WO2018179652A1 - 防食構造体 - Google Patents

防食構造体 Download PDF

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Publication number
WO2018179652A1
WO2018179652A1 PCT/JP2017/046998 JP2017046998W WO2018179652A1 WO 2018179652 A1 WO2018179652 A1 WO 2018179652A1 JP 2017046998 W JP2017046998 W JP 2017046998W WO 2018179652 A1 WO2018179652 A1 WO 2018179652A1
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WIPO (PCT)
Prior art keywords
anticorrosion
mass
mastic
oil
layer
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PCT/JP2017/046998
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English (en)
French (fr)
Japanese (ja)
Inventor
洋平 安藤
一之 木内
丈一 笠松
達大 西口
Original Assignee
日東電工株式会社
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Application filed by 日東電工株式会社 filed Critical 日東電工株式会社
Priority to MYPI2019005566A priority Critical patent/MY196639A/en
Priority to CN201780088710.6A priority patent/CN110431255B/zh
Publication of WO2018179652A1 publication Critical patent/WO2018179652A1/ja

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    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
    • 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

Definitions

  • the present invention relates to an anticorrosion structure.
  • metal pipes are used as gas pipes, water pipes, pipes for transporting liquid raw materials such as oil, and the like.
  • an anticorrosion structure covering the metal members is formed.
  • an anticorrosion structure As a general method for forming an anticorrosion structure, a method using an anticorrosion tape in which an anticorrosive compound is supported on a belt-like base material sheet is known, and the anticorrosion tape is used to prevent corrosion with the anticorrosion tape wound around the surface of the metal member. A method for forming a sheet layer is widely known. Further, as the anticorrosion tape used for the formation of such an anticorrosion structure, it is known that an anticorrosive compound containing a base oil and an inorganic filler is supported on a strip-shaped non-woven fabric, and the base oil is rust-proof. What used the petrolatum excellent in the effect is known.
  • the anticorrosion tape in order to protect the anticorrosion sheet layer formed by the anticorrosion tape, the anticorrosion tape is further coated with a paint to further form an overcoat layer called a topcoat layer or the like. (See Patent Document 1 below).
  • This invention makes it a subject to satisfy the said request, and makes it a subject to provide the anticorrosion structure which can suppress the crack of an anticorrosion sheet layer, suppressing the isolation
  • the anticorrosion structure according to the present invention is an anticorrosion structure comprising an anticorrosion sheet layer A covering a metal member and a protective layer B covering the anticorrosion sheet layer A,
  • the anticorrosion sheet layer A is formed of an anticorrosion sheet,
  • the anticorrosion sheet has a base material and an anticorrosive compound impregnated in the base material,
  • the anticorrosion sheet contains unsaturated oil as the anticorrosion compound,
  • the protective layer B is formed by a top coat material,
  • the UV transmittance of the protective layer B is 1% or less.
  • the anticorrosion structure according to the present embodiment has two or more layers. Moreover, as shown in FIG. 1, the anticorrosion structure 1 which concerns on this embodiment is provided with the anticorrosion sheet layer A which covers the metal members 20, and the protective layer B which covers this anticorrosion sheet layer A.
  • the anticorrosion sheet layer A is formed of an anticorrosion sheet.
  • the protective layer B is formed of a top coat material. Since the anticorrosion structure 1 according to the present embodiment includes the anticorrosion sheet layer A, the thickness of the anticorrosion structure 1 itself is easily increased, and as a result, drying inside the anticorrosion structure 1 is easily suppressed. And the anticorrosion structure 1 which concerns on this embodiment has the advantage that it becomes easy to exhibit anticorrosion performance.
  • the anticorrosion structure 1 according to the present embodiment can suppress the deterioration of the anticorrosion sheet layer A, and as a result, has an advantage of excellent weather resistance. Moreover, the anticorrosion structure 1 which concerns on this embodiment has the advantage that it can suppress that the anticorrosion sheet layer A peels by providing the protective layer B. FIG. Furthermore, the anticorrosion structure 1 according to the present embodiment has the advantage of providing the protective layer B and having excellent friction resistance.
  • the anticorrosion structure 1 according to the present embodiment further includes an anticorrosion paste layer C (hereinafter also referred to as “undercoat layer C”) formed of an anticorrosion paste (hereinafter also referred to as “undercoat material”).
  • the anticorrosion paste layer C is formed closer to the metal member 20 than the anticorrosion sheet layer A, and is in contact with the surface of the metal member 20.
  • the anticorrosion structure 1 according to the present embodiment has an advantage that the anticorrosion structure 1 is easily adhered to the metal member 20 and has excellent anticorrosion performance.
  • the anticorrosion structure 1 which concerns on this embodiment is further equipped with the anticorrosion mastic layer D currently formed with anticorrosion mastic, when the surface of the metal member 20 has at least one of an uneven
  • the anticorrosion mastic layer D is formed closer to the metal member than the anticorrosion sheet layer A is. Further, the anticorrosion mastic layer D is disposed between the anticorrosion sheet layer A and the anticorrosion paste layer C.
  • the anticorrosion structure 1 according to the present embodiment has an advantage that the anticorrosion sheet layer A can be easily constructed by providing the anticorrosion mastic layer D in accordance with the shape of the concavo-convex portion and the deformed portion of the metal member 20.
  • the anticorrosion structure 1 according to the present embodiment has good adhesion to the metal member 20 by providing the anticorrosion mastic layer D in accordance with the shape of the concavo-convex part or the irregular part of the metal member 20. Has the advantage of becoming.
  • the anticorrosion structure 1 which concerns on this embodiment has the advantage that the construction time of the anticorrosion structure 1 can be shortened by providing the said anticorrosion mastic layer D. FIG. That is, when the anticorrosion structure does not include the anticorrosion mastic layer, when the anticorrosion sheet is wound around the metal member 20, the metal member 20 and the anticorrosion sheet at the uneven portion or the deformed portion of the metal member 20, or the anticorrosion Air easily enters between the sheets.
  • the anticorrosion structure 1 in order to improve the anti-corrosion performance, an operation of winding the anti-corrosion sheet while making the cut in the anti-corrosion sheet and letting out air is generated.
  • the anticorrosion structure 1 according to the present embodiment includes the anticorrosion mastic layer D, thereby making it easier to avoid work for escaping air, and reducing the construction time of the anticorrosion structure 1.
  • the anticorrosion structure 1 according to the present embodiment has the above-described advantages, so that the anticorrosion property can be easily maintained.
  • the metal member 20 is used as a pipeline for transporting fluids.
  • the metal member 20 includes a plurality of cylindrical tubes having flange portions 21, and the tubes are connected by the flange portions 21.
  • the flange portions 21 of adjacent pipes are fixed with bolts 22 and nuts 23. That is, the metal member 20 has a cylindrical shape, and the outer surface is uneven by the flange portion 21, the bolt 22, the nut 23, and the like.
  • the undercoat layer C can be formed by applying an undercoat material to the surface of the metal member 20. Specifically, the undercoat layer C can be formed by thinly applying an undercoat material to the entire outer surface of the cylindrical metal member 20. On the outer surface of the undercoat layer C, irregularities are formed by the irregularities of the metal member.
  • the undercoat layer C is usually formed to have an average thickness of 0.01 to 10 mm.
  • the first anticorrosive compound (anticorrosive paste) (undercoat material) C constituting the undercoat layer C contains an organic binder C1 containing a rust inhibitor and the like, and an inorganic filler C2.
  • the undercoat material preferably has a high “consistency” value in the normal temperature range in consideration of workability when spreading on the surface of the metal member 20 and filling properties.
  • the “consistency” means a value measured based on “JIS Petroleum Wax 5.10 Consistency Test Method” according to JIS K2235-1991.
  • the undercoat material of this embodiment preferably has a “consistency” at 20 ° C. of 150 or more, more preferably 200 or more, and particularly preferably 250 or more.
  • the primer of this embodiment preferably has a “consistency” at 0 ° C. of 100 or more, more preferably 150 or more, and particularly preferably 200 or more.
  • the undercoat material has a high “consistency” value in consideration of firmly fixing the anticorrosion tape 12 to the metal member.
  • the undercoat material preferably has a “consistency” of a certain level or less even when heated.
  • the undercoat material of this embodiment preferably has a “consistency” at 20 ° C. of 400 or less, more preferably 350 or less, and particularly preferably 300 or less.
  • the “priming” at 40 ° C. of the undercoat material is preferably 500 or less, more preferably 450 or less, and particularly preferably 400 or less.
  • the undercoat material of this embodiment has a low temperature sensitivity represented by the following formula (2), where N 0 is the “consistency” value at 0 ° C. and N 20 is the “consistency” value at 20 ° C.
  • the ratio is preferably 0.6 or more, and more preferably 0.75 or more.
  • Low temperature temperature ratio [N 0 / N 20 ] (2)
  • the undercoat material of the present embodiment preferably has a high temperature sensitivity ratio of 2 or less represented by the following formula (3) when the value of “consistency” at 40 ° C. is N 40, and 1.5 The following is more preferable.
