic surface.Given this danger, safety standards must be applied, including limiting the sliding properties of galvanized steel parts.

[0003] Prior art solutions describe the use of thick plastic covering objects, these objects having a shape complementary to the shape of the galvanized part. For example, when the galvanized part is a truncated cylinder, these plastic objects have a hollow cylindrical shape into which the galvanized part is inserted. These plastic objects have, for example, anti-slip longitudinal ridges and are attached to the galvanized part by a bolt or blind rivet system with a shear shank. However, such a plastic object, subjected to mechanical stresses when the galvanized part is loaded, detaches and tears away from the galvanized part. These plastic objects therefore have very limited strength. over time.

[0004] Another prior art solution describes the use of an anti-slip surface to be glued onto the galvanized part, also called a "sticker". However, these surfaces peel off and are therefore easily torn from the galvanized part.

[0005] Thus, no prior art solution allows a galvanized part to be covered by an anti-slip surface which not only has an anti-slip capacity in line with the prescribed safety constraints, but also a significant resistance to use and therefore a suitable durability.

[0006] Another prior art solution consists of modifying the surface of the galvanized part to give it anti-slip properties. However, such a modification has a significant negative impact on the mechanical properties of the part. Thus, such a solution is not suitable for parts used in metal structures implemented, for example, in the construction industry. Summary of the invention

[0007] The present invention aims to remedy all or part of these drawbacks.

[0008] The presence of a multi-layer, anti-slip coating on a galvanized part of the present invention increases the safety of users of metal structures incorporating such parts while offering significant resistance to mechanical stresses. Such a coating is therefore not subject to premature wear and retains its anti-slip properties for a long time. Furthermore, the coating has limited abrasive properties, so the part can be used directly by a user with bare hands without discomfort or injury caused by the coating's anti-slip surface. Such a part can be used in scaffolding components, these components thus complying with the safety standards required for their use.The process of treating a galvanized surface to cover it with a multi-layer anti-slip coating is easy to implement and produces a galvanized part with such a coating and offering the advantages mentioned above. Brief description of the figures

[0009] Other advantages, purposes and particular features of the invention will become apparent from the following non-limiting description of at least one particular embodiment of the device and method of the present invention, with reference to the accompanying drawings, in which:

[0010] [Fig. 1] schematically represents, in cross-section, a first particular embodiment of the galvanized part provided with an anti-slip coating which is the subject of the invention,

[0011] [Fig. 2] schematically represents, in side view and cross-section, the first embodiment of a particular embodiment of the galvanized part shown in [Fig. 1],

[0012] [Fig. 3] represents, schematically and in perspective, a first method of embodiment a particular type of shoring comprising at least one galvanized metal bar equipped with a non-slip coating, which is the subject of the invention, and

[0013] [Fig.4] represents, schematically and in the form of a flowchart, a succession a particular step in the process that is the subject of the invention. Description of the implementation methods

[0014] The present description is given by way of non-limiting agreement, each feature of an embodiment being able to be advantageously combined with any other feature of any other embodiment.

[0015] The expression "and / or", as used in this document and in the claims, shall be understood as meaning "either or both" of the elements thus joined, that is, elements that are present conjunctively in some cases and disjunctively in others. The multiple elements listed with "and / or" shall be interpreted in the same way, that is, "one or more" of the elements thus joined. Other elements may be present, other than the elements specifically identified by the "and / or" clause, whether or not they are related to those specifically identified elements.Thus, by way of non-limiting example, a reference to "A and / or B", when used in conjunction with an open language such as "including", may refer, in one embodiment, to A only (possibly including elements other than B); in another embodiment, to B only (possibly including elements other than A); in yet another embodiment, to A and B (possibly including other elements); etc.

[0016] As used in the description and in the claims, "or" should be understood as having the same meaning as "and / or" as defined above. For example, when separating elements in a list, "or" or "and / or" should be interpreted as inclusive, that is, the inclusion of at least one, but also more than one, of a number or list of elements, and optionally, of additional unlisted elements. Only terms clearly indicating the contrary, such as "only one of" or "exactly one of", or, when used in the claims, "consisting of", refer to the inclusion of only one element of a number or list of elements.

