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 raised features (135) generated by these particles. Figure for the abbreviation: Figure 1

Description

Title of the invention: GALVANIZED PART PROVIDED WITH A NON-SLIP MULTILAYER 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 provided with a non-slip multi-layer coating, a scaffolding element comprising such a part and a treatment method for forming such a galvanized part provided with a non-slip multi-layer coating. It applies, in particular, to the field of metal structures used for construction purposes such as scaffolding or shoring. State of the art

[0002] In the field of construction using elements having a metallic structure, a large number of safety standards must be respected for the users of these elements. Such elements are, for example, scaffolding, shoring or ladders. Generally speaking, these structural elements comprise parts made of galvanized steel, that is to say parts having been treated by a galvanization process in order to cover their surface with a layer of zinc. Such a process aims to protect these parts from corrosion. These galvanized steel parts generally have the shape of a truncated cylinder of revolution. However, these galvanized steel parts, also called galvanized parts, by their shape and / or their substantially smooth surface, induce a user to slip, particularly in the event of humidity or rain. A significant danger of falling is therefore present for a user of scaffolding, shoring or ladders comprising.In view of such a danger, safety standards must be applied and in particular impose the limitation of the sliding properties of galvanized steel parts.

[0003] Solutions of the prior art 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, non-slip longitudinal reliefs and are fixed to the galvanized part by a bolt or blind rivet system with breakaway stem. However, such a plastic object subjected to mechanical stresses when the galvanized part is stressed becomes detached and torn from the galvanized part. These plastic objects therefore have very limited resistance. in time.

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

[0005] Thus, no prior art solution makes it possible to cover a galvanized part with a non-slip surface having not only a non-slip capacity in line with the prescribed safety constraints, but also significant resistance to use and therefore suitable durability.

[0006] Another solution of the prior art consists in modifying the surface of the galvanized part in order 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 field. Summary of the invention

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

[0008] The presence of a non-slip multi-layer coating on a galvanized part provided with the subject of the present invention increases the safety of users of metal structures comprising such parts while presenting significant resistance to mechanical stresses. Such a coating is therefore not worn prematurely and retains its non-slip properties for a long time. Furthermore, the coating has a limited abrasive property, the part can therefore be used directly with bare hands by a user without discomfort or injury being caused by the non-slip reliefs of the coating. Such a part can be used in scaffolding elements, these elements therefore complying with the safety standards imposed for their use.The process of treating a galvanized surface to cover it with a non-slip multi-layer coating is easy to implement and forms a galvanized part provided with such a coating and having the advantages mentioned above. Brief description of the figures

[0009] Other advantages, aims and particular characteristics of the invention will emerge from the following non-limiting description of at least one particular embodiment of the device and method which are the subject of the present invention, with reference to the appended drawings, in which:

[0010] [Fig.l] represents, schematically and in section, a first particular embodiment of the galvanized part provided with a non-slip coating which is the subject of the invention,

[0011] [Fig.2] represents, schematically, in side view and in section, the first embodiment particular realization of the galvanized part represented in [Fig.l],

[0012] [Fig.3] represents, schematically and in perspective, a first mode of realization particular use of a shoring comprising at least one galvanized metal bar provided 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 of particular steps of the method which is the subject of the invention. Description of the embodiments

[0014] The present description is given without limitation, each characteristic of an embodiment being able to be combined with any other characteristic of any other embodiment in an advantageous manner.

[0015] The expression "and / or", as used herein and in the claims, is to be understood to mean "either or both" of the elements so conjoined, i.e., elements which are present conjunctively in some cases and disjunctively in other cases. Multiple elements listed with "and / or" are to be interpreted in the same way, i.e., "one or more" of the elements so conjoined. Other elements may optionally be present, other than the elements specifically identified by the "and / or" clause, whether or not they are related to these specifically identified elements.Thus, by way of non-limiting example, a reference to "A and / or B", when used in conjunction with open language such as "comprising" may refer, in one embodiment, to A only (optionally including elements other than B); in another embodiment, to B only (optionally including elements other than A); in yet another embodiment, to both A and B (optionally including other elements); etc.