  • the main component of the organic binder C1 is polybutene in order to exhibit such temperature characteristics. Moreover, about the said inorganic filler mentioned later, it is the bentonite particle
  • the polybutene As the polybutene, a general one can be adopted, which is a copolymer obtained by reacting isobutene as a main component and partially reacting 1-butene or 2-butene with liquid chain carbonization at room temperature (23 ° C.). Hydrogen compounds can be employed.
  • the polybutene is JIS K2269: 1987 “pour point of crude oil and petroleum products and cloud point test of petroleum products, considering workability when spreading a primer on the surface of a metal member in a low temperature environment such as outdoors in winter.
  • the pour point measured based on the “method” is preferably 5.0 ° C. or less, and more preferably 2.5 ° C. or less.
  • the polybutene preferably has a pour point of ⁇ 7.5 ° C. or higher, preferably ⁇ 5.0 ° C. or higher, in consideration of suppressing excessive fluidity from being exerted on the undercoat material. Is more preferable.
  • the polybutene, JIS K2283: 2000 - kinematic viscosity at 40 ° C. as measured on the basis of "crude oil and petroleum products kinematic viscosity and calculation of viscosity index" is less than 10 mm 2 / s or more 3000 mm 2 / s Is preferably 50 mm 2 / s or more and 1500 mm 2 / s or less.
  • the number average molecular weight of the polybutene is preferably 300 to 3000, more preferably 500 to 2000, even more preferably 700 to 2000, and particularly preferably 1000 to 2000.
  • the “number average molecular weight” of polybutene in the present specification means a molecular weight determined by gel permeation chromatography (GPC). More specifically, the “number average molecular weight” means a value measured under the following conditions.
  • GPC device HLC-8120GPC (column: TSKgel SuperHZM-H / HZ4000 / HZ3000 / HZ2000, column size: 6.0 mm ID ⁇ 150 mm), detector: differential refractive index detector (RI), GPC measurement conditions manufactured by Tosoh Corporation: Mobile phase tetrahydrofuran, flow rate 0.6 mL / min, column temperature 40 ° C., sample concentration 1.0 g / L, injection volume 20 ⁇ L
  • the organic binder in the undercoat material preferably contains 40% by mass or more of the above polybutene, more preferably 45% by mass or more, and even more preferably 50% by mass or more. preferable.
  • the organic binder may further contain polyisoprene that is liquid at normal temperature, polybutadiene that is liquid at normal temperature, and the like as components other than polybutene.
  • the preferred pour point and kinematic viscosity values of polyisoprene and polybutadiene are the same as those of the polybutene.
  • the organic binder can further contain paraffinic oil, naphthenic oil, aroma oil, various waxes and the like as appropriate.
  • said rust preventive agent which comprises an organic binder
  • an inorganic rust preventive agent and an organic rust preventive agent are mentioned, for example.
  • the inorganic rust preventive include chromate, nitrite, silicate, phosphate, and polyphosphate.
  • the organic rust preventive include tannic acid, carboxylic acid (oleic acid, dimer acid, naphthenic acid, etc.), carboxylic acid metal soap (lanolin Ca, naphthenic acid Zn, oxidized wax Ca, oxidized wax Ba, etc.), sulfone.
  • esters esters obtained by reacting higher fatty acids with glycerin, sorbitan monoisostearate, sorbitan monooleate, etc.
  • the said undercoat material contain a vaporizable rust preventive agent with the said tannic acid.
  • tannic acid tannic acid derived from pentaploid is preferable.
  • the vaporizable rust preventive include various salts of amines (for example, nitrites, carboxylates, chromates) and esters of carboxylic acids.
  • viscosity modifiers for example, modified rosin resins such as xylene resin, rosin, polymerized rosin, hydrogenated rosin and rosin ester; terpene resins such as terpene resin, terpene phenol resin and rosin phenol resin Aliphatic, aromatic and alicyclic petroleum resins; coumarone resins, styrene resins, alkylphenol resins, etc.
  • the organic binder may contain a coupling agent or a surfactant in order to improve the affinity between the inorganic filler and the oil contained in the organic binder.
  • the coupling agent include silane coupling agents and titanate coupling agents.
  • the surfactant include fatty amines.
  • As the fatty amine a fatty amine having 10 or more carbon atoms is preferable. The carbon number can be measured by liquid chromatography mass spectrometry (LC / MS) or gas chromatography mass spectrometry (GC / MS).
  • the organic binder may appropriately contain various additives such as an antioxidant, an anti-aging agent, an antifungal agent, an insect repellent, an antifungal agent, an antibacterial agent and a pigment.
  • the inorganic filler constituting the undercoat material together with the organic binder contains bentonite particles (hereinafter also referred to as “organic bentonite particles”) that have been organically treated as described above.
  • organic bentonite particles various types of ion-exchanged cation existing between bentonite crystal layers and quaternary ammonium ions such as bis (hydrogenated tallow) dimethylammonium chloride and cetyltrimethylammonium bromide are commercially available. ing.
  • Such a commercial product can be contained in the first anticorrosive compound of the present embodiment.
  • the inorganic filler may contain plate-like mineral particles such as mica particles and sericite particles.
  • the inorganic filler may contain titanium dioxide particles, zinc oxide particles, graphite particles, carbon black particles, bengara particles, and the like for the purpose of coloring the undercoat material.
  • the inorganic filler may contain talc particles, aluminum hydroxide particles, calcium carbonate particles, clay particles, aluminum oxide particles and the like.
  • the organic bentonite particles are an effective component for exerting thixotropy in the undercoat material.
  • the organic bentonite particles can be dispersed in the organic binder to form a gel even if the organic binder exhibits high fluidity. Moreover, even if an organic binder improves fluidity at the time of heating, the gel formed by dispersing the organic bentonite particles maintains a gel state unless excessive heating is performed. Moreover, since the gel exhibits thixotropy as described above, the apparent viscosity is greatly reduced when a shearing force is applied.
  • the organic bentonite particles are effective not only for making the undercoat material excellent in adhesion between the anticorrosive mastic layer D and the metal member 20, but also for providing the undercoat material on the surface of the metal member 20. It is also an effective component for improving workability when spreading on the surface.
  • the organic bentonite particles are preferably contained in the undercoat so that the content of the organic binder contained in the undercoat is 100 parts by mass, so as to be 5 parts by mass or more and 40 parts by mass or less. More preferably, it is contained in the primer so as to be 25 parts by mass or less. Furthermore, it is preferable that the organic bentonite particles are contained in the undercoat so that the ratio of the organic bentonite particles to the inorganic filler is 15% by mass or more and 40% by mass or less.
  • the organic bentonite particles When the organic bentonite particles have an excessively large particle size, the gelation performance to the organic binder is hardly exhibited even with the same blending amount. For this reason, the organic bentonite particles are preferably those in which 95% by mass or more passes through the sieve (screening residue 5% by mass or less) when sieved with 450 mesh (32 ⁇ m mesh) in the dry state. Also, not only organic bentonite particles, but also other inorganic fillers such as talc particles, if an excessively large particle size is used, it is an undercoat compared with the case where a fine particle size is used with the same blending amount. The material is likely to be sticky, and there is a risk that workability when spreading on the surface of the metal member will be reduced.
  • inorganic fillers other than organic bentonite particles, titanium dioxide particles, zinc oxide particles, graphite particles, carbon black particles, and bengara particles when the content of the organic binder is 100 parts by mass, It is preferably contained in the primer so as to be 0.1 parts by mass or more and 5 parts by mass or less, and more preferably contained in the primer so as to be 0.5 parts by mass or more and 1.5 parts by mass or less.
  • the talc particles are excellent in the effect of reinforcing the undercoat material and are effective for imparting shape retention to the undercoat material.
  • the talc particles are preferably contained so as to be 20 parts by mass or more and 80 parts by mass or less, and 30 parts by mass or more and 60 parts by mass. It is more preferable to make it contain so that it may become the following.
  • the talc particles are preferably contained in the undercoat so that the proportion of the talc particles in the inorganic filler is 55% by mass or more and 80% by mass or less.
  • the talc particles have a median diameter determined by a laser diffraction particle size distribution measuring device, preferably 1 ⁇ m or more and 100 ⁇ m or less, more preferably 1 ⁇ m or more and 50 ⁇ m or less, and even more preferably, in that the primer can be made excellent in workability. Is 10 ⁇ m or more and 40 ⁇ m or less. Further, as the talc particles, those in which 99% by mass or more pass through the sieve when sieving with a 75 ⁇ m mesh (less than 1% by mass of the sieve residue) are suitable.
  • the undercoat material preferably has a low temperature sensitivity as described above. Therefore, in preparing the undercoat material, before kneading all the blends, a mixture mainly composed of organic bentonite particles and an organic binder is once kneaded to prepare a gel-like material. It is preferable to carry out kneading by adding other blends.
  • the undercoat material thus prepared does not sag from the surface of the metal member at a temperature of about 40 to 50 ° C., for example, and exhibits good shape retention even in summer.
