EP3487943A1 - Metal element covered with a layer of paint and corresponding production method - Google Patents

Metal element covered with a layer of paint and corresponding production method

Info

Publication number
EP3487943A1
EP3487943A1 EP17748431.8A EP17748431A EP3487943A1 EP 3487943 A1 EP3487943 A1 EP 3487943A1 EP 17748431 A EP17748431 A EP 17748431A EP 3487943 A1 EP3487943 A1 EP 3487943A1
Authority
EP
European Patent Office
Prior art keywords
paint
weight
formulation
element according
layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP17748431.8A
Other languages
German (de)
French (fr)
Inventor
Olivier BONDIL
Sophie CHARDONNET
Sylvie LACHAUME
Myriam PIRE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saint Gobain PAM Canalisation SAS
Original Assignee
Saint Gobain PAM SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Saint Gobain PAM SA filed Critical Saint Gobain PAM SA
Publication of EP3487943A1 publication Critical patent/EP3487943A1/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B32B1/08—Tubular products
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D191/00—Coating compositions based on oils, fats or waxes; Coating compositions based on derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D193/00—Coating compositions based on natural resins; Coating compositions based on derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08—Anti-corrosive paints
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
    • F16L58/04—Coatings characterised by the materials used
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2202/00—Metallic substrate
    • B05D2202/10—Metallic substrate based on Fe