[0016] As used in the description and in the claims, "or" is to 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" is to be interpreted as inclusive, i.e., the inclusion of at least one, but also more than one, number or list of elements, and, optionally, additional elements not listed. 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 specification and in the claims, the expression "at least one", with reference to a list of one or more elements, should be understood to mean at least one element selected 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 the specifically identified elements in the list of elements to which the phrase "at least one" refers, whether or not 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, optionally including more than one, A, without B present (and optionally including elements other than B); in another embodiment, to at least one, optionally including more than one, B, without A present (and optionally including elements other than A); in yet another embodiment, to at least one, optionally including more than one, A, and at least one, optionally including more than one, B (and optionally including other elements); etc.

[0018] In the claims, as well as in the description below, all transitional expressions such as "comprising", "including", "carrying", "having", "containing", "involving", "holding", "composed of", and the like, are to be understood as being open, i.e., as meaning including, but not limited to. Only the transitional expressions "consisting of" and "consisting essentially of" are to be understood as closed or semi-closed transitional expressions, respectively.

[0019] We recall here the following definitions:

[0020] The terms "multilayer coating" refer to a coating comprising at least two layers superimposed on each other and adhering. It is noted that, depending on the physicochemical affinity of one layer with respect to the other, the interface between the two layers consists of a mixture of compounds each included in one of the two layers, that is to say that the two layers are not strictly delimited at their interface. It is noted that the term multilayer coating is a synonym for multilayer film. Furthermore, a coating present on a surface, for example galvanized, has a significant physicochemical affinity with this surface. Such an affinity is in particular the origin of the strong adhesion of the coating with the surface and is materialized, 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 physicochemical affinity, in particular, so as not to be easily separated at their interface when mechanical stresses are applied.

[0022] The term "non-slip" refers to a property that reduces the slipperiness of a surface, in other words, prevents skidding on a surface. In particular, a The slippage of a user on a surface depends on the mechanical constraints applied inducing such slippage, these constraints being, for example, a function of the mass of the user, the soles of his shoes and the weather conditions which condition the surface. The person skilled in the art knows how to define the non-slip properties necessary for a surface according, in particular, to the safety standards to be respected.

[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, of generally spherical and / or cubic and / or polyhedral shape. A set of solid particles comprises, for example, particles having an amorphous structure and / or particles having a crystalline structure. In particular, such solid particles have a predetermined average particle size depending on their manufacture or their extraction origin.

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

[0026] It should be noted from now on 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 which is the subject of the present invention. Figures 1 and 2 show that the galvanized part 100 is provided with a non-slip multi-layer coating 105. Note that the coating 105 comprises: - a first polymeric layer 110 adhering to the galvanized surface, - a second polymeric layer 120 adhering to the first polymeric layer 110, - solid particles 125 deposited on the second layer 120 and adhering, 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 a non-slip coating. In other words, the galvanized part 100 provided with a non-slip multi-layer coating is used as a non-slip galvanized part 100.

[0030] In embodiments, the multi-layer coating 105 has an average thickness at least equal to one millimeter.

[0031] In embodiments, the average thickness of the coating 105 is comprised 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 polymeric layer

[0033] It is noted that the first polymeric layer 110 comprises zinc particles. 115. The presence of the zinc particles 115 increases the physicochemical affinity of the first polymeric layer 110 with the galvanized surface. Thus, the first layer 110 has 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 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 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 called "double epoxy-polyamide / amine" components, i.e. comprising 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 applying the solution 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 of at least 80% by mass of dry residue and - dual-component epoxy-polyamide.

[0040] In particular, such a solution generates a first polymeric layer 110 for bonding to the galvanized surface, which is stable and has adequate hardness.

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

[0042] Second polymeric 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 has a physicochemical affinity with the first layer 110 ensuring good adhesion. of the two layers, 110 and 120, between them.

[0044] Furthermore, the presence of the first layer 110 ensures adhesion of the second layer 120 since the second layer 120 does not have adhesion adapted to the so-called “raw” surface, that is to say directly to the surface of galvanized steel without undercoat, of the galvanized part 100.

[0045] In embodiments, the second polymeric layer 120 is formed after the application of a film-forming solution which is called “double epoxy-polyamide / amine” and preferably epoxy-polyamide. Such a solution notably comprises at least one epoxy resin and a hardening agent belonging to the family of amides or amines. It is noted that these two components are preferably mixed before the application of the solution to the first layer 110.