  • the anticorrosive mastic layer D is formed by filling the concave portions of the anticorrosive paste layer C with an anticorrosive mastic (second anticorrosive compound) in order to reduce the unevenness of the undercoat layer C. Further, the anticorrosion mastic layer D can fill a gap between the undercoat layer C and the anticorrosion sheet layer A, and can suppress corrosion of the metal member 20.
  • the anticorrosion mastic contains an oil as a binder (D1) and an inorganic filler (D2).
  • the binder contains a liquid rubber that is liquid at normal temperature and normal pressure (for example, 20 ° C., 1 atm).
  • the binder preferably contains the liquid rubber as a main component. More preferably, the oil component as the binder contains the liquid rubber in an amount of 60% by mass or more and 100% by mass or less of the entire oil component, and the liquid rubber is 70% by mass or more and 100% by mass or less of the entire oil component. It is more preferable to contain.
  • the said anticorrosion mastic contains the active hydrogen containing organic compound provided with the functional group which has active hydrogen as the said binder.
  • the active hydrogen-containing organic compound include organic compounds having a functional group such as a hydroxyl group, an amino group, a carboxy group, and a thiol group.
  • the anticorrosion mastic preferably contains the active hydrogen-containing organic compound in an amount of 5 to 40% by mass, more preferably 10 to 25% by mass.
  • the active hydrogen-containing organic compound preferably contains a hydroxyl group-containing organic compound having a hydroxyl group.
  • the liquid rubber is a hydroxyl group-containing organic compound from the viewpoint of easily making the anticorrosion mastic have desired characteristics.
  • the said active hydrogen containing organic compound may be contained in the said anticorrosion mastic as a component different from the said liquid rubber.
  • the active hydrogen-containing organic compound other than the liquid rubber include alcohols (eg, ethanol, methanol, etc.), amines (eg, methylamine, dimethylamine, etc.), saturated fatty acids (eg, butanoic acid, etc.). , Pentanoic acid, etc.), unsaturated fatty acids (for example, oleic acid, palmitoleic acid, etc.), cysteine and the like.
  • derivatives of alcohols, derivatives of amines, derivatives of saturated fatty acids, derivatives of unsaturated fatty acids, derivatives of cysteine, and the like are also included.
  • liquid rubber examples include liquid polyisoprene (D1a1), liquid polybutadiene (D1a2), liquid polyalphaolefin (D1b), liquid silicone rubber, liquid chloroprene rubber, liquid styrene / butadiene rubber, liquid acrylonitrile / butadiene rubber, liquid ethylene / Examples include propylene rubber, liquid urethane rubber, and liquid fluororubber.
  • the liquid rubber preferably contains a liquid rubber that is an active hydrogen-containing organic compound from the viewpoint that the anticorrosive mastic is easily made to have desired characteristics and that component separation is suppressed.
  • the liquid rubber preferably contains at least one of liquid polyisoprene and liquid polybutadiene.
  • the liquid rubber preferably contains at least one of liquid polyisoprene having a hydroxyl group at the molecular end and liquid polybutadiene having a hydroxyl group at the molecular end as the hydroxyl group-containing organic compound.
  • the said liquid rubber contains a liquid poly alpha olefin (D1b).
  • an organically treated bentonite powder (organic bentonite powder) (D2a) is contained in the anticorrosive mastic.
  • organic bentonite powder (D2a)
  • aluminum hydroxide powder (D2b)
  • calcium carbonate powder (D2c) are further contained in the anticorrosion mastic as the inorganic filler.
  • Liquid polyisoprene and liquid polybutadiene preferably have a hydroxyl group at the molecular end in order to prevent separation of the anticorrosion mastic, and more preferably have a hydroxyl group at both molecular ends.
  • the hydroxyl group is a functional group that is effective for constraining liquid polyisoprene and liquid polybutadiene to an organically-treated bentonite powder (hereinafter also referred to as “organic bentonite powder”) to form a gel state.
  • the liquid poly- ⁇ -olefin usually has a comb-shaped molecular structure, and in the present embodiment, it is used to adjust the oil content to an appropriate viscosity.
  • the oil component as the binder is preferably contained so that the total amount of the liquid polyisoprene and the liquid polybutadiene is 60% by mass or more and 100% by mass or less of the total oil content, and is 70% by mass or more and 100% by mass or less. It is more preferable.
  • the anti-corrosion mastic contains the liquid poly- ⁇ -olefin
  • the liquid poly- ⁇ -olefin can be used to adjust the binder to an appropriate viscosity to improve the workability of the anti-corrosion mastic. And it is preferable to make it contain so that it may become 10 to 40 mass parts with respect to 100 mass parts in total of the said liquid polybutadiene.
  • (D1) Binder (D1a1) Liquid Polyisoprene As the liquid polyisoprene, those having a general cis 1,4 bond of 80% or more can be used, and the number average molecular weight required in accordance with ASTM D 2503 is Those having a viscosity of 1000 to 4000 and a viscosity at 30 ° C. of 5 to 10 Pa ⁇ s are preferable. The number average molecular weight is determined according to ASTM D 2503. Moreover, about a viscosity, a viscosity in case a rotation speed is 50 rpm is measured with a B-type viscometer (single cylindrical rotational viscometer) (rotor: No. 4) (JIS Z8803: 2011).
  • the liquid polyisoprene preferably has a hydroxyl value of 30 to 60 mgKOH / g and a bromine value of 150 to 300 g / 100 g.
  • the value of “hydroxyl value” in the present embodiment is intended to be a value measured based on JIS K1557-1: 2007 “Plastics—Polyurethane raw material polyol test method—Part 1: Determination of hydroxyl value”. Yes.
  • the value of “bromine number” in the present embodiment is intended to be a value measured based on JIS K2605-1996 “Petroleum products—Bromine number test method—Electro titration method”.
  • the liquid polybutadiene As the liquid polybutadiene, 70% or more and 90% or less of the polybutadiene is 1,4 bonds, substantially does not contain 1,3 bonds, and the balance is 1,2 bonds. Some are preferred.
  • the liquid polybutadiene preferably has a number average molecular weight of 2000 to 4000 and a viscosity at 30 ° C. of 1 to 10 Pa ⁇ s. The number average molecular weight is determined according to ASTM D 2503. Moreover, about a viscosity, a viscosity in case a rotation speed is 50 rpm is measured with a B-type viscometer (single cylindrical rotational viscometer) (rotor: No. 4) (JIS Z8803: 2011).
  • the liquid polybutadiene preferably has a hydroxyl value of 40 to 60 mgKOH / g and a bromine value of 200 to 300 g / 100 g.
  • the liquid poly ⁇ -olefin is preferably a polymer obtained by polymerizing an ⁇ -olefin having 6 to 14 carbon atoms and having a total carbon number of 30 to 50 and a molecular weight of 500 to 600.
  • the liquid poly ⁇ -olefin preferably has a kinematic viscosity at 40 ° C. of 20 to 40 mm 2 / s. Note that the value of “kinematic viscosity” in the present embodiment is intended to be a value measured based on JIS K2283: 2000 “Crude oil and petroleum products—Kinematic viscosity test method and viscosity index calculation method”.
  • the anticorrosion mastic may contain a binder other than the liquid polyisoprene, the liquid polybutadiene, and the liquid poly ⁇ -olefin.
  • binders that can be contained in the anticorrosion mastic include various paraffinic oils and various naphthenic oils.
  • oily components such as various waxes may be included in the anticorrosion mastic.
  • the total content is preferably 10% by mass or less, and more preferably 5% by mass or less of the entire anticorrosion mastic.
  • the anticorrosive mastic may further contain additives such as a tackifier, a rust inhibitor, an antifungal agent, an antibacterial agent, an antioxidant, a light stabilizer, an ultraviolet absorber, a brightener, and a pigment as a binder.
  • the anticorrosion mastic preferably contains an antioxidant, a light stabilizer, an ultraviolet absorber, etc. when liquid polyisoprene or liquid polybutadiene containing a large amount of double bonds is contained. It is preferable to contain a hindered phenol-based antioxidant as the antioxidant in a proportion of about 0.5 parts by mass or more and 2 parts by mass or less with respect to 100 parts by mass in total of liquid polyisoprene and liquid polybutadiene.
  • the anticorrosion mastic preferably contains 0.05 to 1.00% by mass of a hindered phenol-based antioxidant.
  • Organic bentonite powder is preferably contained in the anticorrosive mastic to trap a binder such as liquid polyisoprene or liquid polybutadiene to gel the binder.
  • the organic bentonite powder is preferably contained in the anticorrosive mastic so that the content is 10 parts by mass or more and 35 parts by mass or less when the total content of the binder is 100 parts by mass, and 15 parts by mass or more and 25 parts by mass. It is more preferable to make it contain in the said anticorrosion mastic so that it may become the following.
  • the organic bentonite powder is preferably contained so that the proportion of the organic filler in the inorganic filler is 2% by mass or more and 10% by mass or less.
  • the organic bentonite powder is usually 10 parts by mass or more and 50 parts by mass when the total content of the liquid polyisoprene and liquid polybutadiene is 100 parts by mass. It may be contained in the anticorrosion mastic so as to be less than or equal to part, and is preferably contained in the anticorrosion mastic so as to be not less than 20 parts by mass and not more than 30 parts by mass.