[0017] As used in this description and in the claims, the expression "at least one", with reference to a list of one or more elements, should be understood as meaning at least one element chosen from one or more elements in the list of elements, but not necessarily including at least one of Each element specifically listed in the list of elements, and not excluding any combination of elements in the list of elements. This definition also allows for the optional presence of elements other than those specifically identified in the list of elements to which the phrase "at least one" refers, whether or not they are related to those specifically identified elements.Thus, by way of non-limiting example, "at least one of A and B" (or, equivalently, "at least one of A or B", or, equivalently, "at least one of A and / or B") may refer, in one embodiment, to at least one, possibly including more than one, A, without B present (and possibly including elements other than B); in another embodiment, to at least one, possibly including more than one, B, without A present (and possibly including elements other than A); in yet another embodiment, to at least one, possibly including more than one, A, and at least one, possibly including more than one, B (and possibly including other elements); etc.

[0018] In the claims, as well as in the description below, all transitive expressions such as "comprising", "including", "carrying", "having", "containing", "implying", "holding", "composed of", and others, shall be understood as open, that is to say, as meaning including, but not limited to. Only the transitive expressions "consisting of" and "consisting essentially of" shall be understood as closed or semi-closed transitive expressions, respectively.

[0019] The following definitions are recalled here:

[0020] The term "multilayer coating" refers to a coating comprising at least two superimposed and bonded layers. It should be noted that, depending on the physicochemical affinity of one layer to the other, the interface between the two layers is composed of a mixture of compounds, each contained within one of the two layers; that is to say, the two layers are not strictly delimited at their interface. It should be noted that the term "multilayer coating" is a synonym for "multilayer film." Furthermore, a coating on a surface, for example, a galvanized surface, exhibits a significant physicochemical affinity with that surface. Such an affinity is notably responsible for the strong adhesion of the coating to the surface and is manifested, for example, by the presence of metallic and / or covalent bonds between the coating and the surface.

[0021] The term “adherent” refers to a layer having a sufficiently high physico-chemical affinity that it cannot be easily separated at the interface when mechanical stresses are applied.

[0022] The term “anti-slip” refers to a property that reduces the slipperiness of a surface, in other words, prevents slipping on a surface. In particular, a A user's slippage on a surface depends on the applied mechanical stresses that induce it. These stresses are, for example, a function of the user's mass, the soles of their shoes, and the weather conditions affecting the surface. A professional can define the necessary anti-slip properties for a surface, particularly in accordance with applicable safety standards.

[0023] The term “polymeric” refers to a layer comprising or formed by a polymer obtained, for example, after polymerization of a solution comprising monomers with or without a hardening agent, with or without an initiator, after drying of a solution comprising a mixture of polymers and / or monomers.

[0024] The term “solid particles” refers to macroscopic particles, for example, generally spherical and / or cubic and / or polyhedral in shape. A set of solid particles includes, for example, particles with an amorphous structure and / or particles with a crystalline structure. In particular, such solid particles have a predetermined average particle size according to their manufacture or origin of extraction.

[0025] The term "average particle size distribution" refers to a statistical distribution of the sizes of a set of particles. In the present description, the average particle size distribution is characteristic of the particle size.

[0026] It should be noted from the outset that the figures are not to scale.

[0027] Figures 1 and 2, which are not to scale, show a schematic view of an embodiment of the galvanized part 100 that is the subject of the present invention. Figures 1 and 2 show that the galvanized part 100 is provided with a multi-layer, anti-slip coating 105. It should be noted that the coating 105 comprises: - a first polymeric layer 110 adhering to the galvanized surface, - a second polymeric layer 120 adhered to the first polymeric layer 110, - solid particles 125 deposited on the second layer 120 and adherent, and - a third polymeric layer 130 covering the solid particles 125 and adhering to the second layer 120.

[0028] It is noted, in [Fig. 1], that the average thickness of the polymeric coating is represented by a double arrow.

[0029] The coating 105 of a galvanized part 100 is used as an anti-slip coating. In other words, the galvanized part 100 equipped with a multi-layer anti-slip coating is used as an anti-slip galvanized part 100.