Definitions

  • the present invention relates to an element having:
  • a metal base body in particular of cast iron
  • Piping elements, pieces of road and valve parts with a metal base body are known, in particular with cast iron base bodies. These elements are usually coated with a layer of paint comprising a binder derived from petroleum products.
  • the object of the invention is therefore to propose a base body element made of metal and coated with a layer of paint that is more ecological.
  • the element according to the invention is able to come into contact with water intended for human consumption while maintaining drinking water.
  • the subject of the invention is an element as defined above, characterized in that the binder comprises or consists entirely of materials derived from renewable natural resources of plant or animal origin.
  • the element according to the invention may comprise one or more of the following features:
  • the binder represents between 20% and 50% by weight, in particular between 25% and 40% by weight of the formulation of the paint;
  • the binder comprises:
  • At least one oil of natural origin preferably vegetable
  • the resin is either natural or naturally modified, the resin comprising, for example, an additive resin, a dammar resin or a rosin resin, and
  • the oil is, for example, chosen from rapeseed, sunflower, soybean, olive, palm, linseed, castor oil, cotton, wood, nuts or hazelnuts, almonds, peanuts, maize, rye, fish or beef tallow;
  • the binder is advantageously derived from at least one resin of natural origin, modified or not, such as, for example, terpene resins, in particular extracted from wood, phenolic resins, in particular tannins and lignins, alkyd resins derived from vegetable oils, additive resins derived from vegetable oils or polysaccharides, in particular cellulose or starch;
  • resin of natural origin modified or not, such as, for example, terpene resins, in particular extracted from wood, phenolic resins, in particular tannins and lignins, alkyd resins derived from vegetable oils, additive resins derived from vegetable oils or polysaccharides, in particular cellulose or starch;
  • the binder is devoid of bisphenol, even in trace amounts
  • the paint is either in the organic solvent phase or in the aqueous phase;
  • the paint is in the organic solvent phase
  • the organic solvent being derived, at least in part, from renewable natural resources of vegetable or animal origin, or being at least partly of petrochemical origin, and the solvent represents between 15% and 40% by weight, and preferably between 20% and 35% by weight of the formulation
  • the paint is in aqueous phase and the water represents between 30% and 60% by weight, and preferably between 40% and 55% by weight of the formulation, in particular when the paint comprises at least one or more co-polymers, organic solvents in addition to water, the cosolvent (s) represent less than 10% and preferably less than 5% by weight of the formulation;
  • the organic solvent is chosen from aliphatic solvents, in particular alkanes and alkenes, aromatic solvents, in particular toluene and xylene, alcohols, in particular ethanol and methanol, and ketones, in particular acetone; and methyl isobutyl ketone, ethers, halogenated solvents, especially chloroform, as well as mixtures of these constituents;
  • the paint comprises a filler comprising in particular at least one of the following components: a silicate, in particular quartz, mica, talc, steatite, feldspar or kaolin, silica, calcium phosphate, barium sulphate, barium ferrite, calcium and / or magnesium carbonate, dolomite and chalk, and
  • the mineral filler constitutes between 25% and 60% by weight, and preferably between 30% and 50% by weight of the formulation
  • the paint comprises at least one additive chosen from: one or more rheology agents, one or more anti-UV agents, one or more antifungal agent (s), one or more agents (s); ) biocide (s), anti-foam agent (s), dispersant (s), wetting agent (s), coloring pigment (s) and one or more anticorrosive pigment (s), and
  • the formulation may comprise one or more agents for stabilizing the emulsion, and preferably the additive or additives represent in total less than 20% by weight of the formulation, each of the additives present in the formulation representing less than 5% by weight and preferably less than 3% by weight of the formulation;
  • the element comprises a coating layer, in particular a corrosion-resistant metal layer, in particular based on a sacrificial metal such as zinc or a zinc alloy or a pseudo-zinc alloy, disposed on the surface of the base body, and the paint layer is disposed on the surface of the coating layer,
  • the layer of paint is disposed on the surface of the base body
  • the paint layer is porous, in particular, in the case where the element comprises a layer of coating based on a sacrificial metal, the paint layer regulates and / or limits the rate of consumption of the coating layer;
  • the element is a pipe element, a piece of road or a piece of faucet and, in the case where the element is a pipe element, the element is in particular a pipe, a fitting or a suitable connecting piece to pipe coupling when assembling or repairing a pipeline.
  • the invention also relates to a method of manufacturing an element as defined above, comprising the successive steps of:
  • FIG. 1 is a schematic and partial view of a cross section of a first embodiment of the element according to the invention.
  • Figure 2 and a view similar to that of Figure 1, a second embodiment of an element according to the invention.
  • Figure 1 an element, which is in this case a pipe element 1 coated, buried in a soil 3 and for conveying a fluid 5, for example drinking water.
  • the element can also be a piece of road or a piece of faucet.
  • the pipe element may be a pipe, a fitting, or a connecting piece suitable for pipe coupling when mounting or repairing a pipe.
  • the pipe element 1 comprises a base body 7 and an outer coating 9 situated between the ground 3 and the base body 7, advantageously distributed over the base body 7 so as to isolate it from the ground 3.
  • the base body 7 is based on iron, preferably ductile iron. In the example shown, the base body 7 extends in a longitudinal direction L perpendicular to the plane of the figure. Only a portion of the section of the base body 7 is shown in FIG.
  • the fluid 5 circulates inside the base body 7 in the longitudinal direction L.
  • An inner coating may exist on an inner wall of the base body 7, to isolate the fluid 5 from the base body 7.
  • the outer coating 9 comprises a metal coating layer 1 1 and a paint layer 13 disposed on the coating layer January 1.
  • the paint layer 13 is disposed either on at least a portion of the surface of the base body 7 or on a metal coating layer 11 disposed on the surface of the base body 7.
  • the coating layer 11 is a protective layer against corrosion, in particular based on a sacrificial metal.
  • the metal coating layer 1 1 is porous and advantageously deposited by arc electroplating.
  • the metal coating layer 11 comprises or consists of substantially pure zinc, having for example a mass concentration greater than or equal to 99.9%, or a zinc alloy or pseudo-alloy.
  • the alloy or pseudoalloy comprises, in mass proportion, at least 50% of zinc and between 0.5% and 40% of aluminum.
  • the coating layer 11 consists of 85% zinc and 15% aluminum in proportions by weight. Under the action of the corrosive agents of the soil, the coating layer January 1 turns into a protective layer of stable corrosion products in the medium where it originated.
  • the zinc / aluminum alloy layer is also said to be "anodic" with respect to the melt, in that it can be progressively transformed by oxidation under the effect of the electrochemical cell formed by the melt, the alloy and the ground, to protect the underlying cast iron or exposed to defects of the alloy layer, by forming said protective layer.
  • the coating layer 1 1 Due to its arc metallization deposition, the coating layer 1 1 consists of solidified droplets and is therefore porous.
  • the metallization process settings governing pore size and layer thickness those skilled in the art are able to adjust conditions, including rate, of formation of the protective layer. It has been found that the biphasic structure of the zinc / aluminum alloy promotes the entrapment of zinc transformation products.
  • the coating layer 11 also comprises magnesium, and / or copper, and / or silver, with mass contents of between 0 and 5%. These elements are added in elemental form or oxides.
  • the coating layer 11 advantageously has a surface density of between 130 g / m 2 and 400 g / m 2.
  • the coating layer 1 1 is deposited by thermal spraying, to obtain the aforementioned surface densities.
  • the paint of the paint layer 13 according to the invention can be used to cover all or part of the base body of the pipe element 1, the road piece or the valve part, for example when the paint is used. as a protective barrier against corrosion.
  • the paint according to the invention is used as a filler of the anticorrosive metal coating layer 1 1 previously applied to the outer surface of the base body 7.
  • the paint layer 13 consists of a paint whose properties and characteristics will be explained below.
  • the paint layer 13 is porous and capable of clogging the pores of the coating layer 1 1 to ensure the proper functioning of the galvanic protection provided by the coating layer January 1.