  • the anticorrosion mastic preferably contains 1 to 15% by mass of organic bentonite powder.
  • the organic bentonite powder has an ability of trapping active hydrogen-containing organic compounds (liquid polyisoprene, liquid polybutadiene, etc.) when using an excessively large particle size as compared with the case of using a fine particle size even with the same blending amount.
  • active hydrogen-containing organic compounds liquid polyisoprene, liquid polybutadiene, etc.
  • organic bentonite powder not only organic bentonite powder, but also aluminum hydroxide powder and calcium carbonate powder, which will be described later, when using an excessively large particle size, compared to the case of adopting a fine particle size with the same blending amount
  • the anticorrosion mastic is likely to be sticky, and there is a risk that workability in filling a putty or the like is lowered.
  • the organic bentonite powder is preferably one in which 95% by mass or more passes through the sieve (the remaining amount of the sieve is 5% by mass or less) when sieved with 450 mesh (32 ⁇ m mesh) in the dry state.
  • the aluminum hydroxide powder imparts shape retention to the anticorrosion mastic, for example, to suppress natural flow even at a high temperature of 50 ° C. and to impart flame retardancy to the anticorrosion mastic. It is preferably contained. From the viewpoints of shape retention and flame retardancy, the aluminum hydroxide powder is applied to the anticorrosive mastic so that the content of the binder as a whole is 100 parts by mass, so that it is 150 parts by mass or more and 300 parts by mass or less. It is preferable to contain, and it is more preferable to make it contain in the said anticorrosion mastic so that it may become 180 to 250 mass parts.
  • the aluminum hydroxide powder is preferably contained so that the proportion of the inorganic filler is 40% by mass or more and 60% by mass or less.
  • Aluminum hydroxide undergoes decomposition and dehydration at temperatures of 200 ° C to 350 ° C, and since the dehydration reaction is endothermic, the anticorrosion mastic is heated, and when it is about to start combustion, it exhibits an effect of rapid cooling. To do.
  • the aluminum hydroxide powder preferably has a fine particle size.
  • the anticorrosive mastic becomes tightly tightened, and the easy deformation and spreadability of the anticorrosive mastic are impaired, thereby forming an anticorrosion structure. There is a risk of reducing the properties.
  • the median diameter required by the laser diffraction particle size distribution measuring device is 1 ⁇ m or more and 50 ⁇ m or less (preferably 10 ⁇ m or more and 40 ⁇ m or less) in that the anticorrosion mastic can be excellent in workability and flame retardancy. 99% by mass or more passing through the sieve when sieving with a 75 ⁇ m mesh (less than 1% by mass of sieve residue) is suitable as the aluminum hydroxide powder in this embodiment.
  • (D2c) Calcium carbonate powder It is preferable that the calcium carbonate powder is contained so as to impart shape retention to the anticorrosion mastic as with the aluminum hydroxide powder. From the viewpoint of the shape retention, the calcium carbonate powder is preferably contained in the anticorrosion mastic so that the content of the binder as a whole is 100 parts by mass, so as to be 100 parts by mass or more and 200 parts by mass or less. More preferably, the anticorrosive mastic contains 130 parts by weight or more and 170 parts by weight or less. Further, the calcium carbonate powder is preferably contained in a proportion of 30% by mass or more and 50% by mass or less in the inorganic filler.
  • the anticorrosion mastic may contain an inorganic filler other than the organic bentonite, aluminum hydroxide powder, and calcium carbonate powder as described above.
  • examples of other inorganic fillers that can be contained in the anticorrosion mastic include talc powder, clay powder, and aluminum oxide powder.
  • the total content is preferably 10% by mass or less of the entire inorganic filler, and preferably 5% by mass or less.
  • the anticorrosion mastic preferably has the following configuration from the viewpoints of workability in winter, workability in summer, and utility for filling putty in piping where the surface temperature is high (for example, 80 ° C.).
  • the inorganic filler preferably contains an organic bentonite powder that has been subjected to an organic treatment, an aluminum hydroxide powder, and a calcium carbonate powder.
  • the anticorrosion mastic contains the organic bentonite powder with respect to 100 parts by mass of the oil, preferably 10 parts by mass or more, more preferably 15 to 25 parts by mass, and even more preferably 20 to 25 parts by mass.
  • the mass ratio of the aluminum hydroxide powder to the calcium carbonate powder is preferably 1.00 to 1.50, more preferably 1.08 to 1.40, and even more preferably 1.20. ⁇ 1.33.
  • the inorganic filler is preferably contained in the anticorrosion mastic so that the content of the entire binder is 100 parts by mass or more and 200 parts by mass or less, and 300 parts by mass or more and 400 parts by mass or less. More preferably, it is contained in the anticorrosion mastic.
  • the anticorrosive mastic has the advantage of being excellent in flame retardancy by containing the inorganic filler in the anticorrosive mastic so that the amount is 200 parts by mass or more.
  • the anticorrosive mastic is hard to be hardened by forming the anticorrosive mastic so that the inorganic filler becomes 500 parts by mass or less, and an anticorrosive mastic layer is formed. This has the advantage of being easy to handle.
  • the oil absorption amount of the inorganic filler is preferably 5 mL / 100 g to 50 mL / 100 g, more preferably 10 mL / 100 g to 40 mL / 100 g, and still more preferably 20 mL / 100 g to 30 mL / 100 g.
  • the “oil absorption amount” is measured based on JIS K5101-13-1: 2004 “Pigment test method—Part 13: Oil absorption amount—Section 1: Refined linseed oil method”. Means the value to be.
  • the oil absorption amount of the inorganic filler can be adjusted by the amount of materials constituting the inorganic filler and the amount of various materials in the inorganic filler.
  • the anticorrosion mastic preferably has a consistency at 0 ° C. of 30 or more, more preferably 40 or more and 100 or less, and even more preferably 50 or more and 90 or less.
  • the anticorrosion mastic preferably has a consistency at 40 ° C. of 150 or less, more preferably 50 or more and 130 or less, and even more preferably 60 or more and 100 or less, in consideration of use in summer.
  • the anticorrosion mastic is excellent in spreadability, can be excellent in conformity to the shape of the metal member to be protected, and can be easily smoothed using a fingertip or a spatula at normal temperature ( For example, the consistency at 20 ° C.
  • the anticorrosion mastic is preferably 50 or more and 100 or less, and more preferably 70 or more and 90 or less.
  • the anticorrosion mastic preferably has a consistency of 200 or less, and more preferably 150 or less, at a high temperature (for example, 50 ° C.) assumed in normal use conditions.
  • this “consistency” means a value measured based on “JIS Petroleum Wax 5.10 Consistency Test Method” in JIS K2235-1991.
  • aluminum hydroxide powder or calcium carbonate powder is contained as an inorganic filler in that it can impart shape retention and flame retardancy to the anticorrosive mastic and easy to fine-tune the consistency of the anticorrosive mastic.
  • the anticorrosion mastic of this embodiment may contain only organic bentonite as an inorganic filler. That is, when the inorganic filler is only organic bentonite, characteristics such as the consistency of the anticorrosive mastic to be produced may greatly vary depending on the mixing and stirring conditions with liquid polyisoprene or liquid polybutadiene, etc. Contains aluminum hydroxide powder and calcium carbonate powder in the proportions described above, and most of the effect of suppressing the separation of oil from the anticorrosive mastic is caused by organic bentonite.
  • liquid poly ⁇ -olefin is used together with liquid polyisoprene or liquid polybutadiene having a hydroxyl group at the molecular terminal in that an appropriate viscosity can be exerted on the oil.
  • the anticorrosion mastic may contain only liquid polyisoprene or liquid polybutadiene as an oil component.
  • the anticorrosive mastic basically suppresses separation of the oil from the anticorrosive mastic if it contains organic bentonite powder and liquid polyisoprene or liquid polybutadiene having a hydroxyl group at the molecular end. It is not necessary to contain all the components as exemplified above.
  • the anticorrosion sheet forming the anticorrosion sheet layer A is formed in a tape shape to form an anticorrosion tape 12. Since the anticorrosion structure according to the present embodiment has the anticorrosion sheet layer A, the anticorrosion structure can be prevented from peeling off by hitting an object, and as a result, corrosion of the metal member can be suppressed. .
  • the anticorrosion sheet layer A is formed by wrapping a tape-like anticorrosion sheet (anticorrosion tape) on the undercoat layer C and the anticorrosion mastic layer D, and is formed by half-wrapping the anticorrosion tape. Yes. Therefore, as shown in FIG.
  • the anticorrosion structure 1 of the present embodiment has a two-layer structure including the first layer A1 in contact with the anticorrosion mastic layer D from the outside and the second layer A2 in contact with the first layer A1 from the outside.
  • the anticorrosion sheet layer A is provided.
  • the anticorrosion sheet layer A in the present embodiment is provided on the anticorrosion structure 1 for the purpose of exhibiting anticorrosion properties for metal members and protecting the undercoat material and the anticorrosion mastic.
  • the anticorrosion sheet has a base material and an anticorrosive compound (third anticorrosive compound) impregnated in the base material.