[0030] In embodiments, the multilayer coating 105 has an average thickness of at least one millimeter.

[0031] In embodiments, the average thickness of the coating 105 is included between 0.5 millimeters and two millimeters, preferably between one millimeter and two millimeters and more preferably between one millimeter and 1.5 millimeters.

[0032] First polymer layer

[0033] It is noted that the first polymeric layer 110 comprises zinc particles 115. The presence of zinc particles 115 increases the physicochemical affinity of the first polymeric layer 110 with the galvanized surface. Thus, the first layer 110 exhibits good adhesion to the galvanized surface of the galvanized part 100.

[0034] In embodiments, the mass percentage of zinc, relative to the total mass of the first polymeric layer, is between 20% and 100%.

[0035] In some embodiments, the zinc particles are at least partially in the form of zinc phosphate.

[0036] In embodiments, the first polymeric layer 110 comprises at least one compound from the polyepoxide family.

[0037] In some embodiments, the first polymeric layer 110 is formed after the application of a film-forming solution, corresponding to a primer solution: - containing zinc particles and - being described as a "two-component epoxy-polyamide / amine" solution, meaning it contains at least one epoxy resin and a hardening agent, also called a crosslinking agent, belonging to the amide or amine family. It should be noted that these two components are preferably mixed before the solution is applied to the galvanized surface.

[0038] In variants, the film-forming aqueous solution is said to be "single-component", that is to say that such a solution is not formed by mixing two components, including a hardener, before application to the galvanized surface.

[0039] Preferably, the film-forming solution is a solution comprising: - zinc particles with at least 80% dry residue mass and - dual-component epoxy-polyamide.

[0040] In particular, such a solution generates a first polymeric layer 110 of adhesion to the galvanized surface, stable and exhibiting adequate hardness.

[0041] In some embodiments, the film-forming solution is a three-component paint based on epoxy and zinc powder. For example, this solution provides corrosion protection with a zinc metallic concentration of 95%.

[0042] Second polymer layer

[0043] It is noted that the second polymeric layer 120 comprises at least one compound from the polyepoxide family. In particular, the second layer 120 exhibits a physicochemical affinity with the first layer 110, ensuring good adhesion. of the two layers, 110 and 120, between them.

[0044] Moreover, the presence of the first layer 110 ensures adhesion of the second layer 120 since the second layer 120 does not have suitable adhesion to the so-called "raw" surface, i.e. directly to the galvanized steel surface without undercoat, of the galvanized part 100.

[0045] In some embodiments, the second polymeric layer 120 is formed after the application of a film-forming solution, which is described as a "two-component epoxy-polyamide / amine" solution and preferably an epoxy-polyamide solution. Such a solution comprises, in particular, at least one epoxy resin and a hardening agent belonging to the amide or amine family. It should be noted that these two components are preferably mixed before the solution is applied to the first layer 110.

[0046] In some embodiments, the film-forming solution is a two-component epoxy-polyamide solution. Preferably, the first layer 110 is made from a solution comprising: - zinc particles with at least 80% dry residue mass and - dual-component epoxy-polyamide and the second layer 120 is derived from a dual-component epoxy-polyamide solution.

[0047] In these embodiments, an optimal physico-chemical affinity is present between the first layer 110 and the second layer 120.

[0048] This film-forming solution is, for example, a two-component epoxy paint to be mixed at the time of use.

[0049] Solid particles

[0050] It is noted that the solid particles 125 are adherent to the second layer 120, that is to say that such particles are strongly attached to the second layer 120. In particular, the set of solid particles 125 forms a layer of solid particles on at least a portion of the second polymeric layer 120.

[0051] The solid particles 125 have an average anti-slip particle size such that the external surface of the third layer 130 has raised features 135 generated by these particles. The solid particles 125 correspond to any granular compounds creating significant asperities to give the coating 105 anti-slip properties. Such asperities are generated by the raised features 135. In particular, the solid particles 125 are coated on both sides respectively by the second layer 120 and by the third layer 130.