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

[0047] In these embodiments, an optimal physicochemical 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 non-slip granulometry such that the external surface of the third layer 130 has reliefs 135 generated by these particles. The solid particles 125 correspond to any granular compounds creating significant asperities to give the coating 105 non-slip properties. Such asperities are generated by the reliefs 135. In particular, the solid particles 125 are coated on either side 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 on the second layer 120, that is to say that the solid particles 125 are only present on a delimited surface of the second layer.

[0053] In these embodiments, the partially distributed solid particles 125 are preferentially 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 entirety of the second layer 120. In other words, the solid particles 125, entirely distributed over the second layer 120, are present under the entirety of the surface of the third layer 130.

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

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

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

[0058] Third polymeric layer

[0059] It is noted that the third polymeric layer 130 covers the solid particles 125. In other words, the solid particles are not directly in contact with the shoes and / or the hands of the user when using the galvanized part 100. It is also noted that the third polymeric layer 130 finalizes the inking and therefore the adhesion of the solid particles 125 within the coating. In particular, the third layer 130 protects the solid particles 125 by coating them, thus limiting their erosion and their detachment when the non-slip coating is stressed.

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

[0061] In embodiments, the third polymeric layer 130 is formed after the application of a film-forming solution which is called “double epoxy-polyamide / amine” and preferably epoxy-polyamide. Such a solution notably comprises at least one epoxy resin and a hardening agent belonging to the family of amides or amines. It is noted that these two components are preferably mixed before the application of the solution to the assembly of solid particles 125 and second layer 120.

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

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

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

[0065] In these embodiments, an optimal physicochemical 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 coloring compound incorporated into at least one of the polymeric layers, 110, 120 and / or 130.

[0069] Preferably, such a colorant is present in a film-forming liquid solution forming the second layer 120 and / or the third layer 130. Such a coloring 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 generating the second layer 120 and the third layer 130.

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

[0071] Scaffolding element

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

[0073] [Fig. 3], which is not to scale, shows a schematic view of an embodiment of a scaffolding element 200 205 which is the subject of the present invention. In particular, the scaffolding element 200 205 comprises a set of bars 100, each bar 100 being provided with a non-slip multi-layer coating 105. Preferably, the bar 100 is in the form of a truncated cylinder and in particular in the form of a tube.

[0074] It is noted, in [Fig.3], that the element 200 of scaffolding 205 is a ladder me metal for accessing, when climbing the ladder 200, at least one floor 206 or platform 206 of the 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] Treatment method

[0077] [Fig.4] shows a schematic view of an embodiment of the method 300 object of the present invention. The method 300 is a treatment method for forming a galvanized part provided with a non-slip multi-layer coating. The method 300 comprises: - a first step of applying 305 a first liquid composition to the galvanized part, - a second step 310 of applying a second liquid composition to 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 to 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 of at least 80% by mass of dry residue and - dual-component epoxy-polyamide.

[0080] During the second application step 310, the second liquid composition forms a second polymeric layer on the first polymeric layer and adheres to the first layer. It is 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 dual-component epoxy-polyamide solution.

[0081] In embodiments, such as that shown in [Fig.4], no drying step is present between the second step 310 of applying the second liquid composition and the step 315 of depositing 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 liquid solution applied, 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 on the second layer. It is noted that the solid particles are adherent to the second layer. For example, the solid particles are sprinkled on the second applied liquid solution which is not completely dry.

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

[0084] In embodiments, such as that shown in [Fig.4], the method 300 comprises a second drying step 316 of the second liquid composition applied and at least partially covered with solid particles. It is 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 at least partially covered with solid particles. In other words, the third liquid composition applied covers the solid particles. The third liquid composition applied 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 dual-component epoxy-polyamide solution. Even more preferably, the second liquid solution and the third liquid solution are identical and are a dual-component epoxy-polyamide solution.

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

[0088] In embodiments, such as that shown in [Fig.4], the non-slip multi-layer coating is formed downstream of the third drying step 321. In such a coating, the solid particles have a non-slip average particle 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 the 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 method of surface treating a galvanized tube generates a durable non-slip coating on ladder rungs of a shoring tower.

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

[0094] Example of implementation

[0095] An example of implementation of a method which is the subject of the invention is described below.