  • the substrate is a porous sheet-like substrate sheet. That is, the anticorrosion tape 12 is formed by impregnating and supporting the third anticorrosion compound 12b on a tape-like base sheet 12a.
  • the material of the base sheet is not particularly limited as long as it can give the anticorrosion tape 12 an appropriate strength. Can be used. Further, the thickness of the base sheet is not particularly limited, and is usually 0.1 to 15 mm, preferably 0.2 to 12 mm, more preferably 0.3 to The thing of thickness 10mm can be employ
  • the third anticorrosive compound contains a binder (A1) containing oil and an inorganic filler (A2). Moreover, it is preferable that a said 3rd anticorrosion compound contains unsaturated oil as oil. Further, the iodine value of the third anticorrosive compound is preferably 10 or more, more preferably 20 to 50. In addition, about the value of an iodine value, it can obtain
  • the third anticorrosive compound contains oil and a functional additive as the binder and an inorganic filler, contains boil oil as the oil, and has a surface treatment material as the functional additive. It is preferable to contain.
  • the third anticorrosive compound contains a boil oil, an inorganic filler, and a surface treatment material, the inorganic filler and the oil can be easily adapted, and as a result, the surface of the anticorrosion sheet layer A can be smooth. .
  • the third anticorrosive compound preferably contains 150 to 300 parts by mass, and particularly preferably 200 to 250 parts by mass of the inorganic filler with respect to 100 parts by mass of the binder. Further, the third anticorrosive compound preferably contains 2 to 20 parts by mass, particularly preferably 5 to 15 parts by mass of the surface treatment material with respect to 100 parts by mass of the oil.
  • the same as the first anticorrosion compound used as the undercoat material can be employed.
  • the binder A1 contains oil (A1a) and a functional additive (A1b).
  • the boil oil contained in the oil those having an iodine value of 130 or more obtained by heat-treating the oil as described above in the presence of a desiccant are suitable.
  • the boiled oil is measured based on the Gardner type foam viscometer method specified in JIS K5600-2-2: 1999 “General test methods for paints—Part 2: Properties and stability of paints—Section 2: Viscosity”.
  • the viscosity (23 ° C.) is preferably between “A1” and “C”.
  • the boil oil contained in the third anticorrosive compound preferably has an iodine value of 130 to 210, and particularly preferably an iodine value of 150 to 190.
  • JIS K5601-2-1 1999 “Paint component test method—Part 2: Component analysis in solvent-soluble matter—Section 1: It is preferable that the acid value calculated
  • the third anticorrosive compound of this embodiment preferably contains 10 to 30% by mass of the oil, and the ratio of the boil oil in the oil is preferably 30% by mass or more.
  • the ratio of the boil oil to the oil is more preferably 40% by mass or more, and particularly preferably 50% by mass or more. That is, in the third anticorrosive compound of the present embodiment, the base oil is preferably a boil oil.
  • the anticorrosive sheet layer A can be formed tightly after the anticorrosive sheet layer A is formed using the anticorrosive tape 12. .
  • the 3rd anticorrosive compound of this embodiment can be made dry after forming the anticorrosion sheet layer A using the anticorrosion tape 12 by being a boil oil. Since the anticorrosion sheet layer A is mildly dried, it can prevent cracks due to rapid drying and the formation of a surface coating that is significantly different from the internal properties, and the coating is formed too quickly. Thus, it is possible to suppress the occurrence of blistering-like foaming.
  • the oil preferably contains rapeseed oil.
  • the ratio of the rapeseed oil in the oil is preferably 25 to 60% by mass, and more preferably 35 to 50% by mass.
  • Examples of the oil constituting the third anticorrosive compound include paraffinic oil, naphthenic oil, aroma oil, and various waxes in addition to boil oil and rapeseed oil. Especially, it is preferable that this oil contains dry oil.
  • Examples of the drying oil to be contained in the third anticorrosive compound include linseed oil, poppy oil, tung oil, shiso oil, walnut oil, cocoon oil, safflower oil, and sunflower oil. Part or all of the drying oil contained in the third anticorrosion compound is a so-called “semi-drying oil” having an iodine value of 100 or more and less than 130, such as corn oil, cottonseed oil, sesame oil, and soybean oil. May be.
  • the third anticorrosive compound is made of non-drying oil having an iodine value of less than 100, such as camellia oil, olive oil, castor oil, coconut oil or the like. You may make it contain suitably.
  • the functional additive preferably contains a surface treatment material.
  • the surface treatment material preferably contains at least one of a silane coupling agent, a titanium coupling agent, and an aluminate coupling agent. Moreover, it is more preferable that the surface treatment material contains a coupling agent represented by the following formula (1).
  • the third anticorrosive compound contains an inorganic filler and a boil oil, and further contains a surface treatment material, whereby the inorganic filler and the boil oil can be easily adapted. As a result, the anticorrosion sheet layer A The surface can be smooth.
  • the inorganic filler contains at least one of magnesium hydroxide and aluminum hydroxide, and magnesium hydroxide and hydroxide in the third anticorrosive compound. Even if the total content of aluminum is 50% by mass or more, the surface of the anticorrosion sheet layer A can be smooth.
  • R 1 is a substituted or unsubstituted hydrocarbon group having 6 or more carbon atoms
  • R 2 is a methyl group or an ethyl group
  • R 3 is a methyl group.
  • R 4 is a methyl group or an ethyl group.
  • the surface treatment material is preferably 1 to 10 parts by mass, more preferably 2 to 6 parts by mass with respect to 100 parts by mass of the inorganic filler.
  • the third anticorrosive compound preferably contains a rust inhibitor as the functional additive.
  • the blending ratio of the anticorrosive agent, inorganic filler, surface treatment material and oil contained in the third anticorrosive compound can be determined as appropriate, but the anticorrosive agent is added to 100 parts by mass of the oil.
  • the content is preferably 1 to 10 parts by mass, particularly preferably 3 to 8 parts by mass.
  • the third anticorrosive compound preferably contains a terpene resin as the functional additive.
  • the functional additive contains a terpene resin
  • the proportion of the terpene resin in the third anticorrosive compound is preferably 3 to 30% by mass, and more preferably 5 to 20% by mass.
  • Part or all of the inorganic filler constituting the third anticorrosive compound is preferably aluminum hydroxide particles, and 50% by mass or more is preferably aluminum hydroxide particles.
  • the functional additive may further include a viscosity modifier or various additives.
  • the inorganic filler constituting the third anticorrosive compound can further contain magnesium hydroxide particles.
  • the inorganic filler contains aluminum hydroxide particles and magnesium hydroxide particles, the total amount is preferably 100 to 250 parts by mass, and 150 to 200 parts by mass with respect to 100 parts by mass of the oil. Is more preferable.
  • the aluminum hydroxide particles (ATH) and the magnesium hydroxide particles (MDH) have a ratio (mass ratio) in the third anticorrosive compound of 1: 1 to 2: 1 (ATH: MDH). It is desirable to include in the third anticorrosive compound.
  • the third anticorrosion compound may further contain a dryer such as cobalt naphthenate or calcium naphthenate.
  • the protective layer B is provided on the most surface side of the anticorrosion structure 1 in order to protect the surface of the anticorrosion sheet layer A formed by the third anticorrosion compound carried on the base sheet.
  • the protective layer B is formed by a film formed by applying a top coat material to the surface of the anticorrosion sheet layer A and drying it.
  • the UV transmittance of the protective layer B is preferably 1% or less, and more preferably 0.5% or less.
  • the anticorrosion structure 1 which concerns on this embodiment can suppress that the polymerization reaction of the unsaturated oil in the said anticorrosion sheet layer A advances too much because the UV transmittance of the said protective layer B is 1% or less.
  • the anticorrosion sheet layer A can be maintained at an appropriate hardness, and cracking of the anticorrosion sheet layer A can be suppressed. And corrosion of a metal member can be suppressed further.
  • the UV (ultraviolet ray) in the UV transmittance means a wavelength of 300 nm.
  • the top coating material preferably contains a binder (B1) and an inorganic filler (B2), and the inorganic filler preferably contains plate-like particles.
  • the plate-like particles can be oriented in a shape along the planar direction of the protective layer.
  • the barrier function of the protective layer B can be exhibited by the plate-like particles.
  • the inorganic filler preferably further contains hollow particles in addition to the plate-like particles (solid plate-like particles). Thereby, the hollow particles can be concentrated on the surface of the protective layer B when the protective layer is formed. As a result, the protective layer B can be excellent in strength due to the hollow particles.
  • Binder B1 of protective layer B The binder contained in the top coat is a liquid at room temperature before the film is formed, and is applied to the surface of the anticorrosion sheet layer A, and then dried and solidified to become the main body of the film. That is, the coating film constituting the protective layer B of the present embodiment has a structure in which an inorganic filler is dispersed in a matrix formed by the solidified product of the binder.
  • the binder of this embodiment can be a solution in which a polymer component such as a polymerizable monomer, a polymerizable oligomer, and a polymer is dissolved in an organic solvent, or an emulsion in which the polymer component is dispersed in an aqueous solvent.