[0052] In embodiments such as that shown in Figures 1 and 2, the solid particles 125 are distributed at least partially over the second layer 120, that is to say that the solid particles 125 are present only on a delimited surface of the second layer.

[0053] In these embodiments, the partially distributed solid particles 125 are preferably present under a delimited surface of the third layer 130 which is in contact with the hands and / or shoes of a user during use in order to prevent slipping.

[0054] In variants (not shown), the solid particles 125 are distributed over the entire second layer 120. In other words, the solid particles 125, fully distributed over the second layer 120, are present under the entire surface of the third layer 130.

[0055] In embodiments, the anti-slip solid particles 125 of the coating 105 have an average particle size of at least 0.5 millimeter.

[0056] In some embodiments, the anti-slip solid particles 125 of the coating 105 are inorganic and contain silica. Preferably, the solid particles 125 are sand particles.

[0057] In some embodiments, the solid particles 125 are sand particles and have an average particle size of at least 0.5 millimeters. For example, it is silica sand, intended for industrial flooring. Non-slip, it is applied by sprinkling.

[0058] Third polymer layer

[0059] It should be noted that the third polymeric layer 130 covers the solid particles 125. In other words, the solid particles are not in direct contact with the user's shoes and / or hands when using the galvanized part 100. It should also be noted that the third polymeric layer 130 completes the anchoring and thus the adhesion of the solid particles 125 within the coating. In particular, the third layer 130 protects the solid particles 125 by coating them, thereby limiting their erosion and detachment when the anti-slip coating is subjected to stress.

[0060] Preferably, the third layer 130 has a physico-chemical affinity with the second layer 120 ensuring good adhesion of the two layers, 120 and 130, to each other.

[0061] In some embodiments, the third polymeric layer 130 is formed after the application of a film-forming solution, which is described as a "two-component epoxy-polyamide / amine" solution and preferably an epoxy-polyamide solution. Such a solution comprises, in particular, at least one epoxy resin and a hardening agent belonging to the amide or amine family. It should be noted that these two components are preferably mixed before the solution is applied to the solid particles 125 and the second layer 120.

[0062] In some embodiments, the film-forming solution is a two-component epoxy-polyamide solution. Preferably, the first layer 110 is made from a solution comprising: - zinc particles with at least 80% dry residue mass and - dual-component epoxy-polyamide

[0063] the second layer 120 is made from a two-component epoxy-polyamide solution and

[0064] the third layer 130 is also derived from a two-component epoxy-polyamide solution.

[0065] In these embodiments, an optimal physico-chemical affinity is present between the second layer 120 and the third layer 130. In these embodiments, the solid particles 125 are preferably sand particles.

[0066] This film-forming solution is, for example, a two-component epoxy paint to be mixed at the time of use.

[0067] Coloring agent

[0068] In embodiments, the coating 105 comprises a colouring compound incorporated into at least one of the polymer layers, 110, 120 and / or 130.

[0069] Preferably, such a colorant is present in a film-forming liquid solution that forms the second layer 120 and / or the third layer 130. Such a colorant compound is, for example, a colorant used for coloring epoxy resin known to those skilled in the art. For example, such a colorant is present in a solution that generates the second layer 120 and the third layer 130.

[0070] For example, such a dye is responsible for coloring the coating 105 blue or red.

[0071] Scaffolding element

[0072] In embodiments such as that shown in [Fig.2], part 100 constitutes a galvanized metal bar with a non-slip multi-layer coating 105.

[0073] Figure 3, not to scale, shows a schematic view of an embodiment of a scaffolding element 200 of the present invention. In particular, the scaffolding element 200 comprises a set of rungs 100, each rung 100 being provided with a multi-layer, anti-slip coating 105. Preferably, the rung 100 is in the shape of a truncated cylinder, and in particular, in the shape of a tube.

[0074] It is noted, in [Fig. 3], that the scaffolding element 200 of scaffolding 205 is a ladder tallique to access, during an ascent by ladder 200, at least one floor 206 or platform 206 of scaffolding 205.

[0075] In embodiments such as that shown in [Fig.3], the scaffolding 205, comprising the element 200, is a shoring tower 205.