  • the paint layer 13 has the function of regulating and / or limiting the rate of consumption of the metal coating layer 1 1 anticorrosion.
  • the paint layer 13 is sufficiently porous to allow exchanges between the soil 3 and the coating layer 1 1 metallic, for example based on Zn. This thus regulates the migration of the electrolyte from the sol 3 to the coating layer 11 and the migration to the ground 3 of the sacrificial metal conversion products of the coating layer 11, for example the Zn conversion products.
  • the paint layer 13 must not be too porous either so that the coating layer, for example zinc, is not consumed too quickly.
  • the pores of the paint layer are open pores.
  • the function of the paint layer 13 is to anchor, by virtue of its pores, the sacrificial metal conversion products of the coating layer 11, for example the Zn conversion products, which are formed above of it between the paint layer 13 and the ground 3.
  • the paint is for example formulated from compounds belonging to the positive lists of the European Union for the contact with the foodstuffs (European regulation EU 10/201 1) and has the regulatory approvals (for example a Certificate of Conformity Sanitary (ACS), or an English WRAS certificate) for products placed in contact with water intended for human consumption.
  • the paint according to the invention is therefore able to come into contact with drinking water intended for human consumption and is free of bisphenols, even in trace amounts.
  • the paint of the paint layer 13 has the following characteristics:
  • the paint according to the invention comprises at least one biobased binder derived from renewable natural resources of vegetable or animal origin.
  • the binder is entirely derived from renewable natural resources of vegetable or animal origin.
  • the paint is, before drying, either in the organic solvent phase, or in the aqueous "water-soluble" phase, in particular in aqueous emulsion, with or without organic co-solvent (s).
  • the paint layer 13 may be free of organic solvent or co-solvent, in particular derived from hydrocarbons.
  • the paint may comprise mineral fillers as well as as possible additives that will be specified later.
  • formulation is meant subsequently the composition of the paint of the paint layer 13 in the liquid state before application to the base body or the coating layer 1 January. More specifically, the paint formulation comprises the components described below.
  • the binder comprises essentially or exclusively materials derived from renewable resources, of vegetable or animal origin, and represents between 20% and 50% by weight, and preferably between 25% and 40% by weight of the formulation.
  • the binder can be derived from at least one renewable resin of natural origin, preferably plant, and at least one naturally occurring, preferably plant-based, oil.
  • the binder preferably has a content (by weight) of resin (s) derived from renewable natural resources which is the majority compared to the content of oil (s) of natural origin.
  • the resin content (s) derived from renewable natural resources of the binder is greater than the content of natural oils (s) of the binder.
  • the formulation of the paint layer 13 and consequently the paint layer 13 is free of alkali.
  • Renewable resins of plant origin may be natural, that is to say used as they are obtained by the natural source, optionally purified, or natural modified, that is to say, chemically transformed.
  • the resins are, for example, additive resins, dammar resins, natural or modified rosin resins.
  • Such resins are for example disclosed in EP1466878, EP2090623 and FR2995891.
  • oils of vegetable or animal origin is (are) for example chosen from rapeseed, sunflower, soybean, olive, palm, linseed, castor oil, cotton, wood , nuts or hazelnuts, almonds, peanuts, corn, rye, fish or beef tallow. Oils are for example described in the following documents EP1466878; EP2090623; EP2135851 and FR2995891.
  • the binder may be derived from at least one renewable resin of natural origin.
  • the resin may be in the natural state that is to say used as it is obtained by the natural source, optionally purified, or may be a modified natural resin, that is to say chemically transformed.
  • examples of such resins are terpene resins, in particular extracted from wood, alkyds derived from vegetable oils, additives derived from vegetable oils, or polysaccharides such as cellulose and starch.
  • Other examples of resins are phenolic resins such as tannins and lignins.
  • the solvent may be derived, at least in part, from renewable resources of plant or animal origin, but may also be of petrochemical origin. In the case of an organic solvent phase paint, it represents between 15% and 40% by weight, and preferably between 20% and 35% by weight of the formulation.
  • the water represents between 30% and 60% by weight, and preferably between 40% and 55% by weight of the formulation.
  • the latter or they represent less than 10% and preferably less than 5% by weight of the formulation.
  • organic solvents used with an organic solvent phase paint according to the invention mention may be made of: aliphatic solvents (alkanes and alkenes), aromatic solvents (toluene, xylene), alcohols (ethanol, methanol, etc.), ketones (acetone, methyl isobutyl ketone, etc.), ethers, halogenated solvents (chloroform, etc.) or others, as well as mixtures of these constituents.
  • the fillers may comprise mineral fillers such as, for example, quartz, mica, talc, steatite, feldspar, kaolin and silicates in general, calcium phosphate, barium sulfate, barium ferrite, calcium carbonate and / or magnesium, chalk, silica and dolomite. They can represent between 25% and 60% by weight, and preferably between 30% and 50% of the weight of the formulation.
  • the formulation may also comprise one or more additives.
  • the additives may comprise or consist of the following additives which are well known to those skilled in the art: rheology agent (s), anti-UV agent (s), antifungal agent (s), agent (s) ) biocide (s), antifoaming agent (s), dispersing agent (s), wetting agent (s), coloring pigment (s) and anti-corrosion pigment (s).
  • the formulation may also comprise an agent (s) for stabilizing the emulsion.
  • additives represent in total less than 20% by weight of the formulation, each of the additives present in the formulation representing less than 5% by weight and preferably less than 3% by weight of the formulation.
  • Figure 2 is illustrated an element according to a second embodiment of the invention. This embodiment differs from that of Figure 1 only by the following. Similar elements bear the same references.
  • the paint layer 13 is deposited directly on the outer surface of the base body 7.
  • the metal coating layer 1 1 is omitted and the outer coating 9 consists of the paint layer 13.
  • an inner paint layer 14 is disposed on the inner surface of the base body 7. This paint layer 14 is in contact with the surface internal of the base body 7 and forms the inner surface of the element 1 in contact with the fluid 5 flowing in the element 1.
  • composition of the paint of the paint layer 14 is identical to the composition of the paint of the paint layer 13.
  • the method of manufacturing the element according to the invention comprises the following steps:
  • the base body 7 is manufactured and supplied, for example by casting in a mold.
  • the coating layer 11 is applied to the surface of the base body 7.
  • the base body 7, equipped optionally with the metal coating layer 1 1, is heated to a temperature between 40 ° C and 80 ° C.
  • the paint is applied to the base body 7, respectively to the coating layer 11, while the paint is at a temperature between 20 ° C and 40 ° C and while the base body, and respectively also the coating layer 11 is at a temperature between 40 ° C and 80 ° C.
  • the layer of paint 13 thus deposited is dried at a drying temperature of between 70 ° and 90 ° C. for 45 minutes to 90 minutes in the case of an organic solvent phase paint and for 15 minutes to 45 minutes in the case of an aqueous phase paint.
  • the paint according to the invention can be applied by spraying with the aid of a spray gun, preferably by an airless type process, by dipping in a paint bath, or by brushing.
  • the thickness of the paint layer is then between 200 ⁇ and 500 ⁇ , and preferably between 250 ⁇ and 400 ⁇ .
  • the thickness of the paint layer is then between 70 ⁇ and 200 ⁇ , and preferably between 80 ⁇ and 150 ⁇ .
  • the constituents of the paint make the element ecological while guaranteeing acceptable properties of durability.
  • the invention may also generally comprise the following steps:
  • the element comprising an anticorrosive metal coating layer, in particular based on a sacrificial metal such as zinc or a zinc alloy or a zinc pseudoalloy, disposed on the surface of the base body 7,
  • the paint layer 13 being disposed on the surface of the coating layer 1 1, and

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Paints Or Removers (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Chemically Coating (AREA)
  • Materials For Medical Uses (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Catalysts (AREA)

Abstract

The invention relates to an element comprising: a metal base body (7), and a layer of paint (13) extending over at least part of the base body, the paint of the layer of paint having a formulation comprising a binder. The binder comprises or consists entirely of materials produced from renewable natural resources of plant or animal origin. The invention applies to cast-iron pipe elements.