  • a polymer component such as a polymerizable monomer, a polymerizable oligomer, and a polymer
  • the said anticorrosion sheet layer A may melt
  • the binder When the binder is an aqueous emulsion, it is easy to exert excellent strength on the matrix 13a of the film. Therefore, the binder contains an acrylic polymer, an acrylic monomer or an acrylic oligomer that becomes an acrylic polymer by a polymerization reaction.
  • An aqueous acrylic emulsion dispersed in an aqueous solvent is preferred.
  • the acrylic monomer include acrylic acid esters and methacrylic acid esters which are constituent units of general acrylic resins.
  • the binder preferably further contains a polymethacrylic acid type polymer surfactant.
  • the binder is an aqueous acrylic emulsion
  • the film-forming aid to be contained in the top coating material include ethyl carbitol, butyl carbitol, butyl carbitol acetate, ethyl cellosolve, butyl cellosolve, butyl cellosolve acetate, benzyl acetate, 2,2,4-trimethyl-1,3.
  • alcohols such as ethylene glycol, diethylene glycol propylene glycol, hexylene glycol, propylene glycol methyl ether, dipropylene glycol methyl ether, tripropylene glycol methyl ether, propylene glycol methyl ether acetate, dipropylene glycol methyl Ether acetate, propylene glycol n-propyl ether, dipropylene glycol n-propyl ether, Ripropylene glycol n-propyl ether, propylene glycol n-butyl ether, dipropylene glycol n-butyl ether, tripropylene glycol n-butyl ether, propylene glycol phenyl ether, dipropylene glycol dimethyl ether, dipropylene glycol methyl ether and propylene glycol phenyl ether
  • examples thereof include ethers such as a mixture, a mixture of methyl methyl ether, dipropylene glycol methyl ether
  • the protective layer B includes hollow particles as the first inorganic particles and plate-like particles as the second inorganic particles, the protective layer B does not have a clear interface like the anticorrosion sheet layer A.
  • a laminated structure as shown in FIG. 2 can be formed.
  • the topcoat material of this embodiment can easily form a film having a three-layer laminated structure as shown in FIG. 2 by a simple process of application to the surface of the anticorrosion sheet layer A and drying.
  • the top coating material 13x is spread on the surface of the anticorrosion tape 12 forming the anticorrosion sheet layer A by the scraper SC or the like, the top coating material 13x is sheared by the scraper SC. A force is applied, and the plate-like particles 13b are oriented in the shear direction of the top coat 13x (the direction parallel to the surface of the anticorrosion sheet layer A). That is, in the wet coating film formed by the top coating material 13x, the plate-like particles 13b are likely to be arranged to face the surface of the anticorrosion sheet layer A.
  • the cohesive force of the binder acts as a repulsive force against the hollow particles 13c, and the hollow particles 13c are repelled on the surface layer portion of the wet coating film.
  • the apparent density of the hollow particles including the voids included is lower than the density of the binder, the hollow particles easily move to the surface of the coating film due to the action of buoyancy. Then, as the hollow particles move to the coating film surface, the plate-like particles settle toward the surface of the anticorrosion sheet layer A.
  • irregularities due to the hollow particles are formed on the surface of the wet coating film to ensure a large surface area. Therefore, in this embodiment, the speed until the wet coating film forms a dry film is improved by the unevenness.
  • a three-layer laminated structure as shown in FIG. 2 can be formed on the film by such a simple method.
  • the first layer B1 in contact with the surface of the anticorrosion sheet layer A has a relative concentration (mass%) of the plate-like particles 13b as compared with the other two layers.
  • the third layer B3, which is the surface layer portion of the film, has a relatively high concentration (mass%) of the hollow particles 13c compared to the other two layers. Accordingly, in the second layer B2 that forms the central portion in the thickness direction of the three-layer structure of the coating, the concentration (mass%) of the matrix 13a is relatively higher than that of the other two layers.
  • the anticorrosion structure 1 of the present embodiment has the third layer B3 on the outermost surface, and is in a state in which hollow inorganic particles are densely packed on the surface, so that excellent surface lubricity and surface Strength. Furthermore, the anticorrosion structure 1 of the present embodiment is excellent in heat insulation properties because the hollow inorganic particles are concentrated on the outermost surface.
  • the hollow particles 13c are preferably spherical particles, and are preferably glass balloons.
  • the glass balloon is a spherical particle made of soda glass, silica, aluminosilicate (shirasu, fly ash) or the like, and has a median diameter (D50) of 5 to 500 ⁇ m determined by a laser diffraction particle size distribution analyzer. Preferably, it has a particle size such that the sieve residue by the 250 ⁇ m sieve is 5% by mass or less.
  • the plate-like particles 13b oriented along the surface of the anticorrosion sheet layer A are densely arranged in the vicinity of the anticorrosion sheet layer A.
  • the plate-like particles 13b effectively act on light shielding properties and gas barrier properties. That is, the anticorrosion structure 1 of the present embodiment is configured such that the components of the third anticorrosion compound constituting the anticorrosion sheet layer A pass through the protective layer B and exude to the outer surface of the anticorrosion structure 1. It can be suppressed by the shaped particles 13b.
  • the drying oil that is preferably contained in the anticorrosion sheet layer A has many unsaturated bonds, and has a property of exhibiting a dry state due to the progress of a polymerization reaction caused by the cleavage of the unsaturated bonds. Therefore, the anticorrosion structure 1 of the present embodiment has a film in which the plate-like particles 13b are densely packed in the first layer B1 even when the anticorrosion sheet layer A is formed of the third anticorrosion compound as described above. Further, it is possible to suppress light energy from outside such as sunlight from reaching the anticorrosion sheet layer A. That is, the anticorrosion structure 1 of this embodiment has a low possibility that the anticorrosion sheet layer A will be hardened more than necessary by light energy.
  • the anticorrosion structure 1 of the present embodiment has the temperature sensitivity of the undercoat layer C even when it is provided in a place where the environmental temperature greatly changes, such as outdoors, and there are many opportunities to be irradiated with sunlight.
  • the overcoat layer B exhibits light shielding properties, thereby preventing the metallic member 20 from falling off.
  • the plate-like particles are preferably metal particles or metal oxide particles, and preferably iron oxide particles.
  • the plate-like particles 13b preferably has an average length (L ave) is 10 ⁇ 200 [mu] m, the ratio of the average length to the average thickness (t ave) (L ave) (L ave / t ave) 5 It is preferable that it is no less than 30 times and no more than 30 times.
  • the average length (L ave ) of the plate-like particles 13b and the ratio (L ave / t ave ) can be obtained by, for example, observation with a scanning electron microscope (SEM).
  • the plate-like particles 13b are observed with an SEM at a magnification of about 5000 times to find particles (in an upright state) whose plane direction is substantially parallel to the observation direction, and the contour shape of the particles in the SEM observation direction And the longest dimension in the contour shape can be obtained as the length (L) of the particle. Further, the thickness (t) of the particles can be obtained by dividing the area of the contour shape by the length (L). Then, the length (L) and the thickness (t) of ten or more randomly selected particles are obtained, and the average length (L ave ) and the average thickness ( t ave ).
  • the top coat material preferably contains the plate-like particles 13b and the hollow particles 13c so that the respective mass ratios in the coating 13 are 10 to 30% by mass.
  • the topcoat material of this embodiment may contain third inorganic particles (third inorganic particles) in addition to the plate-like particles 13b and the hollow particles 13c.
  • third inorganic particles include solid spherical particles such as fumed silica.
  • fumed silica exhibits a thickening effect on the binder, and exhibits an effect of suppressing the occurrence of dripping before the top coating material applied to the surface of the anticorrosion sheet layer A is cured to form a film. To do.
  • the fumed silica preferably has a specific surface area of 90 to 300 m 2 / g by the BET method.
  • the specific surface area by BET method means the value measured according to JIS Z8830: 2013 (BET specific surface area measuring method of the powder (solid) by gas adsorption).
  • the top coat material preferably has a solid content concentration of 50% by mass or more and 70% by mass or less, and exhibits a solid content concentration of 60% by mass or more and 65% by mass or less in order to exhibit good spreadability on the anticorrosion tape. More preferably.
  • the top coating material preferably contains fumed silica in order to prevent dripping during coating, and preferably contains fumed silica in a proportion of 1 to 5% by mass, and the fumed silica occupies the inorganic particles.
  • the ratio of silica is preferably 2 to 4% by mass.
  • the top coating material preferably has the following configuration from the viewpoint of being difficult to separate, difficult to drip, and difficult to crack. That is, it is preferable that the top coat material includes plate-like particles and fumed silica. Further, in the plate-like particles of the top coat material, the ratio of the average length to the average thickness is preferably 7 to 15. Further, in the fumed silica as the topcoat material, the BET specific surface area is preferably 100 to 400 m 2 / g, more preferably 150 to 300 m 2 / g.
  • the top coat material is advantageous in forming the protective layer B having excellent strength as the proportion of the inorganic particles in the dry film, that is, the proportion of the inorganic solid content in the total of the organic solid content and the inorganic solid content in the top coat material is higher.