[0076] Processing method

[0077] Figure 4 shows a schematic view of one embodiment of the process 300, the object of the present invention. Process 300 is a treatment process for forming a galvanized part with a non-slip, multi-layer coating. Process 300 comprises: - a first application step 305 of a first liquid composition onto the galvanized part, - a second application step 310 of a second liquid composition onto the first polymeric layer, - a step 315 of depositing solid particles on the second layer and - a third step 320 of applying a third liquid composition on the solid particles.

[0078] The first liquid composition comprises zinc particles and is film-forming. During the first application step 305, the first liquid composition forms a first polymeric layer comprising zinc particles on the galvanized part.

[0079] In embodiments such as that shown in [Fig. 4], the first polymeric layer is generated downstream of a first drying step 306 of the first liquid composition applied to the galvanized surface. Preferably, the first liquid solution is a solution comprising: - zinc particles with at least 80% dry residue mass and - dual-component epoxy-polyamide.

[0080] During the second application step 310, the second liquid composition forms a second polymeric layer on top of and adheres to the first polymeric layer. It should be noted that the second polymeric layer comprises at least one compound from the polyepoxide family. Preferably, the second polymeric layer is derived from a second liquid solution, which is a two-component epoxy-polyamide solution.

[0081] In embodiments such as that shown in [Fig. 4], no drying step is present between the second application step 310 of the second liquid composition and the deposition step 315 of the solid particles. Thus, the adhesion of the solid particles to the second layer is increased since such particles will be at least partially integrated into the second applied liquid solution, and therefore ultimately incorporated at least partially into the polymer network constituting the second layer.

[0082] During the deposition step 315, the solid particles are deposited at least partially onto the second layer. It is noted that the solid particles adhere to the second layer. For example, the solid particles are sprinkled onto the second applied liquid solution, which is not completely dry.

[0083] Preferably, the deposited solid particles comprise at least partially sand. More preferably, the deposited solid particles are made up of sand.

[0084] In embodiments such as that shown in [Fig. 4], the process 300 includes a second drying step 316 of the second liquid composition applied and at least partially covered with solid particles. It should be noted that, in these embodiments, the second polymeric layer is generated downstream of the second drying step 316.

[0085] During the third application step 320, the third liquid composition forms a third polymeric layer on the second polymeric layer, which is at least partially covered with solid particles. In other words, the applied third liquid composition covers the solid particles. The third applied liquid composition forms a third polymeric layer covering the solid particles, the third layer being adherent to the second layer.

[0086] Preferably, the third polymeric layer comprises at least one compound from the polyepoxide family. More preferably, the third polymeric layer is derived from a third liquid solution, which is a two-component epoxy-polyamide solution. Even more preferably, the second and third liquid solutions are identical and are two-component epoxy-polyamide solutions.

[0087] In embodiments such as that shown in [Fig. 4], the process 300 includes a third drying step 321 of the third applied liquid composition. It should be noted that, in these embodiments, the third polymer layer is generated downstream of the third drying step 321.

[0088] In embodiments such as that shown in [Fig.4], the anti-slip multilayer coating is formed downstream of the third drying step 321. In such a coating, the solid particles have an average anti-slip grain size such that the external surface of the third layer has reliefs generated by these particles.

[0089] In embodiments, during application steps 305, 310 and / or 320, the liquid composition is sprayed using a gun.

[0090] In other embodiments, during the application steps 305, 310 and / or 320, the liquid composition is applied using a brush.

[0091] In variants, during application steps 305, 310 and / or 320, the galvanized part is immersed in a container containing the liquid composition and then drained.

[0092] In embodiments, the surface treatment process of a galvanized tube generates a durable anti-slip coating on ladder rungs of a shoring tower.

[0093] Preferably, the steps of process 300 can be implemented to obtain the different embodiments described above for the galvanized part 100 provided with a non-slip multi-layer coating 105.

[0094] Example of implementation

[0095] An example of implementing a process of the invention is described below.

[0096] First, a first liquid composition comprising: - zinc particles with at least 80% dry residue mass and - A two-component epoxy-polyamide coating is applied to a galvanized metal bar 100. A first drying step of 15 minutes is then carried out to form a first polymeric layer 110.