Description

ELEMENT MÉTALLIQUE RECOUVERT D'UNE COUCHE DE PEINTURE ET PROCEDE DE FABRICATION CORRESPONDANT  METALLIC ELEMENT COVERED WITH A PAINT LAYER AND METHOD OF MANUFACTURING THE SAME
La présente invention concerne un élément ayant : The present invention relates to an element having:
- un corps de base métallique, notamment en fonte,  a metal base body, in particular of cast iron,
- une couche de peinture s'étendant sur au moins une partie du corps de base, et a paint layer extending over at least a portion of the base body, and
- la peinture de la couche de peinture ayant une formulation comprenant un liant. On connaît des éléments de canalisation, des pièces de voirie et des pièces de robinetterie à corps de base métallique, notamment à corps de base en fonte. Ces éléments sont habituellement revêtus d'une couche de peinture comprenant un liant issu de produits pétroliers. painting the paint layer having a formulation comprising a binder. Piping elements, pieces of road and valve parts with a metal base body are known, in particular with cast iron base bodies. These elements are usually coated with a layer of paint comprising a binder derived from petroleum products.
Toutefois, les éléments connus ne donnent pas entière satisfaction en raison du liant issu de produit pétroliers.  However, the known elements are not entirely satisfactory because of the binder derived from petroleum products.
L'invention a donc pour but de proposer un élément à corps de base en métal et revêtu d'une couche de peinture qui soit plus écologique.  The object of the invention is therefore to propose a base body element made of metal and coated with a layer of paint that is more ecological.
De préférence, l'élément selon l'invention est apte à entrer en contact avec des eaux destinées à la consommation humaine tout en maintenant l'eau potable.  Preferably, the element according to the invention is able to come into contact with water intended for human consumption while maintaining drinking water.
A cet effet, l'invention a pour objet un élément tel que défini ci-dessus, caractérisé en ce que le liant comprend ou est constitué en totalité de matières issues de ressources naturelles renouvelables d'origine végétale ou animale.  For this purpose, the subject of the invention is an element as defined above, characterized in that the binder comprises or consists entirely of materials derived from renewable natural resources of plant or animal origin.
L'élément selon l'invention peut comprendre l'une ou plusieurs des caractéristiques suivantes :  The element according to the invention may comprise one or more of the following features:
- le liant représente entre 20% et 50% en poids, notamment entre 25% et 40% en poids de la formulation de la peinture ;  the binder represents between 20% and 50% by weight, in particular between 25% and 40% by weight of the formulation of the paint;
- le liant comprend :  the binder comprises:
- au moins une résine issue de ressources naturelles renouvelables, de préférence d'origine végétale, et  at least one resin derived from renewable natural resources, preferably of plant origin, and
- au moins une huile d'origine naturelle, de préférence végétale ;  at least one oil of natural origin, preferably vegetable;
- la résine est soit naturelle soit naturelle modifiée, la résine comprenant par exemple une résine accroïde, une résine dammar ou une résine de colophane, et  the resin is either natural or naturally modified, the resin comprising, for example, an additive resin, a dammar resin or a rosin resin, and
- l'huile est par exemple choisie parmi les huiles de colza, de tournesol, de soja, d'olives, de palme, de lin, de ricin, de coton, de bois, de noix ou noisettes, d'amandes, d'arachides, de maïs, de seigle, de poissons ou de suif de bœuf ; the oil is, for example, chosen from rapeseed, sunflower, soybean, olive, palm, linseed, castor oil, cotton, wood, nuts or hazelnuts, almonds, peanuts, maize, rye, fish or beef tallow;
- le liant est issu avantageusement d'au moins une résine d'origine naturelle modifiée ou non, telle que par exemple, les résines terpéniques, notamment extraites de bois, les résines phénoliques, notamment les tannins et lignines, les résines alkydes issues d'huiles végétales, les résines accroïdes issues d'huiles végétales ou les polysaccharides, notamment la cellulose ou l'amidon ; the binder is advantageously derived from at least one resin of natural origin, modified or not, such as, for example, terpene resins, in particular extracted from wood, phenolic resins, in particular tannins and lignins, alkyd resins derived from vegetable oils, additive resins derived from vegetable oils or polysaccharides, in particular cellulose or starch;
- le liant est dépourvu de bisphénol, même à l'état de traces ;  the binder is devoid of bisphenol, even in trace amounts;
- la peinture est soit en phase solvant organique soit en phase aqueuse ;  the paint is either in the organic solvent phase or in the aqueous phase;
- soit la peinture est en phase solvant organique, le solvant organique étant issu, au moins en partie, de ressources naturelles renouvelables d'origine végétale ou animale, ou étant au moins en partie d'origine pétrochimique, et le solvant représente entre 15% et 40% en poids, et de préférence entre 20% et 35% en poids de la formulation,  or the paint is in the organic solvent phase, the organic solvent being derived, at least in part, from renewable natural resources of vegetable or animal origin, or being at least partly of petrochemical origin, and the solvent represents between 15% and 40% by weight, and preferably between 20% and 35% by weight of the formulation,
- soit la peinture est en phase aqueuse et l'eau représente entre 30% et 60% en poids, et de préférence entre 40% et 55% en poids de la formulation, en particulier lorsque la peinture comprend au moins un ou plusieurs co-solvants organiques en plus de l'eau, le ou les co-solvant(s) représentent moins de 10% et de préférence moins de 5% en poids de la formulation ;  or the paint is in aqueous phase and the water represents between 30% and 60% by weight, and preferably between 40% and 55% by weight of the formulation, in particular when the paint comprises at least one or more co-polymers, organic solvents in addition to water, the cosolvent (s) represent less than 10% and preferably less than 5% by weight of the formulation;
- le solvant organique est choisi parmi les solvants aliphatiques, en particulier les alcanes et alcènes, les solvants aromatiques, en particulier le toluène et le xylène, les alcools, en particulier l'éthanol et le méthanol, les cétones, en particulier l'acétone et la méthylisobutylcétone, les éthers, les solvants halogénés, notamment le chloroforme, ainsi que des mélanges de ces constituants ;  the organic solvent is chosen from aliphatic solvents, in particular alkanes and alkenes, aromatic solvents, in particular toluene and xylene, alcohols, in particular ethanol and methanol, and ketones, in particular acetone; and methyl isobutyl ketone, ethers, halogenated solvents, especially chloroform, as well as mixtures of these constituents;
- la peinture comprend une charge comprenant notamment au moins l'un des composants suivants : un silicate, en particulier du quartz, du mica, du talc, de la stéatite, du feldspath ou du kaolin, de la silice, du phosphate de calcium, du sulfate de baryum, de la ferrite de baryum, du carbonate de calcium et/ou de magnésium, de la dolomite et de la craie, et  the paint comprises a filler comprising in particular at least one of the following components: a silicate, in particular quartz, mica, talc, steatite, feldspar or kaolin, silica, calcium phosphate, barium sulphate, barium ferrite, calcium and / or magnesium carbonate, dolomite and chalk, and
en particulier la charge minérale constitue entre 25% et 60% en poids, et de préférence entre 30% et 50% en poids de la formulation ;  in particular the mineral filler constitutes between 25% and 60% by weight, and preferably between 30% and 50% by weight of the formulation;
- la peinture comprend au moins un additif choisi parmi : un ou des agent(s) de rhéologie, un ou des agent(s) anti-UV, un ou des agent(s) antifongique(s), un ou des agent(s) biocide(s), un ou des agent(s) anti-mousse, un ou des agent(s) dispersant(s), un ou des agent(s) mouillant(s), un ou des pigment(s) de coloration et un ou des pigment(s) anticorrosion, et  the paint comprises at least one additive chosen from: one or more rheology agents, one or more anti-UV agents, one or more antifungal agent (s), one or more agents (s); ) biocide (s), anti-foam agent (s), dispersant (s), wetting agent (s), coloring pigment (s) and one or more anticorrosive pigment (s), and
la formulation peut comprendre un ou des agent(s) de stabilisation de l'émulsion, et de préférence le ou les additifs représentent au total moins de 20% en poids de la formulation, chacun des additifs présents dans la formulation représentant moins de 5% en poids et de préférence moins de 3% en poids de la formulation ; the formulation may comprise one or more agents for stabilizing the emulsion, and preferably the additive or additives represent in total less than 20% by weight of the formulation, each of the additives present in the formulation representing less than 5% by weight and preferably less than 3% by weight of the formulation;
- soit l'élément comprend une couche de revêtement, notamment métallique anticorrosion, en particulier à base d'un métal sacrificiel tel que du zinc ou un alliage de zinc ou un pseudo-alliage de zinc, disposée sur la surface du corps de base et la couche de peinture est disposée sur la surface de la couche de revêtement,  or the element comprises a coating layer, in particular a corrosion-resistant metal layer, in particular based on a sacrificial metal such as zinc or a zinc alloy or a pseudo-zinc alloy, disposed on the surface of the base body, and the paint layer is disposed on the surface of the coating layer,
- soit la couche de peinture est disposée sur la surface du corps de base ;  the layer of paint is disposed on the surface of the base body;
- la couche de peinture est poreuse, en particulier, dans le cas où l'élément comprend une couche de revêtement à base d'un métal sacrificiel, la couche de peinture régule et/ou limite la vitesse de consommation de la couche de revêtement ; et  the paint layer is porous, in particular, in the case where the element comprises a layer of coating based on a sacrificial metal, the paint layer regulates and / or limits the rate of consumption of the coating layer; and
- l'élément est un élément de canalisation, une pièce de voirie ou une pièce de robinetterie et, dans le cas où l'élément est un élément de canalisation, l'élément est notamment un tuyau, un raccord ou une pièce de jonction adaptée à l'accouplement de tuyaux lors du montage ou de la réparation d'une canalisation.  - the element is a pipe element, a piece of road or a piece of faucet and, in the case where the element is a pipe element, the element is in particular a pipe, a fitting or a suitable connecting piece to pipe coupling when assembling or repairing a pipeline.