  • the protective layer B is easily cracked. Therefore, the ratio of the inorganic solid content to the total of the organic solid content and the inorganic solid content in the top coating material is preferably 50% by mass or more and 70% by mass or less. Further, when the total inorganic solid content is 100% by mass, the plate-like particles 13b and the hollow particles 13c are contained in the top coat so that the total amount of both is 70% by mass or more and 90% by mass or less. Is preferred.
  • the topcoat material of this embodiment contains hollow particles 13c, so that when the coating is applied on the anticorrosion tape, fine irregularities are formed on the surface, the solvent on the surface is excellent in volatility, and the film forming aid is contained.
  • the topcoat material of this embodiment is excellent in surface drying property by containing the film-forming aid.
  • the film-forming aid is effective in preventing cracking of the topcoat layer B, and the proportion of the film-forming aid in the topcoat material is preferably 5% by mass or more.
  • the film-forming aid has a ratio of 10% by mass or less to the top coating material.
  • topcoat material of this embodiment constitutes the outermost surface of the anticorrosion structure 1, it is preferable to contain an ultraviolet absorber or an antioxidant in addition to the above. Moreover, it is the same as the said 3rd anticorrosion compound and undercoat about the point which can further contain various additives etc. in top coat.
  • the anticorrosion structure of the present embodiment is configured as described above, it has the following advantages.
  • the anticorrosion structure of the present embodiment is an anticorrosion structure including an anticorrosion sheet layer A that covers a metal member and a protective layer B that covers the anticorrosion sheet layer A.
  • the anticorrosion sheet layer A is formed of an anticorrosion sheet.
  • the anticorrosion sheet has a base material and an anticorrosive compound impregnated in the base material.
  • the anticorrosion sheet contains an unsaturated oil as the anticorrosion compound.
  • the protective layer B is formed of a top coat material.
  • the UV transmittance of the protective layer B is 1% or less. In such an anticorrosion structure, when the anticorrosion sheet layer A contains an unsaturated oil, the unsaturated oil is cured by a polymerization reaction.
  • such an anticorrosion structure can suppress the polymerization reaction of the unsaturated oil from proceeding excessively when the UV transmittance of the protective layer B is 1% or less.
  • the anticorrosion sheet layer A can be maintained at an appropriate hardness, and cracking of the anticorrosion sheet layer A can be suppressed. Therefore, such an anticorrosion structure can suppress cracking of the anticorrosion sheet layer while suppressing separation of components from the anticorrosion sheet layer.
  • cracking of the anticorrosion sheet can be suppressed while suppressing separation of components from the anticorrosion sheet.
  • the anticorrosion structure according to the present invention is not limited to the above embodiment. Moreover, the anticorrosion structure according to the present invention is not limited to the above-described effects. The anticorrosion structure according to the present invention can be variously modified without departing from the gist of the present invention.
  • anticorrosion structure A an anticorrosion structure (hereinafter referred to as “anticorrosion structure A”) to be compared was formed.
  • a 100A steel pipe was used as a metal member protected by the anticorrosion structure A.
  • a paste containing approximately equal amounts of petrolatum, oxidized petrolatum, petrolatum, and mineral oil was used for the formation of the undercoat layer of the anticorrosion structure A.
  • the paste was applied to the surface of the steel pipe so as to have an application amount of 300 g / m 2 to form an undercoat layer.
  • an anticorrosion tape was wound around the undercoat layer with a half wrap to form an intermediate layer.
  • an overcoat layer was formed using a tape in which a polyester nonwoven fabric base material was impregnated with a liquid containing an acrylic emulsion and a film-forming aid (hereinafter referred to as “emulsion tape”).
  • emulsion tape a polypropylene resin tape having a thickness of 17 ⁇ m is wound around the outer periphery of the anticorrosion tape to block between the intermediate layer and the overcoat layer.
  • a polypropylene resin tape having a thickness of 17 ⁇ m is wound around the outer periphery of the anticorrosion tape to block between the intermediate layer and the overcoat layer.
  • an anticorrosion structure (hereinafter referred to as “anticorrosion structure B”) was produced.
  • This anticorrosion structure B is the same as the anticorrosion structure A in that a 100A steel pipe is used as a metal member.
  • the undercoat layer of the anticorrosion structure B contains about 60% by mass of polybutene, about 10% by mass of organic bentonite particles, and about 25% by mass of talc particles, and the balance is made of a rust inhibitor or the like. An undercoat material was used.
  • the intermediate layer is formed by half-wrapping the anticorrosion tape on the undercoat layer (undercoat material: about 300 g / m 2 ), and without providing a barrier layer made of polypropylene resin tape.
  • An overcoat layer was formed.
  • an aqueous acrylic emulsion, a film-forming aid, a fly ash balloon (hollow particles: average particle size of about 150 ⁇ m, maximum particle size of about 400 ⁇ m, bulk density of 0.7 g / cm 3 ), mica-like oxidation Iron (plate-like particles: average length of about 50 ⁇ m, average thickness of about 5 ⁇ m) and fumed silica, solid content concentration over 60% by mass (organic solid content: inorganic solid content ⁇ 4: 6, mass ratio)
  • the organic component is mainly an acrylic resin contained in the aqueous acrylic emulsion, and about 80% by mass of the inorganic solid content is either fly ash balloon or mica-like iron oxide.
  • a top coating material having a mass ratio of about 2: 3 was used.
  • the UV transmittance (UV wavelength: 300 nm) of the overcoat layer was 1% or less.
  • the anticorrosion tape is usually sticky at room temperature in order to exhibit good adhesion to the adherend even during construction in cold regions. Therefore, when forming the anticorrosion structure A, an emulsion tape is wound on a polypropylene resin tape.
  • the top coat material of the anticorrosion structure B is in a liquid state, it was easy to apply the top coat layer directly on the anticorrosion tape to form an overcoat layer. That is, the anticorrosion structure B was easier to produce than the anticorrosion structure A.
  • Heat cycle test A heat cycle test was performed using the anticorrosion structure B (not punched with a punch). In the test, a total of 8 hours of “40 ° C. ⁇ 4 hours” and “110 ° C. ⁇ 4 hours” was defined as one cycle, and 50 heat cycles were added to the anticorrosion structure B. As a result, the corrosion prevention structure B did not show any bleed-out or other abnormal appearance.
  • anticorrosion structure a the anticorrosion structure having the same structure as the anticorrosion structure A
  • anticorrosion structure having the same structure as the anticorrosion structure B A body (hereinafter referred to as “anticorrosion structure b”) was produced.
  • the anticorrosion structure a and the anticorrosion structure b were produced outdoors in winter where snowfall was observed at a temperature of 2 ° C.
  • the anticorrosion structure a and the anticorrosion structure b were left outdoors as they were overnight, and the respective states were confirmed the next day.
  • the night temperature of the day when these were left unattended was -4 ° C.
  • top coat # 0 the top coat with the same composition as the top coat used to form the anticorrosion structure B (hereinafter referred to as “top coat # 0”) except that the amount of water was increased by adding water corresponding to about 10% of the top coat.
  • coating material # 1 A material (hereinafter referred to as “coating material # 1”) was produced.
  • This topcoat material # 1 had a solid content concentration of slightly less than 60% by mass and was excellent in coating properties on the anticorrosion tape, but was liable to sag and it was difficult to form a topcoat layer having a uniform thickness. It was a thing.
  • top coating material # 2 a top coating material in which the water content was not about 10% but about 0.8% (about 8 minutes) was produced. Even in the evaluation of the top coating material # 2, liquid dripping occurred although it was slight compared with the top coating material # 1.
  • a top coat material having the same moisture content as that of the top coat material # 0 and different types of fly ash balloons to be used was produced.
  • the fly ash balloon used here contained more coarse particles than the fly ash balloon used in the top coat material # 0. This fly ash balloon was sieved into a sieve residue (coarse particles) and a sieve passing component (fine particles) with a 250 ⁇ m mesh.
  • top coat material # 3 The top coat using the sieve residue
  • top coat material # 4 the top coat using the sieve passage
  • top coat material # 5 Three types of top coating materials (hereinafter referred to as “top coating material # 5”) using ash balloons as they were were prepared.
  • the topcoat material # 3 to topcoat material # 5 exhibited excellent coatability and no dripping when forming the topcoat layer.
  • irregularities that appear to be caused by the presence of coarse particles are observed on the surface, and the appearance is larger than the topcoat layer formed by the topcoat material # 4.
  • topcoat material # 5 Three types of top coating materials
  • top coating material # 6 About 0.4% (about 4 minutes) of the top coating material (hereinafter referred to as “top coating material # 6”) obtained by adding about 4 minutes of water to the top coating material # 4 and the top coating material # 4
  • a top coating material (hereinafter referred to as “top coating material # 7”) was prepared by adding water and increasing the film-forming aid.
  • the solid content concentration of the top coating material # 6 and the top coating material # 7 is about 60% by mass, and the concentration of the film forming aid of the top coating material # 6 is slightly less than 5% by mass.
  • the concentration of the film forming aid of # 7 was slightly over 5% by mass.