[0097] Next, a second two-component epoxy-polyamide liquid composition containing a red dye is applied to the first polymer layer 110. Solid sand particles 125 are sprinkled onto the undried second liquid composition. Specifically, the sand is sprinkled over the upper half of the perimeter, thus partially covering the surface formed by the second composition. A second drying step of the second liquid composition, lasting 24 hours, is then carried out to form a second polymer layer 120 covered with solid particles 125.

[0098] Finally, a third two-component epoxy-polyamide liquid composition containing a red dye is applied to the second polymeric layer 120 covered with solid particles 125. A third drying step lasting 24 hours of the third liquid composition is then carried out to form a third polymeric layer 130 covering the solid particles 125. A non-slip coating 105 covering a galvanized bar 100 is obtained at the end of this third drying step.

[0099] Advantages provided

[0100] According to a first aspect, the present invention relates to a galvanized part provided with a non-slip multilayer coating, this coating comprising: - a first polymeric layer containing zinc particles and adhering to the galvanized surface, - a second polymeric layer comprising at least one compound from the polyepoxide family, adhering to the first polymeric layer, - solid particles deposited on the second layer and adhering, and - a third polymeric layer covering the solid particles and adhering to the second layer,

[0101] solid particles having an average non-slip grain size such that the external surface of the third layer has reliefs generated by these particles.

[0102] Thanks to these features, the anti-slip coating gives the galvanized part an anti-slip property suitable for its intended use. In particular, such a part meets the safety objectives sought by the inventor, for example, in metal structures in the building construction sector.

[0103] Furthermore, the anti-slip coating exhibits optimal adhesion to the galvanized part and significant intrinsic strength. Such a film is therefore resistant to the mechanical stresses exerted, for example, during the use of the galvanized part in a metal structure on a construction site. Thus, satisfactory durability of the coating on the surface of the metal part is achieved.

[0104] Finally, the anti-slip coating has limited abrasive properties due to the presence of the third layer covering the anti-slip texture. Thus, the coating is compatible with a user's bare hand grip without causing significant discomfort, punctures, or injuries.

[0105] In optional embodiments, the non-slip solid particles of the coating have an average particle size of at least greater than 0.5 millimeter.

[0106] Thanks to these features, such an average particle size gives the coating optimal anti-slip properties. This enhances user safety since the risk of slipping is greatly reduced.

[0107] In optional embodiments, the non-slip solid particles of the coating are inorganic and comprise silica.

[0108] Thanks to these features, the particles exhibit adequate strength and therefore significant resistance to mechanical wear. Furthermore, such particles are inert with respect to the coating compounds and are also chemically stable, so their degradation over time is very limited.

[0109] In optional embodiments, the multilayer coating has an average thickness of at least one millimeter.

[0110] Thanks to these provisions, the coating has optimal durability, i.e. limited wear and detachment of the galvanized part while retaining its anti-slip properties.

[0111] In optional embodiments, the coating further comprises a colouring compound incorporated into at least one of the polymer layers.

[0112] Thanks to these features, the coating is visually identifiable by a user. The user can therefore easily identify a galvanized part with the anti-slip coating. In particular, the use of such a part is facilitated since the user will position their feet and hands according to the presence of the colored anti-slip coating, for example, when climbing a galvanized structure. Thus, user safety is enhanced.

[0113] In optional embodiments, the part of the present invention constitutes a galvanized metal bar provided with a non-slip multi-layer coating.

[0114] Thanks to these features, the galvanized bar with a non-slip coating is particularly suitable for preventing the user from slipping when supported by the bar, for example, during a climb. Furthermore, when a bar is a truncated cylinder with a rounded contact surface with the user, which is therefore prone to slipping, the non-slip coating is adapted to the shape of the bar and thus effectively limits such slippage.

[0115] According to a second aspect, the present invention relates to a scaffolding element or a metal ladder comprising at least one rung which is the subject of the present invention.

[0116] Thanks to these provisions, the safety of metal structures with a rung equipped with an anti-slip coating is enhanced. In particular, such structures correspond to scaffolding, shoring, or metal ladders, with heights ranging from a few meters to several tens of meters and subject to significant mechanical stresses.