L'invention a également pour objet un procédé de fabrication d'un élément tel que défini ci-dessus, comprenant les étapes successives consistant à :  The invention also relates to a method of manufacturing an element as defined above, comprising the successive steps of:
- fournir le corps de base,  - provide the basic body,
- revêtir le corps de base de la couche de peinture pendant que la peinture est à une température comprise entre 20°C et 40°C et pendant que le corps de base, et éventuellement également la couche de revêtement, est à une température comprise entre 40°C et 80°C, et  - coating the base body with the paint layer while the paint is at a temperature between 20 ° C and 40 ° C and while the base body, and possibly also the coating layer, is at a temperature between 40 ° C and 80 ° C, and
- faire sécher le corps de base revêtu à une température comprise entre 70° et 90°C pendant 45 min à 90 min dans le cas d'une peinture en phase solvant organique et pendant 15 min à 45 min dans le cas d'une peinture en phase aqueuse.  - Dry the coated base body at a temperature between 70 ° and 90 ° C for 45 min to 90 min in the case of an organic solvent phase paint and for 15 minutes to 45 min in the case of a paint in the aqueous phase.
L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple, et faite en se référant aux dessins annexés, sur lesquels :  The invention will be better understood on reading the description which follows, given solely by way of example, and with reference to the appended drawings, in which:
La figure 1 est une vue schématique et partielle d'une section transversale d'un premier mode de réalisation de l'élément selon l'invention : et  FIG. 1 is a schematic and partial view of a cross section of a first embodiment of the element according to the invention; and
la figure 2 et une vue analogue à celle de la figure 1 , d'un second mode de réalisation d'un élément selon l'invention.  Figure 2 and a view similar to that of Figure 1, a second embodiment of an element according to the invention.
Les caractéristiques divulguées ci-après dans le cadre d'un mode de réalisation peuvent être appliquées isolément à ce mode de réalisation, indépendamment des autres caractéristiques divulguées de ce mode de réalisation pour autant que cela soit techniquement possible. Les caractéristiques divulguées ci-après dans le cadre d'un mode de réalisation peuvent également être appliquées isolément ou en combinaison à tous les autres modes de réalisation. The features disclosed hereinafter in the context of one embodiment may be applied in isolation to this embodiment, independently of the other disclosed features of this embodiment as far as this is concerned. technically possible. The features disclosed hereinafter in the context of one embodiment may also be applied in isolation or in combination with all other embodiments.
Sur la figure 1 est représenté un élément, qui est en l'occurrence un élément de canalisation 1 revêtu, enterré dans un sol 3 et servant à transporter un fluide 5, par exemple de l'eau potable.  In Figure 1 is shown an element, which is in this case a pipe element 1 coated, buried in a soil 3 and for conveying a fluid 5, for example drinking water.
L'élément peut être également une pièce de voirie ou une pièce de robinetterie. The element can also be a piece of road or a piece of faucet.
L'élément de canalisation peut être un tuyau, un raccord ou une pièce de jonction adaptée à l'accouplement de tuyaux lors du montage ou de la réparation d'une canalisation. The pipe element may be a pipe, a fitting, or a connecting piece suitable for pipe coupling when mounting or repairing a pipe.
L'élément de canalisation 1 comprend un corps de base 7 et un revêtement extérieur 9 situé entre le sol 3 et le corps de base 7, avantageusement réparti sur le corps de base 7 de manière à l'isoler du sol 3.  The pipe element 1 comprises a base body 7 and an outer coating 9 situated between the ground 3 and the base body 7, advantageously distributed over the base body 7 so as to isolate it from the ground 3.
Le corps de base 7 est à base de fer, avantageusement en fonte ductile. Dans l'exemple représenté, le corps de base 7 s'étend selon une direction longitudinale L perpendiculaire au plan de la figure. Seule une portion de la section du corps de base 7 est représentée sur la figure 1 .  The base body 7 is based on iron, preferably ductile iron. In the example shown, the base body 7 extends in a longitudinal direction L perpendicular to the plane of the figure. Only a portion of the section of the base body 7 is shown in FIG.
Le fluide 5 circule à l'intérieur du corps de base 7 selon la direction longitudinale L. Un revêtement intérieur, non représenté, peut exister sur une paroi interne du corps de base 7, pour isoler le fluide 5 du corps de base 7.  The fluid 5 circulates inside the base body 7 in the longitudinal direction L. An inner coating, not shown, may exist on an inner wall of the base body 7, to isolate the fluid 5 from the base body 7.
Le revêtement extérieur 9 comprend une couche de revêtement métallique 1 1 et une couche de peinture 13 disposée sur la couche de revêtement 1 1 .  The outer coating 9 comprises a metal coating layer 1 1 and a paint layer 13 disposed on the coating layer January 1.
D'une manière générale, la couche de peinture 13 est disposée soit sur au moins une partie de la surface du corps de base 7, soit sur une couche de revêtement métallique 1 1 disposée sur la surface du corps de base 7.  In general, the paint layer 13 is disposed either on at least a portion of the surface of the base body 7 or on a metal coating layer 11 disposed on the surface of the base body 7.
La couche de revêtement 1 1 est une couche de protection contre la corrosion, notamment à base d'un métal sacrificiel.  The coating layer 11 is a protective layer against corrosion, in particular based on a sacrificial metal.
La couche de revêtement métallique 1 1 est poreuse et avantageusement déposée par métallisation à l'arc électrique. La couche de revêtement métallique 1 1 comprend du ou est constituée de zinc sensiblement pur, présentant par exemple une concentration massique supérieure ou égale à 99,9%, ou un alliage ou pseudo-alliage de zinc. L'alliage ou pseudo-alliage comprend, en proportion massique, au moins 50% de zinc et entre 0,5% et 40% d'aluminium. Par exemple, la couche de revêtement 1 1 est constituée de 85% de zinc et 15% d'aluminium en proportions massiques. Sous l'action des agents corrosifs du sol, la couche de revêtement 1 1 se transforme en une couche protectrice de produits de corrosion stable dans le milieu où elle a pris naissance. La couche d'alliage zinc/aluminium est par ailleurs dite "anodique" par rapport à la fonte, en ce sens qu'elle peut se transformer progressivement par oxydation sous l'effet de la pile électrochimique formée par la fonte, l'alliage et le sol, pour protéger la fonte sous-jacente ou mise à nu au niveau de défauts de la couche d'alliage, par formation de ladite couche protectrice. The metal coating layer 1 1 is porous and advantageously deposited by arc electroplating. The metal coating layer 11 comprises or consists of substantially pure zinc, having for example a mass concentration greater than or equal to 99.9%, or a zinc alloy or pseudo-alloy. The alloy or pseudoalloy comprises, in mass proportion, at least 50% of zinc and between 0.5% and 40% of aluminum. For example, the coating layer 11 consists of 85% zinc and 15% aluminum in proportions by weight. Under the action of the corrosive agents of the soil, the coating layer January 1 turns into a protective layer of stable corrosion products in the medium where it originated. The zinc / aluminum alloy layer is also said to be "anodic" with respect to the melt, in that it can be progressively transformed by oxidation under the effect of the electrochemical cell formed by the melt, the alloy and the ground, to protect the underlying cast iron or exposed to defects of the alloy layer, by forming said protective layer.
Du fait de son dépôt par métallisation à l'arc, la couche de revêtement 1 1 est constituée de gouttelettes solidifiées et est donc poreuse. Par une adaptation des réglages du procédé de métallisation gouvernant la taille des pores et de l'épaisseur de la couche, l'homme du métier est capable de régler les conditions, notamment la vitesse, de formation de la couche protectrice. Il a été constaté que la structure biphasique de l'alliage zinc/aluminium favorise le piégeage des produits de transformation du zinc.  Due to its arc metallization deposition, the coating layer 1 1 consists of solidified droplets and is therefore porous. By adapting the metallization process settings governing pore size and layer thickness, those skilled in the art are able to adjust conditions, including rate, of formation of the protective layer. It has been found that the biphasic structure of the zinc / aluminum alloy promotes the entrapment of zinc transformation products.
Avantageusement, la couche de revêtement 1 1 comprend également du magnésium, et/ou du cuivre, et/ou de l'argent, avec des teneurs massiques comprises entre 0 et 5 %. Ces éléments sont ajoutés sous forme élémentaire ou d'oxydes.  Advantageously, the coating layer 11 also comprises magnesium, and / or copper, and / or silver, with mass contents of between 0 and 5%. These elements are added in elemental form or oxides.
La couche de revêtement 1 1 présente avantageusement une densité surfacique comprise entre 130 g/m2 et 400 g/m2. Avantageusement, la couche de revêtement 1 1 est déposée par projection thermique, pour obtenir les densités surfaciques précitées.  The coating layer 11 advantageously has a surface density of between 130 g / m 2 and 400 g / m 2. Advantageously, the coating layer 1 1 is deposited by thermal spraying, to obtain the aforementioned surface densities.
La peinture de la couche de peinture 13 selon l'invention peut servir à recouvrir tout ou partie du corps de base de l'élément de canalisation 1 , de la pièce de voirie ou de la pièce de robinetterie, par exemple lorsque la peinture est utilisée comme barrière de protection contre la corrosion.  The paint of the paint layer 13 according to the invention can be used to cover all or part of the base body of the pipe element 1, the road piece or the valve part, for example when the paint is used. as a protective barrier against corrosion.
Avantageusement, la peinture selon l'invention est utilisée comme bouche-pores de la couche de revêtement 1 1 métallique anticorrosion préalablement appliquée sur la surface extérieure du corps de base 7.  Advantageously, the paint according to the invention is used as a filler of the anticorrosive metal coating layer 1 1 previously applied to the outer surface of the base body 7.