  • topcoat material # 6 and the topcoat material # 7 were all free from liquid dripping and exhibited excellent coatability when forming the topcoat layer. However, when the top coat material # 1 to the top coat material # 7 were evaluated to be held in an environment of 5 ° C. for 8 hours after the top coat layer was formed, only the top coat layer formed by the top coat material # 6 was cracked on the surface. It was observed. From the above, it is confirmed that the solid content concentration is 60% by mass or more, and the concentration of the film-forming aid is 5% by mass or more, which is advantageous in making the wet coating film and the dry coating state good. did it.
  • FIG. 4 is a plan view of a specimen for a weather resistance test, and the right figure shows a cross-sectional view taken along line II of the left figure.
  • a stainless steel plate BP material: SUS304
  • a thickness of 0.6 mm, a width of 70 mm, and a length of 150 mm is prepared for the preparation of a specimen for a weather resistance test.
  • a steel plate SP having a square shape was placed on the center of the steel plate, and an undercoat layer C was formed in a range of 50 mm ⁇ 100 mm so as to cover the whole steel plate SP with an undercoat material.
  • an undercoat layer C two anticorrosion tapes having the same area (50 mm ⁇ 100 mm) were laminated to form an anticorrosion sheet layer A, and an overcoat layer B was formed thereon with a topcoat material.
  • the anticorrosive compound of this anticorrosive tape is a mixture of boil oil, rapeseed white squeezed oil and hydrogenated terpene resin.
  • the mass ratio of boiled oil, rapeseed white squeezed oil, and hydrogenated terpene resin is 1: 1: 2.
  • UV transmittance (UV wavelength: 300 nm) of the overcoat layer was 1% or less. This specimen was attached to a sample holder of a “sunshine weatherometer”, and a weather resistance test was conducted for 1000 hours at a black panel temperature of 63 ° C. and 18 minutes of 120 minutes of rainfall conditions.
  • the test specimen was disassembled to confirm the occurrence of rust in the internal steel sheet.
  • the topcoat layer B was not particularly deteriorated in appearance due to the irradiation of the carbon arc.
  • no bleed out from the specimen was observed.
  • the steel plate taken out from the test body was free from rust. From this, it has been confirmed that the anticorrosion structure has excellent weather resistance and can exhibit excellent anticorrosion performance in actual use for a long period of time.
  • An anticorrosion structure was formed.
  • a 100A steel pipe was used as a metal member protected by this anticorrosion structure.
  • the undercoat material shown in Table 1 below was used to form the undercoat layer of the anticorrosion structure.
  • the undercoat material was applied to the surface of the steel pipe so as to have an application amount of 300 g / m 2 to form an undercoat layer.
  • an anticorrosion tape was wound around the undercoat layer with a half wrap to form an intermediate layer.
  • an overcoat layer was formed using a tape (hereinafter referred to as “emulsion tape”) in which a polyester nonwoven fabric substrate was impregnated with a liquid containing an acrylic emulsion and a film-forming aid.
  • the polypropylene resin tape which has thickness of 17 micrometers was wound around the outer periphery of the anticorrosion tape, and the interruption
  • the evaluation sample S is placed on the angle material L so that the longitudinal direction is perpendicular to the angle material L, and the evaluation sample S is placed about 25 mm inside from the end by the two angle materials L, respectively.
  • the position was supported.
  • the ambient temperature was set to 80 ° C., and the degree of deformation after 12 hours was observed.
  • the degree of deformation the distance (deformation distance) at which the anticorrosion mastic sag most between the two angle members L was measured.
  • Test Examples 3-1 to 3-8 containing 20 parts by mass or more of organic bentonite powder with respect to 100 parts by mass of oil, and the mass ratio of aluminum hydroxide powder to calcium carbonate powder being 1.08 to 1.33
  • the deformation distance in the slump test was shorter than those in Test Examples 3-9, 3-11, and 3-12. Therefore, it can be seen that the anticorrosion mastics of Test Examples 3-1 to 3-8 are suitable for use in filling putty of piping whose surface temperature is high (for example, 80 ° C.). Further, in the anticorrosion mastics of Test Examples 3-1 to 3-8, the consistency at 0 ° C. was higher than that of Test Examples 3-10 and 3-12, which was 30 or more.
  • the anticorrosion mastics of Test Examples 3-1 to 3-8 are excellent in winter construction. Further, in the anticorrosion mastics of Test Examples 3-1 to 3-8, the consistency at 40 ° C. was lower than that of Test Examples 3-9 and 3-11, which was 150 or less. Therefore, it can be seen that the anticorrosion mastics of Test Examples 3-1 to 3-8 are suitable for use in summer.
  • topcoat materials shown in Tables 4 and 5 below were prepared using the following materials.
  • the fly ash balloon was sieved into a sieve residue (coarse particles) and a sieve passing component (fine particles) with a 250 ⁇ m mesh.
  • Aqueous Acrylic Emulsion Fly Ash Balloon A Unscreened Fly Ash Balloon B: Screened Part (Fine Granules) Fly ash balloon C: sieve residue (coarse) Aluminosilicate hollow balloon (Phylite 52 / 7FG) Plate-like particles A: Mica-like iron oxide having an average length of 120 ⁇ m and a ratio of the average length to the average thickness of 10 Plate-like particles B: Mica-like having an average length of 50 ⁇ m and a ratio of the average length to the average thickness of 3 Iron oxide Calcium carbonate Fumed silica A: BET specific surface area 200 m 2 / g Fumed silica B: BET specific surface area of 50 m 2 / g Film-forming aid Water Other additives
  • viscosity The viscosity was measured with a B-type viscometer (single cylindrical rotational viscometer) (rotor: No. 3) when the rotational speed was 20 rpm and when the rotational speed was 2 rpm (JIS Z8803). : 2011). Moreover, the thixotropy index (TI value) was calculated
  • required by the following formula. TI value Viscosity at 2 rpm / Viscosity at 20 rpm
  • Test Examples 5-1 to 5 having plate-like particles having an average length to average thickness ratio of 7 to 15 and fumed silica having a BET specific surface area of 100 to 400 m 2 / g. It can be seen that the 5-5 topcoat material is difficult to separate, difficult to drip, and difficult to crack.
  • Test Examples 5-1 to 5-5 are more difficult to separate than Test Examples 5-9 and 5-10 having a high water content, and It can be seen that it is difficult to drip.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Laminated Bodies (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Paints Or Removers (AREA)
PCT/JP2017/046998 2017-03-30 2017-12-27 防食構造体 WO2018179652A1 (ja)

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MYPI2019005566A MY196639A (en) 2017-03-30 2017-12-27 Anti-Corrosive Structure
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JP2021187017A (ja) * 2020-05-27 2021-12-13 大日本塗料株式会社 構造物表面の保護工法
FR3127933A1 (fr) * 2021-10-08 2023-04-14 Safran Helicopter Engines Piece d’attache pour un ensemble propulsif d’aeronef

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JP7258522B2 (ja) * 2018-11-22 2023-04-17 株式会社エーアンドエーマテリアル 伸縮継手、伸縮継手の防食方法および伸縮継手のメンテナンス方法
JP7313891B2 (ja) * 2019-04-25 2023-07-25 株式会社エーアンドエーマテリアル 伸縮継手および伸縮継手の防食方法
CN110939819B (zh) * 2019-11-27 2021-04-06 成都龙之泉科技股份有限公司 一种用于管道修复内衬软管的材料层
RU2743604C1 (ru) * 2020-08-03 2021-02-20 Николай Николаевич Петров Способ противокоррозионной защиты катодно-поляризуемых подземных металлических сооружений со слоем полимерного компаунда в изолирующем покрытии, полимерный компаунд для изолирующего покрытия катодно-поляризуемых подземных металлических сооружений и применение микрочастиц анионита
RU2760782C1 (ru) * 2020-12-28 2021-11-30 Федеральное государственное бюджетное образовательное учреждение высшего образования "Тамбовский государственный университет имени Г.Р. Державина" (ФГБОУ ВО "Тамбовский государственный университет имени Г.Р. Державина, ТГУ им. Г.Р. Державина") Защитное покрытие стального трубопровода от подземной коррозии
RU2771344C1 (ru) * 2021-01-11 2022-04-29 Федеральное государственное бюджетное образовательное учреждение высшего образования "Тамбовский государственный университет имени Г.Р. Державина" (ФГБОУ ВО "Тамбовский государственный университет имени Г.Р. Державина") Ингибитор анодного действия подземной коррозии стали
JP7054586B1 (ja) 2021-01-21 2022-04-14 日東電工株式会社 プライマー、及び、防食構造体
JP7042370B1 (ja) * 2021-01-21 2022-03-25 日東電工株式会社 防食テープ、及び、防食構造体
CN115042487A (zh) * 2021-03-09 2022-09-13 日东电工株式会社 防腐蚀结构体

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FR3127933A1 (fr) * 2021-10-08 2023-04-14 Safran Helicopter Engines Piece d’attache pour un ensemble propulsif d’aeronef

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JP2018168455A (ja) 2018-11-01
JP6390742B1 (ja) 2018-09-19
CN110431255B (zh) 2021-07-16

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