[0117] Furthermore, the purposes, advantages and particular characteristics of the scaffolding element or ladder which are the subject of the present invention being similar to those of the metal part and bar which are the subject of the present invention, they are not recalled here.

[0118] According to a third aspect, the present invention relates to the use of a coating of a galvanized part which is the subject of the present invention, as an anti-slip coating.

[0119] Moreover, the purposes, advantages and particular characteristics of the use which is the subject of the present invention being similar to those of the part which is the subject of the present invention, they are not recalled here.

[0120] According to a fourth aspect, the present invention relates to a treatment method for forming a galvanized part with a non-slip multilayer coating, which comprises: - a first step of applying a first liquid composition to the galvanized part to form a first polymeric layer containing zinc particles, - a second step of applying a second liquid composition onto the first polymeric layer to form a second polymeric layer comprising at least one compound from the polyepoxide family, the second layer being adherent to the first polymeric layer, - a step of depositing solid particles onto the second layer, the solid particles being adherent to the second layer, and - a third step of applying a third liquid composition to form a third polymeric coating layer over the solid particles, the third layer being adherent to the second layer

[0121] solid particles having an average non-slip grain size such that the external surface of the third layer has reliefs generated by these particles.

[0122] Thanks to these arrangements, a galvanized part with an anti-slip coating can easily be obtained.

[0123] Furthermore, the aims, advantages and particular characteristics of the process which is the subject of the present invention being similar to those of the part which is the subject of the present invention, they are not recalled here.

[0124] In optional embodiments, no drying step is present between the second step of applying the second liquid composition and the step of depositing the solid particles.

[0125] Thanks to these arrangements, optimal incorporation and adhesion of the solid particles to the surface of the second polymeric layer is obtained.

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9. Claims Galvanized part (100) provided with a non-slip multi-layer coating (105), characterized in that this coating comprises: - a first polymeric layer (110) comprising zinc particles (115) and adhering to the galvanized surface, - a second polymeric layer (120) comprising at least one compound from the polyepoxide family, adhering to the first polymeric layer, - solid particles (125) deposited on the second layer and adherent, and - a third polymeric layer (130) covering the solid particles and adhering to the second layer, the solid particles having an average non-slip granulometry such that the external surface of the third layer has reliefs (135) generated by these particles. Part (100) according to claim 1, in which the non-slip solid particles (125) of the coating (105) have an average particle size at least equal to 0.5 millimeters. Part (100) according to one of claims 1 or 2, in which the non-slip solid particles (125) of the coating (105) are inorganic and comprise silica. Part (100) according to one of claims 1 to 3, in which the multilayer coating (105) has an average thickness at least equal to one millimeter. Part (100) according to one of claims 1 to 4, in which the coating (105) further comprises a coloring compound incorporated into at least one of the polymeric layers (110, 120, 130). Part (100) according to one of claims 1 to 5, constituting a galvanized metal bar (100) provided with a non-slip multi-layer coating (105). Element (200) of scaffolding (205) or metal ladder comprising at least one rung (100) according to claim 6. Use of a coating (105) of a galvanized part (100) according to one of claims 1 to 6, as a non-slip coating. Treatment method (300) for forming a galvanized part provided with a non-slip multi-layer coating, characterized in that it comprises: - a first step of applying (305) a first liquid composition to the galvanized part to form a first polymeric layer comprising zinc particles, - a second step of applying (310) a second liquid composition to the first polymeric layer and to form a second polymeric layer comprising at least one compound from the polyepoxide family, the second layer being adherent to the first polymeric layer, - a step of depositing (315) solid particles on the second layer, the solid particles being adherent to the second layer, and - a third step of applying (320) a third liquid composition for forming a third polymeric layer covering the solid particles, the third layer being adherent to the second layer solid particles having an average non-slip granulometry such that the external surface of the third layer has reliefs generated by these particles.

10. A method (300) of treatment according to claim 9, wherein no drying step is present between the second step of applying (310) the second liquid composition and the step of depositing (315) the solid particles.

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