La couche de peinture 13 est constituée d'une peinture dont les propriétés et caractéristiques seront explicitées ci-après.  The paint layer 13 consists of a paint whose properties and characteristics will be explained below.
La couche de peinture 13 est poreuse et apte à boucher des pores de la couche de revêtement 1 1 pour assurer le bon fonctionnement de la protection galvanique apportée par la couche de revêtement 1 1 .  The paint layer 13 is porous and capable of clogging the pores of the coating layer 1 1 to ensure the proper functioning of the galvanic protection provided by the coating layer January 1.
Dans cette application comme peinture bouche-pores, la couche de peinture 13 a pour fonction de réguler et/ou de limiter la vitesse de consommation de la couche de revêtement 1 1 métallique anticorrosion. La couche de peinture 13 est suffisamment poreuse pour permettre les échanges entre le sol 3 et la couche de revêtement 1 1 métallique, par exemple à base de Zn. Ceci régule ainsi la migration de l'électrolyte du sol 3 vers la couche de revêtement 1 1 et la migration vers le sol 3 des produits de conversion du métal sacrificiel de la couche de revêtement 1 1 , par exemple les produits de conversion du Zn. Toutefois, la couche de peinture 13 ne doit pas être trop poreuse non plus afin que la couche de revêtement, par exemple le zinc, ne se consomme pas trop vite. In this application as a filler paint, the paint layer 13 has the function of regulating and / or limiting the rate of consumption of the metal coating layer 1 1 anticorrosion. The paint layer 13 is sufficiently porous to allow exchanges between the soil 3 and the coating layer 1 1 metallic, for example based on Zn. This thus regulates the migration of the electrolyte from the sol 3 to the coating layer 11 and the migration to the ground 3 of the sacrificial metal conversion products of the coating layer 11, for example the Zn conversion products. However, the paint layer 13 must not be too porous either so that the coating layer, for example zinc, is not consumed too quickly.
Par ailleurs, les pores de la couche de peinture sont des pores ouverts.  In addition, the pores of the paint layer are open pores.
En outre, la couche de peinture 13 a pour fonction d'ancrer, grâce à ses pores, les produits de conversion du métal sacrificiel de la couche de revêtement 1 1 , par exemple les produits de conversion du Zn, qui se forment au-dessus d'elle entre la couche de peinture 13 et le sol 3.  In addition, the function of the paint layer 13 is to anchor, by virtue of its pores, the sacrificial metal conversion products of the coating layer 11, for example the Zn conversion products, which are formed above of it between the paint layer 13 and the ground 3.
La peinture est par exemple formulée à partir de composés appartenant aux listes positives de l'Union Européenne pour le contact avec les denrées alimentaires (règlement européen UE n° 10 / 201 1 ) et dispose des agréments réglementaires (par exemple une Attestation de Conformité Sanitaire française (ACS), ou un certificat WRAS anglais) pour les produits placés au contact des eaux destinées à la consommation humaine. Avantageusement, la peinture selon l'invention est donc apte à entrer en contact avec de l'eau potable destinée à la consommation humaine et est dépourvue de bisphénols, même à l'état de traces.  The paint is for example formulated from compounds belonging to the positive lists of the European Union for the contact with the foodstuffs (European regulation EU 10/201 1) and has the regulatory approvals (for example a Certificate of Conformity Sanitary (ACS), or an English WRAS certificate) for products placed in contact with water intended for human consumption. Advantageously, the paint according to the invention is therefore able to come into contact with drinking water intended for human consumption and is free of bisphenols, even in trace amounts.
La peinture de la couche de peinture 13 a les caractéristiques suivantes :  The paint of the paint layer 13 has the following characteristics:
La peinture selon l'invention comprend au moins un liant biosourcé issu de ressources naturelles renouvelables d'origine végétale ou animale. Avantageusement, le liant est issu en totalité de ressources naturelles renouvelables d'origine végétale ou animale.  The paint according to the invention comprises at least one biobased binder derived from renewable natural resources of vegetable or animal origin. Advantageously, the binder is entirely derived from renewable natural resources of vegetable or animal origin.
La peinture est, avant séchage, soit en phase solvant organique, soit en phase aqueuse « hydrodiluable », notamment en émulsion aqueuse, avec ou sans co-solvant(s) organique(s). La couche de peinture 13 peut être dépourvue de solvant ou co-solvant organique, notamment dérivé des hydrocarbures.  The paint is, before drying, either in the organic solvent phase, or in the aqueous "water-soluble" phase, in particular in aqueous emulsion, with or without organic co-solvent (s). The paint layer 13 may be free of organic solvent or co-solvent, in particular derived from hydrocarbons.
Outre le(s) liant(s), le(s) solvant(s) organique(s), le(s) co-solvant(s) organique(s) ou l'eau, la peinture peut comprendre des charges minérales ainsi que d'éventuels additifs qu'on précisera par la suite.  In addition to the binder (s), the organic solvent (s), the organic co-solvent (s) or the water, the paint may comprise mineral fillers as well as as possible additives that will be specified later.
Par « formulation » on entend par la suite la composition de la peinture de la couche de peinture 13 à l'état liquide avant l'application sur le corps de base ou sur la couche de revêtement 1 1 . Plus précisément, la formulation de la peinture comprend les composants décrits ci-après. By "formulation" is meant subsequently the composition of the paint of the paint layer 13 in the liquid state before application to the base body or the coating layer 1 January. More specifically, the paint formulation comprises the components described below.
Le liant comprend essentiellement ou exclusivement des matières issues de ressources renouvelables, d'origine végétale ou animale, et représente entre 20% et 50% en poids, et de préférence entre 25% et 40% en poids de la formulation.  The binder comprises essentially or exclusively materials derived from renewable resources, of vegetable or animal origin, and represents between 20% and 50% by weight, and preferably between 25% and 40% by weight of the formulation.
Dans le cas d'une peinture en phase solvant organique, le liant peut être issu d'au moins une résine renouvelable d'origine naturelle, de préférence végétale, et d'au moins une huile d'origine naturelle, de préférence végétale.  In the case of an organic solvent phase paint, the binder can be derived from at least one renewable resin of natural origin, preferably plant, and at least one naturally occurring, preferably plant-based, oil.
Le liant a de préférence une teneur (en poids) en résine(s) issue(s) de ressources naturelles renouvelables qui est majoritaire par rapport à la teneur en huile(s) d'origine naturelle. En d'autres termes, la teneur en résine(s) issue(s) de ressources naturelles renouvelables du liant est supérieure à la teneur en huiles d'origine naturelle(s) du liant.  The binder preferably has a content (by weight) of resin (s) derived from renewable natural resources which is the majority compared to the content of oil (s) of natural origin. In other words, the resin content (s) derived from renewable natural resources of the binder is greater than the content of natural oils (s) of the binder.
Par ailleurs, la formulation de la couche de peinture 13 et en conséquence la couche de peinture 13 est exempte d'alcali.  Furthermore, the formulation of the paint layer 13 and consequently the paint layer 13 is free of alkali.
Les résines renouvelables d'origine végétale, peuvent être naturelles, c'est-à-dire utilisées telles qu'elles sont obtenues par la source naturelle, éventuellement purifiées, ou naturelles modifiées, c'est-à-dire transformées chimiquement. Les résines sont par exemple les résines accroïdes, les résines dammar, les résines de colophane naturelles ou modifiées. De telles résines sont par exemple divulguées dans les documents EP1466878, EP2090623 et FR2995891 .  Renewable resins of plant origin, may be natural, that is to say used as they are obtained by the natural source, optionally purified, or natural modified, that is to say, chemically transformed. The resins are, for example, additive resins, dammar resins, natural or modified rosin resins. Such resins are for example disclosed in EP1466878, EP2090623 and FR2995891.
La ou les huiles d'origine végétale ou animale est (sont) par exemple choisie(s) parmi les huiles de colza, de tournesol, de soja, d'olives, de palme, de lin, de ricin, de coton, de bois, de noix ou noisettes, d'amandes, d'arachides, de maïs, de seigle, de poissons ou de suif de bœuf. Des huiles sont par exemple décrites dans les documents suivants EP1466878 ; EP2090623 ; EP2135851 et FR2995891 .  The oil or oils of vegetable or animal origin is (are) for example chosen from rapeseed, sunflower, soybean, olive, palm, linseed, castor oil, cotton, wood , nuts or hazelnuts, almonds, peanuts, corn, rye, fish or beef tallow. Oils are for example described in the following documents EP1466878; EP2090623; EP2135851 and FR2995891.
Dans le cas d'une peinture en phase aqueuse, le liant peut être issu d'au moins une résine renouvelable d'origine naturelle. La résine peut être à l'état naturel c'est-à-dire utilisée telle qu'elle est obtenue par la source naturelle, éventuellement purifiée, ou peut être une résine naturelle modifiée, c'est-à-dire transformée chimiquement. Des exemples de telles résines sont les résines terpéniques, notamment extraites de bois, les alkydes issus d'huiles végétales, les accroïdes issus d'huiles végétales, ou les polysaccharides tels que la cellulose et l'amidon. D'autres exemples de résines sont des résines phénoliques telles que les tannins et les lignines.  In the case of an aqueous phase paint, the binder may be derived from at least one renewable resin of natural origin. The resin may be in the natural state that is to say used as it is obtained by the natural source, optionally purified, or may be a modified natural resin, that is to say chemically transformed. Examples of such resins are terpene resins, in particular extracted from wood, alkyds derived from vegetable oils, additives derived from vegetable oils, or polysaccharides such as cellulose and starch. Other examples of resins are phenolic resins such as tannins and lignins.
Le solvant peut être issu, au moins en partie, de ressources renouvelables d'origine végétale ou animale, mais peut aussi être d'origine pétrochimique. Dans le cas d'une peinture en phase solvant organique, il représente entre 15% et 40% en poids, et de préférence entre 20% et 35% en poids de la formulation. The solvent may be derived, at least in part, from renewable resources of plant or animal origin, but may also be of petrochemical origin. In the case of an organic solvent phase paint, it represents between 15% and 40% by weight, and preferably between 20% and 35% by weight of the formulation.