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

[0097] Next, a second liquid composition with dual epoxy-polyamide components comprising a red colorant is applied to the first polymeric layer 110. Solid particles 125 of sand are sprinkled on the second undried liquid composition. In particular, the sand is sprinkled on an upper half-perimeter, therefore partially on the surface formed by the second composition. A second drying step for 24 hours of the second liquid composition is then carried out to form a second polymeric layer 120 covered with solid particles 125.

[0098] Finally, a third liquid composition with two epoxy-polyamide components comprising a red colorant is applied to the second polymeric layer 120 covered with solid particles 125. A third drying step of the third liquid composition for 24 hours 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] Benefits provided

[0100] According to a first aspect, the present invention relates to a galvanized part provided with a non-slip multi-layer coating, this coating comprising: - a first polymeric layer comprising 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 adherent, and - a third polymeric layer covering the solid particles and adhering to the second layer,

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

[0102] Thanks to these provisions, the non-slip coating gives the galvanized part a non-slip property suitable for the intended use. In particular, such a part is in line with the safety objectives sought by the inventor, for example, in metal structures in the field of building construction.

[0103] Furthermore, the non-slip coating has optimal adhesion to the galvanized part and significant intrinsic strength. Such a film is therefore resistant to mechanical stresses exerted, for example, when using 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 obtained.

[0104] Finally, the non-slip coating has abrasive properties limited by the presence of the third layer covering the non-slip reliefs. Thus, the coating is compatible with a user gripping it with their bare hands, without causing significant discomfort, punctures or injuries.

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

[0106] Thanks to these provisions, such an average grain size gives the coating an optimal anti-slip property. Thus, the safety of a user is reinforced since the risks of slipping are very limited.

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

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

[0109] In optional embodiments, the multi-layer 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 non-slip properties.

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

[0112] Thanks to these provisions, the coating can be visually identified by a user. The user can therefore easily identify a galvanized part comprising the non-slip coating. In particular, the use of such a part is facilitated since the user will place his feet and hands according to the presence of the colored non-slip coating, for example, when climbing a galvanized structure. Thus, the safety of the user is reinforced.

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

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

[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 comprising a bar provided with a non-slip coating is reinforced. In particular, such structures correspond to scaffolding, shoring or a metal ladder, having heights of a few meters to a few tens of meters and subject to significant mechanical constraints.

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

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

[0119] Furthermore, the aims, 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 provided with a non-slip multi-layer coating, which comprises: - a first step of applying a first liquid composition to the galvanized part to form a first polymeric layer comprising zinc particles, - a second step of applying 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 solid particles on 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 layer covering the solid particles, the third layer being adherent to the second layer

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

[0122] Thanks to these provisions, a galvanized part with a non-slip coating is easily obtained.

[0123] Furthermore, the aims, advantages and particular characteristics of the method 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 provisions, optimal incorporation and adhesion of the solid particles to the surface of the second polymeric layer is obtained.

Claims

Claims

1. 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 adhering, 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.

2. 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.

3. 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.

4. 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.

5. 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).

6. Part (100) according to one of claims 1 to 5, in which the zinc particles (115) of the first polymeric layer are at least partially in the form of zinc phosphate.

7. Part (100) according to one of claims 1 to 6, in which the zinc particles (115) represent at least 80% by mass of dry residue of the first polymeric layer, which further comprises a double epoxy-polyamide component.

8. Part (100) according to one of claims 1 to 7, in which the solid particles (125) are only present on a delimited surface of the second layer.

9. A part (100) according to claim 8, wherein the solid particles (125) are 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 of this part.

10. A part (100) according to one of claims 1 to 9, wherein the solid particles (125) the solid particles are sprinkled on the second applied liquid solution which is not completely dry.

11. Part (100) according to one of claims 1 to 10, constituting a galvanized metal bar (100) provided with a non-slip multi-layer coating (105).

12. Element (200) of scaffolding (205) or metal ladder comprising at least one rung (100) according to claim 11.

13. Use of a coating (105) of a galvanized part (100) according to one of claims 1 to 11, as a non-slip coating.

14. Process (300) for treatment to form a galvanized part provided with a non-slip multilayer 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 to form a third polymeric layer covering the solid particles,the third layer being adherent to the second layer, the solid particles having an average non-slip granulometry such that the external surface of the third layer has reliefs generated by these particles.,

15. A method (300) of treatment according to claim 14, 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. 18

Images