Dans le cas d'une peinture en phase aqueuse, l'eau représente entre 30% et 60% en poids, et de préférence entre 40% et 55% en poids de la formulation. Lorsqu'un ou plusieurs co-solvants organiques sont ajoutés à l'eau, celui-ci ou ceux-ci représentent moins de 10% et de préférence moins de 5% en poids de la formulation.  In the case of an aqueous phase paint, the water represents between 30% and 60% by weight, and preferably between 40% and 55% by weight of the formulation. When one or more organic co-solvents are added to the water, the latter or they represent less than 10% and preferably less than 5% by weight of the formulation.
Comme exemples de solvants organiques utilisés avec une peinture en phase solvant organique selon l'invention, on peut citer : les solvants aliphatiques (alcanes et alcènes), aromatiques (toluène, xylène), les alcools (éthanol, méthanol, etc), les cétones (acétone, méthylisobutylcétone, etc), les éthers, les solvants halogénés (chloroforme, etc) ou autres, ainsi que des mélanges de ces constituants.  As examples of organic solvents used with an organic solvent phase paint according to the invention, mention may be made of: aliphatic solvents (alkanes and alkenes), aromatic solvents (toluene, xylene), alcohols (ethanol, methanol, etc.), ketones (acetone, methyl isobutyl ketone, etc.), ethers, halogenated solvents (chloroform, etc.) or others, as well as mixtures of these constituents.
Les charges peuvent comprendre des charges minérales telles que par exemple le quartz, le mica, le talc, la stéatite, le feldspath, les kaolins et les silicates en général, le phosphate de calcium, le sulfate de baryum, la ferrite de baryum, le carbonate de calcium et/ou de magnésium, la craie, la silice et la dolomite. Elles peuvent représenter entre 25% et 60% en poids, et de préférence entre 30% et 50% du poids de la formulation.  The fillers may comprise mineral fillers such as, for example, quartz, mica, talc, steatite, feldspar, kaolin and silicates in general, calcium phosphate, barium sulfate, barium ferrite, calcium carbonate and / or magnesium, chalk, silica and dolomite. They can represent between 25% and 60% by weight, and preferably between 30% and 50% of the weight of the formulation.
Dans le cas d'une peinture en phase solvant organique, la formulation peut également comprendre un ou plusieurs additifs. Les additifs peuvent comprendre ou consister en les additifs suivants qui sont bien connus de l'homme de l'art : agent(s) de rhéologie, agent(s) anti-UV, agent(s) antifongique(s), agent(s) biocide(s), agent(s) antimousse, agent(s) dispersant(s), agent(s) mouillant(s), pigment(s) de coloration et pigment(s) anticorrosion.  In the case of an organic solvent phase paint, the formulation may also comprise one or more additives. The additives may comprise or consist of the following additives which are well known to those skilled in the art: rheology agent (s), anti-UV agent (s), antifungal agent (s), agent (s) ) biocide (s), antifoaming agent (s), dispersing agent (s), wetting agent (s), coloring pigment (s) and anti-corrosion pigment (s).
Dans le cas d'une peinture en phase aqueuse, la formulation peut également comprendre un (ou des) agent(s) de stabilisation de l'émulsion.  In the case of an aqueous phase paint, the formulation may also comprise an agent (s) for stabilizing the emulsion.
Ces additifs représentent au total moins de 20% en poids de la formulation, chacun des additifs présents dans la formulation représentant moins de 5% en poids et de préférence moins de 3% en poids de la formulation.  These additives represent in total less than 20% by weight of the formulation, each of the additives present in the formulation representing less than 5% by weight and preferably less than 3% by weight of the formulation.
Sur la Figure 2 est illustré un élément selon un second mode de réalisation de l'invention. Ce mode de réalisation diffère de celui de la Figure 1 uniquement par ce qui suit. Les éléments analogues portent les mêmes références.  In Figure 2 is illustrated an element according to a second embodiment of the invention. This embodiment differs from that of Figure 1 only by the following. Similar elements bear the same references.
La couche de peinture 13 est déposée directement sur la surface extérieure du corps de base 7. La couche de revêtement métallique 1 1 est donc omise et le revêtement 9 extérieur est constitué de la couche de peinture 13.  The paint layer 13 is deposited directly on the outer surface of the base body 7. The metal coating layer 1 1 is omitted and the outer coating 9 consists of the paint layer 13.
Par ailleurs, une couche de peinture intérieure 14 est disposée sur la surface intérieure du corps de base 7. Cette couche de peinture 14 est en contact avec la surface intérieure du corps de base 7 et forme la surface intérieure de l'élément 1 en contact avec le fluide 5 circulant dans l'élément 1 . Furthermore, an inner paint layer 14 is disposed on the inner surface of the base body 7. This paint layer 14 is in contact with the surface internal of the base body 7 and forms the inner surface of the element 1 in contact with the fluid 5 flowing in the element 1.
La composition de la peinture de la couche de peinture 14 est identique à la composition de la peinture de la couche de peinture 13.  The composition of the paint of the paint layer 14 is identical to the composition of the paint of the paint layer 13.
Le procédé de fabrication de l'élément selon l'invention comprend les étapes suivantes :  The method of manufacturing the element according to the invention comprises the following steps:
Tout d'abord, on fabrique et on fournit le corps de base 7 par exemple par coulée dans un moule.  Firstly, the base body 7 is manufactured and supplied, for example by casting in a mold.
Ensuite, le cas échéant, on applique la couche de revêtement 1 1 sur la surface du corps de base 7.  Then, if necessary, the coating layer 11 is applied to the surface of the base body 7.
Puis, on chauffe le corps de base 7, muni le cas échéant de la couche de revêtement métallique 1 1 , à une température comprise entre 40°C et 80°C.  Then, the base body 7, equipped optionally with the metal coating layer 1 1, is heated to a temperature between 40 ° C and 80 ° C.
Ensuite, on applique la peinture sur le corps de base 7, respectivement sur la couche de revêtement 1 1 , pendant que la peinture est à une température comprise entre 20°C et 40°C et pendant que le corps de base, et respectivement également la couche de revêtement 1 1 , est à une température comprise entre 40°C et 80°C.  Then, the paint is applied to the base body 7, respectively to the coating layer 11, while the paint is at a temperature between 20 ° C and 40 ° C and while the base body, and respectively also the coating layer 11 is at a temperature between 40 ° C and 80 ° C.
Finalement on fait sécher la couche de peinture 13 ainsi déposée à une température de séchage comprise entre 70° et 90°C pendant 45 min à 90 min dans le cas d'une peinture en phase solvant organique et pendant 15 min à 45 min dans le cas d'une peinture en phase aqueuse.  Finally, the layer of paint 13 thus deposited is dried at a drying temperature of between 70 ° and 90 ° C. for 45 minutes to 90 minutes in the case of an organic solvent phase paint and for 15 minutes to 45 minutes in the case of an aqueous phase paint.
La peinture selon l'invention peut être appliquée par pulvérisation à l'aide d'un pistolet de projection, préférentiellement par un procédé de type sans air (« airless »), par trempé dans un bain de peinture, ou par brossage.  The paint according to the invention can be applied by spraying with the aid of a spray gun, preferably by an airless type process, by dipping in a paint bath, or by brushing.
Dans le cas d'une peinture utilisée comme barrière anticorrosion appliquée directement sur le corps de base métallique de l'élément de canalisation, de la pièce de voirie ou de robinetterie, comme c'est le cas par exemple pour les couches de peinture 13 et 14 du mode de réalisation de la Figure 2, l'épaisseur de la couche de peinture est alors comprise entre 200 μηι et 500 μηι, et de préférence entre 250 μηι et 400 μηι.  In the case of a paint used as an anti-corrosion barrier applied directly to the metal base body of the pipe element, the road piece or tap, as is the case for example for the paint layers 13 and 14 of the embodiment of Figure 2, the thickness of the paint layer is then between 200 μηι and 500 μηι, and preferably between 250 μηι and 400 μηι.
Lorsque la peinture est utilisée comme bouche-pores d'un revêtement métallique anticorrosion préalablement appliqué sur un élément de canalisation, comme c'est le cas par exemple pour la couche de peinture 13 du mode de réalisation de la Figure 1 , l'épaisseur de la couche de peinture est alors comprise entre 70 μηι et 200 μηι, et de préférence entre 80 μηι et 150 μηι.  When the paint is used as a filler of an anticorrosive metal coating previously applied to a pipe element, as is the case for example for the paint layer 13 of the embodiment of FIG. 1, the thickness of the paint layer is then between 70 μηι and 200 μηι, and preferably between 80 μηι and 150 μηι.
Les constituants de la peinture rendent l'élément écologique tout en garantissant des propriétés acceptables de tenue dans le temps. L'invention peut aussi comporter généralement les étapes suivantes : The constituents of the paint make the element ecological while guaranteeing acceptable properties of durability. The invention may also generally comprise the following steps:
- fournir un élément comprenant un corps de base 7 métallique, notamment en fonte, et une couche de peinture 13 s'étendant sur au moins une partie du corps de base, providing an element comprising a metallic base body 7, in particular made of cast iron, and a paint layer 13 extending over at least a part of the base body,
- l'élément comprenant une couche de revêtement 1 1 métallique anticorrosion, en particulier à base d'un métal sacrificiel tel que du zinc ou un alliage de zinc ou un pseudoalliage de zinc, disposée sur la surface du corps de base 7, the element comprising an anticorrosive metal coating layer, in particular based on a sacrificial metal such as zinc or a zinc alloy or a zinc pseudoalloy, disposed on the surface of the base body 7,
- la couche de peinture 13 étant disposée sur la surface de la couche de revêtement 1 1 , et  the paint layer 13 being disposed on the surface of the coating layer 1 1, and
- réguler et/ou limiter la vitesse de consommation de la couche de revêtement 1 1 métallique anticorrosion par la porosité de la couche de peinture.  regulating and / or limiting the rate of consumption of the anticorrosive metal coating layer by the porosity of the paint layer.

Claims

REVENDICATIONS
1 .- Elément ayant : 1 .- Element having:
- un corps de base (7) métallique, notamment en fonte,  a base body (7) made of metal, in particular of cast iron,
- une couche de peinture (13) s'étendant sur au moins une partie du corps de base,  a paint layer (13) extending over at least a portion of the base body,
- la peinture de la couche de peinture ayant une formulation comprenant un liant, caractérisé en ce que le liant comprend ou est constitué en totalité de matières issues de ressources naturelles renouvelables d'origine végétale ou animale.  - The painting of the paint layer having a formulation comprising a binder, characterized in that the binder comprises or consists entirely of materials from renewable natural resources of plant or animal origin.
2.- Elément selon la revendication 1 , dans lequel le liant représente entre 20% et 2. Element according to claim 1, wherein the binder represents between 20% and
50% en poids, notamment entre 25% et 40% en poids de la formulation de la peinture. 50% by weight, especially between 25% and 40% by weight of the formulation of the paint.
3. - Elément selon la revendication 1 ou 2, dans lequel le liant comprend :  3. Element according to claim 1 or 2, wherein the binder comprises:
- au moins une résine issue de ressources naturelles renouvelables, de préférence d'origine végétale, et  at least one resin derived from renewable natural resources, preferably of plant origin, and
- au moins une huile d'origine naturelle, de préférence végétale.  at least one oil of natural origin, preferably vegetable.
4. - Elément selon la revendication 3, dans lequel  4. - Element according to claim 3, wherein
- la résine est soit naturelle soit naturelle modifiée, la résine comprenant par exemple une résine accroïde, une résine dammar ou une résine de colophane, et  the resin is either natural or naturally modified, the resin comprising, for example, an additive resin, a dammar resin or a rosin resin, and
- l'huile est par exemple choisie parmi les huiles de colza, de tournesol, de soja, d'olives, de palme, de lin, de ricin, de coton, de bois, de noix ou noisettes, d'amandes, d'arachides, de maïs, de seigle, de poissons ou de suif de bœuf.  the oil is, for example, chosen from rapeseed, sunflower, soybean, olive, palm, linseed, castor oil, cotton, wood, nuts or hazelnuts, almonds, peanuts, corn, rye, fish or beef tallow.
5. - Elément selon la revendication 1 ou 2, dans lequel le liant est issu avantageusement d'au moins une résine d'origine naturelle modifiée ou non, telle que par exemple, les résines terpéniques, notamment extraites de bois, les résines phénoliques, notamment les tannins et lignines, les résines alkydes issues d'huiles végétales, les résines accroïdes issues d'huiles végétales ou les polysaccharides, notamment la cellulose ou l'amidon.  5. - Element according to claim 1 or 2, wherein the binder is preferably derived from at least one resin of natural origin modified or not, such as, for example, terpene resins, in particular extracted from wood, phenolic resins, in particular tannins and lignins, alkyd resins derived from vegetable oils, additive resins derived from vegetable oils or polysaccharides, especially cellulose or starch.
6. - Elément selon l'une quelconque des revendications 1 à 5, dans lequel le liant est dépourvu de bisphénol, même à l'état de traces.  6. Element according to any one of claims 1 to 5, wherein the binder is free of bisphenol, even in trace amounts.
7.- Elément selon l'une quelconque des revendications 1 à 6, dans lequel la peinture est soit en phase solvant organique, soit en phase aqueuse.  7. Element according to any one of claims 1 to 6, wherein the paint is either in the organic solvent phase or in the aqueous phase.
8.- Elément selon la revendication 7, dans lequel  8. Element according to claim 7, wherein
soit la peinture est en phase solvant organique, le solvant organique étant issu, au moins en partie, de ressources naturelles renouvelables d'origine végétale ou animale, ou étant au moins en partie d'origine pétrochimique, et dans lequel le solvant représente entre 15% et 40% en poids, et de préférence entre 20% et 35% en poids de la formulation, the paint is in the organic solvent phase, the organic solvent being derived, at least in part, from renewable natural resources of vegetable or animal origin, or being at least partly of petrochemical origin, and in which the solvent represents between 15% and 40% by weight, and preferably between 20% and 35% by weight of the formulation,
soit la peinture est en phase aqueuse et l'eau représente entre 30% et 60% en poids, et de préférence entre 40% et 55% en poids de la formulation, en particulier lorsque la peinture comprend au moins un ou plusieurs co-solvants organiques en plus de l'eau, le ou les co-solvant(s) représentent moins de 10% et de préférence moins de 5% en poids de la formulation.  either the paint is in aqueous phase and the water is between 30% and 60% by weight, and preferably between 40% and 55% by weight of the formulation, in particular when the paint comprises at least one or more co-solvents in addition to water, the cosolvent (s) represent less than 10% and preferably less than 5% by weight of the formulation.
9. - Elément selon la revendication 8, dans lequel le solvant organique est choisi parmi les solvants aliphatiques, en particulier les alcanes et alcènes, les solvants aromatiques, en particulier le toluène et le xylène, les alcools, en particulier l'éthanol et le méthanol, les cétones, en particulier l'acétone et la méthylisobutylcétone, les éthers, les solvants halogénés, notamment le chloroforme, ainsi que des mélanges de ces constituants.  9. - Element according to claim 8, wherein the organic solvent is chosen from aliphatic solvents, in particular alkanes and alkenes, aromatic solvents, in particular toluene and xylene, alcohols, in particular ethanol and methanol, ketones, in particular acetone and methyl isobutyl ketone, ethers, halogenated solvents, in particular chloroform, as well as mixtures of these constituents.
10. - Elément selon l'une quelconque des revendications 1 à 9,  10. Element according to any one of claims 1 to 9,
dans lequel la peinture comprend une charge comprenant notamment au moins l'un des composants suivants : un silicate, en particulier du quartz, du mica, du talc, de la stéatite, du feldspath ou du kaolin, de la silice, du phosphate de calcium, du sulfate de baryum, de la ferrite de baryum, du carbonate de calcium et/ou de magnésium, de la dolomite et de la craie, et  wherein the paint comprises a filler comprising in particular at least one of the following components: a silicate, in particular quartz, mica, talc, steatite, feldspar or kaolin, silica, calcium phosphate , barium sulfate, barium ferrite, calcium carbonate and / or magnesium carbonate, dolomite and chalk, and
dans lequel en particulier la charge minérale constitue entre 25% et 60% en poids, et de préférence entre 30% et 50% en poids de la formulation.  in which in particular the mineral filler constitutes between 25% and 60% by weight, and preferably between 30% and 50% by weight of the formulation.
1 1 . - Elément selon l'une quelconque des revendications 1 à 10, dans lequel la peinture comprend au moins un additif choisi parmi : un ou des agent(s) de rhéologie, un ou des agent(s) anti-UV, un ou des agent(s) antifongique(s), un ou des agent(s) biocide(s), un ou des agent(s) anti-mousse, un ou des agent(s) dispersant(s), un ou des agent(s) mouillant(s), un ou des pigment(s) de coloration et un ou des pigment(s) anticorrosion, et dans lequel  1 1. Element according to any one of claims 1 to 10, in which the paint comprises at least one additive chosen from: one or more rheology agents, one or more UV-stabilizing agent (s), one or more agents (s) antifungal agent (s), biocidal agent (s), antifoam agent (s), dispersant agent (s), agent (s) wetting agent (s), one or more coloring pigment (s) and one or more anti-corrosion pigment (s), and wherein
la formulation peut comprendre un ou des agent(s) de stabilisation de l'émulsion, et dans lequel de préférence le ou les additifs représentent au total moins de 20% en poids de la formulation,  the formulation may comprise one or more agents for stabilizing the emulsion, and in which preferably the additive or additives represent in total less than 20% by weight of the formulation,
chacun des additifs présents dans la formulation représentant moins de 5% en poids et de préférence moins de 3% en poids de la formulation.  each of the additives present in the formulation representing less than 5% by weight and preferably less than 3% by weight of the formulation.
12. - Elément selon l'une quelconque des revendications 1 à 1 1 , dans lequel soit l'élément comprend une couche de revêtement (1 1 ), notamment métallique anticorrosion, en particulier à base d'un métal sacrificiel tel que du zinc ou un alliage de zinc ou un pseudo-alliage de zinc, disposée sur la surface du corps de base (7) et la couche de peinture (13) est disposée sur la surface de la couche de revêtement (1 1 ), soit la couche de peinture (13, 14) est disposée sur la surface du corps de base12. - Element according to any one of claims 1 to 1 1, wherein either the element comprises a coating layer (1 1), in particular corrosion-resistant metal, in particular based on a sacrificial metal such as zinc or an alloy of zinc or pseudo-zinc alloy, disposed on the surface of the base body (7) and the paint layer (13) is disposed on the surface of the coating layer (1 1), ie the paint layer (13). , 14) is disposed on the surface of the basic body
(7). (7).
13. Elément selon l'une quelconque des revendications précédentes, dans lequel la couche de peinture (13) est poreuse, en particulier, dans le cas où l'élément comprend une couche de revêtement (1 1 ) à base d'un métal sacrificiel, la couche de peinture régule et/ou limite la vitesse de consommation de la couche de revêtement.  Element according to any one of the preceding claims, wherein the paint layer (13) is porous, in particular, in the case where the element comprises a coating layer (1 1) based on a sacrificial metal. the paint layer regulates and / or limits the rate of consumption of the coating layer.
14. - Elément selon l'une quelconque des revendications précédentes, dans lequel l'élément est un élément de canalisation (1 ), une pièce de voirie ou une pièce de robinetterie et, dans le cas où l'élément est un élément de canalisation, l'élément est notamment un tuyau, un raccord ou une pièce de jonction adaptée à l'accouplement de tuyaux lors du montage ou de la réparation d'une canalisation.  14. - Element according to any one of the preceding claims, wherein the element is a pipe element (1), a piece of road or a valve and, in the case where the element is a pipe element , the element is in particular a pipe, a connection or a connecting piece adapted to the coupling of pipes during the assembly or the repair of a pipe.
15. - Procédé de fabrication d'un élément selon l'une quelconque des revendications précédentes, comprenant les étapes successives consistant à :  15. - A method of manufacturing an element according to any one of the preceding claims, comprising the successive steps of:
- fournir le corps de base,  - provide the basic body,
- revêtir le corps de base de la couche de peinture pendant que la peinture est à une température comprise entre 20°C et 40°C et pendant que le corps de base, et éventuellement également la couche de revêtement (1 1 ), est à une température comprise entre 40°C et 80°C, et  - coat the base body with the paint layer while the paint is at a temperature between 20 ° C and 40 ° C and while the base body, and possibly also the coating layer (1 1), is a temperature between 40 ° C and 80 ° C, and
- faire sécher le corps de base revêtu à une température comprise entre 70° et 90°C pendant 45 min à 90 min dans le cas d'une peinture en phase solvant organique et pendant 15 min à 45 min dans le cas d'une peinture en phase aqueuse.  - Dry the coated base body at a temperature between 70 ° and 90 ° C for 45 min to 90 min in the case of an organic solvent phase paint and for 15 minutes to 45 min in the case of a paint in the aqueous phase.
EP17748431.8A 2016-07-25 2017-07-24 Metal element covered with a layer of paint and corresponding production method Pending EP3487943A1 (en)

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FR1657137A FR3054238B1 (en) 2016-07-25 2016-07-25 CORRESPONDING ELEMENT AND MANUFACTURING METHOD
PCT/EP2017/068567 WO2018019744A1 (en) 2016-07-25 2017-07-24 Metal element covered with a layer of paint and corresponding production method

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RU2019101754A3 (en) 2020-10-27
RU2019101754A (en) 2020-07-23
RU2756520C2 (en) 2021-10-01
FR3054238B1 (en) 2020-06-12
BR112019001189B8 (en) 2023-01-31
BR112019001189A2 (en) 2019-04-30
BR112019001189B1 (en) 2023-01-17
FR3054238A1 (en) 2018-01-26
CN109890912A (en) 2019-06-14
WO2018019744A1 (en) 2018-02-01

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